44 lines
1.3 KiB
44 lines
1.3 KiB
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */ |
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/* globals expect, it, describe, beforeEach, Stream, PredictorStream, Dict */ |
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'use strict'; |
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describe('stream', function() { |
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beforeEach(function() { |
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this.addMatchers({ |
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toMatchTypedArray: function(expected) { |
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var actual = this.actual; |
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if (actual.length !== expected.length) { |
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return false; |
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} |
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for (var i = 0, ii = expected.length; i < ii; i++) { |
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var a = actual[i], b = expected[i]; |
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if (a !== b) { |
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return false; |
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} |
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} |
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return true; |
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} |
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}); |
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}); |
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describe('PredictorStream', function() { |
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it('should decode simple predictor data', function() { |
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var dict = new Dict(); |
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dict.set('Predictor', 12); |
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dict.set('Colors', 1); |
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dict.set('BitsPerComponent', 8); |
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dict.set('Columns', 2); |
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var input = new Stream(new Uint8Array([2, 100, 3, 2, 1, 255, 2, 1, 255]), |
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0, 9, dict); |
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var predictor = new PredictorStream(input, /* length = */ 9, dict); |
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var result = predictor.getBytes(6); |
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expect(result).toMatchTypedArray( |
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new Uint8Array([100, 3, 101, 2, 102, 1]) |
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); |
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}); |
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}); |
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}); |
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