pkg/analyzer/test/src/diagnostics/ambiguous_import_test.dart

// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:analyzer/dart/analysis/results.dart';
import 'package:analyzer/src/error/codes.dart';
import 'package:matcher/src/core_matchers.dart';
import 'package:test/test.dart' show expect;
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../../generated/test_support.dart';
import '../dart/resolution/context_collection_resolution.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(AmbiguousImportTest);
  });
}

@reflectiveTest
class AmbiguousImportTest extends PubPackageResolutionTest {
  test_annotation_getter() async {
    newFile('$testPackageLibPath/a.dart', r'''
const foo = 0;
''');

    newFile('$testPackageLibPath/b.dart', r'''
const foo = 0;
''');

    await assertErrorsInCode(r'''
import 'a.dart';
import 'b.dart';

@foo
class A {}
''', [
      error(CompileTimeErrorCode.INVALID_ANNOTATION, 35, 4),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 36, 3),
    ]);
  }

  test_as() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
import 'lib1.dart';
import 'lib2.dart';
f(p) {p as N;}''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 51, 1),
    ]);
  }

  test_extends() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
import 'lib1.dart';
import 'lib2.dart';
class A extends N {}''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 56, 1),
      error(CompileTimeErrorCode.EXTENDS_NON_CLASS, 56, 1),
    ]);
  }

  test_implements() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
import 'lib1.dart';
import 'lib2.dart';
class A implements N {}''', [
      error(CompileTimeErrorCode.IMPLEMENTS_NON_CLASS, 59, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 59, 1),
    ]);
  }

  test_inPart() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}
''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}
''');
    var partFile = newFile('$testPackageLibPath/part.dart', '''
part of lib;
class A extends N {}
''');
    var libFile = newFile('$testPackageLibPath/lib.dart', '''
library lib;
import 'lib1.dart';
import 'lib2.dart';
part 'part.dart';
''');
    ResolvedUnitResult libResult = await resolveFile(libFile);
    ResolvedUnitResult partResult = await resolveFile(partFile);
    expect(libResult.errors, hasLength(0));
    GatheringErrorListener()
      ..addAll(partResult.errors)
      ..assertErrors([
        error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 29, 1),
        error(CompileTimeErrorCode.EXTENDS_NON_CLASS, 29, 1),
      ]);
  }

  test_instanceCreation() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
library L;
import 'lib1.dart';
import 'lib2.dart';
f() {new N();}''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 60, 1),
    ]);
  }

  test_is() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
import 'lib1.dart';
import 'lib2.dart';
f(p) {p is N;}''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 51, 1),
    ]);
  }

  test_qualifier() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
import 'lib1.dart';
import 'lib2.dart';
g() { N.FOO; }''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 46, 1),
    ]);
  }

  test_systemLibrary_nonSystemLibrary() async {
    // From the spec, "a declaration from a non-system library shadows
    // declarations from system libraries."
    newFile('$testPackageLibPath/a.dart', '''
class StreamController {}
''');
    await assertNoErrorsInCode('''
import 'dart:async'; // ignore: unused_import
import 'a.dart';

StreamController s = StreamController();
''');
  }

  test_systemLibrary_systemLibrary() async {
    await assertErrorsInCode('''
import 'dart:html';
import 'dart:io';
g(File f) {}
''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 40, 4),
    ]);
  }

  test_typeAnnotation() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
import 'lib1.dart';
import 'lib2.dart';
typedef N FT(N p);
N f(N p) {
  N v;
  return null;
}
class A {
  N m() { return null; }
}
class B<T extends N> {}''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 48, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 53, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 59, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 63, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 72, 1),
      error(WarningCode.UNUSED_LOCAL_VARIABLE, 74, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 106, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 149, 1),
    ]);
  }

  test_typeArgument_annotation() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
import 'lib1.dart';
import 'lib2.dart';
class A<T> {}
A<N>? f() { return null; }''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 56, 1),
    ]);
  }

  test_typeArgument_instanceCreation() async {
    newFile("$testPackageLibPath/lib1.dart", '''
library lib1;
class N {}''');
    newFile("$testPackageLibPath/lib2.dart", '''
library lib2;
class N {}''');
    await assertErrorsInCode('''
import 'lib1.dart';
import 'lib2.dart';
class A<T> {}
f() {new A<N>();}''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 65, 1),
    ]);
  }

  test_variable_read() async {
    newFile('$testPackageLibPath/a.dart', '''
var x;
''');

    newFile('$testPackageLibPath/b.dart', '''
var x;
''');

    await assertErrorsInCode('''
import 'a.dart';
import 'b.dart';

void f() {
  x;
}
''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 48, 1),
    ]);
  }

  test_variable_read_prefixed() async {
    newFile('$testPackageLibPath/a.dart', '''
var x;
''');

    newFile('$testPackageLibPath/b.dart', '''
var x;
''');

    await assertErrorsInCode('''
import 'a.dart' as p;
import 'b.dart' as p;

void f() {
  p.x;
}
''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 60, 1),
    ]);
  }

  test_variable_write() async {
    newFile('$testPackageLibPath/a.dart', '''
var x;
''');

    newFile('$testPackageLibPath/b.dart', '''
var x;
''');

    await assertErrorsInCode('''
import 'a.dart';
import 'b.dart';

void f() {
  x = 0;
  x += 1;
  ++x;
  x++;
}
''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 48, 1,
          messageContains: ["'x'"]),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 57, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 69, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 74, 1),
    ]);
  }

  test_variable_write_prefixed() async {
    newFile('$testPackageLibPath/a.dart', '''
var x;
''');

    newFile('$testPackageLibPath/b.dart', '''
var x;
''');

    await assertErrorsInCode('''
import 'a.dart' as p;
import 'b.dart' as p;

void f() {
  p.x = 0;
  p.x += 1;
  ++p.x;
  p.x++;
}
''', [
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 60, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 71, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 85, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_IMPORT, 92, 1),
    ]);
  }
}