sdk/utils/tests/css/selector_literal_test.dart

// Copyright (c) 2011, 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.

library selector_literal_tests;
import '../../css/css.dart';

final String ERROR = 'CompilerException: <buffer>:';

main() {
  initCssWorld();
  options.useColors = false;

  testSimpleClassSelectorSuccesses();
  testSimpleClassSelectorFailures();
  testPrivateNameFailures();
}

void testSimpleClassSelectorSuccesses() {
  List<String> knownClasses = ['foobar', 'xyzzy', 'a-story', 'b-story'];
  List<String> knownIds = ['id1', 'id2', 'id-number-3'];

  CssWorld cssWorld = new CssWorld(knownClasses, knownIds);

  try {
    // Valid selectors for class names.
    cssParseAndValidate('@{.foobar}', cssWorld);
    cssParseAndValidate('@{.foobar .xyzzy}', cssWorld);
    cssParseAndValidate('@{.foobar .a-story .xyzzy}', cssWorld);
    cssParseAndValidate('@{.foobar .xyzzy .a-story .b-story}', cssWorld);

    // Valid selectors for element IDs.
    cssParseAndValidate('@{#id1}', cssWorld);
    cssParseAndValidate('@{#id-number-3}', cssWorld);
    cssParseAndValidate('@{#_privateId}', cssWorld);

    // Valid selectors for private class names (leading underscore).
    cssParseAndValidate('@{.foobar ._privateClass}', cssWorld);
    cssParseAndValidate('@{.foobar ._privateClass .xyzzy}', cssWorld);
    cssParseAndValidate('@{.foobar ._private1 .xyzzy ._private2}', cssWorld);

    // Valid selectors for private element IDs (leading underscore).
    cssParseAndValidate('@{._privateClass}', cssWorld);
  } catch (e) {
    // CSS Expressions failed
    Expect.fail(e.toString());
  }
}

void testSimpleClassSelectorFailures() {
  List<String> knownClasses = ['foobar', 'xyzzy', 'a-story', 'b-story'];
  List<String> knownIds = ['id1', 'id2', 'id-number-3'];

  CssWorld cssWorld = new CssWorld(knownClasses, knownIds);

  // Invalid class name.
  String css = '@{.-foobar}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Unknown selector name .-foobar",
        e.toString());
  }

  // Error this class name is not known.
  css = '@{.foobar1}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Unknown selector name .foobar1",
        e.toString());
  }

  // Error if any class name is not known.
  css = '@{.foobar .xyzzy1}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Unknown selector name .xyzzy1",
        e.toString());
  }

  // Test for invalid class name (can't start with number).
  css = '@{.foobar .1a-story .xyzzy}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("${ERROR}1:11: fatal: parsing error expected }\n" +
        "${css}\n          ^^", e.toString());
  }

  // element id must be single selector.
  css = '@{#id1 #id2}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Use of Id selector must be " +
        "singleton starting at #id2", e.toString());
  }

  // element id must be single selector.
  css = '@{#id-number-3 .foobar}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("@{#id-number-3 .foobar} should not succeed.");
  } catch (e) {
    // CSS Expressions failed
    Expect.equals("CssSelectorException: Can not mix Id selector with "+
        "class selector(s). Id selector must be singleton too many " +
        "starting at .foobar", e.toString(), '');
  }

  // element id must be alone and only one element id.
  css = '@{.foobar #id-number-3 #id1}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    // CSS Expressions failed
    Expect.equals("CssSelectorException: Use of Id selector must be " +
        "singleton starting at #id-number-3", e.toString());
  }

  // Namespace selector not valid in @{css_expression}
  css = '@{foo|div}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Invalid template selector foo|div",
        e.toString());
  }

  // class and element id not allowed together.
  css = '@{.foobar foo|div}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("$css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Invalid template selector foo|div",
        e.toString());
  }

  // Element id and namespace not allowed together.
  css = '@{#id1 foo|div}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Invalid template selector foo|div",
        e.toString());
  }

  // namespace and element id not allowed together.
  css = '@{foo|div #id1}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Invalid template selector foo|div",
        e.toString());
  }

  // namespace / element not allowed.
  css = '@{foo|div .foobar}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Invalid template selector foo|div",
        e.toString());
  }

  // Combinators not allowed.
  css = '@{.foobar > .xyzzy}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Selectors can not have " +
        "combinators (>, +, or ~) before >.xyzzy", e.toString());
  }
}

void testPrivateNameFailures() {
  List<String> knownClasses = ['foobar', 'xyzzy', 'a-story', 'b-story'];
  List<String> knownIds = ['id1', 'id2', 'id-number-3'];

  CssWorld cssWorld = new CssWorld(knownClasses, knownIds);

  // Too many.
  String css = '@{._private #id2}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Use of Id selector must be " +
        "singleton starting at #id2", e.toString());
  }

  // Unknown class foobar2.
  css = '@{._private .foobar2}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Unknown selector name .foobar2",
        e.toString());
  }

  // Too many element IDs.
  css = '@{#_privateId #id2}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Use of Id selector must be " +
        "singleton starting at #id2", e.toString());
  }

  // Too many element IDs.
  css = '@{#_privateId1 #_privateId2}';
  try {
    cssParseAndValidate('${css}', cssWorld);
    Expect.fail("${css} should not succeed.");
  } catch (e) {
    Expect.equals("CssSelectorException: Use of Id selector must be " +
        "singleton starting at #_privateId2", e.toString());
  }
}