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FormatTest.cpp
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FormatTest.cpp
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//===- unittest/Format/FormatTest.cpp - Formatting unit tests -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Format/Format.h"
#include "../Tooling/ReplacementTest.h"
#include "FormatTestUtils.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MemoryBuffer.h"
#include "gtest/gtest.h"
#define DEBUG_TYPE "format-test"
using clang::tooling::ReplacementTest;
using clang::tooling::toReplacements;
namespace clang {
namespace format {
namespace {
FormatStyle getGoogleStyle() { return getGoogleStyle(FormatStyle::LK_Cpp); }
class FormatTest : public ::testing::Test {
protected:
enum IncompleteCheck {
IC_ExpectComplete,
IC_ExpectIncomplete,
IC_DoNotCheck
};
std::string format(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle(),
IncompleteCheck CheckIncomplete = IC_ExpectComplete) {
DEBUG(llvm::errs() << "---\n");
DEBUG(llvm::errs() << Code << "\n\n");
std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
bool IncompleteFormat = false;
tooling::Replacements Replaces =
reformat(Style, Code, Ranges, "<stdin>", &IncompleteFormat);
if (CheckIncomplete != IC_DoNotCheck) {
bool ExpectedIncompleteFormat = CheckIncomplete == IC_ExpectIncomplete;
EXPECT_EQ(ExpectedIncompleteFormat, IncompleteFormat) << Code << "\n\n";
}
ReplacementCount = Replaces.size();
auto Result = applyAllReplacements(Code, Replaces);
EXPECT_TRUE(static_cast<bool>(Result));
DEBUG(llvm::errs() << "\n" << *Result << "\n\n");
return *Result;
}
FormatStyle getLLVMStyleWithColumns(unsigned ColumnLimit) {
FormatStyle Style = getLLVMStyle();
Style.ColumnLimit = ColumnLimit;
return Style;
}
FormatStyle getGoogleStyleWithColumns(unsigned ColumnLimit) {
FormatStyle Style = getGoogleStyle();
Style.ColumnLimit = ColumnLimit;
return Style;
}
void verifyFormat(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle()) {
EXPECT_EQ(Code.str(), format(test::messUp(Code), Style));
}
void verifyIncompleteFormat(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle()) {
EXPECT_EQ(Code.str(),
format(test::messUp(Code), Style, IC_ExpectIncomplete));
}
void verifyGoogleFormat(llvm::StringRef Code) {
verifyFormat(Code, getGoogleStyle());
}
void verifyIndependentOfContext(llvm::StringRef text) {
verifyFormat(text);
verifyFormat(llvm::Twine("void f() { " + text + " }").str());
}
/// \brief Verify that clang-format does not crash on the given input.
void verifyNoCrash(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle()) {
format(Code, Style, IC_DoNotCheck);
}
int ReplacementCount;
};
TEST_F(FormatTest, MessUp) {
EXPECT_EQ("1 2 3", test::messUp("1 2 3"));
EXPECT_EQ("1 2 3\n", test::messUp("1\n2\n3\n"));
EXPECT_EQ("a\n//b\nc", test::messUp("a\n//b\nc"));
EXPECT_EQ("a\n#b\nc", test::messUp("a\n#b\nc"));
EXPECT_EQ("a\n#b c d\ne", test::messUp("a\n#b\\\nc\\\nd\ne"));
}
//===----------------------------------------------------------------------===//
// Basic function tests.
//===----------------------------------------------------------------------===//
TEST_F(FormatTest, DoesNotChangeCorrectlyFormattedCode) {
EXPECT_EQ(";", format(";"));
}
TEST_F(FormatTest, FormatsGlobalStatementsAt0) {
EXPECT_EQ("int i;", format(" int i;"));
EXPECT_EQ("\nint i;", format(" \n\t \v \f int i;"));
EXPECT_EQ("int i;\nint j;", format(" int i; int j;"));
EXPECT_EQ("int i;\nint j;", format(" int i;\n int j;"));
}
TEST_F(FormatTest, FormatsUnwrappedLinesAtFirstFormat) {
EXPECT_EQ("int i;", format("int\ni;"));
}
TEST_F(FormatTest, FormatsNestedBlockStatements) {
EXPECT_EQ("{\n {\n {}\n }\n}", format("{{{}}}"));
}
TEST_F(FormatTest, FormatsNestedCall) {
verifyFormat("Method(f1, f2(f3));");
verifyFormat("Method(f1(f2, f3()));");
verifyFormat("Method(f1(f2, (f3())));");
}
TEST_F(FormatTest, NestedNameSpecifiers) {
verifyFormat("vector<::Type> v;");
verifyFormat("::ns::SomeFunction(::ns::SomeOtherFunction())");
verifyFormat("static constexpr bool Bar = decltype(bar())::value;");
verifyFormat("bool a = 2 < ::SomeFunction();");
}
TEST_F(FormatTest, OnlyGeneratesNecessaryReplacements) {
EXPECT_EQ("if (a) {\n"
" f();\n"
"}",
format("if(a){f();}"));
EXPECT_EQ(4, ReplacementCount);
EXPECT_EQ("if (a) {\n"
" f();\n"
"}",
format("if (a) {\n"
" f();\n"
"}"));
EXPECT_EQ(0, ReplacementCount);
EXPECT_EQ("/*\r\n"
"\r\n"
"*/\r\n",
format("/*\r\n"
"\r\n"
"*/\r\n"));
EXPECT_EQ(0, ReplacementCount);
}
TEST_F(FormatTest, RemovesEmptyLines) {
EXPECT_EQ("class C {\n"
" int i;\n"
"};",
format("class C {\n"
" int i;\n"
"\n"
"};"));
// Don't remove empty lines at the start of namespaces or extern "C" blocks.
EXPECT_EQ("namespace N {\n"
"\n"
"int i;\n"
"}",
format("namespace N {\n"
"\n"
"int i;\n"
"}",
getGoogleStyle()));
EXPECT_EQ("extern /**/ \"C\" /**/ {\n"
"\n"
"int i;\n"
"}",
format("extern /**/ \"C\" /**/ {\n"
"\n"
"int i;\n"
"}",
getGoogleStyle()));
// ...but do keep inlining and removing empty lines for non-block extern "C"
// functions.
verifyFormat("extern \"C\" int f() { return 42; }", getGoogleStyle());
EXPECT_EQ("extern \"C\" int f() {\n"
" int i = 42;\n"
" return i;\n"
"}",
format("extern \"C\" int f() {\n"
"\n"
" int i = 42;\n"
" return i;\n"
"}",
getGoogleStyle()));
// Remove empty lines at the beginning and end of blocks.
EXPECT_EQ("void f() {\n"
"\n"
" if (a) {\n"
"\n"
" f();\n"
" }\n"
"}",
format("void f() {\n"
"\n"
" if (a) {\n"
"\n"
" f();\n"
"\n"
" }\n"
"\n"
"}",
getLLVMStyle()));
EXPECT_EQ("void f() {\n"
" if (a) {\n"
" f();\n"
" }\n"
"}",
format("void f() {\n"
"\n"
" if (a) {\n"
"\n"
" f();\n"
"\n"
" }\n"
"\n"
"}",
getGoogleStyle()));
// Don't remove empty lines in more complex control statements.
EXPECT_EQ("void f() {\n"
" if (a) {\n"
" f();\n"
"\n"
" } else if (b) {\n"
" f();\n"
" }\n"
"}",
format("void f() {\n"
" if (a) {\n"
" f();\n"
"\n"
" } else if (b) {\n"
" f();\n"
"\n"
" }\n"
"\n"
"}"));
// FIXME: This is slightly inconsistent.
EXPECT_EQ("namespace {\n"
"int i;\n"
"}",
format("namespace {\n"
"int i;\n"
"\n"
"}"));
EXPECT_EQ("namespace {\n"
"int i;\n"
"\n"
"} // namespace",
format("namespace {\n"
"int i;\n"
"\n"
"} // namespace"));
FormatStyle Style = getLLVMStyle();
Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All;
Style.MaxEmptyLinesToKeep = 2;
Style.BreakBeforeBraces = FormatStyle::BS_Custom;
Style.BraceWrapping.AfterClass = true;
Style.BraceWrapping.AfterFunction = true;
Style.KeepEmptyLinesAtTheStartOfBlocks = false;
EXPECT_EQ("class Foo\n"
"{\n"
" Foo() {}\n"
"\n"
" void funk() {}\n"
"};",
format("class Foo\n"
"{\n"
" Foo()\n"
" {\n"
" }\n"
"\n"
" void funk() {}\n"
"};",
Style));
}
TEST_F(FormatTest, RecognizesBinaryOperatorKeywords) {
verifyFormat("x = (a) and (b);");
verifyFormat("x = (a) or (b);");
verifyFormat("x = (a) bitand (b);");
verifyFormat("x = (a) bitor (b);");
verifyFormat("x = (a) not_eq (b);");
verifyFormat("x = (a) and_eq (b);");
verifyFormat("x = (a) or_eq (b);");
verifyFormat("x = (a) xor (b);");
}
//===----------------------------------------------------------------------===//
// Tests for control statements.
//===----------------------------------------------------------------------===//
TEST_F(FormatTest, FormatIfWithoutCompoundStatement) {
verifyFormat("if (true)\n f();\ng();");
verifyFormat("if (a)\n if (b)\n if (c)\n g();\nh();");
verifyFormat("if (a)\n if (b) {\n f();\n }\ng();");
FormatStyle AllowsMergedIf = getLLVMStyle();
AllowsMergedIf.AlignEscapedNewlinesLeft = true;
AllowsMergedIf.AllowShortIfStatementsOnASingleLine = true;
verifyFormat("if (a)\n"
" // comment\n"
" f();",
AllowsMergedIf);
verifyFormat("{\n"
" if (a)\n"
" label:\n"
" f();\n"
"}",
AllowsMergedIf);
verifyFormat("#define A \\\n"
" if (a) \\\n"
" label: \\\n"
" f()",
AllowsMergedIf);
verifyFormat("if (a)\n"
" ;",
AllowsMergedIf);
verifyFormat("if (a)\n"
" if (b) return;",
AllowsMergedIf);
verifyFormat("if (a) // Can't merge this\n"
" f();\n",
AllowsMergedIf);
verifyFormat("if (a) /* still don't merge */\n"
" f();",
AllowsMergedIf);
verifyFormat("if (a) { // Never merge this\n"
" f();\n"
"}",
AllowsMergedIf);
verifyFormat("if (a) { /* Never merge this */\n"
" f();\n"
"}",
AllowsMergedIf);
AllowsMergedIf.ColumnLimit = 14;
verifyFormat("if (a) return;", AllowsMergedIf);
verifyFormat("if (aaaaaaaaa)\n"
" return;",
AllowsMergedIf);
AllowsMergedIf.ColumnLimit = 13;
verifyFormat("if (a)\n return;", AllowsMergedIf);
}
TEST_F(FormatTest, FormatLoopsWithoutCompoundStatement) {
FormatStyle AllowsMergedLoops = getLLVMStyle();
AllowsMergedLoops.AllowShortLoopsOnASingleLine = true;
verifyFormat("while (true) continue;", AllowsMergedLoops);
verifyFormat("for (;;) continue;", AllowsMergedLoops);
verifyFormat("for (int &v : vec) v *= 2;", AllowsMergedLoops);
verifyFormat("while (true)\n"
" ;",
AllowsMergedLoops);
verifyFormat("for (;;)\n"
" ;",
AllowsMergedLoops);
verifyFormat("for (;;)\n"
" for (;;) continue;",
AllowsMergedLoops);
verifyFormat("for (;;) // Can't merge this\n"
" continue;",
AllowsMergedLoops);
verifyFormat("for (;;) /* still don't merge */\n"
" continue;",
AllowsMergedLoops);
}
TEST_F(FormatTest, FormatShortBracedStatements) {
FormatStyle AllowSimpleBracedStatements = getLLVMStyle();
AllowSimpleBracedStatements.AllowShortBlocksOnASingleLine = true;
AllowSimpleBracedStatements.AllowShortIfStatementsOnASingleLine = true;
AllowSimpleBracedStatements.AllowShortLoopsOnASingleLine = true;
verifyFormat("if (true) {}", AllowSimpleBracedStatements);
verifyFormat("while (true) {}", AllowSimpleBracedStatements);
verifyFormat("for (;;) {}", AllowSimpleBracedStatements);
verifyFormat("if (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("while (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("for (;;) { f(); }", AllowSimpleBracedStatements);
verifyFormat("if (true) { //\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true) {\n"
" f();\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true) {\n"
" f();\n"
"} else {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("template <int> struct A2 {\n"
" struct B {};\n"
"};",
AllowSimpleBracedStatements);
AllowSimpleBracedStatements.AllowShortIfStatementsOnASingleLine = false;
verifyFormat("if (true) {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true) {\n"
" f();\n"
"} else {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
AllowSimpleBracedStatements.AllowShortLoopsOnASingleLine = false;
verifyFormat("while (true) {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("for (;;) {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
}
TEST_F(FormatTest, ParseIfElse) {
verifyFormat("if (true)\n"
" if (true)\n"
" if (true)\n"
" f();\n"
" else\n"
" g();\n"
" else\n"
" h();\n"
"else\n"
" i();");
verifyFormat("if (true)\n"
" if (true)\n"
" if (true) {\n"
" if (true)\n"
" f();\n"
" } else {\n"
" g();\n"
" }\n"
" else\n"
" h();\n"
"else {\n"
" i();\n"
"}");
verifyFormat("void f() {\n"
" if (a) {\n"
" } else {\n"
" }\n"
"}");
}
TEST_F(FormatTest, ElseIf) {
verifyFormat("if (a) {\n} else if (b) {\n}");
verifyFormat("if (a)\n"
" f();\n"
"else if (b)\n"
" g();\n"
"else\n"
" h();");
verifyFormat("if (a) {\n"
" f();\n"
"}\n"
"// or else ..\n"
"else {\n"
" g()\n"
"}");
verifyFormat("if (a) {\n"
"} else if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaa)) {\n"
"}");
verifyFormat("if (a) {\n"
"} else if (\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n"
"}",
getLLVMStyleWithColumns(62));
}
TEST_F(FormatTest, FormatsForLoop) {
verifyFormat(
"for (int VeryVeryLongLoopVariable = 0; VeryVeryLongLoopVariable < 10;\n"
" ++VeryVeryLongLoopVariable)\n"
" ;");
verifyFormat("for (;;)\n"
" f();");
verifyFormat("for (;;) {\n}");
verifyFormat("for (;;) {\n"
" f();\n"
"}");
verifyFormat("for (int i = 0; (i < 10); ++i) {\n}");
verifyFormat(
"for (std::vector<UnwrappedLine>::iterator I = UnwrappedLines.begin(),\n"
" E = UnwrappedLines.end();\n"
" I != E; ++I) {\n}");
verifyFormat(
"for (MachineFun::iterator IIII = PrevIt, EEEE = F.end(); IIII != EEEE;\n"
" ++IIIII) {\n}");
verifyFormat("for (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaa =\n"
" aaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaa;\n"
" aaaaaaaaaaa != aaaaaaaaaaaaaaaaaaa; ++aaaaaaaaaaa) {\n}");
verifyFormat("for (llvm::ArrayRef<NamedDecl *>::iterator\n"
" I = FD->getDeclsInPrototypeScope().begin(),\n"
" E = FD->getDeclsInPrototypeScope().end();\n"
" I != E; ++I) {\n}");
verifyFormat("for (SmallVectorImpl<TemplateIdAnnotationn *>::iterator\n"
" I = Container.begin(),\n"
" E = Container.end();\n"
" I != E; ++I) {\n}",
getLLVMStyleWithColumns(76));
verifyFormat(
"for (aaaaaaaaaaaaaaaaa aaaaaaaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa !=\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
" ++aaaaaaaaaaa) {\n}");
verifyFormat("for (int i = 0; i < aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
" bbbbbbbbbbbbbbbbbbbb < ccccccccccccccc;\n"
" ++i) {\n}");
verifyFormat("for (int aaaaaaaaaaa = 1; aaaaaaaaaaa <= bbbbbbbbbbbbbbb;\n"
" aaaaaaaaaaa++, bbbbbbbbbbbbbbbbb++) {\n"
"}");
verifyFormat("for (some_namespace::SomeIterator iter( // force break\n"
" aaaaaaaaaa);\n"
" iter; ++iter) {\n"
"}");
verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaa != bbbbbbbbbbbbbbbbbbbbbbb;\n"
" ++aaaaaaaaaaaaaaaaaaaaaaaaaaa) {");
FormatStyle NoBinPacking = getLLVMStyle();
NoBinPacking.BinPackParameters = false;
verifyFormat("for (int aaaaaaaaaaa = 1;\n"
" aaaaaaaaaaa <= aaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaa,\n"
" aaaaaaaaaaaaaaaa,\n"
" aaaaaaaaaaaaaaaa,\n"
" aaaaaaaaaaaaaaaa);\n"
" aaaaaaaaaaa++, bbbbbbbbbbbbbbbbb++) {\n"
"}",
NoBinPacking);
verifyFormat(
"for (std::vector<UnwrappedLine>::iterator I = UnwrappedLines.begin(),\n"
" E = UnwrappedLines.end();\n"
" I != E;\n"
" ++I) {\n}",
NoBinPacking);
}
TEST_F(FormatTest, RangeBasedForLoops) {
verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa :\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaa :\n"
" aaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaa, aaaaaaaaaaaaa)) {\n}");
verifyFormat("for (const aaaaaaaaaaaaaaaaaaaaa &aaaaaaaaa :\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
verifyFormat("for (aaaaaaaaa aaaaaaaaaaaaaaaaaaaaa :\n"
" aaaaaaaaaaaa.aaaaaaaaaaaa().aaaaaaaaa().a()) {\n}");
}
TEST_F(FormatTest, ForEachLoops) {
verifyFormat("void f() {\n"
" foreach (Item *item, itemlist) {}\n"
" Q_FOREACH (Item *item, itemlist) {}\n"
" BOOST_FOREACH (Item *item, itemlist) {}\n"
" UNKNOWN_FORACH(Item * item, itemlist) {}\n"
"}");
// As function-like macros.
verifyFormat("#define foreach(x, y)\n"
"#define Q_FOREACH(x, y)\n"
"#define BOOST_FOREACH(x, y)\n"
"#define UNKNOWN_FOREACH(x, y)\n");
// Not as function-like macros.
verifyFormat("#define foreach (x, y)\n"
"#define Q_FOREACH (x, y)\n"
"#define BOOST_FOREACH (x, y)\n"
"#define UNKNOWN_FOREACH (x, y)\n");
}
TEST_F(FormatTest, FormatsWhileLoop) {
verifyFormat("while (true) {\n}");
verifyFormat("while (true)\n"
" f();");
verifyFormat("while () {\n}");
verifyFormat("while () {\n"
" f();\n"
"}");
}
TEST_F(FormatTest, FormatsDoWhile) {
verifyFormat("do {\n"
" do_something();\n"
"} while (something());");
verifyFormat("do\n"
" do_something();\n"
"while (something());");
}
TEST_F(FormatTest, FormatsSwitchStatement) {
verifyFormat("switch (x) {\n"
"case 1:\n"
" f();\n"
" break;\n"
"case kFoo:\n"
"case ns::kBar:\n"
"case kBaz:\n"
" break;\n"
"default:\n"
" g();\n"
" break;\n"
"}");
verifyFormat("switch (x) {\n"
"case 1: {\n"
" f();\n"
" break;\n"
"}\n"
"case 2: {\n"
" break;\n"
"}\n"
"}");
verifyFormat("switch (x) {\n"
"case 1: {\n"
" f();\n"
" {\n"
" g();\n"
" h();\n"
" }\n"
" break;\n"
"}\n"
"}");
verifyFormat("switch (x) {\n"
"case 1: {\n"
" f();\n"
" if (foo) {\n"
" g();\n"
" h();\n"
" }\n"
" break;\n"
"}\n"
"}");
verifyFormat("switch (x) {\n"
"case 1: {\n"
" f();\n"
" g();\n"
"} break;\n"
"}");
verifyFormat("switch (test)\n"
" ;");
verifyFormat("switch (x) {\n"
"default: {\n"
" // Do nothing.\n"
"}\n"
"}");
verifyFormat("switch (x) {\n"
"// comment\n"
"// if 1, do f()\n"
"case 1:\n"
" f();\n"
"}");
verifyFormat("switch (x) {\n"
"case 1:\n"
" // Do amazing stuff\n"
" {\n"
" f();\n"
" g();\n"
" }\n"
" break;\n"
"}");
verifyFormat("#define A \\\n"
" switch (x) { \\\n"
" case a: \\\n"
" foo = b; \\\n"
" }",
getLLVMStyleWithColumns(20));
verifyFormat("#define OPERATION_CASE(name) \\\n"
" case OP_name: \\\n"
" return operations::Operation##name\n",
getLLVMStyleWithColumns(40));
verifyFormat("switch (x) {\n"
"case 1:;\n"
"default:;\n"
" int i;\n"
"}");
verifyGoogleFormat("switch (x) {\n"
" case 1:\n"
" f();\n"
" break;\n"
" case kFoo:\n"
" case ns::kBar:\n"
" case kBaz:\n"
" break;\n"
" default:\n"
" g();\n"
" break;\n"
"}");
verifyGoogleFormat("switch (x) {\n"
" case 1: {\n"
" f();\n"
" break;\n"
" }\n"
"}");
verifyGoogleFormat("switch (test)\n"
" ;");
verifyGoogleFormat("#define OPERATION_CASE(name) \\\n"
" case OP_name: \\\n"
" return operations::Operation##name\n");
verifyGoogleFormat("Operation codeToOperation(OperationCode OpCode) {\n"
" // Get the correction operation class.\n"
" switch (OpCode) {\n"
" CASE(Add);\n"
" CASE(Subtract);\n"
" default:\n"
" return operations::Unknown;\n"
" }\n"
"#undef OPERATION_CASE\n"
"}");
verifyFormat("DEBUG({\n"
" switch (x) {\n"
" case A:\n"
" f();\n"
" break;\n"
" // On B:\n"
" case B:\n"
" g();\n"
" break;\n"
" }\n"
"});");
verifyFormat("switch (a) {\n"
"case (b):\n"
" return;\n"
"}");
verifyFormat("switch (a) {\n"
"case some_namespace::\n"
" some_constant:\n"
" return;\n"
"}",
getLLVMStyleWithColumns(34));
}
TEST_F(FormatTest, CaseRanges) {
verifyFormat("switch (x) {\n"
"case 'A' ... 'Z':\n"
"case 1 ... 5:\n"
"case a ... b:\n"
" break;\n"
"}");
}
TEST_F(FormatTest, ShortCaseLabels) {
FormatStyle Style = getLLVMStyle();
Style.AllowShortCaseLabelsOnASingleLine = true;
verifyFormat("switch (a) {\n"
"case 1: x = 1; break;\n"
"case 2: return;\n"
"case 3:\n"
"case 4:\n"
"case 5: return;\n"
"case 6: // comment\n"
" return;\n"
"case 7:\n"
" // comment\n"
" return;\n"
"case 8:\n"
" x = 8; // comment\n"
" break;\n"
"default: y = 1; break;\n"
"}",
Style);
verifyFormat("switch (a) {\n"
"#if FOO\n"
"case 0: return 0;\n"
"#endif\n"
"}",
Style);
verifyFormat("switch (a) {\n"
"case 1: {\n"
"}\n"
"case 2: {\n"
" return;\n"
"}\n"
"case 3: {\n"
" x = 1;\n"
" return;\n"
"}\n"
"case 4:\n"
" if (x)\n"
" return;\n"
"}",
Style);
Style.ColumnLimit = 21;
verifyFormat("switch (a) {\n"
"case 1: x = 1; break;\n"
"case 2: return;\n"
"case 3:\n"
"case 4:\n"
"case 5: return;\n"
"default:\n"
" y = 1;\n"
" break;\n"
"}",
Style);
}
TEST_F(FormatTest, FormatsLabels) {
verifyFormat("void f() {\n"
" some_code();\n"
"test_label:\n"
" some_other_code();\n"
" {\n"
" some_more_code();\n"
" another_label:\n"
" some_more_code();\n"
" }\n"
"}");
verifyFormat("{\n"
" some_code();\n"
"test_label:\n"
" some_other_code();\n"
"}");
verifyFormat("{\n"
" some_code();\n"
"test_label:;\n"
" int i = 0;\n"
"}");
}
//===----------------------------------------------------------------------===//
// Tests for comments.
//===----------------------------------------------------------------------===//
TEST_F(FormatTest, UnderstandsSingleLineComments) {
verifyFormat("//* */");
verifyFormat("// line 1\n"
"// line 2\n"
"void f() {}\n");
verifyFormat("void f() {\n"
" // Doesn't do anything\n"
"}");
verifyFormat("SomeObject\n"
" // Calling someFunction on SomeObject\n"
" .someFunction();");
verifyFormat("auto result = SomeObject\n"
" // Calling someFunction on SomeObject\n"
" .someFunction();");
verifyFormat("void f(int i, // some comment (probably for i)\n"
" int j, // some comment (probably for j)\n"
" int k); // some comment (probably for k)");
verifyFormat("void f(int i,\n"
" // some comment (probably for j)\n"
" int j,\n"
" // some comment (probably for k)\n"
" int k);");
verifyFormat("int i // This is a fancy variable\n"
" = 5; // with nicely aligned comment.");
verifyFormat("// Leading comment.\n"
"int a; // Trailing comment.");
verifyFormat("int a; // Trailing comment\n"
" // on 2\n"
" // or 3 lines.\n"
"int b;");
verifyFormat("int a; // Trailing comment\n"
"\n"
"// Leading comment.\n"
"int b;");
verifyFormat("int a; // Comment.\n"
" // More details.\n"
"int bbbb; // Another comment.");
verifyFormat(
"int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; // comment\n"
"int bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb; // comment\n"
"int cccccccccccccccccccccccccccccc; // comment\n"
"int ddd; // looooooooooooooooooooooooong comment\n"
"int aaaaaaaaaaaaaaaaaaaaaaa; // comment\n"
"int bbbbbbbbbbbbbbbbbbbbb; // comment\n"
"int ccccccccccccccccccc; // comment");
verifyFormat("#include \"a\" // comment\n"
"#include \"a/b/c\" // comment");
verifyFormat("#include <a> // comment\n"
"#include <a/b/c> // comment");
EXPECT_EQ("#include \"a\" // comment\n"
"#include \"a/b/c\" // comment",
format("#include \\\n"
" \"a\" // comment\n"
"#include \"a/b/c\" // comment"));
verifyFormat("enum E {\n"
" // comment\n"
" VAL_A, // comment\n"
" VAL_B\n"
"};");
verifyFormat(
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
" bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb; // Trailing comment");
verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
" // Comment inside a statement.\n"
" bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;");
verifyFormat("SomeFunction(a,\n"
" // comment\n"
" b + x);");
verifyFormat("SomeFunction(a, a,\n"
" // comment\n"
" b + x);");
verifyFormat(
"bool aaaaaaaaaaaaa = // comment\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
verifyFormat("int aaaa; // aaaaa\n"
"int aa; // aaaaaaa",
getLLVMStyleWithColumns(20));
EXPECT_EQ("void f() { // This does something ..\n"
"}\n"
"int a; // This is unrelated",
format("void f() { // This does something ..\n"
" }\n"
"int a; // This is unrelated"));
EXPECT_EQ("class C {\n"
" void f() { // This does something ..\n"
" } // awesome..\n"
"\n"
" int a; // This is unrelated\n"
"};",
format("class C{void f() { // This does something ..\n"
" } // awesome..\n"
" \n"
"int a; // This is unrelated\n"
"};"));
EXPECT_EQ("int i; // single line trailing comment",
format("int i;\\\n// single line trailing comment"));
verifyGoogleFormat("int a; // Trailing comment.");
verifyFormat("someFunction(anotherFunction( // Force break.\n"
" parameter));");
verifyGoogleFormat("#endif // HEADER_GUARD");
verifyFormat("const char *test[] = {\n"
" // A\n"
" \"aaaa\",\n"
" // B\n"
" \"aaaaa\"};");
verifyGoogleFormat(
"aaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaa); // 81_cols_with_this_comment");
EXPECT_EQ("D(a, {\n"
" // test\n"
" int a;\n"
"});",
format("D(a, {\n"
"// test\n"
"int a;\n"