Add a test for reloading a module in GHCi

testsuite/tests/ghci/scripts/all.T

@@ -131,3 +131,8 @@ test('T6091', normal, ghci_script, ['T6091.script'])
 test('T6106', extra_clean(['T6106.hs']), ghci_script, ['T6106.script'])
 test('T6105', normal, ghci_script, ['T6105.script'])
 test('T7117', normal, ghci_script, ['T7117.script'])
+test('ghci058',
+     extra_clean(['Ghci058.hs', 'Ghci058.hi', 'Ghci058.o']),
+     ghci_script,
+     ['ghci058.script'])
+

testsuite/tests/ghci/scripts/ghci058.script

+
+:set prompt ""
+:set -v1
+
+:! echo "module Ghci058 where c = 'a'" > Ghci058.hs
+:! "$HC" $HC_OPTS -fforce-recomp -c Ghci058.hs
+:l Ghci058
+c
+
+:! echo "module Ghci058 where c = 'b'" > Ghci058.hs
+:! "$HC" $HC_OPTS -fforce-recomp -c Ghci058.hs
+:l Ghci058
+c
+

testsuite/tests/ghci/scripts/ghci058.stdout

+Ok, modules loaded: Ghci058.
+'a'
+Ok, modules loaded: Ghci058.
+'b'