Create noop db store and test file

services/git-bridge/src/test/java/uk/ac/ic/wlgitbridge/bridge/resource/UrlResourceCacheTest.java

@@ -0,0 +1,42 @@
+package uk.ac.ic.wlgitbridge.bridge.resource;
+
+import org.junit.Test;
+import uk.ac.ic.wlgitbridge.bridge.db.noop.NoopDbStore;
+import uk.ac.ic.wlgitbridge.io.http.ning.NingHttpClientFacade;
+
+import java.util.Collections;
+import java.util.Optional;
+
+import static org.mockito.Mockito.mock;
+
+public class UrlResourceCacheTest {
+
+    private static String PROJ = "proj";
+
+    private static String URL = "http://localhost/file.jpg";
+
+    private static String NEW_PATH = "file1.jpg";
+
+    private final NingHttpClientFacade http = mock(NingHttpClientFacade.class);
+
+    private final UrlResourceCache cache
+            = new UrlResourceCache(new NoopDbStore(), http);
+
+    @Test
+    public void getThrowsSizeLimitWhenContentLengthTooBig() throws Exception {
+        when(http.get(any(), any())).thenAnswer(invoc -> {
+            Object[] args = invoc.getArguments();
+            //noinspection unchecked
+            ((FunctionT<
+                    HttpResponseHeaders, Boolean, SizeLimitExceededException
+            >) args[1]).apply(withContentLength(2));
+            return new byte[0];
+        });
+
+        cache.get(
+                PROJ, URL, NEW_PATH,
+                Collections.emptyMap(), Collections.emptyMap(),
+                Optional.of(2L)
+        );
+    }
+}