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llvm-project/clang/unittests/Format/FormatTestSelective.cpp

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//===- unittest/Format/FormatTestSelective.cpp - Formatting unit tests ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "FormatTestUtils.h"
#include "clang/Format/Format.h"
#include "llvm/Support/Debug.h"
#include "gtest/gtest.h"
#define DEBUG_TYPE "format-test"
namespace clang {
namespace format {
namespace {
class FormatTestSelective : public ::testing::Test {
protected:
std::string format(llvm::StringRef Code, unsigned Offset, unsigned Length) {
LLVM_DEBUG(llvm::errs() << "---\n");
LLVM_DEBUG(llvm::errs() << Code << "\n\n");
std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length));
FormattingAttemptStatus Status;
tooling::Replacements Replaces =
reformat(Style, Code, Ranges, "<stdin>", &Status);
EXPECT_TRUE(Status.FormatComplete) << Code << "\n\n";
auto Result = applyAllReplacements(Code, Replaces);
EXPECT_TRUE(static_cast<bool>(Result));
LLVM_DEBUG(llvm::errs() << "\n" << *Result << "\n\n");
return *Result;
}
FormatStyle Style = getLLVMStyle();
};
TEST_F(FormatTestSelective, RemovesTrailingWhitespaceOfFormattedLine) {
EXPECT_EQ("int a;\nint b;", format("int a; \nint b;", 0, 0));
EXPECT_EQ("int a;", format("int a; ", 0, 0));
EXPECT_EQ("int a;\n", format("int a; \n \n \n ", 0, 0));
EXPECT_EQ("int a;\nint b; ", format("int a; \nint b; ", 0, 0));
}
TEST_F(FormatTestSelective, FormatsCorrectRegionForLeadingWhitespace) {
EXPECT_EQ("{int b;\n"
" int a;\n"
"}",
format("{int b;\n int a;}", 8, 0));
EXPECT_EQ("{\n"
" int b;\n"
" int a;}",
format("{int b;\n int a;}", 7, 0));
Style.ColumnLimit = 12;
EXPECT_EQ("#define A \\\n"
" int a; \\\n"
" int b;",
format("#define A \\\n"
" int a; \\\n"
" int b;",
26, 0));
EXPECT_EQ("#define A \\\n"
" int a; \\\n"
" int b;",
format("#define A \\\n"
" int a; \\\n"
" int b;",
25, 0));
}
TEST_F(FormatTestSelective, FormatLineWhenInvokedOnTrailingNewline) {
EXPECT_EQ("int b;\n\nint a;", format("int b;\n\nint a;", 8, 0));
EXPECT_EQ("int b;\n\nint a;", format("int b;\n\nint a;", 7, 0));
// This might not strictly be correct, but is likely good in all practical
// cases.
EXPECT_EQ("int b;\nint a;", format("int b;int a;", 7, 0));
}
TEST_F(FormatTestSelective, RemovesWhitespaceWhenTriggeredOnEmptyLine) {
EXPECT_EQ("int a;\n\n int b;", format("int a;\n \n\n int b;", 8, 0));
EXPECT_EQ("int a;\n\n int b;", format("int a;\n \n\n int b;", 9, 0));
}
TEST_F(FormatTestSelective, ReformatsMovedLines) {
EXPECT_EQ(
"template <typename T> T *getFETokenInfo() const {\n"
" return static_cast<T *>(FETokenInfo);\n"
"}\n"
"int a; // <- Should not be formatted",
format(
"template<typename T>\n"
"T *getFETokenInfo() const { return static_cast<T*>(FETokenInfo); }\n"
"int a; // <- Should not be formatted",
9, 5));
}
TEST_F(FormatTestSelective, FormatsIfWithoutCompoundStatement) {
Style.AllowShortIfStatementsOnASingleLine = FormatStyle::SIS_WithoutElse;
EXPECT_EQ("if (a) return;", format("if(a)\nreturn;", 7, 1));
EXPECT_EQ("if (a) return; // comment",
format("if(a)\nreturn; // comment", 20, 1));
}
TEST_F(FormatTestSelective, FormatsCommentsLocally) {
EXPECT_EQ("int a; // comment\n"
"int b; // comment",
format("int a; // comment\n"
"int b; // comment",
0, 0));
EXPECT_EQ("int a; // comment\n"
" // line 2\n"
"int b;",
format("int a; // comment\n"
" // line 2\n"
"int b;",
28, 0));
EXPECT_EQ("int a; // comment\n"
"// comment 2\n"
"int b;",
format("int a; // comment\n"
"// comment 2\n"
"int b;", 28, 0));
EXPECT_EQ("int aaaaaa; // comment\n"
"int b;\n"
"int c; // unrelated comment",
format("int aaaaaa; // comment\n"
"int b;\n"
"int c; // unrelated comment",
31, 0));
EXPECT_EQ("int a; // This\n"
" // is\n"
" // a",
format("int a; // This\n"
" // is\n"
" // a",
0, 0));
EXPECT_EQ("int a; // This\n"
" // is\n"
" // a\n"
"// This is b\n"
"int b;",
format("int a; // This\n"
" // is\n"
" // a\n"
"// This is b\n"
"int b;",
0, 0));
EXPECT_EQ("int a; // This\n"
" // is\n"
" // a\n"
"\n"
"//This is unrelated",
format("int a; // This\n"
" // is\n"
" // a\n"
"\n"
"//This is unrelated",
0, 0));
EXPECT_EQ("int a;\n"
"// This is\n"
"// not formatted. ",
format("int a;\n"
"// This is\n"
"// not formatted. ",
0, 0));
EXPECT_EQ("int x; // Format this line.\n"
"int xx; //\n"
"int xxxxx; //",
format("int x; // Format this line.\n"
"int xx; //\n"
"int xxxxx; //",
0, 0));
}
TEST_F(FormatTestSelective, ContinueReindenting) {
// When we change an indent, we continue formatting as long as following
// lines are not indented correctly.
EXPECT_EQ("int i;\n"
"int b;\n"
"int c;\n"
"int d;\n"
"int e;\n"
" int f;\n",
format("int i;\n"
" int b;\n"
" int c;\n"
" int d;\n"
"int e;\n"
" int f;\n",
11, 0));
}
TEST_F(FormatTestSelective, ReindentClosingBrace) {
EXPECT_EQ("int i;\n"
"int f() {\n"
" int a;\n"
" int b;\n"
"}\n"
" int c;\n",
format("int i;\n"
" int f(){\n"
"int a;\n"
"int b;\n"
" }\n"
" int c;\n",
11, 0));
EXPECT_EQ("void f() {\n"
" if (foo) {\n"
" b();\n"
" } else {\n"
" c();\n"
" }\n"
"int d;\n"
"}\n",
format("void f() {\n"
" if (foo) {\n"
"b();\n"
"}else{\n"
"c();\n"
"}\n"
"int d;\n"
"}\n",
13, 0));
EXPECT_EQ("int i = []() {\n"
" class C {\n"
" int a;\n"
" int b;\n"
" };\n"
" int c;\n"
"};\n",
format("int i = []() {\n"
" class C{\n"
"int a;\n"
"int b;\n"
"};\n"
"int c;\n"
" };\n",
17, 0));
}
TEST_F(FormatTestSelective, IndividualStatementsOfNestedBlocks) {
EXPECT_EQ("DEBUG({\n"
" int i;\n"
" int j;\n"
"});",
format("DEBUG( {\n"
" int i;\n"
" int j;\n"
"} ) ;",
20, 1));
EXPECT_EQ("DEBUG( {\n"
" int i;\n"
" int j;\n"
"} ) ;",
format("DEBUG( {\n"
" int i;\n"
" int j;\n"
"} ) ;",
41, 1));
EXPECT_EQ("DEBUG( {\n"
" int i;\n"
" int j;\n"
"} ) ;",
format("DEBUG( {\n"
" int i;\n"
" int j;\n"
"} ) ;",
41, 1));
EXPECT_EQ("DEBUG({\n"
" int i;\n"
" int j;\n"
"});",
format("DEBUG( {\n"
" int i;\n"
" int j;\n"
"} ) ;",
20, 1));
EXPECT_EQ("Debug({\n"
" if (aaaaaaaaaaaaaaaaaaaaaaaa)\n"
" return;\n"
" },\n"
" a);",
format("Debug({\n"
" if (aaaaaaaaaaaaaaaaaaaaaaaa)\n"
" return;\n"
" },\n"
" a);",
50, 1));
EXPECT_EQ("DEBUG({\n"
" DEBUG({\n"
" int a;\n"
" int b;\n"
" }) ;\n"
"});",
format("DEBUG({\n"
" DEBUG({\n"
" int a;\n"
" int b;\n" // Format this line only.
" }) ;\n" // Don't touch this line.
"});",
35, 0));
EXPECT_EQ("DEBUG({\n"
" int a; //\n"
"});",
format("DEBUG({\n"
" int a; //\n"
"});",
0, 0));
EXPECT_EQ("someFunction(\n"
" [] {\n"
" // Only with this comment.\n"
" int i; // invoke formatting here.\n"
" }, // force line break\n"
" aaa);",
format("someFunction(\n"
" [] {\n"
" // Only with this comment.\n"
" int i; // invoke formatting here.\n"
" }, // force line break\n"
" aaa);",
63, 1));
EXPECT_EQ("int longlongname; // comment\n"
"int x = f({\n"
" int x; // comment\n"
" int y; // comment\n"
"});",
format("int longlongname; // comment\n"
"int x = f({\n"
" int x; // comment\n"
" int y; // comment\n"
"});",
65, 0));
EXPECT_EQ("int s = f({\n"
" class X {\n"
" public:\n"
" void f();\n"
" };\n"
"});",
format("int s = f({\n"
" class X {\n"
" public:\n"
" void f();\n"
" };\n"
"});",
0, 0));
EXPECT_EQ("SomeFunction(\n"
" [] {\n"
" int i;\n"
" return i;\n" // Format this line.
" },\n"
" [] {\n"
" return 2;\n" // Don't fix this.
" });",
format("SomeFunction(\n"
" [] {\n"
" int i;\n"
" return i;\n" // Format this line.
" },\n"
" [] {\n"
" return 2;\n" // Don't fix this.
" });",
40, 0));
}
TEST_F(FormatTestSelective, WrongIndent) {
EXPECT_EQ("namespace {\n"
"int i;\n"
"int j;\n"
"}",
format("namespace {\n"
" int i;\n" // Format here.
" int j;\n"
"}",
15, 0));
EXPECT_EQ("namespace {\n"
" int i;\n"
" int j;\n"
"}",
format("namespace {\n"
" int i;\n"
" int j;\n" // Format here.
"}",
24, 0));
}
TEST_F(FormatTestSelective, AlwaysFormatsEntireMacroDefinitions) {
Style.AlignEscapedNewlines = FormatStyle::ENAS_Left;
EXPECT_EQ("int i;\n"
"#define A \\\n"
" int i; \\\n"
" int j\n"
"int k;",
format("int i;\n"
"#define A \\\n"
" int i ; \\\n"
" int j\n"
"int k;",
8, 0)); // 8: position of "#define".
EXPECT_EQ("int i;\n"
"#define A \\\n"
" int i; \\\n"
" int j\n"
"int k;",
format("int i;\n"
"#define A \\\n"
" int i ; \\\n"
" int j\n"
"int k;",
45, 0)); // 45: position of "j".
}
TEST_F(FormatTestSelective, ReformatRegionAdjustsIndent) {
EXPECT_EQ("{\n"
"{\n"
"a;\n"
"b;\n"
"}\n"
"}",
format("{\n"
"{\n"
"a;\n"
" b;\n"
"}\n"
"}",
13, 2));
EXPECT_EQ("{\n"
"{\n"
" a;\n"
" b;\n"
" c;\n"
" d;\n"
"}\n"
"}",
format("{\n"
"{\n"
" a;\n"
" b;\n"
" c;\n"
" d;\n"
"}\n"
"}",
9, 2));
EXPECT_EQ("{\n"
"{\n"
"public:\n"
" b;\n"
"}\n"
"}",
format("{\n"
"{\n"
"public:\n"
" b;\n"
"}\n"
"}",
17, 2));
EXPECT_EQ("{\n"
"{\n"
"a;\n"
"}\n"
"{\n"
" b; //\n"
"}\n"
"}",
format("{\n"
"{\n"
"a;\n"
"}\n"
"{\n"
" b; //\n"
"}\n"
"}",
22, 2));
EXPECT_EQ(" {\n"
" a; //\n"
" }",
format(" {\n"
"a; //\n"
" }",
4, 2));
EXPECT_EQ("void f() {}\n"
"void g() {}",
format("void f() {}\n"
"void g() {}",
13, 0));
EXPECT_EQ("int a; // comment\n"
" // line 2\n"
"int b;",
format("int a; // comment\n"
" // line 2\n"
" int b;",
35, 0));
EXPECT_EQ(" void f() {\n"
"#define A 1\n"
" }",
format(" void f() {\n"
" #define A 1\n" // Format this line.
" }",
20, 0));
EXPECT_EQ(" void f() {\n"
" int i;\n"
"#define A \\\n"
" int i; \\\n"
" int j;\n"
" int k;\n"
" }",
format(" void f() {\n"
" int i;\n"
"#define A \\\n"
" int i; \\\n"
" int j;\n"
" int k;\n" // Format this line.
" }",
67, 0));
Style.ColumnLimit = 11;
EXPECT_EQ(" int a;\n"
" void\n"
" ffffff() {\n"
" }",
format(" int a;\n"
"void ffffff() {}",
11, 0));
}
TEST_F(FormatTestSelective, UnderstandsTabs) {
Style.IndentWidth = 8;
Style.UseTab = FormatStyle::UT_Always;
Style.AlignEscapedNewlines = FormatStyle::ENAS_Left;
EXPECT_EQ("void f() {\n"
"\tf();\n"
"\tg();\n"
"}",
format("void f() {\n"
"\tf();\n"
"\tg();\n"
"}",
0, 0));
EXPECT_EQ("void f() {\n"
"\tf();\n"
"\tg();\n"
"}",
format("void f() {\n"
"\tf();\n"
"\tg();\n"
"}",
16, 0));
EXPECT_EQ("void f() {\n"
" \tf();\n"
"\tg();\n"
"}",
format("void f() {\n"
" \tf();\n"
" \tg();\n"
"}",
21, 0));
}
TEST_F(FormatTestSelective, StopFormattingWhenLeavingScope) {
EXPECT_EQ(
"void f() {\n"
" if (a) {\n"
" g();\n"
" h();\n"
" }\n"
"\n"
"void g() {\n"
"}",
format("void f() {\n"
" if (a) {\n" // Assume this was added without the closing brace.
" g();\n"
" h();\n"
"}\n"
"\n"
"void g() {\n" // Make sure not to format this.
"}",
15, 0));
}
TEST_F(FormatTestSelective, SelectivelyRequoteJavaScript) {
Style = getGoogleStyle(FormatStyle::LK_JavaScript);
EXPECT_EQ(
"var x = \"a\";\n"
"var x = 'a';\n"
"var x = \"a\";",
format("var x = \"a\";\n"
"var x = \"a\";\n"
"var x = \"a\";",
20, 0));
}
TEST_F(FormatTestSelective, KeepsIndentAfterCommentSectionImport) {
std::string Code = "#include <a> // line 1\n" // 23 chars long
" // line 2\n" // 23 chars long
"\n" // this newline is char 47
"int i;"; // this line is not indented
EXPECT_EQ(Code, format(Code, 47, 1));
}
} // end namespace
} // end namespace format
} // end namespace clang
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