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[Support] Ensure redirected outputs don't contain output from previous tests.

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stdout may be buffered, and may not flush on every write. Explicitly flushing
before redirecting the output ensures that the captured output does not contain
output from other tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@360617 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David L. Jones 2019-05-13 20:32:53 +00:00
parent 1d1646072b
commit d6664e77e7
1 changed files with 1 additions and 0 deletions
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1
unittests/Support/CommandLineTest.cpp
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@ -1085,6 +1085,7 @@ public:
// Return std::string because the output of a failing EXPECT check is // Return std::string because the output of a failing EXPECT check is
// unreadable for StringRef. It also avoids any lifetime issues. // unreadable for StringRef. It also avoids any lifetime issues.
template <typename... Ts> std::string runTest(Ts... OptionAttributes) { template <typename... Ts> std::string runTest(Ts... OptionAttributes) {
outs().flush(); // flush any output from previous tests
AutoDeleteFile File; AutoDeleteFile File;
{ {
OutputRedirector Stdout(fileno(stdout)); OutputRedirector Stdout(fileno(stdout));