clang/unittests/Format/SortImportsTestJS.cpp - llvm-project - Git at Google

 //===- unittest/Format/SortImportsTestJS.cpp - JS import sort 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 SortImportsTestJS : public ::testing::Test {
 protected:
   std::string sort(StringRef Code, unsigned Offset = 0, unsigned Length = 0) {
     StringRef FileName = "input.js";
     if (Length == 0U)
       Length = Code.size() - Offset;
     std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length));
     auto Sorted =
         applyAllReplacements(Code, sortIncludes(Style, Code, Ranges, FileName));
     EXPECT_TRUE(static_cast<bool>(Sorted));
     auto Formatted = applyAllReplacements(
         *Sorted, reformat(Style, *Sorted, Ranges, FileName));
     EXPECT_TRUE(static_cast<bool>(Formatted));
     return *Formatted;
   }

   void verifySort(llvm::StringRef Expected, llvm::StringRef Code,
                   unsigned Offset = 0, unsigned Length = 0) {
     std::string Result = sort(Code, Offset, Length);
     EXPECT_EQ(Expected.str(), Result) << "Expected:\n"
                                       << Expected << "\nActual:\n"
                                       << Result;
   }

   FormatStyle Style = getGoogleStyle(FormatStyle::LK_JavaScript);
 };

 TEST_F(SortImportsTestJS, AlreadySorted) {
   verifySort("import {sym} from 'a';\n"
              "import {sym} from 'b';\n"
              "import {sym} from 'c';\n"
              "\n"
              "let x = 1;",
              "import {sym} from 'a';\n"
              "import {sym} from 'b';\n"
              "import {sym} from 'c';\n"
              "\n"
              "let x = 1;");
 }

 TEST_F(SortImportsTestJS, BasicSorting) {
   verifySort("import {sym} from 'a';\n"
              "import {sym} from 'b';\n"
              "import {sym} from 'c';\n"
              "\n"
              "let x = 1;",
              "import {sym} from 'a';\n"
              "import {sym} from 'c';\n"
              "import {sym} from 'b';\n"
              "let x = 1;");
 }

 TEST_F(SortImportsTestJS, DefaultBinding) {
   verifySort("import A from 'a';\n"
              "import B from 'b';\n"
              "\n"
              "let x = 1;",
              "import B from 'b';\n"
              "import A from 'a';\n"
              "let x = 1;");
 }

 TEST_F(SortImportsTestJS, DefaultAndNamedBinding) {
   verifySort("import A, {a} from 'a';\n"
              "import B, {b} from 'b';\n"
              "\n"
              "let x = 1;",
              "import B, {b} from 'b';\n"
              "import A, {a} from 'a';\n"
              "let x = 1;");
 }

 TEST_F(SortImportsTestJS, WrappedImportStatements) {
   verifySort("import {sym1, sym2} from 'a';\n"
              "import {sym} from 'b';\n"
              "\n"
              "1;",
              "import\n"
              "  {sym}\n"
              "  from 'b';\n"
              "import {\n"
              "  sym1,\n"
              "  sym2\n"
              "} from 'a';\n"
              "1;");
 }

 TEST_F(SortImportsTestJS, SeparateMainCodeBody) {
   verifySort("import {sym} from 'a';"
              "\n"
              "let x = 1;\n",
              "import {sym} from 'a'; let x = 1;\n");
 }

 TEST_F(SortImportsTestJS, Comments) {
   verifySort("/** @fileoverview This is a great file. */\n"
              "// A very important import follows.\n"
              "import {sym} from 'a';  /* more comments */\n"
              "import {sym} from 'b';  // from //foo:bar\n",
              "/** @fileoverview This is a great file. */\n"
              "import {sym} from 'b';  // from //foo:bar\n"
              "// A very important import follows.\n"
              "import {sym} from 'a';  /* more comments */\n");
   verifySort("import {sym} from 'a';\n"
              "import {sym} from 'b';\n"
              "\n"
              "/** Comment on variable. */\n"
              "const x = 1;\n",
              "import {sym} from 'b';\n"
              "import {sym} from 'a';\n"
              "\n"
              "/** Comment on variable. */\n"
              "const x = 1;\n");
 }

 TEST_F(SortImportsTestJS, SortStar) {
   verifySort("import * as foo from 'a';\n"
              "import {sym} from 'a';\n"
              "import * as bar from 'b';\n",
              "import {sym} from 'a';\n"
              "import * as foo from 'a';\n"
              "import * as bar from 'b';\n");
 }

 TEST_F(SortImportsTestJS, AliasesSymbols) {
   verifySort("import {sym1 as alias1} from 'b';\n"
              "import {sym2 as alias2, sym3 as alias3} from 'c';\n",
              "import {sym2 as alias2, sym3 as alias3} from 'c';\n"
              "import {sym1 as alias1} from 'b';\n");
 }

 TEST_F(SortImportsTestJS, SortSymbols) {
   verifySort("import {sym1, sym2 as a, sym3} from 'b';\n",
              "import {sym2 as a, sym1, sym3} from 'b';\n");
   verifySort("import {sym1 /* important! */, /*!*/ sym2 as a} from 'b';\n",
              "import {/*!*/ sym2 as a, sym1 /* important! */} from 'b';\n");
   verifySort("import {sym1, sym2} from 'b';\n", "import {\n"
                                                 "  sym2 \n"
                                                 ",\n"
                                                 " sym1 \n"
                                                 "} from 'b';\n");
 }

 TEST_F(SortImportsTestJS, GroupImports) {
   verifySort("import {a} from 'absolute';\n"
              "\n"
              "import {b} from '../parent';\n"
              "import {b} from '../parent/nested';\n"
              "\n"
              "import {b} from './relative/path';\n"
              "import {b} from './relative/path/nested';\n"
              "\n"
              "let x = 1;\n",
              "import {b} from './relative/path/nested';\n"
              "import {b} from './relative/path';\n"
              "import {b} from '../parent/nested';\n"
              "import {b} from '../parent';\n"
              "import {a} from 'absolute';\n"
              "let x = 1;\n");
 }

 TEST_F(SortImportsTestJS, Exports) {
   verifySort("import {S} from 'bpath';\n"
              "\n"
              "import {T} from './cpath';\n"
              "\n"
              "export {A, B} from 'apath';\n"
              "export {P} from '../parent';\n"
              "export {R} from './relative';\n"
              "export {S};\n"
              "\n"
              "let x = 1;\n"
              "export y = 1;\n",
              "export {R} from './relative';\n"
              "import {T} from './cpath';\n"
              "export {S};\n"
              "export {A, B} from 'apath';\n"
              "import {S} from 'bpath';\n"
              "export {P} from '../parent';\n"
              "let x = 1;\n"
              "export y = 1;\n");
   verifySort("import {S} from 'bpath';\n"
              "\n"
              "export {T} from 'epath';\n",
              "export {T} from 'epath';\n"
              "import {S} from 'bpath';\n");
 }

 TEST_F(SortImportsTestJS, SideEffectImports) {
   verifySort("import 'ZZside-effect';\n"
              "import 'AAside-effect';\n"
              "\n"
              "import {A} from 'absolute';\n"
              "\n"
              "import {R} from './relative';\n",
              "import {R} from './relative';\n"
              "import 'ZZside-effect';\n"
              "import {A} from 'absolute';\n"
              "import 'AAside-effect';\n");
 }

 TEST_F(SortImportsTestJS, AffectedRange) {
   // Affected range inside of import statements.
   verifySort("import {sym} from 'a';\n"
              "import {sym} from 'b';\n"
              "import {sym} from 'c';\n"
              "\n"
              "let x = 1;",
              "import {sym} from 'c';\n"
              "import {sym} from 'b';\n"
              "import {sym} from 'a';\n"
              "let x = 1;",
              0, 30);
   // Affected range outside of import statements.
   verifySort("import {sym} from 'c';\n"
              "import {sym} from 'b';\n"
              "import {sym} from 'a';\n"
              "\n"
              "let x = 1;",
              "import {sym} from 'c';\n"
              "import {sym} from 'b';\n"
              "import {sym} from 'a';\n"
              "\n"
              "let x = 1;",
              70, 1);
 }

 TEST_F(SortImportsTestJS, SortingCanShrink) {
   // Sort excluding a suffix.
   verifySort("import {B} from 'a';\n"
              "import {A} from 'b';\n"
              "\n"
              "1;",
              "import {A} from 'b';\n"
              "\n"
              "import {B} from 'a';\n"
              "\n"
              "1;");
 }

 TEST_F(SortImportsTestJS, TrailingComma) {
   verifySort("import {A, B,} from 'aa';\n", "import {B, A,} from 'aa';\n");
 }

 TEST_F(SortImportsTestJS, SortCaseInsensitive) {
   verifySort("import {A} from 'aa';\n"
              "import {A} from 'Ab';\n"
              "import {A} from 'b';\n"
              "import {A} from 'Bc';\n"
              "\n"
              "1;",
              "import {A} from 'b';\n"
              "import {A} from 'Bc';\n"
              "import {A} from 'Ab';\n"
              "import {A} from 'aa';\n"
              "\n"
              "1;");
   verifySort("import {aa, Ab, b, Bc} from 'x';\n"
              "\n"
              "1;",
              "import {b, Bc, Ab, aa} from 'x';\n"
              "\n"
              "1;");
 }

 TEST_F(SortImportsTestJS, SortMultiLine) {
   // Reproduces issue where multi-line import was not parsed correctly.
   verifySort("import {A} from 'a';\n"
              "import {A} from 'b';\n"
              "\n"
              "1;",
              "import\n"
              "{\n"
              "A\n"
              "}\n"
              "from\n"
              "'b';\n"
              "import {A} from 'a';\n"
              "\n"
              "1;");
 }

 TEST_F(SortImportsTestJS, SortDefaultImports) {
   // Reproduces issue where multi-line import was not parsed correctly.
   verifySort("import {A} from 'a';\n"
              "import {default as B} from 'b';\n",
              "import {default as B} from 'b';\n"
              "import {A} from 'a';\n");
 }

 TEST_F(SortImportsTestJS, MergeImports) {
   // basic operation
   verifySort("import {X, Y} from 'a';\n"
              "import {Z} from 'z';\n"
              "\n"
              "X + Y + Z;\n",
              "import {X} from 'a';\n"
              "import {Z} from 'z';\n"
              "import {Y} from 'a';\n"
              "\n"
              "X + Y + Z;\n");

   // merge only, no resorting.
   verifySort("import {A, B} from 'foo';\n", "import {A} from 'foo';\n"
                                             "import {B} from 'foo';");

   // empty imports
   verifySort("import {A} from 'foo';\n", "import {} from 'foo';\n"
                                          "import {A} from 'foo';");

   // ignores import *
   verifySort("import * as foo from 'foo';\n"
              "import {A} from 'foo';\n",
              "import   * as foo from 'foo';\n"
              "import {A} from 'foo';\n");

   // ignores default import
   verifySort("import X from 'foo';\n"
              "import {A} from 'foo';\n",
              "import    X from 'foo';\n"
              "import {A} from 'foo';\n");

   // keeps comments
   // known issue: loses the 'also a' comment.
   verifySort("// a\n"
              "import {/* x */ X, /* y */ Y} from 'a';\n"
              "// z\n"
              "import {Z} from 'z';\n"
              "\n"
              "X + Y + Z;\n",
              "// a\n"
              "import {/* y */ Y} from 'a';\n"
              "// z\n"
              "import {Z} from 'z';\n"
              "// also a\n"
              "import {/* x */ X} from 'a';\n"
              "\n"
              "X + Y + Z;\n");

   // do not merge imports and exports
   verifySort("import {A} from 'foo';\n"
              "\n"
              "export {B} from 'foo';\n",
              "import {A} from 'foo';\n"
              "export   {B} from 'foo';");
   // do merge exports
   verifySort("export {A, B} from 'foo';\n", "export {A} from 'foo';\n"
                                             "export   {B} from 'foo';");

   // do not merge side effect imports with named ones
   verifySort("import './a';\n"
              "\n"
              "import {bar} from './a';\n",
              "import {bar} from './a';\n"
              "import './a';\n");
 }

 TEST_F(SortImportsTestJS, RespectsClangFormatOff) {
   verifySort("// clang-format off\n"
              "import {B} from './b';\n"
              "import {A} from './a';\n"
              "// clang-format on\n",
              "// clang-format off\n"
              "import {B} from './b';\n"
              "import {A} from './a';\n"
              "// clang-format on\n");

   verifySort("import {A} from './sorted1_a';\n"
              "import {B} from './sorted1_b';\n"
              "// clang-format off\n"
              "import {B} from './unsorted_b';\n"
              "import {A} from './unsorted_a';\n"
              "// clang-format on\n"
              "import {A} from './sorted2_a';\n"
              "import {B} from './sorted2_b';\n",
              "import {B} from './sorted1_b';\n"
              "import {A} from './sorted1_a';\n"
              "// clang-format off\n"
              "import {B} from './unsorted_b';\n"
              "import {A} from './unsorted_a';\n"
              "// clang-format on\n"
              "import {B} from './sorted2_b';\n"
              "import {A} from './sorted2_a';\n");

   // Boundary cases
   verifySort("// clang-format on\n", "// clang-format on\n");
   verifySort("// clang-format off\n", "// clang-format off\n");
   verifySort("// clang-format on\n"
              "// clang-format off\n",
              "// clang-format on\n"
              "// clang-format off\n");
   verifySort("// clang-format off\n"
              "// clang-format on\n"
              "import {A} from './a';\n"
              "import {B} from './b';\n",
              "// clang-format off\n"
              "// clang-format on\n"
              "import {B} from './b';\n"
              "import {A} from './a';\n");
   // section ends with comment
   verifySort("// clang-format on\n"
              "import {A} from './a';\n"
              "import {B} from './b';\n"
              "import {C} from './c';\n"
              "\n" // inserted empty line is working as intended: splits imports
                   // section from main code body
              "// clang-format off\n",
              "// clang-format on\n"
              "import {C} from './c';\n"
              "import {B} from './b';\n"
              "import {A} from './a';\n"
              "// clang-format off\n");
 }

 TEST_F(SortImportsTestJS, RespectsClangFormatOffInNamedImports) {
   verifySort("// clang-format off\n"
              "import {B, A} from './b';\n"
              "// clang-format on\n"
              "const x = 1;",
              "// clang-format off\n"
              "import {B, A} from './b';\n"
              "// clang-format on\n"
              "const x =   1;");
 }

 } // end namespace
 } // end namespace format
 } // end namespace clang
	//===- unittest/Format/SortImportsTestJS.cpp - JS import sort 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 SortImportsTestJS : public ::testing::Test {
	protected:
	std::string sort(StringRef Code, unsigned Offset = 0, unsigned Length = 0) {
	StringRef FileName = "input.js";
	if (Length == 0U)
	Length = Code.size() - Offset;
	std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length));
	auto Sorted =
	applyAllReplacements(Code, sortIncludes(Style, Code, Ranges, FileName));
	EXPECT_TRUE(static_cast<bool>(Sorted));
	auto Formatted = applyAllReplacements(
	Sorted, reformat(Style, Sorted, Ranges, FileName));
	EXPECT_TRUE(static_cast<bool>(Formatted));
	return *Formatted;
	}

	void verifySort(llvm::StringRef Expected, llvm::StringRef Code,
	unsigned Offset = 0, unsigned Length = 0) {
	std::string Result = sort(Code, Offset, Length);
	EXPECT_EQ(Expected.str(), Result) << "Expected:\n"
	<< Expected << "\nActual:\n"
	<< Result;
	}

	FormatStyle Style = getGoogleStyle(FormatStyle::LK_JavaScript);
	};

	TEST_F(SortImportsTestJS, AlreadySorted) {
	verifySort("import {sym} from 'a';\n"
	"import {sym} from 'b';\n"
	"import {sym} from 'c';\n"
	"\n"
	"let x = 1;",
	"import {sym} from 'a';\n"
	"import {sym} from 'b';\n"
	"import {sym} from 'c';\n"
	"\n"
	"let x = 1;");
	}

	TEST_F(SortImportsTestJS, BasicSorting) {
	verifySort("import {sym} from 'a';\n"
	"import {sym} from 'b';\n"
	"import {sym} from 'c';\n"
	"\n"
	"let x = 1;",
	"import {sym} from 'a';\n"
	"import {sym} from 'c';\n"
	"import {sym} from 'b';\n"
	"let x = 1;");
	}

	TEST_F(SortImportsTestJS, DefaultBinding) {
	verifySort("import A from 'a';\n"
	"import B from 'b';\n"
	"\n"
	"let x = 1;",
	"import B from 'b';\n"
	"import A from 'a';\n"
	"let x = 1;");
	}

	TEST_F(SortImportsTestJS, DefaultAndNamedBinding) {
	verifySort("import A, {a} from 'a';\n"
	"import B, {b} from 'b';\n"
	"\n"
	"let x = 1;",
	"import B, {b} from 'b';\n"
	"import A, {a} from 'a';\n"
	"let x = 1;");
	}

	TEST_F(SortImportsTestJS, WrappedImportStatements) {
	verifySort("import {sym1, sym2} from 'a';\n"
	"import {sym} from 'b';\n"
	"\n"
	"1;",
	"import\n"
	" {sym}\n"
	" from 'b';\n"
	"import {\n"
	" sym1,\n"
	" sym2\n"
	"} from 'a';\n"
	"1;");
	}

	TEST_F(SortImportsTestJS, SeparateMainCodeBody) {
	verifySort("import {sym} from 'a';"
	"\n"
	"let x = 1;\n",
	"import {sym} from 'a'; let x = 1;\n");
	}

	TEST_F(SortImportsTestJS, Comments) {
	verifySort("/** @fileoverview This is a great file. */\n"
	"// A very important import follows.\n"
	"import {sym} from 'a'; /* more comments */\n"
	"import {sym} from 'b'; // from //foo:bar\n",
	"/** @fileoverview This is a great file. */\n"
	"import {sym} from 'b'; // from //foo:bar\n"
	"// A very important import follows.\n"
	"import {sym} from 'a'; /* more comments */\n");
	verifySort("import {sym} from 'a';\n"
	"import {sym} from 'b';\n"
	"\n"
	"/** Comment on variable. */\n"
	"const x = 1;\n",
	"import {sym} from 'b';\n"
	"import {sym} from 'a';\n"
	"\n"
	"/** Comment on variable. */\n"
	"const x = 1;\n");
	}

	TEST_F(SortImportsTestJS, SortStar) {
	verifySort("import * as foo from 'a';\n"
	"import {sym} from 'a';\n"
	"import * as bar from 'b';\n",
	"import {sym} from 'a';\n"
	"import * as foo from 'a';\n"
	"import * as bar from 'b';\n");
	}

	TEST_F(SortImportsTestJS, AliasesSymbols) {
	verifySort("import {sym1 as alias1} from 'b';\n"
	"import {sym2 as alias2, sym3 as alias3} from 'c';\n",
	"import {sym2 as alias2, sym3 as alias3} from 'c';\n"
	"import {sym1 as alias1} from 'b';\n");
	}

	TEST_F(SortImportsTestJS, SortSymbols) {
	verifySort("import {sym1, sym2 as a, sym3} from 'b';\n",
	"import {sym2 as a, sym1, sym3} from 'b';\n");
	verifySort("import {sym1 /* important! /, /!*/ sym2 as a} from 'b';\n",
	"import {/!/ sym2 as a, sym1 /* important! */} from 'b';\n");
	verifySort("import {sym1, sym2} from 'b';\n", "import {\n"
	" sym2 \n"
	",\n"
	" sym1 \n"
	"} from 'b';\n");
	}

	TEST_F(SortImportsTestJS, GroupImports) {
	verifySort("import {a} from 'absolute';\n"
	"\n"
	"import {b} from '../parent';\n"
	"import {b} from '../parent/nested';\n"
	"\n"
	"import {b} from './relative/path';\n"
	"import {b} from './relative/path/nested';\n"
	"\n"
	"let x = 1;\n",
	"import {b} from './relative/path/nested';\n"
	"import {b} from './relative/path';\n"
	"import {b} from '../parent/nested';\n"
	"import {b} from '../parent';\n"
	"import {a} from 'absolute';\n"
	"let x = 1;\n");
	}

	TEST_F(SortImportsTestJS, Exports) {
	verifySort("import {S} from 'bpath';\n"
	"\n"
	"import {T} from './cpath';\n"
	"\n"
	"export {A, B} from 'apath';\n"
	"export {P} from '../parent';\n"
	"export {R} from './relative';\n"
	"export {S};\n"
	"\n"
	"let x = 1;\n"
	"export y = 1;\n",
	"export {R} from './relative';\n"
	"import {T} from './cpath';\n"
	"export {S};\n"
	"export {A, B} from 'apath';\n"
	"import {S} from 'bpath';\n"
	"export {P} from '../parent';\n"
	"let x = 1;\n"
	"export y = 1;\n");
	verifySort("import {S} from 'bpath';\n"
	"\n"
	"export {T} from 'epath';\n",
	"export {T} from 'epath';\n"
	"import {S} from 'bpath';\n");
	}

	TEST_F(SortImportsTestJS, SideEffectImports) {
	verifySort("import 'ZZside-effect';\n"
	"import 'AAside-effect';\n"
	"\n"
	"import {A} from 'absolute';\n"
	"\n"
	"import {R} from './relative';\n",
	"import {R} from './relative';\n"
	"import 'ZZside-effect';\n"
	"import {A} from 'absolute';\n"
	"import 'AAside-effect';\n");
	}

	TEST_F(SortImportsTestJS, AffectedRange) {
	// Affected range inside of import statements.
	verifySort("import {sym} from 'a';\n"
	"import {sym} from 'b';\n"
	"import {sym} from 'c';\n"
	"\n"
	"let x = 1;",
	"import {sym} from 'c';\n"
	"import {sym} from 'b';\n"
	"import {sym} from 'a';\n"
	"let x = 1;",
	0, 30);
	// Affected range outside of import statements.
	verifySort("import {sym} from 'c';\n"
	"import {sym} from 'b';\n"
	"import {sym} from 'a';\n"
	"\n"
	"let x = 1;",
	"import {sym} from 'c';\n"
	"import {sym} from 'b';\n"
	"import {sym} from 'a';\n"
	"\n"
	"let x = 1;",
	70, 1);
	}

	TEST_F(SortImportsTestJS, SortingCanShrink) {
	// Sort excluding a suffix.
	verifySort("import {B} from 'a';\n"
	"import {A} from 'b';\n"
	"\n"
	"1;",
	"import {A} from 'b';\n"
	"\n"
	"import {B} from 'a';\n"
	"\n"
	"1;");
	}

	TEST_F(SortImportsTestJS, TrailingComma) {
	verifySort("import {A, B,} from 'aa';\n", "import {B, A,} from 'aa';\n");
	}

	TEST_F(SortImportsTestJS, SortCaseInsensitive) {
	verifySort("import {A} from 'aa';\n"
	"import {A} from 'Ab';\n"
	"import {A} from 'b';\n"
	"import {A} from 'Bc';\n"
	"\n"
	"1;",
	"import {A} from 'b';\n"
	"import {A} from 'Bc';\n"
	"import {A} from 'Ab';\n"
	"import {A} from 'aa';\n"
	"\n"
	"1;");
	verifySort("import {aa, Ab, b, Bc} from 'x';\n"
	"\n"
	"1;",
	"import {b, Bc, Ab, aa} from 'x';\n"
	"\n"
	"1;");
	}

	TEST_F(SortImportsTestJS, SortMultiLine) {
	// Reproduces issue where multi-line import was not parsed correctly.
	verifySort("import {A} from 'a';\n"
	"import {A} from 'b';\n"
	"\n"
	"1;",
	"import\n"
	"{\n"
	"A\n"
	"}\n"
	"from\n"
	"'b';\n"
	"import {A} from 'a';\n"
	"\n"
	"1;");
	}

	TEST_F(SortImportsTestJS, SortDefaultImports) {
	// Reproduces issue where multi-line import was not parsed correctly.
	verifySort("import {A} from 'a';\n"
	"import {default as B} from 'b';\n",
	"import {default as B} from 'b';\n"
	"import {A} from 'a';\n");
	}

	TEST_F(SortImportsTestJS, MergeImports) {
	// basic operation
	verifySort("import {X, Y} from 'a';\n"
	"import {Z} from 'z';\n"
	"\n"
	"X + Y + Z;\n",
	"import {X} from 'a';\n"
	"import {Z} from 'z';\n"
	"import {Y} from 'a';\n"
	"\n"
	"X + Y + Z;\n");

	// merge only, no resorting.
	verifySort("import {A, B} from 'foo';\n", "import {A} from 'foo';\n"
	"import {B} from 'foo';");

	// empty imports
	verifySort("import {A} from 'foo';\n", "import {} from 'foo';\n"
	"import {A} from 'foo';");

	// ignores import *
	verifySort("import * as foo from 'foo';\n"
	"import {A} from 'foo';\n",
	"import * as foo from 'foo';\n"
	"import {A} from 'foo';\n");

	// ignores default import
	verifySort("import X from 'foo';\n"
	"import {A} from 'foo';\n",
	"import X from 'foo';\n"
	"import {A} from 'foo';\n");

	// keeps comments
	// known issue: loses the 'also a' comment.
	verifySort("// a\n"
	"import {/* x / X, / y */ Y} from 'a';\n"
	"// z\n"
	"import {Z} from 'z';\n"
	"\n"
	"X + Y + Z;\n",
	"// a\n"
	"import {/* y */ Y} from 'a';\n"
	"// z\n"
	"import {Z} from 'z';\n"
	"// also a\n"
	"import {/* x */ X} from 'a';\n"
	"\n"
	"X + Y + Z;\n");

	// do not merge imports and exports
	verifySort("import {A} from 'foo';\n"
	"\n"
	"export {B} from 'foo';\n",
	"import {A} from 'foo';\n"
	"export {B} from 'foo';");
	// do merge exports
	verifySort("export {A, B} from 'foo';\n", "export {A} from 'foo';\n"
	"export {B} from 'foo';");

	// do not merge side effect imports with named ones
	verifySort("import './a';\n"
	"\n"
	"import {bar} from './a';\n",
	"import {bar} from './a';\n"
	"import './a';\n");
	}

	TEST_F(SortImportsTestJS, RespectsClangFormatOff) {
	verifySort("// clang-format off\n"
	"import {B} from './b';\n"
	"import {A} from './a';\n"
	"// clang-format on\n",
	"// clang-format off\n"
	"import {B} from './b';\n"
	"import {A} from './a';\n"
	"// clang-format on\n");

	verifySort("import {A} from './sorted1_a';\n"
	"import {B} from './sorted1_b';\n"
	"// clang-format off\n"
	"import {B} from './unsorted_b';\n"
	"import {A} from './unsorted_a';\n"
	"// clang-format on\n"
	"import {A} from './sorted2_a';\n"
	"import {B} from './sorted2_b';\n",
	"import {B} from './sorted1_b';\n"
	"import {A} from './sorted1_a';\n"
	"// clang-format off\n"
	"import {B} from './unsorted_b';\n"
	"import {A} from './unsorted_a';\n"
	"// clang-format on\n"
	"import {B} from './sorted2_b';\n"
	"import {A} from './sorted2_a';\n");

	// Boundary cases
	verifySort("// clang-format on\n", "// clang-format on\n");
	verifySort("// clang-format off\n", "// clang-format off\n");
	verifySort("// clang-format on\n"
	"// clang-format off\n",
	"// clang-format on\n"
	"// clang-format off\n");
	verifySort("// clang-format off\n"
	"// clang-format on\n"
	"import {A} from './a';\n"
	"import {B} from './b';\n",
	"// clang-format off\n"
	"// clang-format on\n"
	"import {B} from './b';\n"
	"import {A} from './a';\n");
	// section ends with comment
	verifySort("// clang-format on\n"
	"import {A} from './a';\n"
	"import {B} from './b';\n"
	"import {C} from './c';\n"
	"\n" // inserted empty line is working as intended: splits imports
	// section from main code body
	"// clang-format off\n",
	"// clang-format on\n"
	"import {C} from './c';\n"
	"import {B} from './b';\n"
	"import {A} from './a';\n"
	"// clang-format off\n");
	}

	TEST_F(SortImportsTestJS, RespectsClangFormatOffInNamedImports) {
	verifySort("// clang-format off\n"
	"import {B, A} from './b';\n"
	"// clang-format on\n"
	"const x = 1;",
	"// clang-format off\n"
	"import {B, A} from './b';\n"
	"// clang-format on\n"
	"const x = 1;");
	}

	} // end namespace
	} // end namespace format
	} // end namespace clang