1 //===- unittest/Tooling/RewriterTest.cpp ----------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "RewriterTestContext.h"
10 #include "clang/Tooling/Core/Replacement.h"
11 #include "gtest/gtest.h"
12 
13 namespace clang {
14 namespace tooling {
15 namespace {
16 
17 TEST(Rewriter, OverwritesChangedFiles) {
18   RewriterTestContext Context;
19   FileID ID = Context.createOnDiskFile("t.cpp", "line1\nline2\nline3\nline4");
20   Context.Rewrite.ReplaceText(Context.getLocation(ID, 2, 1), 5, "replaced");
21   EXPECT_FALSE(Context.Rewrite.overwriteChangedFiles());
22   EXPECT_EQ("line1\nreplaced\nline3\nline4",
23             Context.getFileContentFromDisk("t.cpp"));
24 }
25 
26 TEST(Rewriter, ContinuesOverwritingFilesOnError) {
27   RewriterTestContext Context;
28   FileID FailingID = Context.createInMemoryFile("invalid/failing.cpp", "test");
29   Context.Rewrite.ReplaceText(Context.getLocation(FailingID, 1, 2), 1, "other");
30   FileID WorkingID = Context.createOnDiskFile(
31     "working.cpp", "line1\nline2\nline3\nline4");
32   Context.Rewrite.ReplaceText(Context.getLocation(WorkingID, 2, 1), 5,
33                               "replaced");
34   EXPECT_TRUE(Context.Rewrite.overwriteChangedFiles());
35   EXPECT_EQ("line1\nreplaced\nline3\nline4",
36             Context.getFileContentFromDisk("working.cpp"));
37 }
38 
39 TEST(Rewriter, AdjacentInsertAndDelete) {
40   Replacements Replaces;
41   auto Err = Replaces.add(Replacement("<file>", 6, 6, ""));
42   EXPECT_TRUE(!Err);
43   Replaces =
44       Replaces.merge(Replacements(Replacement("<file>", 6, 0, "replaced\n")));
45 
46   auto Rewritten = applyAllReplacements("line1\nline2\nline3\nline4", Replaces);
47   EXPECT_TRUE(static_cast<bool>(Rewritten));
48   EXPECT_EQ("line1\nreplaced\nline3\nline4", *Rewritten);
49 }
50 
51 } // end namespace
52 } // end namespace tooling
53 } // end namespace clang
54