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1211 lines (1157 loc) · 49.8 KB
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/**
* @license
* Copyright 2015 The AMP HTML Authors. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the license.
*
* Credits:
* This original version of this file was derived from
* https://github.com/tabatkins/parse-css by Tab Atkins,
* licensed under the CC0 license
* (http://creativecommons.org/publicdomain/zero/1.0/).
*/
goog.require('css_selectors.parseATypeSelector');
goog.require('goog.asserts');
goog.require('json_testutil.renderJSON');
goog.require('parse_css.parseAStylesheet');
goog.require('parse_css.tokenize');
goog.provide('parse_css.ParseCssTest');
/**
* A strict comparison between two values.
* Note: Unfortunately assert.strictEqual has some drawbacks, including that
* it truncates the provided arguments (and it's not configurable) and
* with the Closure compiler, it requires a message argument to which
* we'd always have to pass undefined. Too messy, so we roll our own.
*/
function assertStrictEqual(expected, saw) {
assert.ok(expected === saw, 'expected: ' + expected + ' saw: ' + saw);
}
// Simple function which lets us sort the keys in json output from the parser
// in a way that makes the most logical sense for viewing in the output.
function jsonKeyCmp(a, b) {
// Lower numbers will be displayed first in the rendered json output.
const keyPriority = {
'line': 0,
'col': 1,
'tokenType': 2,
'name': 3,
'prelude': 4,
'declarations': 5,
'rules': 6,
'errorType': 7,
'msg': 8,
'type': 9,
'value': 10,
'repr': 11,
'unit': 12,
'eof': 13
};
// Handle cases where only only one of the two keys is recognized.
// Unrecognized keys go last.
if (keyPriority.hasOwnProperty(a) && !keyPriority.hasOwnProperty(b)) {
return -1;
}
if (keyPriority.hasOwnProperty(b) && !keyPriority.hasOwnProperty(a)) {
return 1;
}
// Handle case where both keys are recognized.
if (keyPriority.hasOwnProperty(b) && keyPriority.hasOwnProperty(a)) {
return keyPriority[a] - keyPriority[b];
}
return json_testutil.defaultCmpFn(a, b);
}
function assertJSONEquals(left, right) {
assertStrictEqual(
json_testutil.renderJSON(left, jsonKeyCmp, /*offset=*/4),
json_testutil.renderJSON(right, jsonKeyCmp, /*offset=*/4));
}
/** @type {!Object<string,parse_css.BlockType>} */
const ampAtRuleParsingSpec = {
'font-face': parse_css.BlockType.PARSE_AS_DECLARATIONS,
'media': parse_css.BlockType.PARSE_AS_RULES
};
describe('tokenize', () => {
it('generates tokens for simple example', () => {
const css = 'foo { bar: baz; }';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
assertJSONEquals(
[
{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'foo'},
{'line': 1, 'col': 3, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 4, 'tokenType': 'OPEN_CURLY'},
{'line': 1, 'col': 5, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 6, 'tokenType': 'IDENT', 'value': 'bar'},
{'line': 1, 'col': 9, 'tokenType': 'COLON'},
{'line': 1, 'col': 10, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 11, 'tokenType': 'IDENT', 'value': 'baz'},
{'line': 1, 'col': 14, 'tokenType': 'SEMICOLON'},
{'line': 1, 'col': 15, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 16, 'tokenType': 'CLOSE_CURLY'},
{'line': 1, 'col': 17, 'tokenType': 'EOF_TOKEN'}
],
tokenlist);
assertStrictEqual(0, errors.length);
});
it('tokenizes with parse errors', () => {
const css = ' "\n "';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
assertJSONEquals(
[{'line': 1, 'col': 0, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 2, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 1, 'tokenType': 'STRING', 'value': ''},
{'line': 2, 'col': 2, 'tokenType': 'EOF_TOKEN'}],
tokenlist);
assertJSONEquals(
[{'line': 1, 'col': 1, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_UNTERMINATED_STRING', 'params': ['style']}],
errors);
});
it('provides errors with line col offsets', () => {
const css =
'line 1 "unterminated\n' +
'line 2 "unterminated\n';
let errors = [];
parse_css.tokenize(css, 1, 0, errors);
assertJSONEquals([
{'line': 1, 'col': 7, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_UNTERMINATED_STRING', 'params': ['style']},
{'line': 2, 'col': 7, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_UNTERMINATED_STRING', 'params': ['style']}], errors);
errors = [];
parse_css.tokenize(css, 5, 5, errors);
assertJSONEquals(
[{'line': 5, 'col': 12, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_UNTERMINATED_STRING',
'params': ['style']},
{'line': 6, 'col': 7, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_UNTERMINATED_STRING',
'params': ['style']}],
errors);
});
it('deals w/ stray backslashes, unterminated comments and bad urls', () => {
// Note that Javascript has its own escaping, so there's really just one '\'.
let errors = [];
parse_css.tokenize('a trailing \\\nbackslash', 1, 0, errors);
assertJSONEquals(
[{'line': 1, 'col': 11, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_STRAY_TRAILING_BACKSLASH', 'params': ['style']}],
errors);
errors = [];
parse_css.tokenize('h1 {color: red; } /*', 1, 0, errors);
assertJSONEquals(
[{'line': 1, 'col': 17, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_UNTERMINATED_COMMENT', 'params': ['style']}],
errors);
errors = [];
parse_css.tokenize('oh hi url(foo"bar)', 1, 0, errors);
assertJSONEquals(
[{'line': 1, 'col': 6, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_BAD_URL', 'params': ['style']}], errors);
});
});
describe('parseAStylesheet', () => {
it('parses rgb values', () => {
const css = 'foo { bar: rgb(255, 0, 127); }';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
assertJSONEquals(
{
'line': 1,
'col': 0,
'tokenType': 'STYLESHEET',
'rules': [{
'line': 1,
'col': 0,
'tokenType': 'QUALIFIED_RULE',
'prelude': [
{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'foo'},
{'line': 1, 'col': 3, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 4, 'tokenType': 'EOF_TOKEN'}
],
'declarations': [{
'line': 1,
'col': 6,
'tokenType': 'DECLARATION',
'name': 'bar',
'value': [
{'line': 1, 'col': 10, 'tokenType': 'WHITESPACE'}, {
'line': 1,
'col': 11,
'tokenType': 'FUNCTION_TOKEN',
'value': 'rgb'
},
{
'line': 1,
'col': 15,
'tokenType': 'NUMBER',
'type': 'integer',
'value': 255,
'repr': '255'
},
{'line': 1, 'col': 18, 'tokenType': 'COMMA'},
{'line': 1, 'col': 19, 'tokenType': 'WHITESPACE'}, {
'line': 1,
'col': 20,
'tokenType': 'NUMBER',
'type': 'integer',
'value': 0,
'repr': '0'
},
{'line': 1, 'col': 21, 'tokenType': 'COMMA'},
{'line': 1, 'col': 22, 'tokenType': 'WHITESPACE'}, {
'line': 1,
'col': 23,
'tokenType': 'NUMBER',
'type': 'integer',
'value': 127,
'repr': '127'
},
{'line': 1, 'col': 26, 'tokenType': 'CLOSE_PAREN'},
{'line': 1, 'col': 27, 'tokenType': 'EOF_TOKEN'}
],
'important': false
}]
}],
'eof': {'line': 1, 'col': 30, 'tokenType': 'EOF_TOKEN'}
},
sheet);
});
it('parses a hash reference', () => {
const css = '#foo {}';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
assertJSONEquals(
{'line': 1, 'col': 0, 'tokenType': 'STYLESHEET', 'rules':
[{'line': 1, 'col': 0, 'tokenType': 'QUALIFIED_RULE', 'prelude':
[{'line': 1, 'col': 0, 'tokenType': 'HASH', 'type': 'id',
'value': 'foo'},
{'line': 1, 'col': 4, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 5, 'tokenType': 'EOF_TOKEN'}], 'declarations':
[]}], 'eof':
{'line': 1, 'col': 7, 'tokenType': 'EOF_TOKEN'}},
sheet);
});
it('parses an @media rule', () => {
const css = '@media {}';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
assertJSONEquals(
{'line': 1, 'col': 0, 'tokenType': 'STYLESHEET', 'rules':
[{'line': 1, 'col': 0, 'tokenType': 'AT_RULE', 'name': 'media',
'prelude':
[{'line': 1, 'col': 6, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 7, 'tokenType': 'EOF_TOKEN'}], 'declarations':
[], 'rules':
[]}], 'eof':
{'line': 1, 'col': 9, 'tokenType': 'EOF_TOKEN'}},
sheet);
});
it('parses nested media rules and declarations', () => {
const css = 'h1 { color: red; }\n' +
'@media print {\n' +
' @media print {\n' +
' h2.bar { size: 4px; }\n' +
' }\n' +
'}\n' +
'@font-face {\n' +
' font-family: \'MyFont\';\n' +
' src: url(\'foo.ttf\');\n' +
'}';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
assertJSONEquals(
[
{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'h1'},
{'line': 1, 'col': 2, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 3, 'tokenType': 'OPEN_CURLY'},
{'line': 1, 'col': 4, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 5, 'tokenType': 'IDENT', 'value': 'color'},
{'line': 1, 'col': 10, 'tokenType': 'COLON'},
{'line': 1, 'col': 11, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 12, 'tokenType': 'IDENT', 'value': 'red'},
{'line': 1, 'col': 15, 'tokenType': 'SEMICOLON'},
{'line': 1, 'col': 16, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 17, 'tokenType': 'CLOSE_CURLY'},
{'line': 1, 'col': 18, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 0, 'tokenType': 'AT_KEYWORD', 'value': 'media'},
{'line': 2, 'col': 6, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 7, 'tokenType': 'IDENT', 'value': 'print'},
{'line': 2, 'col': 12, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 13, 'tokenType': 'OPEN_CURLY'},
{'line': 2, 'col': 14, 'tokenType': 'WHITESPACE'},
{'line': 3, 'col': 2, 'tokenType': 'AT_KEYWORD', 'value': 'media'},
{'line': 3, 'col': 8, 'tokenType': 'WHITESPACE'},
{'line': 3, 'col': 9, 'tokenType': 'IDENT', 'value': 'print'},
{'line': 3, 'col': 14, 'tokenType': 'WHITESPACE'},
{'line': 3, 'col': 15, 'tokenType': 'OPEN_CURLY'},
{'line': 3, 'col': 16, 'tokenType': 'WHITESPACE'},
{'line': 4, 'col': 4, 'tokenType': 'IDENT', 'value': 'h2'},
{'line': 4, 'col': 6, 'tokenType': 'DELIM', 'value': '.'},
{'line': 4, 'col': 7, 'tokenType': 'IDENT', 'value': 'bar'},
{'line': 4, 'col': 10, 'tokenType': 'WHITESPACE'},
{'line': 4, 'col': 11, 'tokenType': 'OPEN_CURLY'},
{'line': 4, 'col': 12, 'tokenType': 'WHITESPACE'},
{'line': 4, 'col': 13, 'tokenType': 'IDENT', 'value': 'size'},
{'line': 4, 'col': 17, 'tokenType': 'COLON'},
{'line': 4, 'col': 18, 'tokenType': 'WHITESPACE'},
{
'line': 4,
'col': 19,
'tokenType': 'DIMENSION',
'type': 'integer',
'value': 4,
'repr': '4',
'unit': 'px'
},
{'line': 4, 'col': 22, 'tokenType': 'SEMICOLON'},
{'line': 4, 'col': 23, 'tokenType': 'WHITESPACE'},
{'line': 4, 'col': 24, 'tokenType': 'CLOSE_CURLY'},
{'line': 4, 'col': 25, 'tokenType': 'WHITESPACE'},
{'line': 5, 'col': 2, 'tokenType': 'CLOSE_CURLY'},
{'line': 5, 'col': 3, 'tokenType': 'WHITESPACE'},
{'line': 6, 'col': 0, 'tokenType': 'CLOSE_CURLY'},
{'line': 6, 'col': 1, 'tokenType': 'WHITESPACE'},
{
'line': 7,
'col': 0,
'tokenType': 'AT_KEYWORD',
'value': 'font-face'
},
{'line': 7, 'col': 10, 'tokenType': 'WHITESPACE'},
{'line': 7, 'col': 11, 'tokenType': 'OPEN_CURLY'},
{'line': 7, 'col': 12, 'tokenType': 'WHITESPACE'},
{'line': 8, 'col': 2, 'tokenType': 'IDENT', 'value': 'font-family'},
{'line': 8, 'col': 13, 'tokenType': 'COLON'},
{'line': 8, 'col': 14, 'tokenType': 'WHITESPACE'},
{'line': 8, 'col': 15, 'tokenType': 'STRING', 'value': 'MyFont'},
{'line': 8, 'col': 23, 'tokenType': 'SEMICOLON'},
{'line': 8, 'col': 24, 'tokenType': 'WHITESPACE'},
{'line': 9, 'col': 2, 'tokenType': 'IDENT', 'value': 'src'},
{'line': 9, 'col': 5, 'tokenType': 'COLON'},
{'line': 9, 'col': 6, 'tokenType': 'WHITESPACE'},
{'line': 9, 'col': 7, 'tokenType': 'FUNCTION_TOKEN', 'value': 'url'},
{'line': 9, 'col': 11, 'tokenType': 'STRING', 'value': 'foo.ttf'},
{'line': 9, 'col': 20, 'tokenType': 'CLOSE_PAREN'},
{'line': 9, 'col': 21, 'tokenType': 'SEMICOLON'},
{'line': 9, 'col': 22, 'tokenType': 'WHITESPACE'},
{'line': 10, 'col': 0, 'tokenType': 'CLOSE_CURLY'},
{'line': 10, 'col': 1, 'tokenType': 'EOF_TOKEN'}
],
tokenlist);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
assertStrictEqual(0, errors.length);
assertJSONEquals(
{
'line': 1,
'col': 0,
'tokenType': 'STYLESHEET',
'rules': [
{
'line': 1,
'col': 0,
'tokenType': 'QUALIFIED_RULE',
'prelude': [
{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'h1'},
{'line': 1, 'col': 2, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 3, 'tokenType': 'EOF_TOKEN'}
],
'declarations': [{
'line': 1,
'col': 5,
'tokenType': 'DECLARATION',
'name': 'color',
'value': [
{'line': 1, 'col': 11, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 12, 'tokenType': 'IDENT', 'value': 'red'},
{'line': 1, 'col': 15, 'tokenType': 'EOF_TOKEN'}
],
'important': false
}]
},
{
'line': 2,
'col': 0,
'tokenType': 'AT_RULE',
'name': 'media',
'prelude': [
{'line': 2, 'col': 6, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 7, 'tokenType': 'IDENT', 'value': 'print'},
{'line': 2, 'col': 12, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 13, 'tokenType': 'EOF_TOKEN'}
],
'declarations': [],
'rules': [{
'line': 3,
'col': 2,
'tokenType': 'AT_RULE',
'name': 'media',
'prelude': [
{'line': 3, 'col': 8, 'tokenType': 'WHITESPACE'},
{'line': 3, 'col': 9, 'tokenType': 'IDENT', 'value': 'print'},
{'line': 3, 'col': 14, 'tokenType': 'WHITESPACE'},
{'line': 3, 'col': 15, 'tokenType': 'EOF_TOKEN'}
],
'declarations': [],
'rules': [{
'line': 4,
'col': 4,
'tokenType': 'QUALIFIED_RULE',
'prelude': [
{'line': 4, 'col': 4, 'tokenType': 'IDENT', 'value': 'h2'},
{'line': 4, 'col': 6, 'tokenType': 'DELIM', 'value': '.'},
{'line': 4, 'col': 7, 'tokenType': 'IDENT', 'value': 'bar'},
{'line': 4, 'col': 10, 'tokenType': 'WHITESPACE'},
{'line': 4, 'col': 11, 'tokenType': 'EOF_TOKEN'}
],
'declarations': [{
'line': 4,
'col': 13,
'tokenType': 'DECLARATION',
'name': 'size',
'value': [
{'line': 4, 'col': 18, 'tokenType': 'WHITESPACE'}, {
'line': 4,
'col': 19,
'tokenType': 'DIMENSION',
'type': 'integer',
'value': 4,
'repr': '4',
'unit': 'px'
},
{'line': 4, 'col': 22, 'tokenType': 'EOF_TOKEN'}
],
'important': false
}]
}]
}]
},
{
'line': 7,
'col': 0,
'tokenType': 'AT_RULE',
'name': 'font-face',
'prelude': [
{'line': 7, 'col': 10, 'tokenType': 'WHITESPACE'},
{'line': 7, 'col': 11, 'tokenType': 'EOF_TOKEN'}
],
'declarations': [
{
'line': 8,
'col': 2,
'tokenType': 'DECLARATION',
'name': 'font-family',
'value': [
{'line': 8, 'col': 14, 'tokenType': 'WHITESPACE'}, {
'line': 8,
'col': 15,
'tokenType': 'STRING',
'value': 'MyFont'
},
{'line': 8, 'col': 23, 'tokenType': 'EOF_TOKEN'}
],
'important': false
},
{
'line': 9,
'col': 2,
'tokenType': 'DECLARATION',
'name': 'src',
'value': [
{'line': 9, 'col': 6, 'tokenType': 'WHITESPACE'}, {
'line': 9,
'col': 7,
'tokenType': 'FUNCTION_TOKEN',
'value': 'url'
},
{
'line': 9,
'col': 11,
'tokenType': 'STRING',
'value': 'foo.ttf'
},
{'line': 9, 'col': 20, 'tokenType': 'CLOSE_PAREN'},
{'line': 9, 'col': 21, 'tokenType': 'EOF_TOKEN'}
],
'important': false
}
],
'rules': []
}
],
'eof': {'line': 10, 'col': 1, 'tokenType': 'EOF_TOKEN'}
},
sheet);
});
it('generates errors not assertions for invalid css', () => {
const css = '#foo { foo.bar {} }\n' + // qual. rule inside declarations
'@font-face { @media {} }\n' + // @rule inside declarations
'@media { @gregable }\n' + // unrecognized @rule, ignored
'color: red;\n'; // declaration outside qualified rule.
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
assertJSONEquals(
[{'line': 1, 'col': 7, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_INCOMPLETE_DECLARATION', 'params': ['style']},
{'line': 2, 'col': 13, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_INVALID_AT_RULE', 'params': ['style', 'media']},
{'line': 4, 'col': 0, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_EOF_IN_PRELUDE_OF_QUALIFIED_RULE',
'params': ['style']}], errors);
});
it('generates errors based on the grammar', () => {
// @gregable is not supported by the grammar.
const css = '@gregable {}\n.foo{prop}';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
assertJSONEquals(
[{'line': 2, 'col': 5, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_INCOMPLETE_DECLARATION', 'params': ['style']}],
errors);
assertJSONEquals(
{'line': 1, 'col': 0, 'tokenType': 'STYLESHEET', 'rules':
[{'line': 1, 'col': 0, 'tokenType': 'AT_RULE', 'name': 'gregable',
'prelude':
[{'line': 1, 'col': 9, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 10, 'tokenType': 'EOF_TOKEN'}], 'declarations':
[], 'rules':
[]},
{'line': 2, 'col': 0, 'tokenType': 'QUALIFIED_RULE', 'prelude':
[{'line': 2, 'col': 0, 'tokenType': 'DELIM', 'value': '.'},
{'line': 2, 'col': 1, 'tokenType': 'IDENT', 'value': 'foo'},
{'line': 2, 'col': 4, 'tokenType': 'EOF_TOKEN'}], 'declarations':
[]}], 'eof':
{'line': 2, 'col': 10, 'tokenType': 'EOF_TOKEN'}},
sheet);
});
it('handles a nested media rule with declarations', () => {
const css =
'@media print {\n' +
'/* hide navigation controls when printing */\n' +
'#navigation { display: none }\n' +
'@media (max-width: 12cm) {\n' +
' /* keep notes in flow when printing to narrow pages */\n' +
' .note { float: none }\n' +
'}';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
assertJSONEquals(
{'line': 1, 'col': 0, 'tokenType': 'STYLESHEET', 'rules':
[{'line': 1, 'col': 0, 'tokenType': 'AT_RULE', 'name': 'media',
'prelude':
[{'line': 1, 'col': 6, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 7, 'tokenType': 'IDENT', 'value': 'print'},
{'line': 1, 'col': 12, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 13, 'tokenType': 'EOF_TOKEN'}], 'declarations':
[], 'rules':
[{'line': 3, 'col': 0, 'tokenType': 'QUALIFIED_RULE', 'prelude':
[{'line': 3, 'col': 0, 'tokenType': 'HASH', 'type': 'id',
'value': 'navigation'},
{'line': 3, 'col': 11, 'tokenType': 'WHITESPACE'},
{'line': 3, 'col': 12, 'tokenType': 'EOF_TOKEN'}],
'declarations':
[{'line': 3, 'col': 14, 'tokenType': 'DECLARATION', 'name':
'display', 'value':
[{'line': 3, 'col': 22, 'tokenType': 'WHITESPACE'},
{'line': 3, 'col': 23, 'tokenType': 'IDENT', 'value':
'none'},
{'line': 3, 'col': 27, 'tokenType': 'WHITESPACE'},
{'line': 3, 'col': 28, 'tokenType': 'EOF_TOKEN'}],
'important': false}]},
{'line': 4, 'col': 0, 'tokenType': 'AT_RULE', 'name':
'media', 'prelude':
[{'line': 4, 'col': 6, 'tokenType': 'WHITESPACE'},
{'line': 4, 'col': 7, 'tokenType': 'OPEN_PAREN'},
{'line': 4, 'col': 8, 'tokenType': 'IDENT', 'value':
'max-width'},
{'line': 4, 'col': 17, 'tokenType': 'COLON'},
{'line': 4, 'col': 18, 'tokenType': 'WHITESPACE'},
{'line': 4, 'col': 19, 'tokenType': 'DIMENSION', 'type':
'integer', 'value': 12, 'repr': '12', 'unit': 'cm'},
{'line': 4, 'col': 23, 'tokenType': 'CLOSE_PAREN'},
{'line': 4, 'col': 24, 'tokenType': 'WHITESPACE'},
{'line': 4, 'col': 25, 'tokenType': 'EOF_TOKEN'}],
'declarations': [], 'rules':
[{'line': 6, 'col': 2, 'tokenType': 'QUALIFIED_RULE',
'prelude':
[{'line': 6, 'col': 2, 'tokenType': 'DELIM', 'value':
'.'},
{'line': 6, 'col': 3, 'tokenType': 'IDENT', 'value':
'note'},
{'line': 6, 'col': 7, 'tokenType': 'WHITESPACE'},
{'line': 6, 'col': 8, 'tokenType': 'EOF_TOKEN'}],
'declarations':
[{'line': 6, 'col': 10, 'tokenType': 'DECLARATION',
'name': 'float', 'value':
[{'line': 6, 'col': 16, 'tokenType': 'WHITESPACE'},
{'line': 6, 'col': 17, 'tokenType': 'IDENT', 'value':
'none'},
{'line': 6, 'col': 21, 'tokenType': 'WHITESPACE'},
{'line': 6, 'col': 22, 'tokenType': 'EOF_TOKEN'}],
'important': false}]}]}]}], 'eof':
{'line': 7, 'col': 1, 'tokenType': 'EOF_TOKEN'}},
sheet);
assertStrictEqual(0, errors.length);
});
it('handles selectors but does not parse them in detail yet', () => {
const css = ' h1 { color: blue; } ';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
assertJSONEquals(
{'line': 1, 'col': 0, 'tokenType': 'STYLESHEET', 'rules':
[{'line': 1, 'col': 1, 'tokenType': 'QUALIFIED_RULE', 'prelude':
[{'line': 1, 'col': 1, 'tokenType': 'IDENT', 'value': 'h1'},
{'line': 1, 'col': 3, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 4, 'tokenType': 'EOF_TOKEN'}], 'declarations':
[{'line': 1, 'col': 6, 'tokenType': 'DECLARATION', 'name':
'color', 'value':
[{'line': 1, 'col': 12, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 13, 'tokenType': 'IDENT', 'value':
'blue'},
{'line': 1, 'col': 17, 'tokenType': 'EOF_TOKEN'}], 'important':
false}]}], 'eof':
{'line': 1, 'col': 21, 'tokenType': 'EOF_TOKEN'}},
sheet);
assertStrictEqual(0, errors.length);
});
// The tests below are exploratory - they tell us what the css parser
// currently produces for these selectors. For a list of selectors, see
// http://www.w3.org/TR/css3-selectors/#selectors.
// Note also that css-selectors.js contains a parser for selectors
// which is covered in this unittest below.
it('handles simple selector example', () => {
assertJSONEquals(
[{'line': 1, 'col': 0, 'tokenType': 'DELIM', 'value': '*'},
{'line': 1, 'col': 1, 'tokenType': 'EOF_TOKEN'}],
parseSelectorForTest('*'));
});
it('handles another selector example', () => {
assertJSONEquals(
[{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'E'},
{'line': 1, 'col': 1, 'tokenType': 'EOF_TOKEN'}],
parseSelectorForTest('E'));
});
it('handles selector example with square braces', () => {
assertJSONEquals(
[
{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'E'},
{'line': 1, 'col': 1, 'tokenType': 'OPEN_SQUARE'},
{'line': 1, 'col': 2, 'tokenType': 'IDENT', 'value': 'foo'},
{'line': 1, 'col': 5, 'tokenType': 'CLOSE_SQUARE'},
{'line': 1, 'col': 6, 'tokenType': 'EOF_TOKEN'}
],
parseSelectorForTest('E[foo]'));
});
it('handles selector example with string matching', () => {
assertJSONEquals(
[
{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'E'},
{'line': 1, 'col': 1, 'tokenType': 'OPEN_SQUARE'},
{'line': 1, 'col': 2, 'tokenType': 'IDENT', 'value': 'foo'},
{'line': 1, 'col': 5, 'tokenType': 'DELIM', 'value': '='},
{'line': 1, 'col': 6, 'tokenType': 'STRING', 'value': 'bar'},
{'line': 1, 'col': 11, 'tokenType': 'CLOSE_SQUARE'},
{'line': 1, 'col': 12, 'tokenType': 'EOF_TOKEN'}
],
parseSelectorForTest('E[foo="bar"]'));
});
});
describe('extractUrls', () => {
// Tests that font urls are parsed with font-face atRuleScope.
it('finds font in font-face', () => {
const css =
"@font-face {font-family: 'Foo'; src: url('http://foo.com/bar.ttf');}";
const errors = [];
const tokenList = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenList, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
const parsedUrls = [];
parse_css.extractUrls(sheet, parsedUrls, errors);
assertJSONEquals([], errors);
assertJSONEquals(
[{'line': 1, 'col': 37, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'font-face', 'utf8Url': 'http://foo.com/bar.ttf'}], parsedUrls);
});
// Tests that image URLs are parsed with empty atRuleScope; also tests
// that unicode escapes (in this case \000026) within the URL are decoded.
it('supports image url with unicode', () => {
const css =
"body{background-image: url('http://a.com/b/c=d\\000026e=f_g*h');}";
const errors = [];
const tokenList = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenList, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
const parsedUrls = [];
parse_css.extractUrls(sheet, parsedUrls, errors);
assertJSONEquals([], errors);
assertJSONEquals(
[{'line': 1, 'col': 23, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'', 'utf8Url': 'http://a.com/b/c=d&e=f_g*h'}], parsedUrls);
});
// This example contains both image urls, other urls (fonts) and
// segments in between.
it('handles longer example', () => {
const css =
".a { color:red; background-image:url(4.png) }" +
".b { color:black; background-image:url('http://a.com/b.png') } " +
"@font-face {font-family: 'Medium';src: url('http://a.com/1.woff') " +
"format('woff'),url('http://b.com/1.ttf') format('truetype')," +
"src:url('') format('embedded-opentype');}";
const errors = [];
const tokenList = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenList, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
const parsedUrls = [];
parse_css.extractUrls(sheet, parsedUrls, errors);
assertJSONEquals([], errors);
assertJSONEquals(
[{'line': 1, 'col': 33, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'', 'utf8Url': '4.png'},
{'line': 1, 'col': 80, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'', 'utf8Url': 'http://a.com/b.png'},
{'line': 1, 'col': 147, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'font-face', 'utf8Url': 'http://a.com/1.woff'},
{'line': 1, 'col': 189, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'font-face', 'utf8Url': 'http://b.com/1.ttf'},
{'line': 1, 'col': 238, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'font-face', 'utf8Url': ''}], parsedUrls);
});
// Windows newlines present extra challenges for position information.
it('handles windows newlines', () => {
const css =
".a \r\n{ color:red; background-image:url(4.png) }\r\n" +
".b { color:black; \r\nbackground-image:url('http://a.com/b.png') }";
const errors = [];
const tokenList = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenList, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
const parsedUrls = [];
parse_css.extractUrls(sheet, parsedUrls, errors);
assertJSONEquals([], errors);
assertJSONEquals(
[{'line': 2, 'col': 30, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'', 'utf8Url': '4.png'},
{'line': 4, 'col': 17, 'tokenType': 'PARSED_CSS_URL', 'atRuleScope':
'', 'utf8Url': 'http://a.com/b.png'}], parsedUrls);
});
// This example parses as CSS without errors, however once the URL
// with parameters is extracted, we recognize that the arguments to
// the url function are invalid.
it('invalid arguments inside url function yields error', () => {
const css =
"\n" +
" @font-face {\n" +
" font-family: 'Roboto', sans-serif;\n" +
" src: url('<link href='https://fonts.googleapis.com/css" +
"?family=Roboto:300,400,500,700' " +
"rel='stylesheet' type='text/css'>');\n" +
" }\n";
const errors = [];
const tokenList = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenList, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
const parsedUrls = [];
parse_css.extractUrls(sheet, parsedUrls, errors);
assertJSONEquals(
[{'line': 4, 'col': 11, 'tokenType': 'ERROR',
'code': 'CSS_SYNTAX_BAD_URL', 'params': ['style']}], errors);
assertJSONEquals([], parsedUrls);
});
});
function parseSelectorForTest(selector) {
const css = selector + '{}';
const errors = [];
const tokenlist = parse_css.tokenize(css, 1, 0, errors);
const sheet = parse_css.parseAStylesheet(
tokenlist, ampAtRuleParsingSpec, parse_css.BlockType.PARSE_AS_IGNORE,
errors);
return goog.asserts.assertInstanceof(sheet.rules[0],
parse_css.QualifiedRule).prelude;
}
//
// Below this line: unittests for css-selectors.js.
//
describe('css_selectors', () => {
it('parses a type selector', () => {
const tokens = parseSelectorForTest('*');
assertJSONEquals(
[{'line': 1, 'col': 0, 'tokenType': 'DELIM', 'value': '*'},
{'line': 1, 'col': 1, 'tokenType': 'EOF_TOKEN'}], tokens);
let tokenStream = new parse_css.TokenStream(tokens);
tokenStream.consume();
let typeSelector = css_selectors.parseATypeSelector(tokenStream);
assertStrictEqual('*', typeSelector.toString());
tokenStream = new parse_css.TokenStream(parseSelectorForTest('*|*'));
tokenStream.consume();
typeSelector = css_selectors.parseATypeSelector(tokenStream);
assertStrictEqual('*|*', typeSelector.toString());
tokenStream = new parse_css.TokenStream(parseSelectorForTest('*|E'));
tokenStream.consume();
typeSelector = css_selectors.parseATypeSelector(tokenStream);
assertStrictEqual('*|E', typeSelector.toString());
tokenStream = new parse_css.TokenStream(parseSelectorForTest('svg|E'));
tokenStream.consume();
typeSelector = css_selectors.parseATypeSelector(tokenStream);
assertStrictEqual('svg|E', typeSelector.toString());
tokenStream = new parse_css.TokenStream(parseSelectorForTest('svg|*'));
tokenStream.consume();
typeSelector = css_selectors.parseATypeSelector(tokenStream);
assertStrictEqual('svg|*', typeSelector.toString());
tokenStream = new parse_css.TokenStream(parseSelectorForTest('|E'));
tokenStream.consume();
typeSelector = css_selectors.parseATypeSelector(tokenStream);
assertStrictEqual('|E', typeSelector.toString());
});
it('parses an id selector', () => {
const tokens = parseSelectorForTest('#hello-world');
assertJSONEquals(
[{'line': 1, 'col': 0, 'tokenType': 'HASH', 'type': 'id',
'value': 'hello-world'},
{'line': 1, 'col': 12, 'tokenType': 'EOF_TOKEN'}], tokens);
const tokenStream = new parse_css.TokenStream(tokens);
tokenStream.consume();
const idSelector = css_selectors.parseAnIdSelector(tokenStream);
assertStrictEqual('#hello-world', idSelector.toString());
assertStrictEqual(1, idSelector.line);
assertStrictEqual(0, idSelector.col);
});
it('parses a class selectro', () => {
const tokens = parseSelectorForTest('.hello-world');
assertJSONEquals(
[{'line': 1, 'col': 0, 'tokenType': 'DELIM', 'value': '.'},
{'line': 1, 'col': 1, 'tokenType': 'IDENT', 'value': 'hello-world'},
{'line': 1, 'col': 12, 'tokenType': 'EOF_TOKEN'}],
tokens);
const tokenStream = new parse_css.TokenStream(tokens);
tokenStream.consume();
const classSelector = css_selectors.parseAClassSelector(tokenStream);
assertStrictEqual('.hello-world', classSelector.toString());
assertStrictEqual(1, classSelector.line);
assertStrictEqual(0, classSelector.col);
});
it('parses a simple selector sequence', () => {
let tokens = parseSelectorForTest('a|b#c');
assertJSONEquals(
[{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'a'},
{'line': 1, 'col': 1, 'tokenType': 'DELIM', 'value': '|'},
{'line': 1, 'col': 2, 'tokenType': 'IDENT', 'value': 'b'},
{'line': 1, 'col': 3, 'tokenType': 'HASH', 'type': 'id',
'value': 'c'},
{'line': 1, 'col': 5, 'tokenType': 'EOF_TOKEN'}], tokens);
let tokenStream = new parse_css.TokenStream(tokens);
tokenStream.consume();
let sequence = css_selectors.parseASimpleSelectorSequence(tokenStream);
assertJSONEquals(
{'line': 1, 'col': 0, 'node': 'SIMPLE_SELECTOR_SEQUENCE',
'otherSelectors':
[{'line': 1, 'col': 3, 'value': 'c', 'node': 'ID_SELECTOR'}],
'typeSelector':
{'line': 1, 'col': 0, 'elementName': 'b', 'namespacePrefix':
'a', 'node': 'TYPE_SELECTOR'}},
sequence);
tokens = parseSelectorForTest('a|foo#bar.baz');
tokenStream = new parse_css.TokenStream(tokens);
tokenStream.consume();
sequence = css_selectors.parseASimpleSelectorSequence(tokenStream);
assertJSONEquals(
{'line': 1, 'col': 0, 'node': 'SIMPLE_SELECTOR_SEQUENCE',
'otherSelectors':
[{'line': 1, 'col': 5, 'value': 'bar', 'node': 'ID_SELECTOR'},
{'line': 1, 'col': 9, 'value': 'baz', 'node': 'CLASS_SELECTOR'}],
'typeSelector':
{'line': 1, 'col': 0, 'elementName': 'foo', 'namespacePrefix':
'a', 'node': 'TYPE_SELECTOR'}},
sequence);
});
it('parses a selector', () => {
const tokens = parseSelectorForTest('foo bar \n baz');
assertJSONEquals(
[{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'foo'},
{'line': 1, 'col': 3, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 4, 'tokenType': 'IDENT', 'value': 'bar'},
{'line': 1, 'col': 7, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 1, 'tokenType': 'IDENT', 'value': 'baz'},
{'line': 2, 'col': 4, 'tokenType': 'EOF_TOKEN'}],
tokens);
const tokenStream = new parse_css.TokenStream(tokens);
tokenStream.consume();
const selector = css_selectors.parseASelector(tokenStream);
assertJSONEquals(
{'line': 1, 'col': 7, 'combinatorType': 'DESCENDANT', 'left':
{'line': 1, 'col': 3, 'combinatorType': 'DESCENDANT', 'left':
{'line': 1, 'col': 0, 'node': 'SIMPLE_SELECTOR_SEQUENCE',
'otherSelectors':
[], 'typeSelector':
{'line': 1, 'col': 0, 'elementName': 'foo', 'namespacePrefix':
null, 'node': 'TYPE_SELECTOR'}}, 'node': 'COMBINATOR',
'right':
{'line': 1, 'col': 4, 'node': 'SIMPLE_SELECTOR_SEQUENCE',
'otherSelectors':
[], 'typeSelector':
{'line': 1, 'col': 4, 'elementName': 'bar', 'namespacePrefix':
null, 'node': 'TYPE_SELECTOR'}}}, 'node': 'COMBINATOR',
'right':
{'line': 2, 'col': 1, 'node': 'SIMPLE_SELECTOR_SEQUENCE',
'otherSelectors':
[], 'typeSelector':
{'line': 2, 'col': 1, 'elementName': 'baz', 'namespacePrefix':
null, 'node': 'TYPE_SELECTOR'}}},
selector);
});
it('parses a selectors group', () => {
const tokens = parseSelectorForTest('foo, bar \n, baz');
assertJSONEquals(
[
{'line': 1, 'col': 0, 'tokenType': 'IDENT', 'value': 'foo'},
{'line': 1, 'col': 3, 'tokenType': 'COMMA'},
{'line': 1, 'col': 4, 'tokenType': 'WHITESPACE'},
{'line': 1, 'col': 5, 'tokenType': 'IDENT', 'value': 'bar'},
{'line': 1, 'col': 8, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 0, 'tokenType': 'COMMA'},
{'line': 2, 'col': 1, 'tokenType': 'WHITESPACE'},
{'line': 2, 'col': 2, 'tokenType': 'IDENT', 'value': 'baz'},
{'line': 2, 'col': 5, 'tokenType': 'EOF_TOKEN'}
],
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