Test advertised capabilities with protocol V0 and allow*Sha1InWant

The advertised capabilities with protocol V0 were untested
leading to potential regressions when advertising what
SHA1 should or should not be on the list of capabilities.

Verify that allow-tip-sha1-in-want and allow-reachable-sha1-in-want
are properly advertised with the allow*Sha1InWant is set in
jgit.config.

Change-Id: Id48af2bc19280f2dcb26aa8e8765cde8f2ce7a06
(cherry picked from commit 5583f6a)

org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/UploadPackTest.java

@@ -11,6 +11,7 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
@@ -563,6 +564,47 @@ private void checkUnadvertisedIfUnallowed(String configSection,
 		assertThat(lines, hasItems("ls-refs", "fetch", "server-option"));
 	}
 
+	@Test
+	public void testV0CapabilitiesAllowAnySha1InWant() throws Exception {
+		checkAvertisedCapabilityProtocolV0IfAllowed("uploadpack",
+				"allowanysha1inwant", "allow-reachable-sha1-in-want",
+				"allow-tip-sha1-in-want");
+	}
+
+	@Test
+	public void testV0CapabilitiesAllowReachableSha1InWant() throws Exception {
+		checkAvertisedCapabilityProtocolV0IfAllowed("uploadpack",
+				"allowreachablesha1inwant", "allow-reachable-sha1-in-want");
+	}
+
+	@Test
+	public void testV0CapabilitiesAllowTipSha1InWant() throws Exception {
+		checkAvertisedCapabilityProtocolV0IfAllowed("uploadpack",
+				"allowtipsha1inwant", "allow-tip-sha1-in-want");
+	}
+
+	private void checkAvertisedCapabilityProtocolV0IfAllowed(
+			String configSection, String configName, String... capabilities)
+			throws Exception {
+		server.getConfig().setBoolean(configSection, null, configName, true);
+		ByteArrayInputStream recvStream = uploadPackSetup(
+				TransferConfig.ProtocolVersion.V0.version(), null,
+				PacketLineIn.end());
+		PacketLineIn pckIn = new PacketLineIn(recvStream);
+
+		String line;
+		while (!PacketLineIn.isEnd((line = pckIn.readString()))) {
+			if (line.contains("capabilities")) {
+				List<String> linesCapabilities = Arrays.asList(line.substring(
+						line.indexOf(" ", line.indexOf("capabilities")) + 1)
+						.split(" "));
+				assertThat(linesCapabilities, hasItems(capabilities));
+				return;
+			}
+		}
+		fail("Server side protocol did not contain any capabilities'");
+	}
+
 	@Test
 	public void testV2CapabilitiesAllowFilter() throws Exception {
 		checkAdvertisedIfAllowed("uploadpack", "allowfilter", "filter");