clang/unittests/Tooling/RewriterTest.cpp

   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