b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
83 lines
3 KiB
JavaScript
Executable file
83 lines
3 KiB
JavaScript
Executable file
'use strict';
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/* global Downsample */
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require('/shared/js/media/downsample.js');
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suite('Downsample tests', function() {
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test('Check API', function() {
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assert.typeOf(Downsample, 'object');
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assert.typeOf(Downsample.sizeAtLeast, 'function');
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assert.typeOf(Downsample.sizeNoMoreThan, 'function');
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assert.typeOf(Downsample.areaAtLeast, 'function');
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assert.typeOf(Downsample.areaNoMoreThan, 'function');
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assert.typeOf(Downsample.MAX_SIZE_REDUCTION, 'number');
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assert.typeOf(Downsample.MAX_AREA_REDUCTION, 'number');
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assert.typeOf(Downsample.NONE, 'object');
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assert.equal(Downsample.NONE.dimensionScale, 1);
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assert.equal(Downsample.NONE.areaScale, 1);
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assert.equal(Downsample.NONE.toString(), '');
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});
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var scales = [
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10, 2, 1,
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1 / 8, 2 / 8, 3 / 8, 4 / 8, 5 / 8, 6 / 8, 7 / 8,
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0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1,
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0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, 0.01
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];
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// This is the same function we use in downsample.js
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function round(x) {
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return Math.round(x * 100) / 100;
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}
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test('sizeAtLeast', function() {
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var min = 1 / Downsample.MAX_SIZE_REDUCTION;
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scales.forEach(function(scale) {
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var ds = Downsample.sizeAtLeast(scale);
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assert.operator(ds.dimensionScale, '<=', round(Math.max(scale, min)));
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assert.equal(ds.scale(100), ds.dimensionScale * 100);
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assert.ok(ds === Downsample.NONE || ds.toString()[0] === '#');
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});
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});
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test('areaAtLeast', function() {
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var min = 1 / Downsample.MAX_AREA_REDUCTION;
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scales.forEach(function(scale) {
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var ds = Downsample.areaAtLeast(scale);
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assert.operator(ds.areaScale, '<=', round(Math.max(scale, min)));
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ds = Downsample.areaAtLeast(scale * scale);
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assert.operator(ds.areaScale, '<=', round(Math.max(scale * scale, min)));
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assert.equal(ds.scale(100), ds.dimensionScale * 100);
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assert.ok(ds === Downsample.NONE || ds.toString()[0] === '#');
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});
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});
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test('sizeNoMoreThan', function() {
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scales.forEach(function(scale) {
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var ds = Downsample.sizeNoMoreThan(scale);
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assert.operator(ds.dimensionScale, '>=', round(Math.min(scale, 1)));
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assert.equal(ds.scale(100), ds.dimensionScale * 100);
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assert.ok(ds === Downsample.NONE || ds.toString()[0] === '#');
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});
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});
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test('areaNoMoreThan', function() {
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scales.forEach(function(scale) {
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var ds = Downsample.areaNoMoreThan(scale);
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assert.operator(ds.areaScale, '>=', round(Math.min(scale, 1)));
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ds = Downsample.areaNoMoreThan(scale * scale);
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assert.operator(ds.areaScale, '>=', round(Math.min(scale * scale, 1)));
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assert.equal(ds.scale(100), ds.dimensionScale * 100);
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assert.ok(ds === Downsample.NONE || ds.toString()[0] === '#');
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});
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});
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test('max reduction amounts', function() {
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var ds = Downsample.sizeNoMoreThan(0);
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assert.equal(ds.dimensionScale, round(1 / Downsample.MAX_SIZE_REDUCTION));
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assert.equal(ds.areaScale, round(1 / Downsample.MAX_AREA_REDUCTION));
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});
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});
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