angular-cn/modules/@angular/compiler/test/html_parser_spec.ts

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import {
ddescribe,
describe,
it,
iit,
xit,
expect,
beforeEach,
afterEach
} from '@angular/core/testing/testing_internal';
import {HtmlTokenType} from '@angular/compiler/src/html_lexer';
import {HtmlParser, HtmlParseTreeResult, HtmlTreeError} from '@angular/compiler/src/html_parser';
import {
HtmlAst,
HtmlAstVisitor,
HtmlElementAst,
HtmlAttrAst,
HtmlTextAst,
HtmlCommentAst,
htmlVisitAll,
HtmlExpansionAst,
HtmlExpansionCaseAst
} from '@angular/compiler/src/html_ast';
import {ParseError, ParseLocation} from '@angular/compiler/src/parse_util';
import {humanizeDom, humanizeDomSourceSpans, humanizeLineColumn} from './html_ast_spec_utils';
export function main() {
describe('HtmlParser', () => {
var parser: HtmlParser;
beforeEach(() => { parser = new HtmlParser(); });
describe('parse', () => {
describe('text nodes', () => {
it('should parse root level text nodes', () => {
expect(humanizeDom(parser.parse('a', 'TestComp'))).toEqual([[HtmlTextAst, 'a', 0]]);
});
it('should parse text nodes inside regular elements', () => {
expect(humanizeDom(parser.parse('<div>a</div>', 'TestComp')))
.toEqual([[HtmlElementAst, 'div', 0], [HtmlTextAst, 'a', 1]]);
});
it('should parse text nodes inside template elements', () => {
expect(humanizeDom(parser.parse('<template>a</template>', 'TestComp')))
.toEqual([[HtmlElementAst, 'template', 0], [HtmlTextAst, 'a', 1]]);
});
it('should parse CDATA', () => {
expect(humanizeDom(parser.parse('<![CDATA[text]]>', 'TestComp')))
.toEqual([[HtmlTextAst, 'text', 0]]);
});
});
describe('elements', () => {
it('should parse root level elements', () => {
expect(humanizeDom(parser.parse('<div></div>', 'TestComp')))
.toEqual([[HtmlElementAst, 'div', 0]]);
});
it('should parse elements inside of regular elements', () => {
expect(humanizeDom(parser.parse('<div><span></span></div>', 'TestComp')))
.toEqual([[HtmlElementAst, 'div', 0], [HtmlElementAst, 'span', 1]]);
});
it('should parse elements inside of template elements', () => {
expect(humanizeDom(parser.parse('<template><span></span></template>', 'TestComp')))
.toEqual([[HtmlElementAst, 'template', 0], [HtmlElementAst, 'span', 1]]);
});
it('should support void elements', () => {
expect(humanizeDom(parser.parse('<link rel="author license" href="/about">', 'TestComp')))
.toEqual([
[HtmlElementAst, 'link', 0],
[HtmlAttrAst, 'rel', 'author license'],
[HtmlAttrAst, 'href', '/about'],
]);
});
it('should not error on void elements from HTML5 spec',
() => { // http://www.w3.org/TR/html-markup/syntax.html#syntax-elements without:
// <base> - it can be present in head only
// <meta> - it can be present in head only
// <command> - obsolete
// <keygen> - obsolete
['<map><area></map>', '<div><br></div>', '<colgroup><col></colgroup>',
'<div><embed></div>', '<div><hr></div>', '<div><img></div>', '<div><input></div>',
'<object><param>/<object>', '<audio><source></audio>', '<audio><track></audio>',
'<p><wbr></p>',
].forEach((html) => { expect(parser.parse(html, 'TestComp').errors).toEqual([]); });
});
it('should close void elements on text nodes', () => {
expect(humanizeDom(parser.parse('<p>before<br>after</p>', 'TestComp')))
.toEqual([
[HtmlElementAst, 'p', 0],
[HtmlTextAst, 'before', 1],
[HtmlElementAst, 'br', 1],
[HtmlTextAst, 'after', 1],
]);
});
it('should support optional end tags', () => {
expect(humanizeDom(parser.parse('<div><p>1<p>2</div>', 'TestComp')))
.toEqual([
[HtmlElementAst, 'div', 0],
[HtmlElementAst, 'p', 1],
[HtmlTextAst, '1', 2],
[HtmlElementAst, 'p', 1],
[HtmlTextAst, '2', 2],
]);
});
it('should support nested elements', () => {
expect(humanizeDom(parser.parse('<ul><li><ul><li></li></ul></li></ul>', 'TestComp')))
.toEqual([
[HtmlElementAst, 'ul', 0],
[HtmlElementAst, 'li', 1],
[HtmlElementAst, 'ul', 2],
[HtmlElementAst, 'li', 3],
]);
});
it('should add the requiredParent', () => {
expect(
humanizeDom(parser.parse(
'<table><thead><tr head></tr></thead><tr noparent></tr><tbody><tr body></tr></tbody><tfoot><tr foot></tr></tfoot></table>',
'TestComp')))
.toEqual([
[HtmlElementAst, 'table', 0],
[HtmlElementAst, 'thead', 1],
[HtmlElementAst, 'tr', 2],
[HtmlAttrAst, 'head', ''],
[HtmlElementAst, 'tbody', 1],
[HtmlElementAst, 'tr', 2],
[HtmlAttrAst, 'noparent', ''],
[HtmlElementAst, 'tbody', 1],
[HtmlElementAst, 'tr', 2],
[HtmlAttrAst, 'body', ''],
[HtmlElementAst, 'tfoot', 1],
[HtmlElementAst, 'tr', 2],
[HtmlAttrAst, 'foot', '']
]);
});
it('should not add the requiredParent when the parent is a template', () => {
expect(humanizeDom(parser.parse('<template><tr></tr></template>', 'TestComp')))
.toEqual([
[HtmlElementAst, 'template', 0],
[HtmlElementAst, 'tr', 1],
]);
});
it('should support explicit mamespace', () => {
expect(humanizeDom(parser.parse('<myns:div></myns:div>', 'TestComp')))
.toEqual([[HtmlElementAst, '@myns:div', 0]]);
});
it('should support implicit mamespace', () => {
expect(humanizeDom(parser.parse('<svg></svg>', 'TestComp')))
.toEqual([[HtmlElementAst, '@svg:svg', 0]]);
});
it('should propagate the namespace', () => {
expect(humanizeDom(parser.parse('<myns:div><p></p></myns:div>', 'TestComp')))
.toEqual([[HtmlElementAst, '@myns:div', 0], [HtmlElementAst, '@myns:p', 1]]);
});
it('should match closing tags case sensitive', () => {
let errors = parser.parse('<DiV><P></p></dIv>', 'TestComp').errors;
expect(errors.length).toEqual(2);
expect(humanizeErrors(errors))
.toEqual([
['p', 'Unexpected closing tag "p"', '0:8'],
['dIv', 'Unexpected closing tag "dIv"', '0:12'],
]);
});
it('should support self closing void elements', () => {
expect(humanizeDom(parser.parse('<input />', 'TestComp')))
.toEqual([[HtmlElementAst, 'input', 0]]);
});
it('should support self closing foreign elements', () => {
expect(humanizeDom(parser.parse('<math />', 'TestComp')))
.toEqual([[HtmlElementAst, '@math:math', 0]]);
});
it('should ignore LF immediately after textarea, pre and listing', () => {
expect(humanizeDom(parser.parse(
'<p>\n</p><textarea>\n</textarea><pre>\n\n</pre><listing>\n\n</listing>',
'TestComp')))
.toEqual([
[HtmlElementAst, 'p', 0],
[HtmlTextAst, '\n', 1],
[HtmlElementAst, 'textarea', 0],
[HtmlElementAst, 'pre', 0],
[HtmlTextAst, '\n', 1],
[HtmlElementAst, 'listing', 0],
[HtmlTextAst, '\n', 1],
]);
});
});
describe('attributes', () => {
it('should parse attributes on regular elements case sensitive', () => {
expect(humanizeDom(parser.parse('<div kEy="v" key2=v2></div>', 'TestComp')))
.toEqual([
[HtmlElementAst, 'div', 0],
[HtmlAttrAst, 'kEy', 'v'],
[HtmlAttrAst, 'key2', 'v2'],
]);
});
it('should parse attributes without values', () => {
expect(humanizeDom(parser.parse('<div k></div>', 'TestComp')))
.toEqual([[HtmlElementAst, 'div', 0], [HtmlAttrAst, 'k', '']]);
});
it('should parse attributes on svg elements case sensitive', () => {
expect(humanizeDom(parser.parse('<svg viewBox="0"></svg>', 'TestComp')))
.toEqual([[HtmlElementAst, '@svg:svg', 0], [HtmlAttrAst, 'viewBox', '0']]);
});
it('should parse attributes on template elements', () => {
expect(humanizeDom(parser.parse('<template k="v"></template>', 'TestComp')))
.toEqual([[HtmlElementAst, 'template', 0], [HtmlAttrAst, 'k', 'v']]);
});
it('should support namespace', () => {
expect(humanizeDom(parser.parse('<svg:use xlink:href="Port" />', 'TestComp')))
.toEqual([[HtmlElementAst, '@svg:use', 0], [HtmlAttrAst, '@xlink:href', 'Port']]);
});
});
describe('comments', () => {
it('should preserve comments', () => {
expect(humanizeDom(parser.parse('<!-- comment --><div></div>', 'TestComp')))
.toEqual([[HtmlCommentAst, 'comment', 0], [HtmlElementAst, 'div', 0]]);
});
});
describe("expansion forms", () => {
it("should parse out expansion forms", () => {
let parsed = parser.parse(`<div>before{messages.length, plural, =0 {You have <b>no</b> messages} =1 {One {{message}}}}after</div>`,
'TestComp', true);
expect(humanizeDom(parsed))
.toEqual([
[HtmlElementAst, 'div', 0],
[HtmlTextAst, 'before', 1],
[HtmlExpansionAst, 'messages.length', 'plural'],
[HtmlExpansionCaseAst, '0'],
[HtmlExpansionCaseAst, '1'],
[HtmlTextAst, 'after', 1]
]);
let cases = (<any>parsed.rootNodes[0]).children[1].cases;
expect(humanizeDom(new HtmlParseTreeResult(cases[0].expression, [])))
.toEqual([
[HtmlTextAst, 'You have ', 0],
[HtmlElementAst, 'b', 0],
[HtmlTextAst, 'no', 1],
[HtmlTextAst, ' messages', 0],
]);
expect(humanizeDom(new HtmlParseTreeResult(cases[1].expression, [])))
.toEqual([[HtmlTextAst, 'One {{message}}', 0]]);
});
it("should parse out nested expansion forms", () => {
let parsed = parser.parse(`{messages.length, plural, =0 { {p.gender, gender, =m {m}} }}`,
'TestComp', true);
expect(humanizeDom(parsed))
.toEqual([
[HtmlExpansionAst, 'messages.length', 'plural'],
[HtmlExpansionCaseAst, '0'],
]);
let firstCase = (<any>parsed.rootNodes[0]).cases[0];
expect(humanizeDom(new HtmlParseTreeResult(firstCase.expression, [])))
.toEqual([
[HtmlExpansionAst, 'p.gender', 'gender'],
[HtmlExpansionCaseAst, 'm'],
[HtmlTextAst, ' ', 0],
]);
});
it("should error when expansion form is not closed", () => {
let p = parser.parse(`{messages.length, plural, =0 {one}`, 'TestComp', true);
expect(humanizeErrors(p.errors))
.toEqual([[null, "Invalid expansion form. Missing '}'.", '0:34']]);
});
it("should error when expansion case is not closed", () => {
let p = parser.parse(`{messages.length, plural, =0 {one`, 'TestComp', true);
expect(humanizeErrors(p.errors))
.toEqual([[null, "Invalid expansion form. Missing '}'.", '0:29']]);
});
it("should error when invalid html in the case", () => {
let p = parser.parse(`{messages.length, plural, =0 {<b/>}`, 'TestComp', true);
expect(humanizeErrors(p.errors))
.toEqual([['b', 'Only void and foreign elements can be self closed "b"', '0:30']]);
});
});
describe('source spans', () => {
it('should store the location', () => {
expect(humanizeDomSourceSpans(parser.parse(
'<div [prop]="v1" (e)="do()" attr="v2" noValue>\na\n</div>', 'TestComp')))
.toEqual([
[HtmlElementAst, 'div', 0, '<div [prop]="v1" (e)="do()" attr="v2" noValue>'],
[HtmlAttrAst, '[prop]', 'v1', '[prop]="v1"'],
[HtmlAttrAst, '(e)', 'do()', '(e)="do()"'],
[HtmlAttrAst, 'attr', 'v2', 'attr="v2"'],
[HtmlAttrAst, 'noValue', '', 'noValue'],
[HtmlTextAst, '\na\n', 1, '\na\n'],
]);
});
it('should set the start and end source spans', () => {
let node = <HtmlElementAst>parser.parse('<div>a</div>', 'TestComp').rootNodes[0];
expect(node.startSourceSpan.start.offset).toEqual(0);
expect(node.startSourceSpan.end.offset).toEqual(5);
expect(node.endSourceSpan.start.offset).toEqual(6);
expect(node.endSourceSpan.end.offset).toEqual(12);
});
});
describe('errors', () => {
it('should report unexpected closing tags', () => {
let errors = parser.parse('<div></p></div>', 'TestComp').errors;
expect(errors.length).toEqual(1);
expect(humanizeErrors(errors)).toEqual([['p', 'Unexpected closing tag "p"', '0:5']]);
});
it('should report closing tag for void elements', () => {
let errors = parser.parse('<input></input>', 'TestComp').errors;
expect(errors.length).toEqual(1);
expect(humanizeErrors(errors))
.toEqual([['input', 'Void elements do not have end tags "input"', '0:7']]);
});
it('should report self closing html element', () => {
let errors = parser.parse('<p />', 'TestComp').errors;
expect(errors.length).toEqual(1);
expect(humanizeErrors(errors))
.toEqual([['p', 'Only void and foreign elements can be self closed "p"', '0:0']]);
});
it('should report self closing custom element', () => {
let errors = parser.parse('<my-cmp />', 'TestComp').errors;
expect(errors.length).toEqual(1);
expect(humanizeErrors(errors))
.toEqual([
['my-cmp', 'Only void and foreign elements can be self closed "my-cmp"', '0:0']
]);
});
it('should also report lexer errors', () => {
let errors = parser.parse('<!-err--><div></p></div>', 'TestComp').errors;
expect(errors.length).toEqual(2);
expect(humanizeErrors(errors))
.toEqual([
[HtmlTokenType.COMMENT_START, 'Unexpected character "e"', '0:3'],
['p', 'Unexpected closing tag "p"', '0:14']
]);
});
});
});
});
}
export function humanizeErrors(errors: ParseError[]): any[] {
return errors.map(error => {
if (error instanceof HtmlTreeError) {
// Parser errors
return [<any>error.elementName, error.msg, humanizeLineColumn(error.span.start)];
}
// Tokenizer errors
return [(<any>error).tokenType, error.msg, humanizeLineColumn(error.span.start)];
});
}