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node_modules/token-stream/test/index.js

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+'use strict';
+
+var assert = require('assert');
+var TokenStream = require('../');
+
+assert.throws(function () {
+  new TokenStream('foo,bar');
+});
+var stream = new TokenStream([
+  'a',
+  'b',
+  'c',
+  'd'
+]);
+assert.throws(function () {
+  stream.lookahead(9);
+});
+assert(stream.peek() === 'a');
+assert(stream.lookahead(0) == 'a');
+assert(stream.lookahead(1) == 'b');
+
+assert(stream.advance() === 'a');
+assert(stream.peek() === 'b');
+assert(stream.lookahead(0) == 'b');
+assert(stream.lookahead(1) == 'c');
+
+stream.defer('z');
+assert(stream.peek() === 'z');
+assert(stream.lookahead(0) == 'z');
+assert(stream.lookahead(1) == 'b');
+assert(stream.advance() === 'z');
+assert(stream.advance() === 'b');
+assert(stream.advance() === 'c');
+assert(stream.advance() === 'd');
+assert.throws(function () {
+  stream.peek();
+});
+assert.throws(function () {
+  stream.lookahead(0);
+});
+assert.throws(function () {
+  stream.lookahead(1);
+});
+assert.throws(function () {
+  stream.advance();
+});