tests for cache trimming (#112, PR 114)

Author: danikula

test/src/test/java/com/danikula/videocache/HttpProxyCacheServerTest.java

@@ -296,6 +296,48 @@ public void testGetProxiedUrlForExistedCache() throws Exception {
         proxy.shutdown();
     }
 
+    @Test
+    public void testTrimFileCacheForTotalCountLru() throws Exception {
+        FileNameGenerator fileNameGenerator = new Md5FileNameGenerator();
+        HttpProxyCacheServer proxy = new HttpProxyCacheServer.Builder(RuntimeEnvironment.application)
+                .cacheDirectory(cacheFolder)
+                .fileNameGenerator(fileNameGenerator)
+                .maxCacheFilesCount(2)
+                .build();
+        readProxyResponse(proxy, proxy.getProxyUrl(HTTP_DATA_URL), 0);
+        assertThat(new File(cacheFolder, fileNameGenerator.generate(HTTP_DATA_URL))).exists();
+
+        readProxyResponse(proxy, proxy.getProxyUrl(HTTP_DATA_URL_ONE_REDIRECT), 0);
+        assertThat(new File(cacheFolder, fileNameGenerator.generate(HTTP_DATA_URL_ONE_REDIRECT))).exists();
+
+        readProxyResponse(proxy, proxy.getProxyUrl(HTTP_DATA_URL_3_REDIRECTS), 0);
+        assertThat(new File(cacheFolder, fileNameGenerator.generate(HTTP_DATA_URL_3_REDIRECTS))).exists();
+
+        waitForAsyncTrimming();
+        assertThat(new File(cacheFolder, fileNameGenerator.generate(HTTP_DATA_URL))).doesNotExist();
+    }
+
+    @Test
+    public void testTrimFileCacheForTotalSizeLru() throws Exception {
+        FileNameGenerator fileNameGenerator = new Md5FileNameGenerator();
+        HttpProxyCacheServer proxy = new HttpProxyCacheServer.Builder(RuntimeEnvironment.application)
+                .cacheDirectory(cacheFolder)
+                .fileNameGenerator(fileNameGenerator)
+                .maxCacheSize(HTTP_DATA_SIZE * 3 - 1)
+                .build();
+        readProxyResponse(proxy, proxy.getProxyUrl(HTTP_DATA_URL), 0);
+        assertThat(new File(cacheFolder, fileNameGenerator.generate(HTTP_DATA_URL))).exists();
+
+        readProxyResponse(proxy, proxy.getProxyUrl(HTTP_DATA_URL_ONE_REDIRECT), 0);
+        assertThat(new File(cacheFolder, fileNameGenerator.generate(HTTP_DATA_URL_ONE_REDIRECT))).exists();
+
+        readProxyResponse(proxy, proxy.getProxyUrl(HTTP_DATA_URL_3_REDIRECTS), 0);
+        assertThat(new File(cacheFolder, fileNameGenerator.generate(HTTP_DATA_URL_3_REDIRECTS))).exists();
+
+        waitForAsyncTrimming();
+        assertThat(new File(cacheFolder, fileNameGenerator.generate(HTTP_DATA_URL))).doesNotExist();
+    }
+
     private Pair<File, Response> readProxyData(String url, int offset) throws IOException {
         File file = file(cacheFolder, url);
         HttpProxyCacheServer proxy = newProxy(cacheFolder);
@@ -321,4 +363,8 @@ private HttpProxyCacheServer newProxy(File cacheDir) {
                 .cacheDirectory(cacheDir)
                 .build();
     }
+
+    private void waitForAsyncTrimming() throws InterruptedException {
+        Thread.sleep(500);
+    }
 }

test/src/test/java/com/danikula/videocache/file/FileCacheTest.java

@@ -1,7 +1,6 @@
 package com.danikula.videocache.file;
 
 import com.danikula.android.garden.io.Files;
-import com.danikula.android.garden.io.IoUtils;
 import com.danikula.videocache.BaseTest;
 import com.danikula.videocache.Cache;
 import com.danikula.videocache.ProxyCacheException;
@@ -11,6 +10,7 @@
 import org.junit.Test;
 
 import java.io.File;
+import java.io.IOException;
 import java.util.Arrays;
 
 import static com.danikula.videocache.support.ProxyCacheTestUtils.ASSETS_DATA_NAME;
@@ -19,6 +19,7 @@
 import static com.danikula.videocache.support.ProxyCacheTestUtils.getTempFile;
 import static com.danikula.videocache.support.ProxyCacheTestUtils.loadAssetFile;
 import static com.danikula.videocache.support.ProxyCacheTestUtils.newCacheFile;
+import static com.google.common.io.Files.write;
 import static org.fest.assertions.api.Assertions.assertThat;
 
 /**
@@ -95,7 +96,8 @@ public void testAppendDiscCache() throws Exception {
     public void testIsFileCacheCompleted() throws Exception {
         File file = newCacheFile();
         File partialFile = new File(file.getParentFile(), file.getName() + ".download");
-        IoUtils.saveToFile(loadAssetFile(ASSETS_DATA_NAME), partialFile);
+        write(loadAssetFile(ASSETS_DATA_NAME), partialFile);
+        write(loadAssetFile(ASSETS_DATA_NAME), partialFile);
         Cache fileCache = new FileCache(partialFile);
 
         assertThat(file.exists()).isFalse();
@@ -114,7 +116,7 @@ public void testIsFileCacheCompleted() throws Exception {
     @Test(expected = ProxyCacheException.class)
     public void testErrorWritingCompletedCache() throws Exception {
         File file = newCacheFile();
-        IoUtils.saveToFile(loadAssetFile(ASSETS_DATA_NAME), file);
+        write(loadAssetFile(ASSETS_DATA_NAME), file);
         FileCache fileCache = new FileCache(file);
         fileCache.append(generate(100), 20);
         Assert.fail();
@@ -124,7 +126,7 @@ public void testErrorWritingCompletedCache() throws Exception {
     public void testErrorWritingAfterCompletion() throws Exception {
         File file = newCacheFile();
         File partialFile = new File(file.getParentFile(), file.getName() + ".download");
-        IoUtils.saveToFile(loadAssetFile(ASSETS_DATA_NAME), partialFile);
+        write(loadAssetFile(ASSETS_DATA_NAME), partialFile);
         FileCache fileCache = new FileCache(partialFile);
         fileCache.complete();
         fileCache.append(generate(100), 20);
@@ -140,4 +142,45 @@ public void testFileErrorForDiscCache() throws Exception {
         fileCache.available();
         Assert.fail();
     }
+
+    @Test
+    public void testTrimAfterCompletionForTotalCountLru() throws Exception {
+        File cacheDir = newCacheFile();
+        DiskUsage diskUsage = new TotalCountLruDiskUsage(2);
+        byte[] data = loadAssetFile(ASSETS_DATA_NAME);
+        saveAndCompleteCache(diskUsage, data,
+                new File(cacheDir, "0.dat"),
+                new File(cacheDir, "1.dat"),
+                new File(cacheDir, "2.dat")
+        );
+        waitForAsyncTrimming();
+        assertThat(new File(cacheDir, "0.dat")).doesNotExist();
+    }
+
+    @Test
+    public void testTrimAfterCompletionForTotalSizeLru() throws Exception {
+        File cacheDir = newCacheFile();
+        byte[] data = loadAssetFile(ASSETS_DATA_NAME);
+        DiskUsage diskUsage = new TotalSizeLruDiskUsage(data.length*3-1);
+        saveAndCompleteCache(diskUsage, data,
+                new File(cacheDir, "0.dat"),
+                new File(cacheDir, "1.dat"),
+                new File(cacheDir, "2.dat")
+        );
+        waitForAsyncTrimming();
+        assertThat(new File(cacheDir, "0.dat")).doesNotExist();
+    }
+
+    private void saveAndCompleteCache(DiskUsage diskUsage, byte[] data, File... files) throws ProxyCacheException, IOException {
+        for (File file : files) {
+            FileCache fileCache = new FileCache(file, diskUsage);
+            fileCache.append(data, data.length);
+            fileCache.complete();
+            assertThat(file).exists();
+        }
+    }
+
+    private void waitForAsyncTrimming() throws InterruptedException {
+        Thread.sleep(500);
+    }
 }