testlib.py 41.5 KB
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# 
# (c) Simon Marlow 2002
#

import sys
import os
import string
import re
import traceback
import copy
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import glob
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have_subprocess = False
try:
    import subprocess
    have_subprocess = True
except:
    print "Warning: subprocess not found, will fall back to spawnv"

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from string import join
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from testglobals import *
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from testutil import *

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if config.use_threads:
    import threading
    import thread
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# Options valid for all the tests in the current "directory".  After
# each test, we reset the options to these.  To change the options for
# multiple tests, the function setTestOpts() below can be used to alter
# these options.
global thisdir_testopts
thisdir_testopts = TestOptions()

def getThisDirTestOpts():
    return thisdir_testopts

# Options valid for the current test only (these get reset to
# testdir_testopts after each test).
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global testopts_local
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if config.use_threads:
    testopts_local = threading.local()
else:
    class TestOpts_Local:
        pass
    testopts_local = TestOpts_Local()
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def getTestOpts():
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    return testopts_local.x
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def setLocalTestOpts(opts):
    global testopts_local
    testopts_local.x=opts
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# This can be called at the top of a file of tests, to set default test options
# for the following tests.
def setTestOpts( f ):
    f( thisdir_testopts );

# -----------------------------------------------------------------------------
# Canned setup functions for common cases.  eg. for a test you might say
#
#      test('test001', normal, compile, [''])
#
# to run it without any options, but change it to
#
#      test('test001', expect_fail, compile, [''])
#
# to expect failure for this test.

def normal( opts ):
    return;

def skip( opts ):
    opts.skip = 1

def expect_fail( opts ):
    opts.expect = 'fail';

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def reqlib( lib ):
    return lambda opts, l=lib: _reqlib (opts, l )

def _reqlib( opts, lib ):
    # opts.reqlibs.append(lib)
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    if have_subprocess:
        # By preference we use subprocess, as the alternative uses /dev/null
        # which mingw doesn't have.
        p = subprocess.Popen([config.ghc_pkg, 'describe', lib],
                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        # read from stdout and stderr to avoid blocking due to buffers filling
        p.communicate()
        r = p.wait()
    else:
        r = os.system(config.ghc_pkg + ' describe ' + lib + ' > /dev/null 2> /dev/null')

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    if r != 0:
        opts.expect = 'fail'

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def req_profiling( opts ):
    if not config.have_profiling:
        opts.expect = 'fail'

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def expect_broken( bug ):
    return lambda opts, b=bug: _expect_broken (opts, b )

def _expect_broken( opts, bug ):
    opts.expect = 'fail';

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def ignore_output( opts ):
    opts.ignore_output = 1

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def no_stdin( opts ):
    opts.no_stdin = 1

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# -----

def expect_fail_for( ways ):
    return lambda opts, w=ways: _expect_fail_for( opts, w )

def _expect_fail_for( opts, ways ):
    opts.expect_fail_for = ways

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def expect_broken_for( bug, ways ):
    return lambda opts, b=bug, w=ways: _expect_broken_for( opts, b, w )

def _expect_broken_for( opts, bug, ways ):
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    opts.expect_fail_for = ways
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# -----

def omit_ways( ways ):
    return lambda opts, w=ways: _omit_ways( opts, w )

def _omit_ways( opts, ways ):
    opts.omit_ways = ways

# -----

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def only_ways( ways ):
    return lambda opts, w=ways: _only_ways( opts, w )

def _only_ways( opts, ways ):
    opts.only_ways = ways

# -----

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def extra_ways( ways ):
    return lambda opts, w=ways: _extra_ways( opts, w )

def _extra_ways( opts, ways ):
    opts.extra_ways = ways

# -----

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def omit_compiler_types( compiler_types ):
   return lambda opts, c=compiler_types: _omit_compiler_types(opts, c)

def _omit_compiler_types( opts, compiler_types ):
    if config.compiler_type in compiler_types:
	opts.skip = 1

# -----

def only_compiler_types( compiler_types ):
   return lambda opts, c=compiler_types: _only_compiler_types(opts, c)

def _only_compiler_types( opts, compiler_types ):
    if config.compiler_type not in compiler_types:
	opts.skip = 1

# -----

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def expect_fail_if_platform( plat ):
   return lambda opts, p=plat: _expect_fail_if_platform(opts, p)

def _expect_fail_if_platform( opts, plat ):
    if config.platform == plat:
	opts.expect = 'fail'
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def expect_broken_if_platform( bug, plat ):
   return lambda opts, b=bug, p=plat: _expect_broken_if_platform(opts, b, p)

def _expect_broken_if_platform( opts, bug, plat ):
    if config.platform == plat:
	opts.expect = 'fail'
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# -----

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def expect_fail_if_compiler_type( compiler_type ):
   return lambda opts, c=compiler_type: _expect_fail_if_compiler_type(opts, c)

def _expect_fail_if_compiler_type( opts, compiler_type ):
    if config.compiler_type == compiler_type:
	opts.expect = 'fail'

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def expect_broken_if_compiler_type( bug, compiler_type ):
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   return lambda opts, b=bug, c=compiler_type: _expect_broken_if_compiler_type(opts, b, c)

def _expect_broken_if_compiler_type( opts, bug, compiler_type ):
    if config.compiler_type == compiler_type:
	opts.expect = 'fail'

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# -----

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def set_stdin( file ):
   return lambda opts, f=file: _set_stdin(opts, f);

def _set_stdin( opts, f ):
   opts.stdin = f

# -----

def exit_code( val ):
    return lambda opts, v=val: _exit_code(opts, v);

def _exit_code( opts, v ):
    opts.exit_code = v

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def exit_code_if_platform( val, plat ):
   return lambda opts, v=val, p=plat: _exit_code_if_platform(opts, v, p)

def _exit_code_if_platform( opts, val, plat ):
    if config.platform == plat:
        opts.exit_code = val

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# -----

def extra_run_opts( val ):
    return lambda opts, v=val: _extra_run_opts(opts, v);

def _extra_run_opts( opts, v ):
    opts.extra_run_opts = v

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# -----

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def no_clean( opts ):
    opts.cleanup = '';

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def extra_clean( files ):
    return lambda opts, v=files: _extra_clean(opts, v);

def _extra_clean( opts, v ):
    opts.clean_files = v

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# -----

def skip_if_no_ghci(opts):
  if not ('ghci' in config.run_ways):
      opts.skip = 1

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# ----

def skip_if_fast(opts):
  if config.fast:
      opts.skip = 1

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# -----

def skip_if_platform( plat ):
   return lambda opts, p=plat: _skip_if_platform(opts, p)

def _skip_if_platform( opts, plat ):
    if config.platform == plat:
	opts.skip = 1
	
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# ---

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def expect_broken_if_compiler_ge( bug, compiler, version ):
   return lambda opts, c=compiler, v=version: \
                 _expect_fail_if_compiler_ge(opts, c, v)

def expect_fail_if_compiler_ge( compiler, version ):
   return lambda opts, c=compiler, v=version: \
                 _expect_fail_if_compiler_ge(opts, c, v)

def _expect_fail_if_compiler_ge( opts, compiler, version ):
    if config.compiler_type == compiler and \
       version_ge(config.compiler_version, version):
        opts.expect = 'fail'

def expect_broken_if_compiler_gt( bug, compiler, version ):
   return lambda opts, c=compiler, v=version: \
                 _expect_fail_if_compiler_gt(opts, c, v)

def expect_fail_if_compiler_gt( compiler, version ):
   return lambda opts, c=compiler, v=version: \
                 _expect_fail_if_compiler_gt(opts, c, v)

def _expect_fail_if_compiler_gt( opts, compiler, version ):
    if config.compiler_type == compiler and \
       version_gt(config.compiler_version, version):
        opts.expect = 'fail'

def expect_broken_if_compiler_le( bug, compiler, version ):
   return lambda opts, c=compiler, v=version: \
                 _expect_fail_if_compiler_le(opts, c, v)

def expect_fail_if_compiler_le( compiler, version ):
   return lambda opts, c=compiler, v=version: \
                 _expect_fail_if_compiler_le(opts, c, v)

def _expect_fail_if_compiler_le( opts, compiler, version ):
    if config.compiler_type == compiler and \
       version_le(config.compiler_version, version):
        opts.expect = 'fail'

def expect_broken_if_compiler_lt( bug, compiler, version ):
   return lambda opts, c=compiler, v=version: \
                 _expect_fail_if_compiler_lt(opts, c, v)

def expect_fail_if_compiler_lt( compiler, version ):
   return lambda opts, c=compiler, v=version: \
                 _expect_fail_if_compiler_lt(opts, c, v)

def _expect_fail_if_compiler_lt( opts, compiler, version ):
    if config.compiler_type == compiler and \
       version_lt(config.compiler_version, version):
        opts.expect = 'fail'

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def expect_broken_ways_if_compiler_lt( bug, compiler, version, ways ):
   return lambda opts, c=compiler, v=version, w=ways: \
                 _expect_fail_ways_if_compiler_lt(opts, c, v, w)

def expect_fail_ways_if_compiler_lt( compiler, version, ways ):
   return lambda opts, c=compiler, v=version, w=ways: \
                 _expect_fail_ways_if_compiler_lt(opts, c, v, w)

def _expect_fail_ways_if_compiler_lt( opts, compiler, version, ways ):
    if config.compiler_type == compiler and \
       version_lt(config.compiler_version, version):
        opts.expect_fail_for = ways

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def namebase_if_compiler_lt( compiler, version, namebase ):
   return lambda opts, c=compiler, v=version, nb=namebase: \
                 _namebase_if_compiler_lt(opts, c, v, nb)

def _namebase_if_compiler_lt( opts, compiler, version, namebase ):
    if config.compiler_type == compiler and \
       version_lt(config.compiler_version, version):
        opts.namebase = namebase

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# ---

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def skip_if_tag( tag ):
   return lambda opts, t=tag: _skip_if_tag(opts, t)

def _skip_if_tag( opts, tag ):
    if tag in config.compiler_tags:
	opts.skip = 1
	
def skip_unless_tag( tag ):
   return lambda opts, t=tag: _skip_unless_tag(opts, t)

def _skip_unless_tag( opts, tag ):
    if not (tag in config.compiler_tags):
	opts.skip = 1
	
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# ---
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def alone(opts):
    opts.alone = 1
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# ---
def literate( opts ):
    opts.literate = 1;

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def c_src( opts ):
    opts.c_src = 1;

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# ----
# Function for composing two opt-fns together

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def composes( fs ):
    return reduce(lambda f, g: compose(f, g), fs)

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def compose( f, g ):
    return lambda opts, f=f, g=g: _compose(opts,f,g)

def _compose( opts, f, g ):    
    f(opts)
    g(opts)

# -----------------------------------------------------------------------------
# The current directory of tests

global testdir
testdir = '.'

def newTestDir( dir ):
    global testdir, thisdir_testopts
    testdir = dir
    # reset the options for this test directory
    thisdir_testopts = copy.copy(default_testopts)

def getTestDir():
    return testdir

# -----------------------------------------------------------------------------
# Actually doing tests

# name  :: String
# setup :: TestOpts -> IO ()  
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def test ( name, setup, func, args):
    n = 1
    opts = copy.copy(thisdir_testopts)
    setup(opts)
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    if opts.alone:
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        n = config.threads
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    ok = 0

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    if config.use_threads:
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        t.thread_pool.acquire()
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        try:
            while config.threads<(t.running_threads+n):
                t.thread_pool.wait()
            t.running_threads = t.running_threads+n
            ok=1
            t.thread_pool.release()
            thread.start_new_thread(test_common_thread, (n, name, opts, func, args))
        except:
            if not ok:
                t.thread_pool.release()
    else:
        test_common_work (name, opts, func, args)
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if config.use_threads:
    def test_common_thread(n, name, opts, func, args):
        t.lock.acquire()
        try:
            test_common_work(name,opts,func,args)
        finally:
            t.lock.release()
            t.thread_pool.acquire()
            t.running_threads = t.running_threads - n
            t.thread_pool.notify()
            t.thread_pool.release()
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def test_common_work (name, opts, func, args):
    t.total_tests = t.total_tests+1
    setLocalTestOpts(opts)
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    # All the ways we might run this test
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    if func == compile or func == multimod_compile:
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        all_ways = config.compile_ways
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    elif func == compile_and_run or func == multimod_compile_and_run \
        or func == multimod_compile_and_run_with_prefix \
        or func == compile_and_run_with_prefix:
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        all_ways = config.run_ways
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    elif func == ghci_script:
        if 'ghci' in config.run_ways:
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            all_ways = ['ghci']
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        else:
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            all_ways = []
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    else:
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        all_ways = ['normal']

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    # A test itself can request extra ways by setting opts.extra_ways
    all_ways = all_ways + filter(lambda way: way not in all_ways,
                                 opts.extra_ways)
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    t.total_test_cases = t.total_test_cases + len(all_ways)

    ok_way = lambda way: \
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        not getTestOpts().skip \
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        and (config.only == [] or name in config.only) \
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        and (getTestOpts().only_ways == [] or way in getTestOpts().only_ways) \
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        and (config.cmdline_ways == [] or way in config.cmdline_ways) \
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        and way not in getTestOpts().omit_ways
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    # Which ways we are asked to skip
    do_ways = filter (ok_way,all_ways)

    # In fast mode, we skip all but one way
    if config.fast and len(do_ways) > 0:
        do_ways = [do_ways[0]]

    # Run the required tests...
    for way in do_ways:
        do_test (name, way, func, args)

    for way in all_ways:
        if way not in do_ways:
            skiptest (name,way)
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    clean(map (lambda suff: name + suff,
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              ['', '.exe', '.genscript',
               '.run.stderr',            '.run.stdout',
               '.run.stderr.normalised', '.run.stdout.normalised',
               '.comp.stderr',            '.comp.stdout',
               '.comp.stderr.normalised', '.comp.stdout.normalised',
               '.interp.stderr',            '.interp.stdout',
               '.interp.stderr.normalised', '.interp.stdout.normalised',
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               '.hi', '.o', '.prof', '.exe.prof', '.hc', '_stub.h', '_stub.c',
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               '_stub.o', '.hp', '.exe.hp', '.ps', '.aux', '.hcr']))
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    clean(getTestOpts().clean_files)

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def clean(names):
    clean_full_paths(map (lambda name: in_testdir(name), names))

def clean_o_hi():
    clean_full_paths(glob.glob(in_testdir('*.o')) + glob.glob(in_testdir('*.hi')))

def clean_full_paths(names):
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    if getTestOpts().cleanup != '':
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        for name in names:
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            try:
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                os.remove(name)
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            except OSError:
                pass
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def do_test(name, way, func, args):
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    full_name = name + '(' + way + ')'

    try:
        print '=====>', full_name
        
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        if config.use_threads:
            t.lock.release()
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        try:
            result = apply(func, [name,way] + args)
        finally:
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            if config.use_threads:
                t.lock.acquire()
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        if getTestOpts().expect != 'pass' and getTestOpts().expect != 'fail' or \
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           result != 'pass' and result != 'fail':
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            framework_fail(name, way)
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        if result == 'pass':
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            if getTestOpts().expect == 'pass' \
               and way not in getTestOpts().expect_fail_for:
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                t.n_expected_passes = t.n_expected_passes + 1
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                if name in t.expected_passes:
                    t.expected_passes[name].append(way)
                else:
                    t.expected_passes[name] = [way]
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            else:
                print '*** unexpected pass for', full_name
                t.n_unexpected_passes = t.n_unexpected_passes + 1
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                if name in t.unexpected_passes:
                    t.unexpected_passes[name].append(way)
                else:
                    t.unexpected_passes[name] = [way]
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        else:
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            if getTestOpts().expect == 'pass' \
               and way not in getTestOpts().expect_fail_for:
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                print '*** unexpected failure for', full_name
                t.n_unexpected_failures = t.n_unexpected_failures + 1
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                if name in t.unexpected_failures:
                    t.unexpected_failures[name].append(way)
                else:
                    t.unexpected_failures[name] = [way]
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            else:
                t.n_expected_failures = t.n_expected_failures + 1
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                if name in t.expected_failures:
                    t.expected_failures[name].append(way)
                else:
                    t.expected_failures[name] = [way]
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    except:
        print '*** framework failure for', full_name, ':'
        traceback.print_exc()
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        framework_fail(name, way)
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def skiptest (name, way):
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    # print 'Skipping test \"', name, '\"'
    t.n_tests_skipped = t.n_tests_skipped + 1
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    if name in t.tests_skipped:
        t.tests_skipped[name].append(way)
    else:
        t.tests_skipped[name] = [way]
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def framework_fail( name, way ):
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    t.n_framework_failures = t.n_framework_failures + 1
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    if name in t.framework_failures:
        t.framework_failures[name].append(way)
    else:
        t.framework_failures[name] = [way]
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# -----------------------------------------------------------------------------
# Generic command tests

# A generic command test is expected to run and exit successfully.
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#
# The expected exit code can be changed via exit_code() as normal, and
# the expected stdout/stderr are stored in <testname>.stdout and
# <testname>.stderr.  The output of the command can be ignored
# altogether by using run_command_ignore_output instead of
# run_command.
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def run_command( name, way, cmd ):
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    return simple_run( name, '', cmd, '' )
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# -----------------------------------------------------------------------------
# GHCi tests

def ghci_script( name, way, script ):
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    # filter out -no-recomp from compiler_always_flags, becuase we're
    # actually testing the recompilation behaviour in the GHCi tests.
    flags = filter(lambda f: f != '-no-recomp', config.compiler_always_flags)

    # We pass HC and HC_OPTS as environment variables, so that the
    # script can invoke the correct compiler by using ':! $HC $HC_OPTS'
    cmd = "HC='" + config.compiler + "' " + \
          "HC_OPTS='" + join(flags,' ') + "' " + \
          "'" + config.compiler + "'" + \
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          ' --interactive -v0 -ignore-dot-ghci' + \
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          join(flags,' ')

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    getTestOpts().stdin = script
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    return simple_run( name, way, cmd, getTestOpts().extra_run_opts )
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# -----------------------------------------------------------------------------
# Compile-only tests

def compile( name, way, extra_hc_opts ):
    return do_compile( name, way, 0, '', extra_hc_opts )

def compile_fail( name, way, extra_hc_opts ):
    return do_compile( name, way, 1, '', extra_hc_opts )

def multimod_compile( name, way, top_mod, extra_hc_opts ):
    return do_compile( name, way, 0, top_mod, extra_hc_opts )

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def multimod_compile_fail( name, way, top_mod, extra_hc_opts ):
    return do_compile( name, way, 1, top_mod, extra_hc_opts )

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def do_compile( name, way, should_fail, top_mod, extra_hc_opts ):
    # print 'Compile only, extra args = ', extra_hc_opts
    pretest_cleanup(name)
    result = simple_build( name, way, extra_hc_opts, should_fail, top_mod, 0 )
    
    if should_fail:
        if result == 0:
            return 'fail'
    else:
        if result != 0:
            return 'fail'

    # the actual stderr should always match the expected, regardless
    # of whether we expected the compilation to fail or not (successful
    # compilations may generate warnings).

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    if getTestOpts().namebase == None:
        namebase = name
    else:
        namebase = getTestOpts().namebase

    (platform_specific, expected_stderr_file) = platform_wordsize_qualify(namebase, 'stderr')
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    actual_stderr_file = qualify(name, 'comp.stderr')

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    if not compare_outputs('stderr', normalise_errmsg, normalise_whitespace, \
                           expected_stderr_file, actual_stderr_file):
        return 'fail'
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    # no problems found, this test passed
    return 'pass'

# -----------------------------------------------------------------------------
# Compile-and-run tests

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def compile_and_run__( name, way, extra_hc_opts, top_mod, prefix_cmd ):
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    # print 'Compile and run, extra args = ', extra_hc_opts
    pretest_cleanup(name)

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    if way == 'ghci': # interpreted...
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        return interpreter_run( name, way, extra_hc_opts, 0, top_mod )
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    elif way == 'extcore' or way == 'optextcore' :
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        return extcore_run( name, way, extra_hc_opts, 0, top_mod )
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    else: # compiled...
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        result = simple_build( name, way, extra_hc_opts, 0, top_mod, 1 )
        
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        if result != 0:
            return 'fail'

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        cmd = './' + name;
        if prefix_cmd != '':
            cmd = prefix_cmd + ' ' + cmd;

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        # we don't check the compiler's stderr for a compile-and-run test
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        return simple_run( name, way, cmd, getTestOpts().extra_run_opts )

def compile_and_run( name, way, extra_hc_opts):
    return compile_and_run__( name, way, extra_hc_opts, '' , '')
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def compile_and_run_with_prefix( name, way, prefix, extra_hc_opts):
    return compile_and_run__( name, way, extra_hc_opts, '' , prefix )
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def multimod_compile_and_run( name, way, top_mod, extra_hc_opts ):
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    return compile_and_run__( name, way, extra_hc_opts, top_mod, '' )

def multimod_compile_and_run_with_prefix( name, way, prefix, top_mod, extra_hc_opts ):
    return compile_and_run__( name, way, extra_hc_opts, top_mod, prefix )
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# -----------------------------------------------------------------------------
# Build a single-module program

def simple_build( name, way, extra_hc_opts, should_fail, top_mod, link ):
    errname = add_suffix(name, 'comp.stderr')
    rm_no_fail( errname )
    rm_no_fail( name )
    
    if top_mod != '':
        srcname = top_mod
    else:
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        srcname = add_hs_lhs_suffix(name)
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    to_do = ''
    if top_mod != '':
        to_do = '--make -o ' + name
    elif link:
        to_do = '-o ' + name
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    elif getTestOpts().compile_to_hc:
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        to_do = '-C'
    else:
        to_do = '-c' # just compile


    cmd = 'cd ' + testdir + " && '" \
          + config.compiler + "' " \
          + join(config.compiler_always_flags,' ') + ' ' \
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          + to_do + ' ' + srcname + ' ' \
          + join(config.way_flags[way],' ') + ' ' \
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          + extra_hc_opts + ' ' \
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          + getTestOpts().extra_hc_opts + ' ' \
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          + '>' + errname + ' 2>&1'
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    result = runCmd(cmd)

    if result != 0 and not should_fail:
        actual_stderr = qualify(name, 'comp.stderr')
        if_verbose(1,'Compile failed (status ' + `result` + ') errors were:')
        if_verbose(1,open(actual_stderr).read())

    # ToDo: if the sub-shell was killed by ^C, then exit

    return result

# -----------------------------------------------------------------------------
# Run a program and check its output
#
# If testname.stdin exists, route input from that, else
# from /dev/null.  Route output to testname.run.stdout and 
# testname.run.stderr.  Returns the exit code of the run.

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def simple_run( name, way, prog, args ):
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   # figure out what to use for stdin
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   if getTestOpts().stdin != '':
       use_stdin = getTestOpts().stdin
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   else:
       stdin_file = add_suffix(name, 'stdin')
       if os.path.exists(in_testdir(stdin_file)):
           use_stdin = stdin_file
       else:
           use_stdin = '/dev/null'

   run_stdout = add_suffix(name,'run.stdout')
   run_stderr = add_suffix(name,'run.stderr')

   rm_no_fail(qualify(name,'run.stdout'))
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   rm_no_fail(qualify(name,'run.stderr'))
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   rm_no_fail(qualify(name, 'hp'))
   rm_no_fail(qualify(name,'ps'))
   
   my_rts_flags = rts_flags(way)
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   if getTestOpts().no_stdin:
     stdin_comes_from = ''
   else:
     stdin_comes_from = ' <' + use_stdin
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   cmd = 'cd ' + testdir + ' && ' \
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	  + prog + ' ' + args + ' ' \
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          + my_rts_flags + ' ' \
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          + stdin_comes_from \
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          + ' >' + run_stdout \
          + ' 2>' + run_stderr
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   # run the command
   result = runCmd(cmd)

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   exit_code = result >> 8
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   signal    = result & 0xff

   # check the exit code
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   if exit_code != getTestOpts().exit_code:
       print 'Wrong exit code (expected', getTestOpts().exit_code, ', actual', exit_code, ')'
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       dump_stdout(name)
       dump_stderr(name)
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       return 'fail'

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   check_hp = my_rts_flags.find("-h") != -1

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   if getTestOpts().ignore_output or (check_stderr_ok(name) and
                                      check_stdout_ok(name) and
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                                      (not check_hp or exit_code > 127 or check_hp_ok(name))):
       # exit_code > 127 probably indicates a crash, so don't try to run hp2ps.
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       return 'pass'
   else:
       return 'fail'

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def rts_flags(way):
    if (way == ''):
        return ''
    else:
        args = config.way_rts_flags[way]

    if args == []:
        return ''
    else:
        return '+RTS ' + join(args,' ') + ' -RTS'

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# -----------------------------------------------------------------------------
# Run a program in the interpreter and check its output

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def interpreter_run( name, way, extra_hc_opts, compile_only, top_mod ):
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    outname = add_suffix(name, 'interp.stdout')
    errname = add_suffix(name, 'interp.stderr')
    rm_no_fail(outname)
    rm_no_fail(errname)
    rm_no_fail(name)
    
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    if (top_mod == ''):
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        srcname = add_hs_lhs_suffix(name)
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    else:
        srcname = top_mod
        
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    scriptname = add_suffix(name, 'genscript')
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    qscriptname = in_testdir(scriptname)
    rm_no_fail(qscriptname)

    delimiter = '===== program output begins here\n'

    script = open(qscriptname, 'w')
    if not compile_only:
        # set the prog name and command-line args to match the compiled
        # environment.
        script.write(':set prog ' + name + '\n')
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        script.write(':set args ' + getTestOpts().extra_run_opts + '\n')
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        # Add marker lines to the stdout and stderr output files, so we
        # can separate GHCi's output from the program's.
        script.write(':! echo ' + delimiter)
        script.write(':! echo 1>&2 ' + delimiter)
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        # Set stdout to be line-buffered to match the compiled environment.
        script.write('System.IO.hSetBuffering System.IO.stdout System.IO.LineBuffering\n')
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        # wrapping in GHC.TopHandler.runIO ensures we get the same output
        # in the event of an exception as for the compiled program.
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        script.write('GHC.TopHandler.runIOFastExit Main.main Prelude.>> Prelude.return ()\n')
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    script.close()

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    # figure out what to use for stdin
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    if getTestOpts().stdin != '':
        stdin_file = in_testdir(getTestOpts().stdin)
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    else:
        stdin_file = qualify(name, 'stdin')

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    if os.path.exists(stdin_file):
        stdin = open(stdin_file, 'r')
        os.system('cat ' + stdin_file + ' >>' + qscriptname)
        
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    script.close()

    cmd = 'cd ' + testdir + " && '" \
          + config.compiler + "' " \
          + join(config.compiler_always_flags,' ') + ' ' \
          + srcname + ' ' \
          + join(config.way_flags[way],' ') + ' ' \
          + extra_hc_opts + ' ' \
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          + getTestOpts().extra_hc_opts + ' ' \
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          + '<' + scriptname +  ' 1>' + outname + ' 2>' + errname

    result = runCmd(cmd)

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    exit_code = result >> 8
    signal    = result & 0xff

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    # split the stdout into compilation/program output
    split_file(in_testdir(outname), delimiter,
               qualify(name, 'comp.stdout'),
               qualify(name, 'run.stdout'))
    split_file(in_testdir(errname), delimiter,
               qualify(name, 'comp.stderr'),
               qualify(name, 'run.stderr'))

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    # check the exit code
    if exit_code != getTestOpts().exit_code:
        print 'Wrong exit code (expected', getTestOpts().exit_code, ', actual', exit_code, ')'
        dump_stdout(name)
        dump_stderr(name)
        return 'fail'

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    # ToDo: if the sub-shell was killed by ^C, then exit

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    if getTestOpts().ignore_output or (check_stderr_ok(name) and
                                       check_stdout_ok(name)):
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        return 'pass'
    else:
        return 'fail'


def split_file(in_fn, delimiter, out1_fn, out2_fn):
    infile = open(in_fn)
    out1 = open(out1_fn, 'w')
    out2 = open(out2_fn, 'w')

    line = infile.readline()
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    line = re.sub('\r', '', line) # ignore Windows EOL
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    while (re.sub('^\s*','',line) != delimiter and line != ''):
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        out1.write(line)
        line = infile.readline()
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	line = re.sub('\r', '', line)
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    out1.close()
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    line = infile.readline()
    while (line != ''):
        out2.write(line)
        line = infile.readline()
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    out2.close()
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# -----------------------------------------------------------------------------
# Generate External Core for the given program, then compile the resulting Core
# and compare its output to the expected output

def extcore_run( name, way, extra_hc_opts, compile_only, top_mod ):
 
    depsfilename = qualify(name, 'deps')
    errname = add_suffix(name, 'comp.stderr')
    qerrname = qualify(errname,'')
    
    hcname = qualify(name, 'hc')
    oname = qualify(name, 'o')
    
    rm_no_fail( qerrname )
    rm_no_fail( qualify(name, '') )

    if (top_mod == ''):
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        srcname = add_hs_lhs_suffix(name)
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    else:
        srcname = top_mod

    qcorefilename = qualify(name, 'hcr')
    corefilename = add_suffix(name, 'hcr')
    rm_no_fail(qcorefilename)

    # Generate External Core
    
    if (top_mod == ''):
        to_do = ' ' + srcname + ' '
    else:
        to_do = ' --make ' + top_mod + ' ' 

    cmd = 'cd ' + testdir + " && '" \
          + config.compiler + "' " \
          + join(config.compiler_always_flags,' ') + ' ' \
          + join(config.way_flags[way],' ') + ' ' \
          + extra_hc_opts + ' ' \
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          + getTestOpts().extra_hc_opts \
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          + to_do \
          + '>' + errname + ' 2>&1'
    result = runCmd(cmd)

    exit_code = result >> 8

    if exit_code != 0:
         if_verbose(1,'Compiling to External Core failed (status ' + `result` + ') errors were:')
         if_verbose(1,open(qerrname).read())
         return 'fail'

     # Compile the resulting files -- if there's more than one module, we need to read the output
     # of the previous compilation in order to find the dependencies
    if (top_mod == ''):
        to_compile = corefilename
    else:
        result = runCmd('grep Compiling ' + qerrname + ' |  awk \'{print $4}\' > ' + depsfilename)
        deps = open(depsfilename).read()
        deplist = string.replace(deps, '\n',' ');
        deplist2 = string.replace(deplist,'.lhs,', '.hcr');
        to_compile = string.replace(deplist2,'.hs,', '.hcr');
        
    flags = join(filter(lambda f: f != '-fext-core',config.way_flags[way]),' ')
    
    cmd = 'cd ' + testdir + " && '" \
          + config.compiler + "' " \
          + join(config.compiler_always_flags,' ') + ' ' \
          + to_compile + ' ' \
          + extra_hc_opts + ' ' \
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          + getTestOpts().extra_hc_opts + ' ' \
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          + flags                   \
          + ' -fglasgow-exts -o ' + name \
          + '>' + errname + ' 2>&1'
          
    result = runCmd(cmd)
    exit_code = result >> 8

    if exit_code != 0:
        if_verbose(1,'Compiling External Core file(s) failed (status ' + `result` + ') errors were:')
        if_verbose(1,open(qerrname).read())
        return 'fail'

    # Clean up
    rm_no_fail ( oname )
    rm_no_fail ( hcname )
    rm_no_fail ( qcorefilename )
    rm_no_fail ( depsfilename )
    
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    return simple_run ( name, way, './'+name, getTestOpts().extra_run_opts )
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# -----------------------------------------------------------------------------
# Utils

def check_stdout_ok( name ):
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   if getTestOpts().namebase == None:
       namebase = name
   else:
       namebase = getTestOpts().namebase

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   actual_stdout_file   = qualify(name, 'run.stdout')
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   (platform_specific, expected_stdout_file) = platform_wordsize_qualify(namebase, 'stdout')
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   def norm(str):
      if platform_specific:
         return str
      else:
         return normalise_output(str)
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   return compare_outputs('stdout', norm, id, \
                          expected_stdout_file, actual_stdout_file)
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def dump_stdout( name ):
   print "Stdout:"
   print read_no_crs(qualify(name, 'run.stdout'))

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def check_stderr_ok( name ):
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   if getTestOpts().namebase == None:
       namebase = name
   else:
       namebase = getTestOpts().namebase

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   actual_stderr_file   = qualify(name, 'run.stderr')
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   def norm(str):
      if platform_specific:
         return str
      else:
         return normalise_output(str)
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   return compare_outputs('stderr', norm, id, \
                          expected_stderr_file, actual_stderr_file)
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def dump_stderr( name ):
   print "Stderr:"
   print read_no_crs(qualify(name, 'run.stderr'))

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def read_no_crs(file):
    h = open(file)
    str = h.read()
    h.close
    return re.sub('\r', '', str)
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def write_file(file, str):
    h = open(file, 'w')
    h.write(str)
    h.close
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def check_hp_ok(name):

    # do not qualify for hp2ps because we should be in the right directory
    hp2psCmd = 'cd ' + testdir + ' && ' + config.hp2ps + ' ' + name 

    hp2psResult = runCmdExitCode(hp2psCmd)

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    if config.platform == 'i386-unknown-mingw32':
        actual_ps_file = qualify(name, 'exe.ps')
    else:   
        actual_ps_file = qualify(name, 'ps')
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    if(hp2psResult == 0):
        if (os.path.exists(actual_ps_file)):
            if gs_working:
                gsResult = runCmdExitCode(genGSCmd(actual_ps_file))
                if (gsResult == 0):
                    return (True)
                else:
                    print "hp2ps output for " + name + "is not valid PostScript"
            else: return (True) # assume postscript is valid without ghostscript
        else: 
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            print "hp2ps did not generate PostScript for " + name
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            return (False) 
    else:
        print "hp2ps error when processing heap profile for " + name
        return(False)

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# Compare expected output to actual output, and optionally accept the
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# new output. Returns true if output matched or was accepted, false
# otherwise.
def compare_outputs( kind, normaliser, extra_normaliser,
                     expected_file, actual_file ):
    if os.path.exists(expected_file):
        expected_raw = read_no_crs(expected_file)
        expected_str = normaliser(expected_raw)
    else:
        expected_str = ''
        expected_file = ''
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    actual_raw = read_no_crs(actual_file)
    actual_str = normaliser(actual_raw)
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    if extra_normaliser(expected_str) != extra_normaliser(actual_str):
        print 'Actual ' + kind + ' output differs from expected:'

        if expected_file == '':
            expected_normalised_file = '/dev/null'
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        else:
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            expected_normalised_file = expected_file + ".normalised"
            write_file(expected_normalised_file, expected_str)
        actual_normalised_file = actual_file + ".normalised"
        write_file(actual_normalised_file, actual_str)

        os.system( 'diff -u ' + expected_normalised_file + \
                          ' ' + actual_normalised_file )

        if config.accept:
            if expected_file == '':
                print '*** cannot accept new output: ' + kind + \
                      ' file does not exist.'
                return 0
            else:
                print 'Accepting new output.'
                write_file(expected_file, actual_raw)
                return 1
        return 0
    return 1
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def id(str):
    return str
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def normalise_whitespace( str ):
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    # Merge contiguous whitespace characters into a single space.
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    str = re.sub('[ \t\n]+', ' ', str)
    return str

def normalise_errmsg( str ):
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    # Look for file names and zap the directory part:
    #    foo/var/xyzzy/somefile  -->  somefile
    str = re.sub('([^\\s/]+/)*([^\\s/])', '\\2', str)
    # If somefile ends in ".exe" or ".exe:", zap ".exe" (for Windows)
    #    the colon is there because it appears in error messages; this
    #    hacky solution is used in place of more sophisticated filename
    #    mangling
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    str = re.sub('([^\\s])\\.exe', '\\1', str)
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    return str

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def normalise_output( str ):
    # Remove a .exe extension (for Windows)
    # This can occur in error messages generated by the program.
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    str = re.sub('([^\\s])\\.exe', '\\1', str)
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    return str

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def if_verbose( n, str ):
    if config.verbose >= n:
        print str

# Guess flags suitable for the compiler.
def guess_compiler_flags():
   if config.compiler_type == 'ghc':
       return ['-no-recomp', '-dcore-lint']
   elif config.compiler_type == 'nhc':
       return ['-an-nhc-specific-flag']
   else:
        return []

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def rawSystem(cmd_and_args):
    # We prefer subprocess.call to os.spawnv as the latter
    # seems to send its arguments through a shell or something
    # with the Windows (non-cygwin) python. An argument "a b c"
    # turns into three arguments ["a", "b", "c"].

    # However, subprocess is new in python 2.4, so fall back to
    # using spawnv if we don't have it

    if have_subprocess:
        return subprocess.call(cmd_and_args)
    else:
        return os.spawnv(os.P_WAIT, cmd_and_args[0], cmd_and_args)

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# cmd is a complex command in Bourne-shell syntax 
# e.g (cd . && 'c:/users/simonpj/darcs/HEAD/compiler/stage1/ghc-inplace' ...etc)
# Hence it must ultimately be run by a Bourne shell
# 
# Mostly it invokes the command wrapped in 'timeout' thus
#	timeout 300 'cd . && ...blah blah'
# so it's timeout's job to invoke the Bourne shell
#
# But watch out for the case when there is no timeout program!
# Then, when using the native Python, os.system will invoke the cmd shell

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def runCmd( cmd ):
    if_verbose( 1, cmd )
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    r = 0
    if config.platform == 'i386-unknown-mingw32':
	# On MinGW, we will always have timeout
        assert config.timeout_prog!=''
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    if config.timeout_prog != '':
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        r = rawSystem([config.timeout_prog, str(config.timeout), cmd])
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    else:
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        r = os.system(cmd)
    return r << 8
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def runCmdExitCode( cmd ):
    return (runCmd(cmd) >> 8);


# -----------------------------------------------------------------------------
# checking if ghostscript is available for checking the output of hp2ps

def genGSCmd(psfile):
    return (config.gs + ' -dNODISPLAY -dBATCH -dQUIET -dNOPAUSE ' + psfile);

def gsNotWorking():
    global gs_working 
    print "GhostScript not available for hp2ps tests"
    gs_working = 0;

global gs_working
if config.gs != '':
    resultGood = runCmdExitCode(genGSCmd(config.confdir + '/good.ps'));
    if resultGood == 0:
        resultBad = runCmdExitCode(genGSCmd(config.confdir + '/bad.ps'));
        if resultBad != 0:
            print "GhostScript available for hp2ps tests"
            gs_working = 1;
        else:
            gsNotWorking();
    else:
        gsNotWorking();
else:
    gsNotWorking();

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def rm_no_fail( file ):
   try:
       os.remove( file )    
   finally:
       return

def add_suffix( name, suffix ):
    if suffix == '':
        return name
    else:
        return name + '.' + suffix    

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def add_hs_lhs_suffix(name):
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    if getTestOpts().c_src:
        return add_suffix(name, 'c')
    elif getTestOpts().literate:
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        return add_suffix(name, 'lhs')
    else:
        return add_suffix(name, 'hs')

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def in_testdir( name ):
    return os.path.join(testdir, name)

def qualify( name, suff ):
    return in_testdir(add_suffix(name, suff))

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# try qualify("foo-compiler_type"), qualify("foo-ws-wordsize")
# or finally qualify("foo")
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def platform_wordsize_qualify( name, suff ):
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    path = qualify(name, suff)
    platform_path = path + '-' + config.platform
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    compiler_type_path = path + '-' + config.compiler_type
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    wordsize_path = path + '-ws-' + config.wordsize
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    if os.path.exists(platform_path):
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        return (1,platform_path)
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    elif os.path.exists(compiler_type_path):
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        return (0,compiler_type_path)
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    elif os.path.exists(wordsize_path):
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        return (0,wordsize_path)
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    else:
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        return (0,path)
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# Clean up prior to the test, so that we can't spuriously conclude
# that it passed on the basis of old run outputs.
def pretest_cleanup(name):
   rm_no_fail(qualify(name,'comp.stderr'))
   rm_no_fail(qualify(name,'run.stderr'))
   rm_no_fail(qualify(name,'run.stdout'))
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   rm_no_fail(qualify(name,'tix'))	# remove the old tix file
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   # simple_build zaps the following:
   # rm_nofail(qualify("o"))
   # rm_nofail(qualify(""))
   # not interested in the return code

# -----------------------------------------------------------------------------
# Return a list of all the files ending in '.T' below the directory dir.

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def findTFiles(roots):
    return concat(map(findTFiles_,roots))

def findTFiles_(path):    
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    if os.path.isdir(path):
        paths = map(lambda x, p=path: p + '/' + x, os.listdir(path))
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        return findTFiles(paths)
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    elif path[-2:] == '.T':
        return [path]
    else:
        return []

# -----------------------------------------------------------------------------
# Output a test summary to the specified file object

def summary(t, file):
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    file.write('\n')
    file.write('OVERALL SUMMARY for test run started at ' \
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               + t.start_time + '\n'\
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               + string.rjust(`t.total_tests`, 8) \
               + ' total tests, which gave rise to\n' \
               + string.rjust(`t.total_test_cases`, 8) \
               + ' test cases, of which\n' \
               + string.rjust(`t.n_framework_failures`, 8) \
               + ' caused framework failures\n' \
               + string.rjust(`t.n_tests_skipped`, 8)
               + ' were skipped\n\n' \
               + string.rjust(`t.n_expected_passes`, 8)
               + ' expected passes\n' \
               + string.rjust(`t.n_expected_failures`, 8) \
               + ' expected failures\n' \
               + string.rjust(`t.n_unexpected_passes`, 8) \
               + ' unexpected passes\n'
               + string.rjust(`t.n_unexpected_failures`, 8) \
               + ' unexpected failures\n'
               + '\n')

    if t.n_unexpected_passes > 0:
        file.write('Unexpected passes:\n')
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        keys = t.unexpected_passes.keys()
        keys.sort()
        for test in keys:
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            file.write('   ' + test + '(' + \
                       join(t.unexpected_passes[test],',') + ')\n')
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        file.write('\n')
            
    if t.n_unexpected_failures > 0:
        file.write('Unexpected failures:\n')
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        keys = t.unexpected_failures.keys()
        keys.sort()
        for test in keys:
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            file.write('   ' + test + '(' + \
                       join(t.unexpected_failures[test],',') + ')\n')
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        file.write('\n')