RefactoringCallbacksTest.cpp revision 651f13cea278ec967336033dd032faef0e9fc2ec 
1//===- unittest/Tooling/RefactoringCallbacksTest.cpp ----------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "clang/Tooling/RefactoringCallbacks.h"
11#include "RewriterTestContext.h"
12#include "clang/ASTMatchers/ASTMatchFinder.h"
13#include "clang/ASTMatchers/ASTMatchers.h"
14#include "gtest/gtest.h"
15
16namespace clang {
17namespace tooling {
18
19using namespace ast_matchers;
20
21template <typename T>
22void expectRewritten(const std::string &Code,
23                     const std::string &Expected,
24                     const T &AMatcher,
25                     RefactoringCallback &Callback) {
26  MatchFinder Finder;
27  Finder.addMatcher(AMatcher, &Callback);
28  std::unique_ptr<tooling::FrontendActionFactory> Factory(
29      tooling::newFrontendActionFactory(&Finder));
30  ASSERT_TRUE(tooling::runToolOnCode(Factory->create(), Code))
31      << "Parsing error in \"" << Code << "\"";
32  RewriterTestContext Context;
33  FileID ID = Context.createInMemoryFile("input.cc", Code);
34  EXPECT_TRUE(tooling::applyAllReplacements(Callback.getReplacements(),
35                                            Context.Rewrite));
36  EXPECT_EQ(Expected, Context.getRewrittenText(ID));
37}
38
39TEST(RefactoringCallbacksTest, ReplacesStmtsWithString) {
40  std::string Code = "void f() { int i = 1; }";
41  std::string Expected = "void f() { ; }";
42  ReplaceStmtWithText Callback("id", ";");
43  expectRewritten(Code, Expected, id("id", declStmt()), Callback);
44}
45
46TEST(RefactoringCallbacksTest, ReplacesStmtsInCalledMacros) {
47  std::string Code = "#define A void f() { int i = 1; }\nA";
48  std::string Expected = "#define A void f() { ; }\nA";
49  ReplaceStmtWithText Callback("id", ";");
50  expectRewritten(Code, Expected, id("id", declStmt()), Callback);
51}
52
53TEST(RefactoringCallbacksTest, IgnoresStmtsInUncalledMacros) {
54  std::string Code = "#define A void f() { int i = 1; }";
55  std::string Expected = "#define A void f() { int i = 1; }";
56  ReplaceStmtWithText Callback("id", ";");
57  expectRewritten(Code, Expected, id("id", declStmt()), Callback);
58}
59
60TEST(RefactoringCallbacksTest, ReplacesInteger) {
61  std::string Code = "void f() { int i = 1; }";
62  std::string Expected = "void f() { int i = 2; }";
63  ReplaceStmtWithText Callback("id", "2");
64  expectRewritten(Code, Expected, id("id", expr(integerLiteral())),
65                  Callback);
66}
67
68TEST(RefactoringCallbacksTest, ReplacesStmtWithStmt) {
69  std::string Code = "void f() { int i = false ? 1 : i * 2; }";
70  std::string Expected = "void f() { int i = i * 2; }";
71  ReplaceStmtWithStmt Callback("always-false", "should-be");
72  expectRewritten(Code, Expected,
73      id("always-false", conditionalOperator(
74          hasCondition(boolLiteral(equals(false))),
75          hasFalseExpression(id("should-be", expr())))),
76      Callback);
77}
78
79TEST(RefactoringCallbacksTest, ReplacesIfStmt) {
80  std::string Code = "bool a; void f() { if (a) f(); else a = true; }";
81  std::string Expected = "bool a; void f() { f(); }";
82  ReplaceIfStmtWithItsBody Callback("id", true);
83  expectRewritten(Code, Expected,
84      id("id", ifStmt(
85          hasCondition(implicitCastExpr(hasSourceExpression(
86              declRefExpr(to(varDecl(hasName("a"))))))))),
87      Callback);
88}
89
90TEST(RefactoringCallbacksTest, RemovesEntireIfOnEmptyElse) {
91  std::string Code = "void f() { if (false) int i = 0; }";
92  std::string Expected = "void f() {  }";
93  ReplaceIfStmtWithItsBody Callback("id", false);
94  expectRewritten(Code, Expected,
95      id("id", ifStmt(hasCondition(boolLiteral(equals(false))))),
96      Callback);
97}
98
99} // end namespace ast_matchers
100} // end namespace clang
101