Get branch directly, exclude load of everythign (#250)

* Get branch directly, exclude load of everythign

* Fix test

Author: KostyaSha

github-pullrequest-plugin/src/main/java/com/github/kostyasha/github/integration/branch/GitHubBranchTrigger.java

@@ -28,6 +28,7 @@
 import javax.annotation.CheckForNull;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Date;
@@ -257,10 +258,14 @@ private Set<GHBranch> branchesToCheck(@CheckForNull String branch, @Nonnull GHRe
         final LinkedHashSet<GHBranch> ghBranches = new LinkedHashSet<>();
 
         if (branch != null) {
-            final GHBranch ghBranch = remoteRepo.getBranches().get(branch);
-            if (ghBranch != null) {
-                ghBranches.add(ghBranch);
+            try {
+                GHBranch ghBranch = remoteRepo.getBranch(branch);
+                if (ghBranch != null) {
+                    ghBranches.add(ghBranch);
+                }
+            } catch (FileNotFoundException ignore) {
             }
+
         } else {
             ghBranches.addAll(remoteRepo.getBranches().values());
         }

github-pullrequest-plugin/src/test/java/com/github/kostyasha/github/integration/branch/GitHubBranchTriggerTest.java

@@ -51,6 +51,7 @@ public class GitHubBranchTriggerTest {
             ))
             .stubRateLimit()
             .stubUser()
+            .stubRepoBranchShouldChange()
             .stubRepoBranches()
             .stubRepo()
             .stubStatuses();

github-pullrequest-plugin/src/test/java/com/github/kostyasha/github/integration/branch/test/GHMockRule.java

@@ -114,6 +114,18 @@ public GHMockRule stubRepoBranches() {
         });
     }
 
+    public GHMockRule stubRepoBranchShouldChange() {
+        return addSetup(() -> {
+            String repo = format("/repos/%s/%s/branches/should-change", REPO.getUserName(), REPO.getRepositoryName());
+            service().stubFor(
+                    get(urlEqualTo(repo))
+                            .willReturn(aResponse()
+                                    .withStatus(200)
+                                    .withHeader("Content-Type", "application/json; charset=utf-8")
+                                    .withBody(classpath(GHMockRule.class, "branch-should-change.json"))));
+        });
+    }
+
     /**
      * Stubs /repos/org/repo response with predefined content
      * <p>

github-pullrequest-plugin/src/test/resources/com/github/kostyasha/github/integration/branch/test/GHMockRule/branch-should-change.json

@@ -0,0 +1,20 @@
+{
+  "name": "should-change",
+  "commit": {
+    "sha": "6dcb09b5b57875f334f61aebed695e2e4193ffgg",
+    "commit": {
+      "url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193ffgg",
+      "message": "Merge pull request #6 from Spaceghost/patch-1\n\nNew line at end of file."
+    },
+    "url": "https://api.github.com/repos/octocat/Hello-World/commits/7fd1a60b01f91b314f59955a4e4d4e80d8edf11d",
+    "committer": {
+      "gravatar_id": "",
+      "avatar_url": "https://secure.gravatar.com/avatar/7ad39074b0584bc555d0417ae3e7d974?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png",
+      "url": "https://api.github.com/users/octocat",
+      "id": 583231,
+      "login": "octocat"
+    }
+  },
+  "protected": true,
+  "protection_url": "https://api.github.com/repos/octocat/Hello-World/branches/should-change/protection"
+}