Include full path of source and target branch names in New Merge Request page

Previous title would only show the group name, which could be confusing.

Closes #2875

2 files changed, 32 insertions, 12 deletions

diff --git a/spec/helpers/merge_requests_helper.rb b/spec/helpers/merge_requests_helper.rb
deleted file mode 100644
index 5262d644048..00000000000
--- a/spec/helpers/merge_requests_helper.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-require 'spec_helper'
-
-describe MergeRequestsHelper do
-  describe :issues_sentence do
-    subject { issues_sentence(issues) }
-    let(:issues) do
-      [build(:issue, iid: 1), build(:issue, iid: 2), build(:issue, iid: 3)]
-    end
-
-    it { is_expected.to eq('#1, #2, and #3') }
-  end
-end
diff --git a/spec/helpers/merge_requests_helper_spec.rb b/spec/helpers/merge_requests_helper_spec.rb
new file mode 100644
index 00000000000..0ef1efb8bce
--- /dev/null
+++ b/spec/helpers/merge_requests_helper_spec.rb
@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+describe MergeRequestsHelper do
+  describe "#issues_sentence" do
+    subject { issues_sentence(issues) }
+    let(:issues) do
+      [build(:issue, iid: 1), build(:issue, iid: 2), build(:issue, iid: 3)]
+    end
+
+    it { is_expected.to eq('#1, #2, and #3') }
+  end
+
+  describe "#format_mr_branch_names" do
+    describe "within the same project" do
+      let(:merge_request) { create(:merge_request) }
+      subject { format_mr_branch_names(merge_request) }
+
+      it { is_expected.to eq([merge_request.source_branch, merge_request.target_branch]) }
+    end
+
+    describe "within different projects" do
+      let(:project) { create(:project) }
+      let(:fork_project) { create(:project, forked_from_project: project) }
+      let(:merge_request) { create(:merge_request, source_project: fork_project, target_project: project) }
+      subject { format_mr_branch_names(merge_request) }
+      let(:source_title) { "#{fork_project.path_with_namespace}:#{merge_request.source_branch}" }
+      let(:target_title) { "#{project.path_with_namespace}:#{merge_request.target_branch}" }
+
+      it { is_expected.to eq([source_title, target_title]) }
+    end
+  end
+end