pkgs/csslib/test/selector_test.dart

// Copyright (c) 2012, 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:csslib/parser.dart';
import 'package:term_glyph/term_glyph.dart' as glyph;
import 'package:test/test.dart';

import 'testing.dart';

void testSelectorSuccesses() {
  var errors = <Message>[];
  var selectorAst = selector('#div .foo', errors: errors);
  expect(errors.isEmpty, true, reason: errors.toString());
  expect('#div .foo', compactOutput(selectorAst));

  // Valid selectors for class names.
  selectorAst = selector('.foo', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect('.foo', compactOutput(selectorAst));

  selectorAst = selector('.foobar .xyzzy', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect('.foobar .xyzzy', compactOutput(selectorAst));

  selectorAst = selector('.foobar .a-story .xyzzy', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect('.foobar .a-story .xyzzy', compactOutput(selectorAst));

  selectorAst =
      selector('.foobar .xyzzy .a-story .b-story', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect('.foobar .xyzzy .a-story .b-story', compactOutput(selectorAst));

  // Valid selectors for element IDs.
  selectorAst = selector('#id1', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect('#id1', compactOutput(selectorAst));

  selectorAst = selector('#id-number-3', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect('#id-number-3', compactOutput(selectorAst));

  selectorAst = selector('#_privateId', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect('#_privateId', compactOutput(selectorAst));

  selectorAst = selector(':host', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect(compactOutput(selectorAst), ':host');

  selectorAst = selector(':host(.foo)', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect(compactOutput(selectorAst), ':host(.foo)');

  selectorAst = selector(':host-context(.foo)', errors: errors..clear());
  expect(errors.isEmpty, true, reason: errors.toString());
  expect(compactOutput(selectorAst), ':host-context(.foo)');
}

// TODO(terry): Move this failure case to a failure_test.dart when the analyzer
//              and validator exit then they'll be a bunch more checks.
void testSelectorFailures() {
  var errors = <Message>[];

  // Test for invalid class name (can't start with number).
  selector('.foobar .1a-story .xyzzy', errors: errors);
  expect(errors.isEmpty, false);
  expect(
      errors[0].toString(),
      'error on line 1, column 9: name must start with a alpha character, but '
      'found a number\n'
      '  ,\n'
      '1 | .foobar .1a-story .xyzzy\n'
      '  |         ^^\n'
      '  \'');

  selector(':host()', errors: errors..clear());
  expect(
      errors.first.toString(),
      'error on line 1, column 7: expected a selector argument, but found )\n'
      '  ,\n'
      '1 | :host()\n'
      '  |       ^\n'
      '  \'');
}

void main() {
  glyph.ascii = true;
  test('Valid Selectors', testSelectorSuccesses);
  test('Invalid Selectors', testSelectorFailures);
}