1 files changed, 231 insertions, 0 deletions
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/ProtocolV0ParserTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/ProtocolV0ParserTest.java
new file mode 100644
index 0000000000..61b7fb619a
--- /dev/null
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/ProtocolV0ParserTest.java
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2018, 2022 Google LLC. and others
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Distribution License v. 1.0 which is available at
+ * https://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+package org.eclipse.jgit.transport;
+
+import static org.eclipse.jgit.lib.Constants.OBJ_BLOB;
+import static org.eclipse.jgit.lib.Constants.OBJ_COMMIT;
+import static org.eclipse.jgit.lib.Constants.OBJ_TAG;
+import static org.eclipse.jgit.lib.Constants.OBJ_TREE;
+import static org.eclipse.jgit.transport.ObjectIdMatcher.hasOnlyObjectIds;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.contains;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import org.eclipse.jgit.errors.PackProtocolException;
+import org.eclipse.jgit.lib.Config;
+import org.junit.Test;
+
+public class ProtocolV0ParserTest {
+	/*
+	 * Convert the input lines to the PacketLine that the parser reads.
+	 */
+	private static PacketLineIn formatAsPacketLine(String... inputLines)
+			throws IOException {
+		ByteArrayOutputStream send = new ByteArrayOutputStream();
+		PacketLineOut pckOut = new PacketLineOut(send);
+		for (String line : inputLines) {
+			if (PacketLineIn.isEnd(line)) {
+				pckOut.end();
+			} else if (PacketLineIn.isDelimiter(line)) {
+				pckOut.writeDelim();
+			} else {
+				pckOut.writeString(line);
+			}
+		}
+
+		return new PacketLineIn(new ByteArrayInputStream(send.toByteArray()));
+	}
+
+	private static TransferConfig defaultConfig() {
+		Config rc = new Config();
+		rc.setBoolean("uploadpack", null, "allowfilter", true);
+		return new TransferConfig(rc);
+	}
+
+	@Test
+	public void testRecvWantsWithCapabilities()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(
+				String.join(" ", "want",
+						"4624442d68ee402a94364191085b77137618633e", "thin-pack",
+						"no-progress", "include-tag", "ofs-delta", "\n"),
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities()
+				.contains(GitProtocolConstants.OPTION_THIN_PACK));
+		assertTrue(request.getClientCapabilities()
+				.contains(GitProtocolConstants.OPTION_NO_PROGRESS));
+		assertTrue(request.getClientCapabilities()
+				.contains(GitProtocolConstants.OPTION_INCLUDE_TAG));
+		assertTrue(request.getClientCapabilities()
+				.contains(GitProtocolConstants.CAPABILITY_OFS_DELTA));
+		assertThat(request.getWantIds(),
+				hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+						"f900c8326a43303685c46b279b9f70411bff1a4b"));
+	}
+
+	@Test
+	public void testRecvWantsWithAgent()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(
+				String.join(" ", "want",
+						"4624442d68ee402a94364191085b77137618633e", "thin-pack",
+						"agent=JGit.test/0.0.1", "\n"),
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities()
+				.contains(GitProtocolConstants.OPTION_THIN_PACK));
+		assertEquals(1, request.getClientCapabilities().size());
+		assertEquals("JGit.test/0.0.1", request.getAgent());
+		assertThat(request.getWantIds(),
+				hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+						"f900c8326a43303685c46b279b9f70411bff1a4b"));
+	}
+
+	@Test
+	public void testRecvWantsWithSessionID()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(String.join(" ", "want",
+				"4624442d68ee402a94364191085b77137618633e", "thin-pack",
+				"agent=JGit.test/0.0.1", "session-id=client-session-id", "\n"),
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities()
+				.contains(GitProtocolConstants.OPTION_THIN_PACK));
+		assertEquals(1, request.getClientCapabilities().size());
+		assertEquals("client-session-id", request.getClientSID());
+		assertThat(request.getWantIds(),
+				hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+						"f900c8326a43303685c46b279b9f70411bff1a4b"));
+	}
+
+	/*
+	 * First round of protocol v0 negotiation. Client send wants, no
+	 * capabilities.
+	 */
+	@Test
+	public void testRecvWantsWithoutCapabilities()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(
+				"want 4624442d68ee402a94364191085b77137618633e\n",
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities().isEmpty());
+		assertThat(request.getWantIds(),
+				hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+						"f900c8326a43303685c46b279b9f70411bff1a4b"));
+	}
+
+	@Test
+	public void testRecvWantsDeepen()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(
+				"want 4624442d68ee402a94364191085b77137618633e\n",
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n", "deepen 3\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities().isEmpty());
+		assertEquals(3, request.getDepth());
+		assertThat(request.getWantIds(),
+				hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+						"f900c8326a43303685c46b279b9f70411bff1a4b"));
+	}
+
+	@Test
+	public void testRecvWantsDeepenSince()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(
+				"want 4624442d68ee402a94364191085b77137618633e\n",
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n",
+				"deepen-since 1652773020\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities().isEmpty());
+		assertEquals(1652773020, request.getDeepenSince());
+		assertThat(request.getWantIds(),
+				   hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+									"f900c8326a43303685c46b279b9f70411bff1a4b"));
+	}
+
+	@Test
+	public void testRecvWantsDeepenNots()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(
+				"want 4624442d68ee402a94364191085b77137618633e\n",
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n",
+				"deepen-not 856d5138d7269a483efe276d4a6b5c25b4fbb1a4\n",
+				"deepen-not heads/refs/test\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities().isEmpty());
+		assertThat(request.getDeepenNots(), contains("856d5138d7269a483efe276d4a6b5c25b4fbb1a4",
+													 "heads/refs/test"));
+		assertThat(request.getWantIds(),
+				   hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+									"f900c8326a43303685c46b279b9f70411bff1a4b"));
+	}
+
+	@Test
+	public void testRecvWantsShallow()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(
+				"want 4624442d68ee402a94364191085b77137618633e\n",
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n",
+				"shallow 4b643d0ef739a1b494e7d6926d8d8ed80d35edf4\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities().isEmpty());
+		assertThat(request.getWantIds(),
+				hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+						"f900c8326a43303685c46b279b9f70411bff1a4b"));
+		assertThat(request.getClientShallowCommits(),
+				hasOnlyObjectIds("4b643d0ef739a1b494e7d6926d8d8ed80d35edf4"));
+	}
+
+	@Test
+	public void testRecvWantsFilter()
+			throws PackProtocolException, IOException {
+		PacketLineIn pckIn = formatAsPacketLine(
+				"want 4624442d68ee402a94364191085b77137618633e\n",
+				"want f900c8326a43303685c46b279b9f70411bff1a4b\n",
+				"filter blob:limit=13000\n",
+				PacketLineIn.end());
+		ProtocolV0Parser parser = new ProtocolV0Parser(defaultConfig());
+		FetchV0Request request = parser.recvWants(pckIn);
+		assertTrue(request.getClientCapabilities().isEmpty());
+		assertThat(request.getWantIds(),
+				hasOnlyObjectIds("4624442d68ee402a94364191085b77137618633e",
+						"f900c8326a43303685c46b279b9f70411bff1a4b"));
+		assertTrue(request.getFilterSpec().allowsType(OBJ_BLOB));
+		assertTrue(request.getFilterSpec().allowsType(OBJ_TREE));
+		assertTrue(request.getFilterSpec().allowsType(OBJ_COMMIT));
+		assertTrue(request.getFilterSpec().allowsType(OBJ_TAG));
+		assertEquals(13000, request.getFilterSpec().getBlobLimit());
+		assertEquals(-1, request.getFilterSpec().getTreeDepthLimit());
+	}
+
+}