TileCache tests

src/tilecache.js

@@ -155,7 +155,7 @@ $.TileCache.prototype = /** @lends OpenSeadragon.TileCache.prototype */{
 
         // Note that just because we're unloading a tile doesn't necessarily mean
         // we're unloading an image. With repeated calls it should sort itself out, though.
-        if ( this._imagesLoadedCount >= this._maxImageCacheCount ) {
+        if ( this._imagesLoadedCount > this._maxImageCacheCount ) {
             var worstTile       = null;
             var worstTileIndex  = -1;
             var prevTile, worstTime, worstLevel, prevTime, prevLevel, prevTileRecord;

test/coverage.html

@@ -69,6 +69,7 @@
     <script src="/test/modules/world.js"></script>
     <script src="/test/modules/drawer.js"></script>
     <script src="/test/modules/tiledimage.js"></script>
+    <script src="/test/modules/tilecache.js"></script>
     <!-- The navigator tests are the slowest (for now; hopefully they can be sped up)
     so we put them last. -->
     <script src="/test/modules/navigator.js"></script>

test/modules/tilecache.js

@@ -0,0 +1,111 @@
+/* global module, asyncTest, $, ok, equal, notEqual, start, test, Util, testLog */
+
+(function() {
+
+    // ----------
+    module('TileCache', {
+        setup: function () {
+            testLog.reset();
+        },
+        teardown: function () {
+        }
+    });
+
+    // ----------
+    asyncTest('basics', function() {
+        var fakeTiledImage0 = {};
+        var fakeTiledImage1 = {};
+
+        var fakeTile0 = {
+            url: 'foo.jpg',
+            image: {},
+            unload: function() {}
+        };
+
+        var fakeTile1 = {
+            url: 'foo.jpg',
+            image: {},
+            unload: function() {}
+        };
+
+        var cache = new OpenSeadragon.TileCache();
+        equal(cache.numTilesLoaded(), 0, 'no tiles to begin with');
+
+        cache.cacheTile({
+            tile: fakeTile0,
+            tiledImage: fakeTiledImage0
+        });
+
+        equal(cache.numTilesLoaded(), 1, 'tile count after cache');
+
+        cache.cacheTile({
+            tile: fakeTile1,
+            tiledImage: fakeTiledImage1
+        });
+
+        equal(cache.numTilesLoaded(), 2, 'tile count after second cache');
+
+        cache.clearTilesFor(fakeTiledImage0);
+
+        equal(cache.numTilesLoaded(), 1, 'tile count after first clear');
+
+        cache.clearTilesFor(fakeTiledImage1);
+
+        equal(cache.numTilesLoaded(), 0, 'tile count after second clear');
+
+        start();
+    });
+
+    // ----------
+    asyncTest('maxImageCacheCount', function() {
+        var fakeTiledImage0 = {};
+
+        var fakeTile0 = {
+            url: 'different.jpg',
+            image: {},
+            unload: function() {}
+        };
+
+        var fakeTile1 = {
+            url: 'same.jpg',
+            image: {},
+            unload: function() {}
+        };
+
+        var fakeTile2 = {
+            url: 'same.jpg',
+            image: {},
+            unload: function() {}
+        };
+
+        var cache = new OpenSeadragon.TileCache({
+            maxImageCacheCount: 1
+        });
+
+        equal(cache.numTilesLoaded(), 0, 'no tiles to begin with');
+
+        cache.cacheTile({
+            tile: fakeTile0,
+            tiledImage: fakeTiledImage0
+        });
+
+        equal(cache.numTilesLoaded(), 1, 'tile count after add');
+
+        cache.cacheTile({
+            tile: fakeTile1,
+            tiledImage: fakeTiledImage0
+        });
+
+        equal(cache.numTilesLoaded(), 1, 'tile count after add of second image');
+
+        cache.cacheTile({
+            tile: fakeTile2,
+            tiledImage: fakeTiledImage0
+        });
+
+        equal(cache.numTilesLoaded(), 2, 'tile count after additional same image');
+
+        start();
+    });
+
+})();

test/test.html

@@ -34,6 +34,7 @@
     <script src="/test/modules/world.js"></script>
     <script src="/test/modules/drawer.js"></script>
     <script src="/test/modules/tiledimage.js"></script>
+    <script src="/test/modules/tilecache.js"></script>
     <!-- The navigator tests are the slowest (for now; hopefully they can be sped up)
     so we put them last. -->
     <script src="/test/modules/navigator.js"></script>