angular-cn/modules/@angular/compiler/test/css/lexer_spec.ts

394 lines
14 KiB
TypeScript

import {
ddescribe,
describe,
it,
iit,
xit,
expect,
beforeEach,
afterEach
} from '@angular/core/testing/testing_internal';
import {isPresent} from '../../src/facade/lang';
import {
CssToken,
CssScannerError,
CssLexer,
CssLexerMode,
CssTokenType
} from '@angular/compiler/src/css/lexer';
export function main() {
function tokenize(code, trackComments: boolean = false,
mode: CssLexerMode = CssLexerMode.ALL): CssToken[] {
var scanner = new CssLexer().scan(code, trackComments);
scanner.setMode(mode);
var tokens = [];
var output = scanner.scan();
while (output != null) {
var error = output.error;
if (isPresent(error)) {
throw new CssScannerError(error.token, error.rawMessage);
}
tokens.push(output.token);
output = scanner.scan();
}
return tokens;
}
describe('CssLexer', () => {
it('should lex newline characters as whitespace when whitespace mode is on', () => {
var newlines = ["\n", "\r\n", "\r", "\f"];
newlines.forEach((line) => {
var token = tokenize(line, false, CssLexerMode.ALL_TRACK_WS)[0];
expect(token.type).toEqual(CssTokenType.Whitespace);
});
});
it('should combined newline characters as one newline token when whitespace mode is on', () => {
var newlines = ["\n", "\r\n", "\r", "\f"].join("");
var tokens = tokenize(newlines, false, CssLexerMode.ALL_TRACK_WS);
expect(tokens.length).toEqual(1);
expect(tokens[0].type).toEqual(CssTokenType.Whitespace);
});
it('should not consider whitespace or newline values at all when whitespace mode is off',
() => {
var newlines = ["\n", "\r\n", "\r", "\f"].join("");
var tokens = tokenize(newlines);
expect(tokens.length).toEqual(0);
});
it('should lex simple selectors and their inner properties', () => {
var cssCode = "\n" + " .selector { my-prop: my-value; }\n";
var tokens = tokenize(cssCode);
expect(tokens[0].type).toEqual(CssTokenType.Character);
expect(tokens[0].strValue).toEqual('.');
expect(tokens[1].type).toEqual(CssTokenType.Identifier);
expect(tokens[1].strValue).toEqual('selector');
expect(tokens[2].type).toEqual(CssTokenType.Character);
expect(tokens[2].strValue).toEqual('{');
expect(tokens[3].type).toEqual(CssTokenType.Identifier);
expect(tokens[3].strValue).toEqual('my-prop');
expect(tokens[4].type).toEqual(CssTokenType.Character);
expect(tokens[4].strValue).toEqual(':');
expect(tokens[5].type).toEqual(CssTokenType.Identifier);
expect(tokens[5].strValue).toEqual('my-value');
expect(tokens[6].type).toEqual(CssTokenType.Character);
expect(tokens[6].strValue).toEqual(';');
expect(tokens[7].type).toEqual(CssTokenType.Character);
expect(tokens[7].strValue).toEqual('}');
});
it('should capture the column and line values for each token', () => {
var cssCode = "#id {\n" + " prop:value;\n" + "}";
var tokens = tokenize(cssCode);
// #
expect(tokens[0].type).toEqual(CssTokenType.Character);
expect(tokens[0].column).toEqual(0);
expect(tokens[0].line).toEqual(0);
// id
expect(tokens[1].type).toEqual(CssTokenType.Identifier);
expect(tokens[1].column).toEqual(1);
expect(tokens[1].line).toEqual(0);
// {
expect(tokens[2].type).toEqual(CssTokenType.Character);
expect(tokens[2].column).toEqual(4);
expect(tokens[2].line).toEqual(0);
// prop
expect(tokens[3].type).toEqual(CssTokenType.Identifier);
expect(tokens[3].column).toEqual(2);
expect(tokens[3].line).toEqual(1);
// :
expect(tokens[4].type).toEqual(CssTokenType.Character);
expect(tokens[4].column).toEqual(6);
expect(tokens[4].line).toEqual(1);
// value
expect(tokens[5].type).toEqual(CssTokenType.Identifier);
expect(tokens[5].column).toEqual(7);
expect(tokens[5].line).toEqual(1);
// ;
expect(tokens[6].type).toEqual(CssTokenType.Character);
expect(tokens[6].column).toEqual(12);
expect(tokens[6].line).toEqual(1);
// }
expect(tokens[7].type).toEqual(CssTokenType.Character);
expect(tokens[7].column).toEqual(0);
expect(tokens[7].line).toEqual(2);
});
it('should lex quoted strings and escape accordingly', () => {
var cssCode = "prop: 'some { value } \\' that is quoted'";
var tokens = tokenize(cssCode);
expect(tokens[0].type).toEqual(CssTokenType.Identifier);
expect(tokens[1].type).toEqual(CssTokenType.Character);
expect(tokens[2].type).toEqual(CssTokenType.String);
expect(tokens[2].strValue).toEqual("'some { value } \\' that is quoted'");
});
it('should treat attribute operators as regular characters', () => {
tokenize('^|~+*').forEach((token) => { expect(token.type).toEqual(CssTokenType.Character); });
});
it('should lex numbers properly and set them as numbers', () => {
var cssCode = "0 1 -2 3.0 -4.001";
var tokens = tokenize(cssCode);
expect(tokens[0].type).toEqual(CssTokenType.Number);
expect(tokens[0].strValue).toEqual("0");
expect(tokens[1].type).toEqual(CssTokenType.Number);
expect(tokens[1].strValue).toEqual("1");
expect(tokens[2].type).toEqual(CssTokenType.Number);
expect(tokens[2].strValue).toEqual("-2");
expect(tokens[3].type).toEqual(CssTokenType.Number);
expect(tokens[3].strValue).toEqual("3.0");
expect(tokens[4].type).toEqual(CssTokenType.Number);
expect(tokens[4].strValue).toEqual("-4.001");
});
it('should lex @keywords', () => {
var cssCode = "@import()@something";
var tokens = tokenize(cssCode);
expect(tokens[0].type).toEqual(CssTokenType.AtKeyword);
expect(tokens[0].strValue).toEqual('@import');
expect(tokens[1].type).toEqual(CssTokenType.Character);
expect(tokens[1].strValue).toEqual('(');
expect(tokens[2].type).toEqual(CssTokenType.Character);
expect(tokens[2].strValue).toEqual(')');
expect(tokens[3].type).toEqual(CssTokenType.AtKeyword);
expect(tokens[3].strValue).toEqual('@something');
});
it('should still lex a number even if it has a dimension suffix', () => {
var cssCode = "40% is 40 percent";
var tokens = tokenize(cssCode);
expect(tokens[0].type).toEqual(CssTokenType.Number);
expect(tokens[0].strValue).toEqual('40');
expect(tokens[1].type).toEqual(CssTokenType.Character);
expect(tokens[1].strValue).toEqual('%');
expect(tokens[2].type).toEqual(CssTokenType.Identifier);
expect(tokens[2].strValue).toEqual('is');
expect(tokens[3].type).toEqual(CssTokenType.Number);
expect(tokens[3].strValue).toEqual('40');
});
it('should allow escaped character and unicode character-strings in CSS selectors', () => {
var cssCode = "\\123456 .some\\thing \{\}";
var tokens = tokenize(cssCode);
expect(tokens[0].type).toEqual(CssTokenType.Identifier);
expect(tokens[0].strValue).toEqual('\\123456');
expect(tokens[1].type).toEqual(CssTokenType.Character);
expect(tokens[2].type).toEqual(CssTokenType.Identifier);
expect(tokens[2].strValue).toEqual('some\\thing');
});
it('should distinguish identifiers and numbers from special characters', () => {
var cssCode = "one*two=-4+three-4-equals_value$";
var tokens = tokenize(cssCode);
expect(tokens[0].type).toEqual(CssTokenType.Identifier);
expect(tokens[0].strValue).toEqual("one");
expect(tokens[1].type).toEqual(CssTokenType.Character);
expect(tokens[1].strValue).toEqual("*");
expect(tokens[2].type).toEqual(CssTokenType.Identifier);
expect(tokens[2].strValue).toEqual("two");
expect(tokens[3].type).toEqual(CssTokenType.Character);
expect(tokens[3].strValue).toEqual("=");
expect(tokens[4].type).toEqual(CssTokenType.Number);
expect(tokens[4].strValue).toEqual("-4");
expect(tokens[5].type).toEqual(CssTokenType.Character);
expect(tokens[5].strValue).toEqual("+");
expect(tokens[6].type).toEqual(CssTokenType.Identifier);
expect(tokens[6].strValue).toEqual("three-4-equals_value");
expect(tokens[7].type).toEqual(CssTokenType.Character);
expect(tokens[7].strValue).toEqual("$");
});
it('should filter out comments and whitespace by default', () => {
var cssCode = ".selector /* comment */ { /* value */ }";
var tokens = tokenize(cssCode);
expect(tokens[0].strValue).toEqual(".");
expect(tokens[1].strValue).toEqual("selector");
expect(tokens[2].strValue).toEqual("{");
expect(tokens[3].strValue).toEqual("}");
});
it('should track comments when the flag is set to true', () => {
var cssCode = ".selector /* comment */ { /* value */ }";
var trackComments = true;
var tokens = tokenize(cssCode, trackComments, CssLexerMode.ALL_TRACK_WS);
expect(tokens[0].strValue).toEqual(".");
expect(tokens[1].strValue).toEqual("selector");
expect(tokens[2].strValue).toEqual(" ");
expect(tokens[3].type).toEqual(CssTokenType.Comment);
expect(tokens[3].strValue).toEqual("/* comment */");
expect(tokens[4].strValue).toEqual(" ");
expect(tokens[5].strValue).toEqual("{");
expect(tokens[6].strValue).toEqual(" ");
expect(tokens[7].type).toEqual(CssTokenType.Comment);
expect(tokens[7].strValue).toEqual("/* value */");
});
describe('Selector Mode', () => {
it('should throw an error if a selector is being parsed while in the wrong mode', () => {
var cssCode = ".class > tag";
var capturedMessage;
try {
tokenize(cssCode, false, CssLexerMode.STYLE_BLOCK);
} catch (e) {
capturedMessage = e.rawMessage;
}
expect(capturedMessage)
.toMatchPattern(/Unexpected character \[\>\] at column 0:7 in expression/g);
capturedMessage = null;
try {
tokenize(cssCode, false, CssLexerMode.SELECTOR);
} catch (e) {
capturedMessage = e.rawMessage;
}
expect(capturedMessage).toEqual(null);
});
});
describe('Attribute Mode', () => {
it('should consider attribute selectors as valid input and throw when an invalid modifier is used',
() => {
function tokenizeAttr(modifier) {
var cssCode = "value" + modifier + "='something'";
return tokenize(cssCode, false, CssLexerMode.ATTRIBUTE_SELECTOR);
}
expect(tokenizeAttr("*").length).toEqual(4);
expect(tokenizeAttr("|").length).toEqual(4);
expect(tokenizeAttr("^").length).toEqual(4);
expect(tokenizeAttr("$").length).toEqual(4);
expect(tokenizeAttr("~").length).toEqual(4);
expect(tokenizeAttr("").length).toEqual(3);
expect(() => { tokenizeAttr("+"); }).toThrow();
});
});
describe('Media Query Mode', () => {
it('should validate media queries with a reduced subset of valid characters', () => {
function tokenizeQuery(code) { return tokenize(code, false, CssLexerMode.MEDIA_QUERY); }
// the reason why the numbers are so high is because MediaQueries keep
// track of the whitespace values
expect(tokenizeQuery("(prop: value)").length).toEqual(5);
expect(tokenizeQuery("(prop: value) and (prop2: value2)").length).toEqual(11);
expect(tokenizeQuery("tv and (prop: value)").length).toEqual(7);
expect(tokenizeQuery("print and ((prop: value) or (prop2: value2))").length).toEqual(15);
expect(tokenizeQuery("(content: 'something $ crazy inside &')").length).toEqual(5);
expect(() => { tokenizeQuery("(max-height: 10 + 20)"); }).toThrow();
expect(() => { tokenizeQuery("(max-height: fifty < 100)"); }).toThrow();
});
});
describe('Pseudo Selector Mode', () => {
it('should validate pseudo selector identifiers with a reduced subset of valid characters',
() => {
function tokenizePseudo(code) {
return tokenize(code, false, CssLexerMode.PSEUDO_SELECTOR);
}
expect(tokenizePseudo("lang(en-us)").length).toEqual(4);
expect(tokenizePseudo("hover").length).toEqual(1);
expect(tokenizePseudo("focus").length).toEqual(1);
expect(() => { tokenizePseudo("lang(something:broken)"); }).toThrow();
expect(() => { tokenizePseudo("not(.selector)"); }).toThrow();
});
});
describe('Pseudo Selector Mode', () => {
it('should validate pseudo selector identifiers with a reduced subset of valid characters',
() => {
function tokenizePseudo(code) {
return tokenize(code, false, CssLexerMode.PSEUDO_SELECTOR);
}
expect(tokenizePseudo("lang(en-us)").length).toEqual(4);
expect(tokenizePseudo("hover").length).toEqual(1);
expect(tokenizePseudo("focus").length).toEqual(1);
expect(() => { tokenizePseudo("lang(something:broken)"); }).toThrow();
expect(() => { tokenizePseudo("not(.selector)"); }).toThrow();
});
});
describe('Style Block Mode', () => {
it('should style blocks with a reduced subset of valid characters', () => {
function tokenizeStyles(code) { return tokenize(code, false, CssLexerMode.STYLE_BLOCK); }
expect(tokenizeStyles(`
key: value;
prop: 100;
style: value3!important;
`).length)
.toEqual(14);
expect(() => tokenizeStyles(` key$: value; `)).toThrow();
expect(() => tokenizeStyles(` key: value$; `)).toThrow();
expect(() => tokenizeStyles(` key: value + 10; `)).toThrow();
expect(() => tokenizeStyles(` key: &value; `)).toThrow();
});
});
});
}