Add tests that reproduce #1384.

services/git-bridge/src/test/java/uk/ac/ic/wlgitbridge/snapshot/push/PostbackManagerTest.java

@@ -0,0 +1,41 @@
+package uk.ac.ic.wlgitbridge.snapshot.push;
+
+import org.junit.Assert;
+import org.junit.Test;
+import uk.ac.ic.wlgitbridge.snapshot.push.exception.InternalErrorException;
+import uk.ac.ic.wlgitbridge.snapshot.push.exception.SnapshotPostException;
+import uk.ac.ic.wlgitbridge.snapshot.push.exception.UnexpectedPostbackException;
+
+/**
+ * Created by winston on 05/04/2016.
+ */
+public class PostbackManagerTest {
+
+    private final PostbackManager postbackManager = new PostbackManager();
+
+    @Test
+    public void testRaceWithVersionId()
+            throws UnexpectedPostbackException,
+                   SnapshotPostException {
+        String key = postbackManager.makeKeyForProject("proj");
+        postbackManager.postVersionIDForProject("proj", 1, key);
+        int versionId = postbackManager.waitForVersionIdOrThrow("proj");
+        Assert.assertEquals("Version id didn't match posted", 1, versionId);
+    }
+
+    @Test
+    public void testRaceWithException() throws UnexpectedPostbackException,
+                                               SnapshotPostException {
+        String key = postbackManager.makeKeyForProject("proj");
+        InternalErrorException ex = new InternalErrorException();
+        postbackManager.postExceptionForProject("proj", ex, key);
+        try {
+            postbackManager.waitForVersionIdOrThrow("proj");
+        } catch (InternalErrorException e) {
+            Assert.assertSame("Wrong exception was thrown", ex, e);
+            return;
+        }
+        Assert.fail("Exception wasn't thrown as required");
+    }
+
+}