angular-cn/packages/compiler/test/selector/selector_spec.ts

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/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {ɵgetDOM as getDOM} from '@angular/common';
import {CssSelector, SelectorMatcher} from '@angular/compiler/src/selector';
import {el} from '@angular/platform-browser/testing/src/browser_util';
{
describe('SelectorMatcher', () => {
let matcher: SelectorMatcher;
let selectableCollector: (selector: CssSelector, context: any) => void;
let s1: any[], s2: any[], s3: any[], s4: any[];
let matched: any[];
function reset() {
matched = [];
}
beforeEach(() => {
reset();
s1 = s2 = s3 = s4 = null!;
selectableCollector = (selector: CssSelector, context: any) => {
matched.push(selector, context);
};
matcher = new SelectorMatcher();
});
it('should select by element name case sensitive', () => {
matcher.addSelectables(s1 = CssSelector.parse('someTag'), 1);
expect(matcher.match(getSelectorFor({tag: 'SOMEOTHERTAG'}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(getSelectorFor({tag: 'SOMETAG'}), selectableCollector)).toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(getSelectorFor({tag: 'someTag'}), selectableCollector)).toEqual(true);
expect(matched).toEqual([s1[0], 1]);
});
it('should select by class name case insensitive', () => {
matcher.addSelectables(s1 = CssSelector.parse('.someClass'), 1);
matcher.addSelectables(s2 = CssSelector.parse('.someClass.class2'), 2);
expect(matcher.match(getSelectorFor({classes: 'SOMEOTHERCLASS'}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(getSelectorFor({classes: 'SOMECLASS'}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1]);
reset();
expect(matcher.match(getSelectorFor({classes: 'someClass class2'}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2]);
});
it('should not throw for class name "constructor"', () => {
expect(matcher.match(getSelectorFor({classes: 'constructor'}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
});
it('should select by attr name case sensitive independent of the value', () => {
matcher.addSelectables(s1 = CssSelector.parse('[someAttr]'), 1);
matcher.addSelectables(s2 = CssSelector.parse('[someAttr][someAttr2]'), 2);
expect(matcher.match(getSelectorFor({attrs: [['SOMEOTHERATTR', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(getSelectorFor({attrs: [['SOMEATTR', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(
matcher.match(getSelectorFor({attrs: [['SOMEATTR', 'someValue']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(
matcher.match(
getSelectorFor({attrs: [['someAttr', ''], ['someAttr2', '']]}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2]);
reset();
expect(matcher.match(
getSelectorFor({attrs: [['someAttr', 'someValue'], ['someAttr2', '']]}),
selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2]);
reset();
expect(matcher.match(
getSelectorFor({attrs: [['someAttr2', ''], ['someAttr', 'someValue']]}),
selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2]);
reset();
expect(matcher.match(
getSelectorFor({attrs: [['someAttr2', 'someValue'], ['someAttr', '']]}),
selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2]);
});
it('should support "." in attribute names', () => {
matcher.addSelectables(s1 = CssSelector.parse('[foo.bar]'), 1);
expect(matcher.match(getSelectorFor({attrs: [['barfoo', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
reset();
expect(matcher.match(getSelectorFor({attrs: [['foo.bar', '']]}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1]);
});
it('should support "$" in attribute names', () => {
matcher.addSelectables(s1 = CssSelector.parse('[someAttr\\$]'), 1);
expect(matcher.match(getSelectorFor({attrs: [['someAttr', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
reset();
expect(matcher.match(getSelectorFor({attrs: [['someAttr$', '']]}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1]);
reset();
matcher.addSelectables(s1 = CssSelector.parse('[some\\$attr]'), 1);
expect(matcher.match(getSelectorFor({attrs: [['someattr', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(getSelectorFor({attrs: [['some$attr', '']]}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1]);
reset();
matcher.addSelectables(s1 = CssSelector.parse('[\\$someAttr]'), 1);
expect(matcher.match(getSelectorFor({attrs: [['someAttr', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(getSelectorFor({attrs: [['$someAttr', '']]}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1]);
reset();
matcher.addSelectables(s1 = CssSelector.parse('[some-\\$Attr]'), 1);
matcher.addSelectables(s2 = CssSelector.parse('[some-\\$Attr][some-\\$-attr]'), 2);
expect(matcher.match(getSelectorFor({attrs: [['some\\$Attr', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(
getSelectorFor({attrs: [['some-$-attr', 'someValue'], ['some-$Attr', '']]}),
selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2]);
reset();
expect(matcher.match(getSelectorFor({attrs: [['someattr$', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(
getSelectorFor({attrs: [['some-simple-attr', '']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
reset();
});
it('should select by attr name only once if the value is from the DOM', () => {
matcher.addSelectables(s1 = CssSelector.parse('[some-decor]'), 1);
const elementSelector = new CssSelector();
const element = el('<div attr></div>');
const empty = element.getAttribute('attr')!;
elementSelector.addAttribute('some-decor', empty);
matcher.match(elementSelector, selectableCollector);
expect(matched).toEqual([s1[0], 1]);
});
it('should select by attr name case sensitive and value case insensitive', () => {
matcher.addSelectables(s1 = CssSelector.parse('[someAttr=someValue]'), 1);
expect(matcher.match(
getSelectorFor({attrs: [['SOMEATTR', 'SOMEOTHERATTR']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(
matcher.match(getSelectorFor({attrs: [['SOMEATTR', 'SOMEVALUE']]}), selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(
matcher.match(getSelectorFor({attrs: [['someAttr', 'SOMEVALUE']]}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1]);
});
it('should select by element name, class name and attribute name with value', () => {
matcher.addSelectables(s1 = CssSelector.parse('someTag.someClass[someAttr=someValue]'), 1);
expect(
matcher.match(
getSelectorFor(
{tag: 'someOtherTag', classes: 'someOtherClass', attrs: [['someOtherAttr', '']]}),
selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(
getSelectorFor(
{tag: 'someTag', classes: 'someOtherClass', attrs: [['someOtherAttr', '']]}),
selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(
getSelectorFor(
{tag: 'someTag', classes: 'someClass', attrs: [['someOtherAttr', '']]}),
selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(
getSelectorFor({tag: 'someTag', classes: 'someClass', attrs: [['someAttr', '']]}),
selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
expect(matcher.match(
getSelectorFor(
{tag: 'someTag', classes: 'someClass', attrs: [['someAttr', 'someValue']]}),
selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1]);
});
it('should select by many attributes and independent of the value', () => {
matcher.addSelectables(s1 = CssSelector.parse('input[type=text][control]'), 1);
const cssSelector = new CssSelector();
cssSelector.setElement('input');
cssSelector.addAttribute('type', 'text');
cssSelector.addAttribute('control', 'one');
expect(matcher.match(cssSelector, selectableCollector)).toEqual(true);
expect(matched).toEqual([s1[0], 1]);
});
it('should select independent of the order in the css selector', () => {
matcher.addSelectables(s1 = CssSelector.parse('[someAttr].someClass'), 1);
matcher.addSelectables(s2 = CssSelector.parse('.someClass[someAttr]'), 2);
matcher.addSelectables(s3 = CssSelector.parse('.class1.class2'), 3);
matcher.addSelectables(s4 = CssSelector.parse('.class2.class1'), 4);
expect(matcher.match(CssSelector.parse('[someAttr].someClass')[0], selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2]);
reset();
expect(matcher.match(CssSelector.parse('.someClass[someAttr]')[0], selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2]);
reset();
expect(matcher.match(CssSelector.parse('.class1.class2')[0], selectableCollector))
.toEqual(true);
expect(matched).toEqual([s3[0], 3, s4[0], 4]);
reset();
expect(matcher.match(CssSelector.parse('.class2.class1')[0], selectableCollector))
.toEqual(true);
expect(matched).toEqual([s4[0], 4, s3[0], 3]);
});
it('should not select with a matching :not selector', () => {
matcher.addSelectables(CssSelector.parse('p:not(.someClass)'), 1);
matcher.addSelectables(CssSelector.parse('p:not([someAttr])'), 2);
matcher.addSelectables(CssSelector.parse(':not(.someClass)'), 3);
matcher.addSelectables(CssSelector.parse(':not(p)'), 4);
matcher.addSelectables(CssSelector.parse(':not(p[someAttr])'), 5);
expect(matcher.match(
getSelectorFor({tag: 'p', classes: 'someClass', attrs: [['someAttr', '']]}),
selectableCollector))
.toEqual(false);
expect(matched).toEqual([]);
});
it('should select with a non matching :not selector', () => {
matcher.addSelectables(s1 = CssSelector.parse('p:not(.someClass)'), 1);
matcher.addSelectables(s2 = CssSelector.parse('p:not(.someOtherClass[someAttr])'), 2);
matcher.addSelectables(s3 = CssSelector.parse(':not(.someClass)'), 3);
matcher.addSelectables(s4 = CssSelector.parse(':not(.someOtherClass[someAttr])'), 4);
expect(
matcher.match(
getSelectorFor({tag: 'p', attrs: [['someOtherAttr', '']], classes: 'someOtherClass'}),
selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1, s2[0], 2, s3[0], 3, s4[0], 4]);
});
it('should match * with :not selector', () => {
matcher.addSelectables(CssSelector.parse(':not([a])'), 1);
expect(matcher.match(getSelectorFor({tag: 'div'}), () => {})).toEqual(true);
});
it('should match with multiple :not selectors', () => {
matcher.addSelectables(s1 = CssSelector.parse('div:not([a]):not([b])'), 1);
expect(matcher.match(getSelectorFor({tag: 'div', attrs: [['a', '']]}), selectableCollector))
.toBe(false);
expect(matcher.match(getSelectorFor({tag: 'div', attrs: [['b', '']]}), selectableCollector))
.toBe(false);
expect(matcher.match(getSelectorFor({tag: 'div', attrs: [['c', '']]}), selectableCollector))
.toBe(true);
});
it('should select with one match in a list', () => {
matcher.addSelectables(s1 = CssSelector.parse('input[type=text], textbox'), 1);
expect(matcher.match(getSelectorFor({tag: 'textbox'}), selectableCollector)).toEqual(true);
expect(matched).toEqual([s1[1], 1]);
reset();
expect(matcher.match(
getSelectorFor({tag: 'input', attrs: [['type', 'text']]}), selectableCollector))
.toEqual(true);
expect(matched).toEqual([s1[0], 1]);
});
it('should not select twice with two matches in a list', () => {
matcher.addSelectables(s1 = CssSelector.parse('input, .someClass'), 1);
expect(
matcher.match(getSelectorFor({tag: 'input', classes: 'someclass'}), selectableCollector))
.toEqual(true);
expect(matched.length).toEqual(2);
expect(matched).toEqual([s1[0], 1]);
});
});
describe('CssSelector.parse', () => {
it('should detect element names', () => {
const cssSelector = CssSelector.parse('sometag')[0];
expect(cssSelector.element).toEqual('sometag');
expect(cssSelector.toString()).toEqual('sometag');
});
it('should detect attr names with escaped $', () => {
let cssSelector = CssSelector.parse('[attrname\\$]')[0];
expect(cssSelector.attrs).toEqual(['attrname$', '']);
expect(cssSelector.toString()).toEqual('[attrname\\$]');
cssSelector = CssSelector.parse('[\\$attrname]')[0];
expect(cssSelector.attrs).toEqual(['$attrname', '']);
expect(cssSelector.toString()).toEqual('[\\$attrname]');
cssSelector = CssSelector.parse('[foo\\$bar]')[0];
expect(cssSelector.attrs).toEqual(['foo$bar', '']);
expect(cssSelector.toString()).toEqual('[foo\\$bar]');
});
it('should error on attr names with unescaped $', () => {
expect(() => CssSelector.parse('[attrname$]'))
.toThrowError(
'Error in attribute selector "attrname$". Unescaped "$" is not supported. Please escape with "\\$".');
expect(() => CssSelector.parse('[$attrname]'))
.toThrowError(
'Error in attribute selector "$attrname". Unescaped "$" is not supported. Please escape with "\\$".');
expect(() => CssSelector.parse('[foo$bar]'))
.toThrowError(
'Error in attribute selector "foo$bar". Unescaped "$" is not supported. Please escape with "\\$".');
expect(() => CssSelector.parse('[foo\\$bar$]'))
.toThrowError(
'Error in attribute selector "foo\\$bar$". Unescaped "$" is not supported. Please escape with "\\$".');
});
it('should detect class names', () => {
const cssSelector = CssSelector.parse('.someClass')[0];
expect(cssSelector.classNames).toEqual(['someclass']);
expect(cssSelector.toString()).toEqual('.someclass');
});
it('should detect attr names', () => {
const cssSelector = CssSelector.parse('[attrname]')[0];
expect(cssSelector.attrs).toEqual(['attrname', '']);
expect(cssSelector.toString()).toEqual('[attrname]');
});
it('should detect attr values', () => {
const cssSelector = CssSelector.parse('[attrname=attrvalue]')[0];
expect(cssSelector.attrs).toEqual(['attrname', 'attrvalue']);
expect(cssSelector.toString()).toEqual('[attrname=attrvalue]');
});
it('should detect attr values with double quotes', () => {
const cssSelector = CssSelector.parse('[attrname="attrvalue"]')[0];
expect(cssSelector.attrs).toEqual(['attrname', 'attrvalue']);
expect(cssSelector.toString()).toEqual('[attrname=attrvalue]');
});
it('should detect #some-value syntax and treat as attribute', () => {
const cssSelector = CssSelector.parse('#some-value')[0];
expect(cssSelector.attrs).toEqual(['id', 'some-value']);
expect(cssSelector.toString()).toEqual('[id=some-value]');
});
it('should detect attr values with single quotes', () => {
const cssSelector = CssSelector.parse('[attrname=\'attrvalue\']')[0];
expect(cssSelector.attrs).toEqual(['attrname', 'attrvalue']);
expect(cssSelector.toString()).toEqual('[attrname=attrvalue]');
});
it('should detect multiple parts', () => {
const cssSelector = CssSelector.parse('sometag[attrname=attrvalue].someclass')[0];
expect(cssSelector.element).toEqual('sometag');
expect(cssSelector.attrs).toEqual(['attrname', 'attrvalue']);
expect(cssSelector.classNames).toEqual(['someclass']);
expect(cssSelector.toString()).toEqual('sometag.someclass[attrname=attrvalue]');
});
it('should detect multiple attributes', () => {
const cssSelector = CssSelector.parse('input[type=text][control]')[0];
expect(cssSelector.element).toEqual('input');
expect(cssSelector.attrs).toEqual(['type', 'text', 'control', '']);
expect(cssSelector.toString()).toEqual('input[type=text][control]');
});
it('should detect :not', () => {
const cssSelector = CssSelector.parse('sometag:not([attrname=attrvalue].someclass)')[0];
expect(cssSelector.element).toEqual('sometag');
expect(cssSelector.attrs.length).toEqual(0);
expect(cssSelector.classNames.length).toEqual(0);
const notSelector = cssSelector.notSelectors[0];
expect(notSelector.element).toEqual(null);
expect(notSelector.attrs).toEqual(['attrname', 'attrvalue']);
expect(notSelector.classNames).toEqual(['someclass']);
expect(cssSelector.toString()).toEqual('sometag:not(.someclass[attrname=attrvalue])');
});
it('should detect :not without truthy', () => {
const cssSelector = CssSelector.parse(':not([attrname=attrvalue].someclass)')[0];
expect(cssSelector.element).toEqual('*');
const notSelector = cssSelector.notSelectors[0];
expect(notSelector.attrs).toEqual(['attrname', 'attrvalue']);
expect(notSelector.classNames).toEqual(['someclass']);
expect(cssSelector.toString()).toEqual('*:not(.someclass[attrname=attrvalue])');
});
it('should throw when nested :not', () => {
expect(() => {
CssSelector.parse('sometag:not(:not([attrname=attrvalue].someclass))')[0];
}).toThrowError('Nesting :not in a selector is not allowed');
});
it('should throw when multiple selectors in :not', () => {
expect(() => {
CssSelector.parse('sometag:not(a,b)');
}).toThrowError('Multiple selectors in :not are not supported');
});
it('should detect lists of selectors', () => {
const cssSelectors = CssSelector.parse('.someclass,[attrname=attrvalue], sometag');
expect(cssSelectors.length).toEqual(3);
expect(cssSelectors[0].classNames).toEqual(['someclass']);
expect(cssSelectors[1].attrs).toEqual(['attrname', 'attrvalue']);
expect(cssSelectors[2].element).toEqual('sometag');
});
it('should detect lists of selectors with :not', () => {
const cssSelectors =
CssSelector.parse('input[type=text], :not(textarea), textbox:not(.special)');
expect(cssSelectors.length).toEqual(3);
expect(cssSelectors[0].element).toEqual('input');
expect(cssSelectors[0].attrs).toEqual(['type', 'text']);
expect(cssSelectors[1].element).toEqual('*');
expect(cssSelectors[1].notSelectors[0].element).toEqual('textarea');
expect(cssSelectors[2].element).toEqual('textbox');
expect(cssSelectors[2].notSelectors[0].classNames).toEqual(['special']);
});
});
describe('CssSelector.getMatchingElementTemplate', () => {
it('should create an element with a tagName, classes, and attributes with the correct casing',
() => {
const selector = CssSelector.parse('Blink.neon.hotpink[Sweet][Dismissable=false]')[0];
const template = selector.getMatchingElementTemplate();
expect(template).toEqual('<Blink class="neon hotpink" Sweet Dismissable="false"></Blink>');
});
it('should create an element without a tag name', () => {
const selector = CssSelector.parse('[fancy]')[0];
const template = selector.getMatchingElementTemplate();
expect(template).toEqual('<div fancy></div>');
});
it('should ignore :not selectors', () => {
const selector = CssSelector.parse('grape:not(.red)')[0];
const template = selector.getMatchingElementTemplate();
expect(template).toEqual('<grape></grape>');
});
it('should support void tags', () => {
const selector = CssSelector.parse('input[fancy]')[0];
const template = selector.getMatchingElementTemplate();
expect(template).toEqual('<input fancy/>');
});
});
}
function getSelectorFor(
{tag = '', attrs = [], classes = ''}: {tag?: string, attrs?: any[], classes?: string} = {}):
CssSelector {
const selector = new CssSelector();
selector.setElement(tag);
attrs.forEach(nameValue => {
selector.addAttribute(nameValue[0], nameValue[1]);
});
classes.trim().split(/\s+/g).forEach(cName => {
selector.addClassName(cName);
});
return selector;
}