add latest release

src/main/java/org/kohsuke/github/GHRepository.java

@@ -298,6 +298,14 @@ public GHRef createRef(String name, String sha) throws IOException {
     public List<GHRelease> getReleases() throws IOException {
         return listReleases().asList();
     }
+
+    public GHRelease getLatestRelease() throws IOException {
+        try {
+            return root.retrieve().to(getApiTailUrl("releases/latest"), GHRelease.class).wrap(this);
+        } catch (FileNotFoundException e) {
+            return null; // no latest release
+        }
+    }
 
     public PagedIterable<GHRelease> listReleases() throws IOException {
         return new PagedIterable<GHRelease>() {

src/test/java/org/kohsuke/github/RepositoryTest.java

@@ -67,6 +67,32 @@ public void getPermission() throws Exception {
             }
         }
     }
+
+
+
+	@Test
+	public void LatestRepositoryExist() {
+		try {
+			// add the repository that have latest release
+			GHRelease release = gitHub.getRepository("kamontat/CheckIDNumber").getLatestRelease();
+			assertEquals("v3.0", release.getTagName());
+		} catch (IOException e) {
+			e.printStackTrace();
+			fail();
+		}
+	}
+
+	@Test
+	public void LatestRepositoryNotExist() {
+		try {
+			// add the repository that `NOT` have latest release
+			GHRelease release = gitHub.getRepository("kamontat/Java8Example").getLatestRelease();
+			assertNull(release);
+		} catch (IOException e) {
+			e.printStackTrace();
+			fail();
+		}
+	}
 
     private GHRepository getRepository() throws IOException {
         return gitHub.getOrganization("github-api-test-org").getRepository("jenkins");