angular-docs-cn/modules/angular2/test/change_detection/parser/lexer_spec.ts

251 lines
8.9 KiB
TypeScript

import {ddescribe, describe, it, expect} from 'angular2/test_lib';
import {Lexer, Token} from 'angular2/src/change_detection/parser/lexer';
import {List, ListWrapper} from "angular2/src/facade/collection";
import {StringWrapper} from "angular2/src/facade/lang";
function lex(text: string): List<any> {
return new Lexer().tokenize(text);
}
function expectToken(token, index) {
expect(token instanceof Token).toBe(true);
expect(token.index).toEqual(index);
}
function expectCharacterToken(token, index, character) {
expect(character.length).toBe(1);
expectToken(token, index);
expect(token.isCharacter(StringWrapper.charCodeAt(character, 0))).toBe(true);
}
function expectOperatorToken(token, index, operator) {
expectToken(token, index);
expect(token.isOperator(operator)).toBe(true);
}
function expectNumberToken(token, index, n) {
expectToken(token, index);
expect(token.isNumber()).toBe(true);
expect(token.toNumber()).toEqual(n);
}
function expectStringToken(token, index, str) {
expectToken(token, index);
expect(token.isString()).toBe(true);
expect(token.toString()).toEqual(str);
}
function expectIdentifierToken(token, index, identifier) {
expectToken(token, index);
expect(token.isIdentifier()).toBe(true);
expect(token.toString()).toEqual(identifier);
}
function expectKeywordToken(token, index, keyword) {
expectToken(token, index);
expect(token.isKeyword()).toBe(true);
expect(token.toString()).toEqual(keyword);
}
export function main() {
describe('lexer', function() {
describe('token', function() {
it('should tokenize a simple identifier', function() {
var tokens: List<int> = lex("j");
expect(tokens.length).toEqual(1);
expectIdentifierToken(tokens[0], 0, 'j');
});
it('should tokenize a dotted identifier', function() {
var tokens: List<int> = lex("j.k");
expect(tokens.length).toEqual(3);
expectIdentifierToken(tokens[0], 0, 'j');
expectCharacterToken(tokens[1], 1, '.');
expectIdentifierToken(tokens[2], 2, 'k');
});
it('should tokenize an operator', function() {
var tokens: List<int> = lex("j-k");
expect(tokens.length).toEqual(3);
expectOperatorToken(tokens[1], 1, '-');
});
it('should tokenize an indexed operator', function() {
var tokens: List<int> = lex("j[k]");
expect(tokens.length).toEqual(4);
expectCharacterToken(tokens[1], 1, "[");
expectCharacterToken(tokens[3], 3, "]");
});
it('should tokenize numbers', function() {
var tokens: List<int> = lex("88");
expect(tokens.length).toEqual(1);
expectNumberToken(tokens[0], 0, 88);
});
it('should tokenize numbers within index ops',
function() { expectNumberToken(lex("a[22]")[2], 2, 22); });
it('should tokenize simple quoted strings',
function() { expectStringToken(lex('"a"')[0], 0, "a"); });
it('should tokenize quoted strings with escaped quotes',
function() { expectStringToken(lex('"a\\""')[0], 0, 'a"'); });
it('should tokenize a string', function() {
var tokens: List<Token> = lex("j-a.bc[22]+1.3|f:'a\\\'c':\"d\\\"e\"");
expectIdentifierToken(tokens[0], 0, 'j');
expectOperatorToken(tokens[1], 1, '-');
expectIdentifierToken(tokens[2], 2, 'a');
expectCharacterToken(tokens[3], 3, '.');
expectIdentifierToken(tokens[4], 4, 'bc');
expectCharacterToken(tokens[5], 6, '[');
expectNumberToken(tokens[6], 7, 22);
expectCharacterToken(tokens[7], 9, ']');
expectOperatorToken(tokens[8], 10, '+');
expectNumberToken(tokens[9], 11, 1.3);
expectOperatorToken(tokens[10], 14, '|');
expectIdentifierToken(tokens[11], 15, 'f');
expectCharacterToken(tokens[12], 16, ':');
expectStringToken(tokens[13], 17, "a'c");
expectCharacterToken(tokens[14], 23, ':');
expectStringToken(tokens[15], 24, 'd"e');
});
it('should tokenize undefined', function() {
var tokens: List<Token> = lex("undefined");
expectKeywordToken(tokens[0], 0, "undefined");
expect(tokens[0].isKeywordUndefined()).toBe(true);
});
it('should ignore whitespace', function() {
var tokens: List<Token> = lex("a \t \n \r b");
expectIdentifierToken(tokens[0], 0, 'a');
expectIdentifierToken(tokens[1], 8, 'b');
});
it('should tokenize quoted string', () => {
var str = "['\\'', \"\\\"\"]";
var tokens: List<Token> = lex(str);
expectStringToken(tokens[1], 1, "'");
expectStringToken(tokens[3], 7, '"');
});
it('should tokenize escaped quoted string', () => {
var str = '"\\"\\n\\f\\r\\t\\v\\u00A0"';
var tokens: List<Token> = lex(str);
expect(tokens.length).toEqual(1);
expect(tokens[0].toString()).toEqual('"\n\f\r\t\v\u00A0');
});
it('should tokenize unicode', function() {
var tokens: List<Token> = lex('"\\u00A0"');
expect(tokens.length).toEqual(1);
expect(tokens[0].toString()).toEqual('\u00a0');
});
it('should tokenize relation', function() {
var tokens: List<Token> = lex("! == != < > <= >= === !==");
expectOperatorToken(tokens[0], 0, '!');
expectOperatorToken(tokens[1], 2, '==');
expectOperatorToken(tokens[2], 5, '!=');
expectOperatorToken(tokens[3], 8, '<');
expectOperatorToken(tokens[4], 10, '>');
expectOperatorToken(tokens[5], 12, '<=');
expectOperatorToken(tokens[6], 15, '>=');
expectOperatorToken(tokens[7], 18, '===');
expectOperatorToken(tokens[8], 22, '!==');
});
it('should tokenize statements', function() {
var tokens: List<Token> = lex("a;b;");
expectIdentifierToken(tokens[0], 0, 'a');
expectCharacterToken(tokens[1], 1, ';');
expectIdentifierToken(tokens[2], 2, 'b');
expectCharacterToken(tokens[3], 3, ';');
});
it('should tokenize function invocation', function() {
var tokens: List<Token> = lex("a()");
expectIdentifierToken(tokens[0], 0, 'a');
expectCharacterToken(tokens[1], 1, '(');
expectCharacterToken(tokens[2], 2, ')');
});
it('should tokenize simple method invocations', function() {
var tokens: List<Token> = lex("a.method()");
expectIdentifierToken(tokens[2], 2, 'method');
});
it('should tokenize method invocation', function() {
var tokens: List<Token> = lex("a.b.c (d) - e.f()");
expectIdentifierToken(tokens[0], 0, 'a');
expectCharacterToken(tokens[1], 1, '.');
expectIdentifierToken(tokens[2], 2, 'b');
expectCharacterToken(tokens[3], 3, '.');
expectIdentifierToken(tokens[4], 4, 'c');
expectCharacterToken(tokens[5], 6, '(');
expectIdentifierToken(tokens[6], 7, 'd');
expectCharacterToken(tokens[7], 8, ')');
expectOperatorToken(tokens[8], 10, '-');
expectIdentifierToken(tokens[9], 12, 'e');
expectCharacterToken(tokens[10], 13, '.');
expectIdentifierToken(tokens[11], 14, 'f');
expectCharacterToken(tokens[12], 15, '(');
expectCharacterToken(tokens[13], 16, ')');
});
it('should tokenize number', function() {
var tokens: List<Token> = lex("0.5");
expectNumberToken(tokens[0], 0, 0.5);
});
// NOTE(deboer): NOT A LEXER TEST
// it('should tokenize negative number', () => {
// var tokens:List<Token> = lex("-0.5");
// expectNumberToken(tokens[0], 0, -0.5);
// });
it('should tokenize number with exponent', function() {
var tokens: List<Token> = lex("0.5E-10");
expect(tokens.length).toEqual(1);
expectNumberToken(tokens[0], 0, 0.5E-10);
tokens = lex("0.5E+10");
expectNumberToken(tokens[0], 0, 0.5E+10);
});
it('should throws exception for invalid exponent', function() {
expect(function() { lex("0.5E-"); })
.toThrowError('Lexer Error: Invalid exponent at column 4 in expression [0.5E-]');
expect(function() { lex("0.5E-A"); })
.toThrowError('Lexer Error: Invalid exponent at column 4 in expression [0.5E-A]');
});
it('should tokenize number starting with a dot', function() {
var tokens: List<Token> = lex(".5");
expectNumberToken(tokens[0], 0, 0.5);
});
it('should throw error on invalid unicode', function() {
expect(function() { lex("'\\u1''bla'"); })
.toThrowError(
"Lexer Error: Invalid unicode escape [\\u1''b] at column 2 in expression ['\\u1''bla']");
});
it('should tokenize hash as operator', function() {
var tokens: List<Token> = lex("#");
expectOperatorToken(tokens[0], 0, '#');
});
it('should tokenize ?. as operator', () => {
var tokens: List<Token> = lex('?.');
expectOperatorToken(tokens[0], 0, '?.');
});
});
});
}