clang-format: Use pipes instead of temporary files for most lit tests.

This makes the format tests look more like most other FileCheck tests in clang.

The multiple-inputs tests still use temp files, to make sure that the file
input code in clang-format stays tested.

Stop stripping out the comment lines in style-on-command-line.cpp as they don't
get in the way and it makes the test simpler. Also remove 2>&1s on the tests in
that file that don't need it.

http://reviews.llvm.org/D13852

llvm-svn: 250706

1 files changed, 6 insertions, 4 deletions

diff --git a/clang/test/Format/language-detection.cpp b/clang/test/Format/language-detection.cpp
index bec444dc9dd..2a53be71daf 100644
--- a/clang/test/Format/language-detection.cpp
+++ b/clang/test/Format/language-detection.cpp
@@ -1,7 +1,9 @@
-// RUN: grep -Ev "// *[A-Z0-9_]+:" %s > %t.js
-// RUN: grep -Ev "// *[A-Z0-9_]+:" %s > %t.cpp
-// RUN: clang-format -style=llvm %t.js | FileCheck -strict-whitespace -check-prefix=CHECK1 %s
-// RUN: clang-format -style=llvm %t.cpp | FileCheck -strict-whitespace -check-prefix=CHECK2 %s
+// RUN: grep -Ev "// *[A-Z0-9_]+:" %s \
+// RUN:   | clang-format -style=llvm -assume-filename=foo.js \
+// RUN:   | FileCheck -strict-whitespace -check-prefix=CHECK1 %s
+// RUN: grep -Ev "// *[A-Z0-9_]+:" %s \
+// RUN:   | clang-format -style=llvm -assume-filename=foo.cpp \
+// RUN:   | FileCheck -strict-whitespace -check-prefix=CHECK2 %s
 // CHECK1: {{^a >>>= b;$}}
 // CHECK2: {{^a >> >= b;$}}
 a >>>= b;