RefTest: Refactor to not use deprecated Repository.getAllRefs

Change-Id: I21ade27e0a8e57d1dbda49e7c6ecc500d30229b7
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/RefTest.java

@@ -58,7 +58,7 @@ import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.List;
-import java.util.Map;
+import java.util.Optional;
 import java.util.TreeSet;
 
 import org.eclipse.jgit.lib.Ref.Storage;
@@ -148,17 +148,22 @@ public class RefTest extends SampleDataRepositoryTestCase {
 		ObjectId r = db.resolve("refs/remotes/origin/HEAD");
 		assertEquals(masterId, r);
 
-		Map<String, Ref> allRefs = db.getAllRefs();
-		Ref refHEAD = allRefs.get("refs/remotes/origin/HEAD");
-		assertNotNull(refHEAD);
-		assertEquals(masterId, refHEAD.getObjectId());
-		assertFalse(refHEAD.isPeeled());
-		assertNull(refHEAD.getPeeledObjectId());
-
-		Ref refmaster = allRefs.get("refs/remotes/origin/master");
-		assertEquals(masterId, refmaster.getObjectId());
-		assertFalse(refmaster.isPeeled());
-		assertNull(refmaster.getPeeledObjectId());
+		List<Ref> allRefs = db.getRefDatabase().getRefs();
+		Optional<Ref> refHEAD = allRefs.stream()
+				.filter(ref -> ref.getName().equals("refs/remotes/origin/HEAD"))
+				.findAny();
+		assertTrue(refHEAD.isPresent());
+		assertEquals(masterId, refHEAD.get().getObjectId());
+		assertFalse(refHEAD.get().isPeeled());
+		assertNull(refHEAD.get().getPeeledObjectId());
+
+		Optional<Ref> refmaster = allRefs.stream().filter(
+				ref -> ref.getName().equals("refs/remotes/origin/master"))
+				.findAny();
+		assertTrue(refmaster.isPresent());
+		assertEquals(masterId, refmaster.get().getObjectId());
+		assertFalse(refmaster.get().isPeeled());
+		assertNull(refmaster.get().getPeeledObjectId());
 	}
 
 	@Test