Split openFileForWrite into windows and unix versions.
It is similar to 186511, but for creating files for writing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186679 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Object/archive-extract-dir.test b/test/Object/archive-extract-dir.test
new file mode 100644
index 0000000..c718f90
--- /dev/null
+++ b/test/Object/archive-extract-dir.test
@@ -0,0 +1,13 @@
+REQUIRES: shell
+
+RUN: mkdir -p %t
+RUN: cd %t
+RUN: rm -rf foo
+RUN: echo foo > foo
+RUN: rm -f test.a
+RUN: llvm-ar rc test.a foo
+RUN: rm foo
+RUN: mkdir foo
+RUN: not llvm-ar x test.a foo 2>&1 | FileCheck %s
+
+CHECK: foo: Is a directory