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diff --git a/getdown/src/getdown/core/src/test/java/com/threerings/getdown/cache/ResourceCacheTest.java b/getdown/src/getdown/core/src/test/java/com/threerings/getdown/cache/ResourceCacheTest.java
new file mode 100644
index 0000000..860c72a
--- /dev/null
+++ b/getdown/src/getdown/core/src/test/java/com/threerings/getdown/cache/ResourceCacheTest.java
@@ -0,0 +1,72 @@
+//
+// Getdown - application installer, patcher and launcher
+// Copyright (C) 2004-2018 Getdown authors
+// https://github.com/threerings/getdown/blob/master/LICENSE
+
+package com.threerings.getdown.cache;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+
+import org.junit.*;
+import org.junit.rules.TemporaryFolder;
+
+import static org.junit.Assert.*;
+
+/**
+ * Asserts the correct functionality of the {@link ResourceCache}.
+ */
+public class ResourceCacheTest
+{
+    @Before public void setupCache () throws IOException {
+        _fileToCache = _folder.newFile("filetocache.jar");
+        _cache = new ResourceCache(_folder.newFolder(".cache"));
+    }
+
+    @Test public void shouldCacheFile () throws IOException
+    {
+        assertEquals("abc123.jar", cacheFile().getName());
+    }
+
+    private File cacheFile() throws IOException
+    {
+        return _cache.cacheFile(_fileToCache, "abc123", "abc123");
+    }
+
+    @Test public void shouldTrackFileUsage () throws IOException
+    {
+        String name = "abc123.jar" + ResourceCache.LAST_ACCESSED_FILE_SUFFIX;
+        File lastAccessedFile = new File(cacheFile().getParentFile(), name);
+        assertTrue(lastAccessedFile.exists());
+    }
+
+    @Test public void shouldNotCacheTheSameFile () throws Exception
+    {
+        File cachedFile = cacheFile();
+        cachedFile.setLastModified(YESTERDAY);
+        long expectedLastModified = cachedFile.lastModified();
+        // caching it another time
+        File sameCachedFile = cacheFile();
+        assertEquals(expectedLastModified, sameCachedFile.lastModified());
+    }
+
+    @Test public void shouldRememberWhenFileWasRequested () throws Exception
+    {
+        File cachedFile = cacheFile();
+        String name = cachedFile.getName() + ResourceCache.LAST_ACCESSED_FILE_SUFFIX;
+        File lastAccessedFile = new File(cachedFile.getParentFile(), name);
+        lastAccessedFile.setLastModified(YESTERDAY);
+        long lastAccessed = lastAccessedFile.lastModified();
+        // caching it another time
+        cacheFile();
+        assertTrue(lastAccessedFile.lastModified() > lastAccessed);
+    }
+
+    @Rule public TemporaryFolder _folder = new TemporaryFolder();
+
+    private File _fileToCache;
+    private ResourceCache _cache;
+
+    private static final long YESTERDAY = System.currentTimeMillis() - TimeUnit.DAYS.toMillis(1);
+}