add unit tests

services/web/test/unit/coffee/Editor/EditorControllerTests.coffee

@@ -32,6 +32,7 @@ describe "EditorController", ->
 			'../Project/ProjectEntityUpdateHandler' : @ProjectEntityUpdateHandler = {}
 			'../Project/ProjectOptionsHandler' : @ProjectOptionsHandler =
 				setCompiler: sinon.stub().yields()
+				setImageName: sinon.stub().yields()
 				setSpellCheckLanguage: sinon.stub().yields()
 			'../Project/ProjectDetailsHandler': @ProjectDetailsHandler =
 				setProjectDescription: sinon.stub().yields()
@@ -377,6 +378,19 @@ describe "EditorController", ->
 				.calledWith(@project_id, "compilerUpdated", @compiler)
 				.should.equal true
 
+	describe "setImageName", ->
+		beforeEach ->
+			@imageName = "texlive-1234.5"
+			@EditorController.setImageName @project_id, @imageName, @callback
+
+		it "should send the new imageName and project id to the project options handler", ->
+			@ProjectOptionsHandler.setImageName
+				.calledWith(@project_id, @imageName)
+				.should.equal true
+			@EditorRealTimeController.emitToRoom
+				.calledWith(@project_id, "imageNameUpdated", @imageName)
+				.should.equal true
+
 	describe "setSpellCheckLanguage", ->
 		beforeEach ->
 			@languageCode = "fr"

services/web/test/unit/coffee/Project/ProjectControllerTests.coffee

@@ -145,6 +145,18 @@ describe "ProjectController", ->
 				done()
 			@ProjectController.updateProjectSettings @req, @res
 
+		it "should update the imageName", (done) ->
+			@EditorController.setImageName = sinon.stub().callsArg(2)
+			@req.body =
+				imageName: @imageName = "texlive-1234.5"
+			@res.sendStatus = (code) =>
+				@EditorController.setImageName
+					.calledWith(@project_id, @imageName)
+					.should.equal true
+				code.should.equal 204
+				done()
+			@ProjectController.updateProjectSettings @req, @res
+
 		it "should update the spell check language", (done) ->
 			@EditorController.setSpellCheckLanguage = sinon.stub().callsArg(2)
 			@req.body =

services/web/test/unit/coffee/Project/ProjectOptionsHandlerTests.coffee

@@ -19,6 +19,11 @@ describe 'creating a project', ->
 					{name: "English", code: "en"}
 					{name: "French", code: "fr"}
 				]
+				imageRoot: "docker-repo/subdir"
+				allowedImageNames: [
+					{imageName: "texlive-0000.0", imageDesc: "test image 0"}
+					{imageName: "texlive-1234.5", imageDesc: "test image 1"}
+				]
 			'logger-sharelatex':
 				log:->
 				err:->
@@ -37,6 +42,19 @@ describe 'creating a project', ->
 				@projectModel.update.called.should.equal false
 				done()
 
+	describe 'Setting the imageName', ->
+		it 'should perform and update on mongo', (done)->
+			@handler.setImageName project_id, "texlive-1234.5", (err)=>
+				args = @projectModel.update.args[0]
+				args[0]._id.should.equal project_id
+				args[1].imageName.should.equal "docker-repo/subdir/texlive-1234.5"
+				done()
+			@projectModel.update.args[0][3]()
+
+		it 'should not perform and update on mongo if it is not a reconised compiler', (done)->
+			@handler.setImageName project_id, "something", (err)=>
+				@projectModel.update.called.should.equal false
+				done()
 
 	describe "setting the spellCheckLanguage", ->