pkg/analysis_server/test/lsp/diagnostic_test.dart

// Copyright (c) 2018, 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:analysis_server/lsp_protocol/protocol_generated.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import 'server_abstract.dart';

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

@reflectiveTest
class DiagnosticTest extends AbstractLspAnalysisServerTest {
  test_afterDocumentEdits() async {
    const initialContents = 'int a = 1;';
    newFile(mainFilePath, content: initialContents);

    final firstDiagnosticsUpdate = waitForDiagnostics(mainFileUri);
    await initialize();
    final initialDiagnostics = await firstDiagnosticsUpdate;
    expect(initialDiagnostics, hasLength(0));

    await openFile(mainFileUri, initialContents);

    final secondDiagnosticsUpdate = waitForDiagnostics(mainFileUri);
    await replaceFile(222, mainFileUri, 'String a = 1;');
    final updatedDiagnostics = await secondDiagnosticsUpdate;
    expect(updatedDiagnostics, hasLength(1));
  }

  test_contextMessage() async {
    newFile(mainFilePath, content: '''
void f() {
  x = 0;
  int x;
  print(x);
}
''');

    final diagnosticsUpdate = waitForDiagnostics(mainFileUri);
    await initialize();
    final diagnostics = await diagnosticsUpdate;
    expect(diagnostics, hasLength(1));
    final diagnostic = diagnostics.first;
    expect(diagnostic.relatedInformation, hasLength(1));
  }

  test_correction() async {
    newFile(mainFilePath, content: '''
void f() {
  x = 0;
}
''');

    final diagnosticsUpdate = waitForDiagnostics(mainFileUri);
    await initialize();
    final diagnostics = await diagnosticsUpdate;
    expect(diagnostics, hasLength(1));
    final diagnostic = diagnostics.first;
    expect(diagnostic.message, contains('\nTry'));
  }

  test_deletedFile() async {
    newFile(mainFilePath, content: 'String a = 1;');

    final firstDiagnosticsUpdate = waitForDiagnostics(mainFileUri);
    await initialize();
    final originalDiagnostics = await firstDiagnosticsUpdate;
    expect(originalDiagnostics, hasLength(1));

    // Deleting the file should result in an update to remove the diagnostics.
    final secondDiagnosticsUpdate = waitForDiagnostics(mainFileUri);
    await deleteFile(mainFilePath);
    final updatedDiagnostics = await secondDiagnosticsUpdate;
    expect(updatedDiagnostics, hasLength(0));
  }

  test_dotFilesExcluded() async {
    var dotFolderFilePath =
        join(projectFolderPath, '.dart_tool', 'tool_file.dart');
    var dotFolderFileUri = Uri.file(dotFolderFilePath);

    newFile(dotFolderFilePath, content: 'String a = 1;');

    List<Diagnostic> diagnostics = null;
    waitForDiagnostics(dotFolderFileUri).then((d) => diagnostics = d);

    // Send a request for a hover.
    await initialize();
    await getHover(dotFolderFileUri, Position(0, 0));

    // Ensure that as part of responding to getHover, diagnostics were not
    // transmitted.
    expect(diagnostics, isNull);
  }

  test_initialAnalysis() async {
    newFile(mainFilePath, content: 'String a = 1;');

    final diagnosticsUpdate = waitForDiagnostics(mainFileUri);
    await initialize();
    final diagnostics = await diagnosticsUpdate;
    expect(diagnostics, hasLength(1));
    final diagnostic = diagnostics.first;
    expect(diagnostic.code, equals('invalid_assignment'));
    expect(diagnostic.range.start.line, equals(0));
    expect(diagnostic.range.start.character, equals(11));
    expect(diagnostic.range.end.line, equals(0));
    expect(diagnostic.range.end.character, equals(12));
  }

  test_todos() async {
    // TODOs only show up if there's also some code in the file.
    const initialContents = '''
    // TODO: This
    String a = "";
    ''';
    newFile(mainFilePath, content: initialContents);

    final firstDiagnosticsUpdate = waitForDiagnostics(mainFileUri);
    await initialize();
    final initialDiagnostics = await firstDiagnosticsUpdate;
    // TODOs should not be sent by LSP.
    expect(initialDiagnostics, hasLength(0));
  }
}