Tests for delete file by API

spec/requests/api/files_spec.rb

@@ -78,4 +78,38 @@ describe API::API do
       response.status.should == 400
     end
   end
+
+  describe "DELETE /projects/:id/repository/files" do
+    let(:valid_params) {
+      {
+        file_path: 'spec/spec_helper.rb',
+        branch_name: 'master',
+        commit_message: 'Changed file'
+      }
+    }
+
+    it "should delete existing file in project repo" do
+      Gitlab::Satellite::DeleteFileAction.any_instance.stub(
+        commit!: true,
+      )
+
+      delete api("/projects/#{project.id}/repository/files", user), valid_params
+      response.status.should == 200
+      json_response['file_path'].should == 'spec/spec_helper.rb'
+    end
+
+    it "should return a 400 bad request if no params given" do
+      delete api("/projects/#{project.id}/repository/files", user)
+      response.status.should == 400
+    end
+
+    it "should return a 400 if satellite fails to create file" do
+      Gitlab::Satellite::DeleteFileAction.any_instance.stub(
+        commit!: false,
+      )
+
+      delete api("/projects/#{project.id}/repository/files", user), valid_params
+      response.status.should == 400
+    end
+  end
 end