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test(scanner): port the rest of the lexer tests from AngularDart 

Closes #64
This commit is contained in:
Chirayu Krishnappa 2014-10-06 12:44:38 -07:00
parent 5162b3c0ca
commit e4ce69dcc7
4 changed files with 298 additions and 123 deletions
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29
modules/change_detection/src/parser/scanner.js
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@ -163,6 +163,15 @@ const $TILDE = 126;
const $NBSP = 160;
export class ScannerError extends Error {
constructor(message) {
this.message = message;
}
toString() {
return this.message;
}
}
export class Scanner {
@FIELD('final input:String')
@ -214,7 +223,7 @@ export class Scanner {
switch (peek) {
case $PERIOD:
this.advance();
return isDigit(peek) ? scanNumber(start) :
return isDigit(this.peek) ? this.scanNumber(start) :
newCharacterToken(start, $PERIOD);
case $LPAREN: case $RPAREN:
case $LBRACE: case $RBRACE:
@ -250,7 +259,7 @@ export class Scanner {
return this.scanToken();
}
this.error(`Unexpected character [${StringWrapper.fromCharCode(peek)}]`);
this.error(`Unexpected character [${StringWrapper.fromCharCode(peek)}]`, 0);
return null;
}
@ -305,7 +314,7 @@ export class Scanner {
} else if (isExponentStart(this.peek)) {
this.advance();
if (isExponentSign(this.peek)) this.advance();
if (!isDigit(this.peek)) this.error('Invalid exponent');
if (!isDigit(this.peek)) this.error('Invalid exponent', -1);
simple = false;
} else {
break;
@ -324,7 +333,7 @@ export class Scanner {
var quote:int = this.peek;
this.advance(); // Skip initial quote.
var buffer:StringJoiner; //ckck
var buffer:StringJoiner;
var marker:int = this.index;
var input:string = this.input;
@ -337,7 +346,11 @@ export class Scanner {
if (this.peek == $u) {
// 4 character hex code for unicode character.
var hex:string = input.substring(this.index + 1, this.index + 5);
try {
unescapedCode = NumberWrapper.parseInt(hex, 16);
} catch (e) {
this.error(`Invalid unicode escape [\\u${hex}]`, 0);
}
for (var i:int = 0; i < 5; i++) {
this.advance();
}
@ -348,7 +361,7 @@ export class Scanner {
buffer.add(StringWrapper.fromCharCode(unescapedCode));
marker = this.index;
} else if (this.peek == $EOF) {
this.error('Unterminated quote');
this.error('Unterminated quote', 0);
} else {
this.advance();
}
@ -367,9 +380,9 @@ export class Scanner {
return newStringToken(start, unescaped);
}
error(message:string) {
var position:int = this.index;
throw `Lexer Error: ${message} at column ${position} in expression [${input}]`;
error(message:string, offset:int) {
var position:int = this.index + offset;
throw new ScannerError(`Lexer Error: ${message} at column ${position} in expression [${this.input}]`);
}
}

108
modules/change_detection/test/parser/lexer_spec.js
View File

@ -1,108 +0,0 @@
import {describe, it, expect} from 'test_lib/test_lib';
import {Scanner, Token} from 'change_detection/parser/scanner';
import {List, ListWrapper} from "facade/collection";
import {StringWrapper} from "facade/lang";
function lex(text:string):List {
var scanner:Scanner = new Scanner(text);
var tokens:List<Token> = [];
var token:Token = scanner.scanToken();
while (token != null) {
ListWrapper.push(tokens, token);
token = scanner.scanToken();
}
return tokens;
}
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('scanner', 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"');
});
});
});
}

249
modules/change_detection/test/parser/scanner_spec.js Normal file
View File

@ -0,0 +1,249 @@
import {describe, it, expect} from 'test_lib/test_lib';
import {Scanner, Token} from 'change_detection/parser/scanner';
import {List, ListWrapper} from "facade/collection";
import {StringWrapper} from "facade/lang";
function lex(text:string):List {
var scanner:Scanner = new Scanner(text);
var tokens:List<Token> = [];
var token:Token = scanner.scanToken();
while (token != null) {
ListWrapper.push(tokens, token);
token = scanner.scanToken();
}
return tokens;
}
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('scanner', 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', function() {
var str = "['\\'', \"\\\"\"]";
var tokens:List<Token> = lex(str);
expectStringToken(tokens[1], 1, "'");
expectStringToken(tokens[3], 7, '"');
});
it('should tokenize escaped quoted string', function() {
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, '>=');
});
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', function() {
// 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']");
});
});
});
}

29
modules/facade/src/lang.es6
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@ -59,22 +59,43 @@ export class StringJoiner {
}
}
export class NumerParseError extends Error {
constructor(message) {
this.message = message;
}
toString() {
return this.message;
}
}
export class NumberWrapper {
static parseIntAutoRadix(text:string):int {
var result:int = parseInt(text);
if (isNaN(result)) {
throw new Error("Invalid integer literal when parsing " + text);
throw new NumerParseError("Invalid integer literal when parsing " + text);
}
return result;
}
static parseInt(text:string, radix:int):int {
var result:int = parseInt(text, radix);
if (isNaN(result)) {
throw new Error("Invalid integer literal when parsing " + text + " in base " + radix);
if (radix == 10) {
if (/^(\-|\+)?[0-9]+$/.test(text)) {
return parseInt(text, radix);
}
} else if (radix == 16) {
if (/^(\-|\+)?[0-9ABCDEFabcdef]+$/.test(text)) {
return parseInt(text, radix);
}
} else {
var result:int = parseInt(text, radix);
if (!isNaN(result)) {
return result;
}
}
throw new NumerParseError("Invalid integer literal when parsing " + text + " in base " + radix);
}
// TODO: NaN is a valid literal but is returned by parseFloat to indicate an error.
static parseFloat(text:string):number {