xref: /llvm-project/clang/unittests/Format/CleanupTest.cpp (revision ce5e4bc7ac873bb99143b7c27601f7e27d15a37c)
1 //===- unittest/Format/CleanupTest.cpp - Code cleanup unit tests ----------===//
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/Format/Format.h"
11 
12 #include "clang/Tooling/Core/Replacement.h"
13 
14 #include "gtest/gtest.h"
15 
16 namespace clang {
17 namespace format {
18 namespace {
19 
20 class CleanupTest : public ::testing::Test {
21 protected:
22   std::string cleanup(llvm::StringRef Code,
23                       const std::vector<tooling::Range> &Ranges,
24                       const FormatStyle &Style = getLLVMStyle()) {
25     tooling::Replacements Replaces = format::cleanup(Style, Code, Ranges);
26 
27     std::string Result = applyAllReplacements(Code, Replaces);
28     EXPECT_NE("", Result);
29     return Result;
30   }
31 };
32 
33 TEST_F(CleanupTest, DeleteEmptyNamespaces) {
34   std::string Code = "namespace A {\n"
35                      "namespace B {\n"
36                      "} // namespace B\n"
37                      "} // namespace A\n\n"
38                      "namespace C {\n"
39                      "namespace D { int i; }\n"
40                      "inline namespace E { namespace { } }\n"
41                      "}";
42   std::string Expected = "\n\n\n\n\nnamespace C {\n"
43                          "namespace D { int i; }\n   \n"
44                          "}";
45   std::vector<tooling::Range> Ranges;
46   Ranges.push_back(tooling::Range(28, 0));
47   Ranges.push_back(tooling::Range(91, 6));
48   Ranges.push_back(tooling::Range(132, 0));
49   std::string Result = cleanup(Code, Ranges);
50   EXPECT_EQ(Expected, Result);
51 }
52 
53 TEST_F(CleanupTest, NamespaceWithSyntaxError) {
54   std::string Code = "namespace A {\n"
55                      "namespace B {\n" // missing r_brace
56                      "} // namespace A\n\n"
57                      "namespace C {\n"
58                      "namespace D int i; }\n"
59                      "inline namespace E { namespace { } }\n"
60                      "}";
61   std::string Expected = "namespace A {\n"
62                          "\n\n\nnamespace C {\n"
63                          "namespace D int i; }\n   \n"
64                          "}";
65   std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
66   std::string Result = cleanup(Code, Ranges);
67   EXPECT_EQ(Expected, Result);
68 }
69 
70 TEST_F(CleanupTest, EmptyNamespaceNotAffected) {
71   std::string Code = "namespace A {\n\n"
72                      "namespace {\n\n}}";
73   // Even though the namespaces are empty, but the inner most empty namespace
74   // block is not affected by the changed ranges.
75   std::string Expected = "namespace A {\n\n"
76                          "namespace {\n\n}}";
77   // Set the changed range to be the second "\n".
78   std::vector<tooling::Range> Ranges(1, tooling::Range(14, 0));
79   std::string Result = cleanup(Code, Ranges);
80   EXPECT_EQ(Expected, Result);
81 }
82 
83 TEST_F(CleanupTest, EmptyNamespaceWithCommentsNoBreakBeforeBrace) {
84   std::string Code = "namespace A {\n"
85                      "namespace B {\n"
86                      "// Yo\n"
87                      "} // namespace B\n"
88                      "} // namespace A\n"
89                      "namespace C { // Yo\n"
90                      "}";
91   std::string Expected = "\n\n\n\n\n\n";
92   std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
93   std::string Result = cleanup(Code, Ranges);
94   EXPECT_EQ(Expected, Result);
95 }
96 
97 TEST_F(CleanupTest, EmptyNamespaceWithCommentsBreakBeforeBrace) {
98   std::string Code = "namespace A\n"
99                      "/* Yo */ {\n"
100                      "namespace B\n"
101                      "{\n"
102                      "// Yo\n"
103                      "} // namespace B\n"
104                      "} // namespace A\n"
105                      "namespace C\n"
106                      "{ // Yo\n"
107                      "}\n";
108   std::string Expected = "\n\n\n\n\n\n\n\n\n\n";
109   std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
110   FormatStyle Style = getLLVMStyle();
111   Style.BraceWrapping.AfterNamespace = true;
112   std::string Result = cleanup(Code, Ranges, Style);
113   EXPECT_EQ(Expected, Result);
114 }
115 
116 TEST_F(CleanupTest, CtorInitializationSimpleRedundantComma) {
117   std::string Code = "class A {\nA() : , {} };";
118   std::string Expected = "class A {\nA()  {} };";
119   std::vector<tooling::Range> Ranges;
120   Ranges.push_back(tooling::Range(17, 0));
121   Ranges.push_back(tooling::Range(19, 0));
122   std::string Result = cleanup(Code, Ranges);
123   EXPECT_EQ(Expected, Result);
124 
125   Code = "class A {\nA() : x(1), {} };";
126   Expected = "class A {\nA() : x(1) {} };";
127   Ranges.clear();
128   Ranges.push_back(tooling::Range(23, 0));
129   Result = cleanup(Code, Ranges);
130   EXPECT_EQ(Expected, Result);
131 
132   Code = "class A {\nA() :,,,,{} };";
133   Expected = "class A {\nA() {} };";
134   Ranges.clear();
135   Ranges.push_back(tooling::Range(15, 0));
136   Result = cleanup(Code, Ranges);
137   EXPECT_EQ(Expected, Result);
138 }
139 
140 TEST_F(CleanupTest, ListSimpleRedundantComma) {
141   std::string Code = "void f() { std::vector<int> v = {1,2,,,3,{4,5}}; }";
142   std::string Expected = "void f() { std::vector<int> v = {1,2,3,{4,5}}; }";
143   std::vector<tooling::Range> Ranges;
144   Ranges.push_back(tooling::Range(40, 0));
145   std::string Result = cleanup(Code, Ranges);
146   EXPECT_EQ(Expected, Result);
147 
148   Code = "int main() { f(1,,2,3,,4);}";
149   Expected = "int main() { f(1,2,3,4);}";
150   Ranges.clear();
151   Ranges.push_back(tooling::Range(17, 0));
152   Ranges.push_back(tooling::Range(22, 0));
153   Result = cleanup(Code, Ranges);
154   EXPECT_EQ(Expected, Result);
155 }
156 
157 TEST_F(CleanupTest, CtorInitializationBracesInParens) {
158   std::string Code = "class A {\nA() : x({1}),, {} };";
159   std::string Expected = "class A {\nA() : x({1}) {} };";
160   std::vector<tooling::Range> Ranges;
161   Ranges.push_back(tooling::Range(24, 0));
162   Ranges.push_back(tooling::Range(26, 0));
163   std::string Result = cleanup(Code, Ranges);
164   EXPECT_EQ(Expected, Result);
165 }
166 
167 TEST_F(CleanupTest, RedundantCommaNotInAffectedRanges) {
168   std::string Code =
169       "class A {\nA() : x({1}), /* comment */, { int x = 0; } };";
170   std::string Expected =
171       "class A {\nA() : x({1}), /* comment */, { int x = 0; } };";
172   // Set the affected range to be "int x = 0", which does not intercept the
173   // constructor initialization list.
174   std::vector<tooling::Range> Ranges(1, tooling::Range(42, 9));
175   std::string Result = cleanup(Code, Ranges);
176   EXPECT_EQ(Expected, Result);
177 
178   Code = "class A {\nA() : x(1), {} };";
179   Expected = "class A {\nA() : x(1), {} };";
180   // No range. Fixer should do nothing.
181   Ranges.clear();
182   Result = cleanup(Code, Ranges);
183   EXPECT_EQ(Expected, Result);
184 }
185 
186 // FIXME: delete comments too.
187 TEST_F(CleanupTest, CtorInitializationCommentAroundCommas) {
188   // Remove redundant commas around comment.
189   std::string Code = "class A {\nA() : x({1}), /* comment */, {} };";
190   std::string Expected = "class A {\nA() : x({1}) /* comment */ {} };";
191   std::vector<tooling::Range> Ranges;
192   Ranges.push_back(tooling::Range(25, 0));
193   Ranges.push_back(tooling::Range(40, 0));
194   std::string Result = cleanup(Code, Ranges);
195   EXPECT_EQ(Expected, Result);
196 
197   // Remove trailing comma and ignore comment.
198   Code = "class A {\nA() : x({1}), // comment\n{} };";
199   Expected = "class A {\nA() : x({1}) // comment\n{} };";
200   Ranges = std::vector<tooling::Range>(1, tooling::Range(25, 0));
201   Result = cleanup(Code, Ranges);
202   EXPECT_EQ(Expected, Result);
203 
204   // Remove trailing comma and ignore comment.
205   Code = "class A {\nA() : x({1}), // comment\n , y(1),{} };";
206   Expected = "class A {\nA() : x({1}), // comment\n  y(1){} };";
207   Ranges = std::vector<tooling::Range>(1, tooling::Range(38, 0));
208   Result = cleanup(Code, Ranges);
209   EXPECT_EQ(Expected, Result);
210 
211   // Remove trailing comma and ignore comment.
212   Code = "class A {\nA() : x({1}), \n/* comment */, y(1),{} };";
213   Expected = "class A {\nA() : x({1}), \n/* comment */ y(1){} };";
214   Ranges = std::vector<tooling::Range>(1, tooling::Range(40, 0));
215   Result = cleanup(Code, Ranges);
216   EXPECT_EQ(Expected, Result);
217 
218   // Remove trailing comma and ignore comment.
219   Code = "class A {\nA() : , // comment\n y(1),{} };";
220   Expected = "class A {\nA() :  // comment\n y(1){} };";
221   Ranges = std::vector<tooling::Range>(1, tooling::Range(17, 0));
222   Result = cleanup(Code, Ranges);
223   EXPECT_EQ(Expected, Result);
224 }
225 
226 TEST_F(CleanupTest, CtorInitializerInNamespace) {
227   std::string Code = "namespace A {\n"
228                      "namespace B {\n" // missing r_brace
229                      "} // namespace A\n\n"
230                      "namespace C {\n"
231                      "class A { A() : x(0),, {} };\n"
232                      "inline namespace E { namespace { } }\n"
233                      "}";
234   std::string Expected = "namespace A {\n"
235                          "\n\n\nnamespace C {\n"
236                          "class A { A() : x(0) {} };\n   \n"
237                          "}";
238   std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
239   std::string Result = cleanup(Code, Ranges);
240   EXPECT_EQ(Expected, Result);
241 }
242 
243 } // end namespace
244 } // end namespace format
245 } // end namespace clang
246