1 files changed, 37 insertions, 0 deletions
diff --git a/unittests/Tooling/RewriterTest.cpp b/unittests/Tooling/RewriterTest.cpp
new file mode 100644
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+++ b/unittests/Tooling/RewriterTest.cpp
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+//===- unittest/Tooling/RewriterTest.cpp ----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "RewriterTestContext.h"
+#include "gtest/gtest.h"
+
+namespace clang {
+
+TEST(Rewriter, OverwritesChangedFiles) {
+  RewriterTestContext Context;
+  FileID ID = Context.createOnDiskFile("t.cpp", "line1\nline2\nline3\nline4");
+  Context.Rewrite.ReplaceText(Context.getLocation(ID, 2, 1), 5, "replaced");
+  EXPECT_FALSE(Context.Rewrite.overwriteChangedFiles());
+  EXPECT_EQ("line1\nreplaced\nline3\nline4",
+            Context.getFileContentFromDisk("t.cpp")); 
+}
+
+TEST(Rewriter, ContinuesOverwritingFilesOnError) {
+  RewriterTestContext Context;
+  FileID FailingID = Context.createInMemoryFile("invalid/failing.cpp", "test");
+  Context.Rewrite.ReplaceText(Context.getLocation(FailingID, 1, 2), 1, "other");
+  FileID WorkingID = Context.createOnDiskFile(
+    "working.cpp", "line1\nline2\nline3\nline4");
+  Context.Rewrite.ReplaceText(Context.getLocation(WorkingID, 2, 1), 5,
+                              "replaced");
+  EXPECT_TRUE(Context.Rewrite.overwriteChangedFiles());
+  EXPECT_EQ("line1\nreplaced\nline3\nline4",
+            Context.getFileContentFromDisk("working.cpp")); 
+}
+
+} // end namespace clang