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authorDavid Terei <davidterei@gmail.com>2011-07-20 11:09:03 -0700
committerDavid Terei <davidterei@gmail.com>2011-07-20 11:26:35 -0700
commit16514f272fb42af6e9c7674a9bd6c9dce369231f (patch)
treee4f332b45fe65e2a7a2451be5674f887b42bf199 /testsuite/tests/lib/IO/openFile007.hs
parentebd422aed41048476aa61dd4c520d43becd78682 (diff)
downloadhaskell-16514f272fb42af6e9c7674a9bd6c9dce369231f.tar.gz
Move tests from tests/ghc-regress/* to just tests/*
Diffstat (limited to 'testsuite/tests/lib/IO/openFile007.hs')
-rw-r--r--testsuite/tests/lib/IO/openFile007.hs18
1 files changed, 18 insertions, 0 deletions
diff --git a/testsuite/tests/lib/IO/openFile007.hs b/testsuite/tests/lib/IO/openFile007.hs
new file mode 100644
index 0000000000..e39ed6538f
--- /dev/null
+++ b/testsuite/tests/lib/IO/openFile007.hs
@@ -0,0 +1,18 @@
+-- !!! check that we don't truncate files if the open fails
+
+import Control.Monad
+import System.IO
+import System.IO.Error
+
+tmp = "openFile007.out"
+
+main = do
+ h <- openFile tmp WriteMode
+ hPutStrLn h "hello, world"
+
+ -- second open in write mode better fail, but better not truncate the file
+ tryIOError (openFile tmp WriteMode) >>= print
+
+ hClose h
+ s <- readFile tmp -- make sure our "hello, world" is still there
+ putStr s