/
tokenizer.js
153 lines (125 loc) · 4.47 KB
/
tokenizer.js
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var assert = require('assert');
var Tokenizer = require('../lib').Tokenizer;
describe('parser/tokenizer', function() {
var css = '.test\n{\n prop: url(foo/bar.jpg);\n}';
var tokens = [
{ offset: 0, type: 'FullStop' },
{ offset: 1, type: 'Identifier' },
{ offset: 5, type: 'Whitespace' },
{ offset: 6, type: 'LeftCurlyBracket' },
{ offset: 7, type: 'Whitespace' },
{ offset: 10, type: 'Identifier' },
{ offset: 14, type: 'Colon' },
{ offset: 15, type: 'Whitespace' },
{ offset: 16, type: 'Identifier' },
{ offset: 19, type: 'LeftParenthesis' },
{ offset: 20, type: 'Identifier' },
{ offset: 23, type: 'Solidus' },
{ offset: 24, type: 'Identifier' },
{ offset: 27, type: 'FullStop' },
{ offset: 28, type: 'Identifier' },
{ offset: 31, type: 'RightParenthesis' },
{ offset: 32, type: 'Semicolon' },
{ offset: 33, type: 'Whitespace' },
{ offset: 34, type: 'RightCurlyBracket' }
];
var types = tokens.map(function(token) {
return token.type;
});
var start = tokens.map(function(token) {
return token.offset;
});
var end = tokens.map(function(token, idx, tokens) {
return idx + 1 < tokens.length ? tokens[idx + 1].offset : css.length;
});
it('edge case: no arguments', function() {
var tokenizer = new Tokenizer();
assert.equal(tokenizer.eof, true);
assert.equal(tokenizer.tokenType, 0);
assert.equal(tokenizer.source, '');
});
it('edge case: empty input', function() {
var tokenizer = new Tokenizer('');
assert.equal(tokenizer.eof, true);
assert.equal(tokenizer.tokenType, 0);
assert.equal(tokenizer.source, '');
});
it('should convert input to string', function() {
var tokenizer = new Tokenizer({
toString: function() {
return css;
}
});
assert.equal(tokenizer.source, css);
});
it('should accept a Buffer', function() {
var tokenizer = new Tokenizer(new Buffer(css));
assert.equal(tokenizer.source, css);
});
it('getTypes()', function() {
var tokenizer = new Tokenizer(css);
assert.deepEqual(tokenizer.getTypes(), types);
});
it('next() types', function() {
var tokenizer = new Tokenizer(css);
var actual = [];
while (!tokenizer.eof) {
actual.push(Tokenizer.NAME[tokenizer.tokenType]);
tokenizer.next();
}
assert.deepEqual(actual, types);
});
it('next() start', function() {
var tokenizer = new Tokenizer(css);
var actual = [];
while (!tokenizer.eof) {
actual.push(tokenizer.tokenStart);
tokenizer.next();
}
assert.deepEqual(actual, start);
});
it('next() end', function() {
var tokenizer = new Tokenizer(css);
var actual = [];
while (!tokenizer.eof) {
actual.push(tokenizer.tokenEnd);
tokenizer.next();
}
assert.deepEqual(actual, end);
});
it('skip()', function() {
var tokenizer = new Tokenizer(css);
var targetTokens = tokens
.filter(function(token) {
return token.type === 'Identifier' || token.type === 'FullStop';
});
var actual = targetTokens
.map(function(token, idx, idents) {
return idx ? tokens.indexOf(token) - tokens.indexOf(idents[idx - 1]) : tokens.indexOf(token);
})
.map(function(skip) {
tokenizer.skip(skip);
return Tokenizer.NAME[tokenizer.tokenType];
});
assert.equal(actual.length, 8); // 6 x Indentifier + 2 x FullStop
assert.deepEqual(actual, targetTokens.map(function(token) {
return token.type;
}));
});
it('skip() to end', function() {
var tokenizer = new Tokenizer(css);
tokenizer.skip(tokens.length);
assert.equal(tokenizer.eof, true);
});
it('dynamic buffer', function() {
var bufferSize = new Tokenizer(css).offsetAndType.length + 10;
var tokenizer = new Tokenizer(new Array(bufferSize + 1).join('.'));
var count = 0;
while (!tokenizer.eof) {
count++;
tokenizer.next();
}
assert.equal(count, bufferSize);
assert(tokenizer.offsetAndType.length >= bufferSize);
});
});