462 lines
18 KiB
C++
462 lines
18 KiB
C++
//===- unittest/Tooling/RefactoringTest.cpp - Refactoring unit tests ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "RewriterTestContext.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclGroup.h"
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#include "clang/AST/RecursiveASTVisitor.h"
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/DiagnosticOptions.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/FrontendAction.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/Rewrite/Core/Rewriter.h"
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#include "clang/Tooling/Refactoring.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/Path.h"
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#include "gtest/gtest.h"
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namespace clang {
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namespace tooling {
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class ReplacementTest : public ::testing::Test {
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protected:
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Replacement createReplacement(SourceLocation Start, unsigned Length,
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llvm::StringRef ReplacementText) {
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return Replacement(Context.Sources, Start, Length, ReplacementText);
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}
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RewriterTestContext Context;
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};
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TEST_F(ReplacementTest, CanDeleteAllText) {
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FileID ID = Context.createInMemoryFile("input.cpp", "text");
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SourceLocation Location = Context.getLocation(ID, 1, 1);
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Replacement Replace(createReplacement(Location, 4, ""));
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EXPECT_TRUE(Replace.apply(Context.Rewrite));
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EXPECT_EQ("", Context.getRewrittenText(ID));
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}
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TEST_F(ReplacementTest, CanDeleteAllTextInTextWithNewlines) {
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FileID ID = Context.createInMemoryFile("input.cpp", "line1\nline2\nline3");
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SourceLocation Location = Context.getLocation(ID, 1, 1);
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Replacement Replace(createReplacement(Location, 17, ""));
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EXPECT_TRUE(Replace.apply(Context.Rewrite));
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EXPECT_EQ("", Context.getRewrittenText(ID));
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}
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TEST_F(ReplacementTest, CanAddText) {
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FileID ID = Context.createInMemoryFile("input.cpp", "");
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SourceLocation Location = Context.getLocation(ID, 1, 1);
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Replacement Replace(createReplacement(Location, 0, "result"));
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EXPECT_TRUE(Replace.apply(Context.Rewrite));
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EXPECT_EQ("result", Context.getRewrittenText(ID));
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}
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TEST_F(ReplacementTest, CanReplaceTextAtPosition) {
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FileID ID = Context.createInMemoryFile("input.cpp",
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"line1\nline2\nline3\nline4");
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SourceLocation Location = Context.getLocation(ID, 2, 3);
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Replacement Replace(createReplacement(Location, 12, "x"));
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EXPECT_TRUE(Replace.apply(Context.Rewrite));
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EXPECT_EQ("line1\nlixne4", Context.getRewrittenText(ID));
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}
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TEST_F(ReplacementTest, CanReplaceTextAtPositionMultipleTimes) {
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FileID ID = Context.createInMemoryFile("input.cpp",
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"line1\nline2\nline3\nline4");
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SourceLocation Location1 = Context.getLocation(ID, 2, 3);
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Replacement Replace1(createReplacement(Location1, 12, "x\ny\n"));
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EXPECT_TRUE(Replace1.apply(Context.Rewrite));
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EXPECT_EQ("line1\nlix\ny\nne4", Context.getRewrittenText(ID));
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// Since the original source has not been modified, the (4, 4) points to the
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// 'e' in the original content.
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SourceLocation Location2 = Context.getLocation(ID, 4, 4);
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Replacement Replace2(createReplacement(Location2, 1, "f"));
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EXPECT_TRUE(Replace2.apply(Context.Rewrite));
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EXPECT_EQ("line1\nlix\ny\nnf4", Context.getRewrittenText(ID));
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}
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TEST_F(ReplacementTest, ApplyFailsForNonExistentLocation) {
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Replacement Replace("nonexistent-file.cpp", 0, 1, "");
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EXPECT_FALSE(Replace.apply(Context.Rewrite));
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}
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TEST_F(ReplacementTest, CanRetrivePath) {
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Replacement Replace("/path/to/file.cpp", 0, 1, "");
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EXPECT_EQ("/path/to/file.cpp", Replace.getFilePath());
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}
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TEST_F(ReplacementTest, ReturnsInvalidPath) {
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Replacement Replace1(Context.Sources, SourceLocation(), 0, "");
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EXPECT_TRUE(Replace1.getFilePath().empty());
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Replacement Replace2;
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EXPECT_TRUE(Replace2.getFilePath().empty());
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}
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TEST_F(ReplacementTest, CanApplyReplacements) {
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FileID ID = Context.createInMemoryFile("input.cpp",
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"line1\nline2\nline3\nline4");
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Replacements Replaces;
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Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
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5, "replaced"));
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Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 3, 1),
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5, "other"));
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EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
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EXPECT_EQ("line1\nreplaced\nother\nline4", Context.getRewrittenText(ID));
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}
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// FIXME: Remove this test case when Replacements is implemented as std::vector
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// instead of std::set. The other ReplacementTest tests will need to be updated
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// at that point as well.
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TEST_F(ReplacementTest, VectorCanApplyReplacements) {
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FileID ID = Context.createInMemoryFile("input.cpp",
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"line1\nline2\nline3\nline4");
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std::vector<Replacement> Replaces;
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Replaces.push_back(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
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5, "replaced"));
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Replaces.push_back(
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Replacement(Context.Sources, Context.getLocation(ID, 3, 1), 5, "other"));
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EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
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EXPECT_EQ("line1\nreplaced\nother\nline4", Context.getRewrittenText(ID));
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}
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TEST_F(ReplacementTest, SkipsDuplicateReplacements) {
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FileID ID = Context.createInMemoryFile("input.cpp",
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"line1\nline2\nline3\nline4");
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Replacements Replaces;
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Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
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5, "replaced"));
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Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
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5, "replaced"));
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Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
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5, "replaced"));
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EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
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EXPECT_EQ("line1\nreplaced\nline3\nline4", Context.getRewrittenText(ID));
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}
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TEST_F(ReplacementTest, ApplyAllFailsIfOneApplyFails) {
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// This test depends on the value of the file name of an invalid source
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// location being in the range ]a, z[.
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FileID IDa = Context.createInMemoryFile("a.cpp", "text");
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FileID IDz = Context.createInMemoryFile("z.cpp", "text");
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Replacements Replaces;
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Replaces.insert(Replacement(Context.Sources, Context.getLocation(IDa, 1, 1),
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4, "a"));
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Replaces.insert(Replacement(Context.Sources, SourceLocation(),
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5, "2"));
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Replaces.insert(Replacement(Context.Sources, Context.getLocation(IDz, 1, 1),
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4, "z"));
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EXPECT_FALSE(applyAllReplacements(Replaces, Context.Rewrite));
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EXPECT_EQ("a", Context.getRewrittenText(IDa));
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EXPECT_EQ("z", Context.getRewrittenText(IDz));
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}
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TEST(ShiftedCodePositionTest, FindsNewCodePosition) {
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Replacements Replaces;
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Replaces.insert(Replacement("", 0, 1, ""));
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Replaces.insert(Replacement("", 4, 3, " "));
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// Assume ' int i;' is turned into 'int i;' and cursor is located at '|'.
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EXPECT_EQ(0u, shiftedCodePosition(Replaces, 0)); // |int i;
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EXPECT_EQ(0u, shiftedCodePosition(Replaces, 1)); // |nt i;
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EXPECT_EQ(1u, shiftedCodePosition(Replaces, 2)); // i|t i;
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EXPECT_EQ(2u, shiftedCodePosition(Replaces, 3)); // in| i;
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EXPECT_EQ(3u, shiftedCodePosition(Replaces, 4)); // int| i;
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EXPECT_EQ(4u, shiftedCodePosition(Replaces, 5)); // int | i;
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EXPECT_EQ(4u, shiftedCodePosition(Replaces, 6)); // int |i;
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EXPECT_EQ(4u, shiftedCodePosition(Replaces, 7)); // int |;
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EXPECT_EQ(5u, shiftedCodePosition(Replaces, 8)); // int i|
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}
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// FIXME: Remove this test case when Replacements is implemented as std::vector
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// instead of std::set. The other ReplacementTest tests will need to be updated
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// at that point as well.
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TEST(ShiftedCodePositionTest, VectorFindsNewCodePositionWithInserts) {
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std::vector<Replacement> Replaces;
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Replaces.push_back(Replacement("", 0, 1, ""));
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Replaces.push_back(Replacement("", 4, 3, " "));
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// Assume ' int i;' is turned into 'int i;' and cursor is located at '|'.
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EXPECT_EQ(0u, shiftedCodePosition(Replaces, 0)); // |int i;
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EXPECT_EQ(0u, shiftedCodePosition(Replaces, 1)); // |nt i;
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EXPECT_EQ(1u, shiftedCodePosition(Replaces, 2)); // i|t i;
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EXPECT_EQ(2u, shiftedCodePosition(Replaces, 3)); // in| i;
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EXPECT_EQ(3u, shiftedCodePosition(Replaces, 4)); // int| i;
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EXPECT_EQ(4u, shiftedCodePosition(Replaces, 5)); // int | i;
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EXPECT_EQ(4u, shiftedCodePosition(Replaces, 6)); // int |i;
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EXPECT_EQ(4u, shiftedCodePosition(Replaces, 7)); // int |;
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EXPECT_EQ(5u, shiftedCodePosition(Replaces, 8)); // int i|
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}
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TEST(ShiftedCodePositionTest, FindsNewCodePositionWithInserts) {
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Replacements Replaces;
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Replaces.insert(Replacement("", 4, 0, "\"\n\""));
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// Assume '"12345678"' is turned into '"1234"\n"5678"'.
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EXPECT_EQ(4u, shiftedCodePosition(Replaces, 4)); // "123|5678"
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EXPECT_EQ(8u, shiftedCodePosition(Replaces, 5)); // "1234|678"
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}
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class FlushRewrittenFilesTest : public ::testing::Test {
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public:
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FlushRewrittenFilesTest() {}
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~FlushRewrittenFilesTest() {
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for (llvm::StringMap<std::string>::iterator I = TemporaryFiles.begin(),
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E = TemporaryFiles.end();
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I != E; ++I) {
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llvm::StringRef Name = I->second;
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llvm::error_code EC = llvm::sys::fs::remove(Name);
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(void)EC;
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assert(!EC);
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}
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}
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FileID createFile(llvm::StringRef Name, llvm::StringRef Content) {
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SmallString<1024> Path;
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int FD;
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llvm::error_code EC =
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llvm::sys::fs::createTemporaryFile(Name, "", FD, Path);
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assert(!EC);
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(void)EC;
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llvm::raw_fd_ostream OutStream(FD, true);
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OutStream << Content;
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OutStream.close();
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const FileEntry *File = Context.Files.getFile(Path);
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assert(File != NULL);
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StringRef Found = TemporaryFiles.GetOrCreateValue(Name, Path.str()).second;
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assert(Found == Path);
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(void)Found;
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return Context.Sources.createFileID(File, SourceLocation(), SrcMgr::C_User);
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}
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std::string getFileContentFromDisk(llvm::StringRef Name) {
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std::string Path = TemporaryFiles.lookup(Name);
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assert(!Path.empty());
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// We need to read directly from the FileManager without relaying through
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// a FileEntry, as otherwise we'd read through an already opened file
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// descriptor, which might not see the changes made.
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// FIXME: Figure out whether there is a way to get the SourceManger to
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// reopen the file.
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return Context.Files.getBufferForFile(Path, NULL)->getBuffer();
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}
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llvm::StringMap<std::string> TemporaryFiles;
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RewriterTestContext Context;
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};
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TEST_F(FlushRewrittenFilesTest, StoresChangesOnDisk) {
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FileID ID = createFile("input.cpp", "line1\nline2\nline3\nline4");
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Replacements Replaces;
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Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
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5, "replaced"));
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EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
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EXPECT_FALSE(Context.Rewrite.overwriteChangedFiles());
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EXPECT_EQ("line1\nreplaced\nline3\nline4",
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getFileContentFromDisk("input.cpp"));
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}
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namespace {
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template <typename T>
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class TestVisitor : public clang::RecursiveASTVisitor<T> {
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public:
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bool runOver(StringRef Code) {
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return runToolOnCode(new TestAction(this), Code);
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}
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protected:
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clang::SourceManager *SM;
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private:
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class FindConsumer : public clang::ASTConsumer {
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public:
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FindConsumer(TestVisitor *Visitor) : Visitor(Visitor) {}
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virtual void HandleTranslationUnit(clang::ASTContext &Context) {
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Visitor->TraverseDecl(Context.getTranslationUnitDecl());
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}
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private:
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TestVisitor *Visitor;
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};
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class TestAction : public clang::ASTFrontendAction {
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public:
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TestAction(TestVisitor *Visitor) : Visitor(Visitor) {}
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virtual clang::ASTConsumer* CreateASTConsumer(
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clang::CompilerInstance& compiler, llvm::StringRef dummy) {
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Visitor->SM = &compiler.getSourceManager();
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/// TestConsumer will be deleted by the framework calling us.
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return new FindConsumer(Visitor);
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}
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private:
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TestVisitor *Visitor;
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};
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};
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} // end namespace
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void expectReplacementAt(const Replacement &Replace,
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StringRef File, unsigned Offset, unsigned Length) {
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ASSERT_TRUE(Replace.isApplicable());
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EXPECT_EQ(File, Replace.getFilePath());
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EXPECT_EQ(Offset, Replace.getOffset());
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EXPECT_EQ(Length, Replace.getLength());
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}
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class ClassDeclXVisitor : public TestVisitor<ClassDeclXVisitor> {
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public:
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bool VisitCXXRecordDecl(CXXRecordDecl *Record) {
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if (Record->getName() == "X") {
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Replace = Replacement(*SM, Record, "");
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}
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return true;
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}
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Replacement Replace;
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};
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TEST(Replacement, CanBeConstructedFromNode) {
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ClassDeclXVisitor ClassDeclX;
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EXPECT_TRUE(ClassDeclX.runOver(" class X;"));
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expectReplacementAt(ClassDeclX.Replace, "input.cc", 5, 7);
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}
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TEST(Replacement, ReplacesAtSpellingLocation) {
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ClassDeclXVisitor ClassDeclX;
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EXPECT_TRUE(ClassDeclX.runOver("#define A(Y) Y\nA(class X);"));
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expectReplacementAt(ClassDeclX.Replace, "input.cc", 17, 7);
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}
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class CallToFVisitor : public TestVisitor<CallToFVisitor> {
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public:
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bool VisitCallExpr(CallExpr *Call) {
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if (Call->getDirectCallee()->getName() == "F") {
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Replace = Replacement(*SM, Call, "");
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}
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return true;
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}
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Replacement Replace;
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};
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TEST(Replacement, FunctionCall) {
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CallToFVisitor CallToF;
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EXPECT_TRUE(CallToF.runOver("void F(); void G() { F(); }"));
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expectReplacementAt(CallToF.Replace, "input.cc", 21, 3);
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}
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TEST(Replacement, TemplatedFunctionCall) {
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CallToFVisitor CallToF;
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EXPECT_TRUE(CallToF.runOver(
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"template <typename T> void F(); void G() { F<int>(); }"));
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expectReplacementAt(CallToF.Replace, "input.cc", 43, 8);
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}
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TEST(Range, overlaps) {
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EXPECT_TRUE(Range(10, 10).overlapsWith(Range(0, 11)));
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EXPECT_TRUE(Range(0, 11).overlapsWith(Range(10, 10)));
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EXPECT_FALSE(Range(10, 10).overlapsWith(Range(0, 10)));
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EXPECT_FALSE(Range(0, 10).overlapsWith(Range(10, 10)));
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EXPECT_TRUE(Range(0, 10).overlapsWith(Range(2, 6)));
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EXPECT_TRUE(Range(2, 6).overlapsWith(Range(0, 10)));
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}
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TEST(Range, contains) {
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EXPECT_TRUE(Range(0, 10).contains(Range(0, 10)));
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EXPECT_TRUE(Range(0, 10).contains(Range(2, 6)));
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EXPECT_FALSE(Range(2, 6).contains(Range(0, 10)));
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EXPECT_FALSE(Range(0, 10).contains(Range(0, 11)));
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}
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TEST(DeduplicateTest, removesDuplicates) {
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std::vector<Replacement> Input;
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Input.push_back(Replacement("fileA", 50, 0, " foo "));
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Input.push_back(Replacement("fileA", 10, 3, " bar "));
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Input.push_back(Replacement("fileA", 10, 2, " bar ")); // Length differs
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Input.push_back(Replacement("fileA", 9, 3, " bar ")); // Offset differs
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Input.push_back(Replacement("fileA", 50, 0, " foo ")); // Duplicate
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Input.push_back(Replacement("fileA", 51, 3, " bar "));
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Input.push_back(Replacement("fileB", 51, 3, " bar ")); // Filename differs!
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Input.push_back(Replacement("fileA", 51, 3, " moo ")); // Replacement text
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// differs!
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std::vector<Replacement> Expected;
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Expected.push_back(Replacement("fileA", 9, 3, " bar "));
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Expected.push_back(Replacement("fileA", 10, 2, " bar "));
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Expected.push_back(Replacement("fileA", 10, 3, " bar "));
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Expected.push_back(Replacement("fileA", 50, 0, " foo "));
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Expected.push_back(Replacement("fileA", 51, 3, " bar "));
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Expected.push_back(Replacement("fileA", 51, 3, " moo "));
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Expected.push_back(Replacement("fileB", 51, 3, " bar "));
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std::vector<Range> Conflicts; // Ignored for this test
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deduplicate(Input, Conflicts);
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ASSERT_TRUE(Expected == Input);
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}
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TEST(DeduplicateTest, detectsConflicts) {
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{
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std::vector<Replacement> Input;
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Input.push_back(Replacement("fileA", 0, 5, " foo "));
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Input.push_back(Replacement("fileA", 0, 5, " foo ")); // Duplicate not a
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// conflict.
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Input.push_back(Replacement("fileA", 2, 6, " bar "));
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Input.push_back(Replacement("fileA", 7, 3, " moo "));
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std::vector<Range> Conflicts;
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deduplicate(Input, Conflicts);
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// One duplicate is removed and the remaining three items form one
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// conflicted range.
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ASSERT_EQ(3u, Input.size());
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ASSERT_EQ(1u, Conflicts.size());
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ASSERT_EQ(0u, Conflicts.front().getOffset());
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ASSERT_EQ(3u, Conflicts.front().getLength());
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}
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{
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std::vector<Replacement> Input;
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// Expected sorted order is shown. It is the sorted order to which the
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// returned conflict info refers to.
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Input.push_back(Replacement("fileA", 0, 5, " foo ")); // 0
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Input.push_back(Replacement("fileA", 5, 5, " bar ")); // 1
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Input.push_back(Replacement("fileA", 6, 0, " bar ")); // 3
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Input.push_back(Replacement("fileA", 5, 5, " moo ")); // 2
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Input.push_back(Replacement("fileA", 7, 2, " bar ")); // 4
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Input.push_back(Replacement("fileA", 15, 5, " golf ")); // 5
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Input.push_back(Replacement("fileA", 16, 5, " bag ")); // 6
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Input.push_back(Replacement("fileA", 10, 3, " club ")); // 7
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// #3 is special in that it is completely contained by another conflicting
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// Replacement. #4 ensures #3 hasn't messed up the conflicting range size.
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std::vector<Range> Conflicts;
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deduplicate(Input, Conflicts);
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// No duplicates
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ASSERT_EQ(8u, Input.size());
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ASSERT_EQ(2u, Conflicts.size());
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ASSERT_EQ(1u, Conflicts[0].getOffset());
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ASSERT_EQ(4u, Conflicts[0].getLength());
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ASSERT_EQ(6u, Conflicts[1].getOffset());
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ASSERT_EQ(2u, Conflicts[1].getLength());
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}
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}
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} // end namespace tooling
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} // end namespace clang
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