Fix Buck build broken by 4812fda.

Creates a source directory under org.eclipse.jgit.http.test
for the new support class.

Signed-off-by: Michael Edgar <adgar@google.com>
Change-Id: Ie49492c2bbe5c1db96ceb0dc06fa7cb9f927431a

1 files changed, 52 insertions, 0 deletions

diff --git a/org.eclipse.jgit.http.test/src/org/eclipse/jgit/http/test/RefsUnreadableInMemoryRepository.java b/org.eclipse.jgit.http.test/src/org/eclipse/jgit/http/test/RefsUnreadableInMemoryRepository.java
new file mode 100644
index 0000000000..485cced778
--- /dev/null
+++ b/org.eclipse.jgit.http.test/src/org/eclipse/jgit/http/test/RefsUnreadableInMemoryRepository.java
@@ -0,0 +1,52 @@
+package org.eclipse.jgit.http.test;
+
+import java.io.IOException;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription;
+import org.eclipse.jgit.internal.storage.dfs.InMemoryRepository;
+import org.eclipse.jgit.lib.RefDatabase;
+
+/**
+ * An {@link InMemoryRepository} whose refs can be made unreadable for testing
+ * purposes.
+ */
+class RefsUnreadableInMemoryRepository extends InMemoryRepository {
+
+	private final RefsUnreadableRefDatabase refs;
+
+	private volatile boolean failing;
+
+	RefsUnreadableInMemoryRepository(DfsRepositoryDescription repoDesc) {
+		super(repoDesc);
+		refs = new RefsUnreadableRefDatabase();
+		failing = false;
+	}
+
+	@Override
+	public RefDatabase getRefDatabase() {
+		return refs;
+	}
+
+	/**
+	 * Make the ref database unable to scan its refs.
+	 * <p>
+	 * It may be useful to follow a call to startFailing with a call to
+	 * {@link RefDatabase#refresh()}, ensuring the next ref read fails.
+	 */
+	void startFailing() {
+		failing = true;
+	}
+
+	private class RefsUnreadableRefDatabase extends MemRefDatabase {
+
+		@Override
+		protected RefCache scanAllRefs() throws IOException {
+			if (failing) {
+				throw new IOException("disk failed, no refs found");
+			} else {
+				return super.scanAllRefs();
+			}
+		}
+	}
+}