API: fixes a few return codes for project snippets

lib/api/projects.rb

@@ -368,6 +368,10 @@ module Gitlab
       post ":id/snippets" do
         authorize! :write_snippet, user_project
 
+        error!("Title not given", 400) if !params[:title].present?
+        error!("Filename not given", 400) if !params[:file_name].present?
+        error!("Code not given", 400) if !params[:code].present?
+
         attrs = attributes_for_keys [:title, :file_name]
         attrs[:expires_at] = params[:lifetime] if params[:lifetime].present?
         attrs[:content] = params[:code] if params[:code].present?
@@ -415,10 +419,12 @@ module Gitlab
       # Example Request:
       #   DELETE /projects/:id/snippets/:snippet_id
       delete ":id/snippets/:snippet_id" do
+        begin
           @snippet = user_project.snippets.find(params[:snippet_id])
-        authorize! :modify_snippet, @snippet
-
+          authorize! :modify_snippet, user_project
           @snippet.destroy
+        rescue
+        end
       end
 
       # Get a raw project snippet

spec/requests/api/projects_spec.rb

@@ -411,6 +411,18 @@ describe Gitlab::API do
         file_name: 'sample.rb', code: 'test'
       response.status.should == 400
     end
+
+    it "should return a 400 error if file_name not given" do
+      post api("/projects/#{project.id}/snippets", user),
+        title: 'api test', code: 'test'
+      response.status.should == 400
+    end
+
+    it "should return a 400 error if code not given" do
+      post api("/projects/#{project.id}/snippets", user),
+        title: 'api test', file_name: 'sample.rb'
+      response.status.should == 400
+    end
   end
 
   describe "PUT /projects/:id/snippets/:shippet_id" do
@@ -421,6 +433,13 @@ describe Gitlab::API do
       json_response['title'].should == 'example'
       snippet.reload.content.should == 'updated code'
     end
+
+    it "should update an existing project snippet with new title" do
+      put api("/projects/#{project.id}/snippets/#{snippet.id}", user),
+        title: 'other api test'
+      response.status.should == 200
+      json_response['title'].should == 'other api test'
+    end
   end
 
   describe "DELETE /projects/:id/snippets/:snippet_id" do
@@ -428,6 +447,12 @@ describe Gitlab::API do
       expect {
         delete api("/projects/#{project.id}/snippets/#{snippet.id}", user)
       }.to change { Snippet.count }.by(-1)
+      response.status.should == 200
+    end
+
+    it "should return success when deleting unknown snippet id" do
+      delete api("/projects/#{project.id}/snippets/1234", user)
+      response.status.should == 200
     end
   end
 
@@ -436,6 +461,11 @@ describe Gitlab::API do
       get api("/projects/#{project.id}/snippets/#{snippet.id}/raw", user)
       response.status.should == 200
     end
+
+    it "should return a 404 error if raw project snippet not found" do
+      get api("/projects/#{project.id}/snippets/5555/raw", user)
+      response.status.should == 404
+    end
   end
 
   describe "GET /projects/:id/:sha/blob" do