set proglang based on exenv

try to guess exenv based on proglang

spec/services/proforma_service/convert_exercise_to_task_spec.rb

@@ -19,22 +19,19 @@ RSpec.describe ProformaService::ConvertExerciseToTask do
     let(:convert_to_task) { described_class.new(exercise: exercise) }
     let(:exercise) do
       create(:dummy,
+        execution_environment: execution_environment,
         instructions: 'instruction',
         uuid: SecureRandom.uuid,
         files: files + tests)
     end
     let(:files) { [] }
     let(:tests) { [] }
+    let(:execution_environment) { create(:java) }
 
     it 'creates a task with all basic attributes' do
       expect(task).to have_attributes(
         title: exercise.title,
         description: exercise.description,
-        # internal_description: exercise.instructions,
-        # proglang: {
-        #   name: exercise.execution_environment.language,
-        #   version: exercise.execution_environment.version
-        # },
         uuid: exercise.uuid,
         language: described_class::DEFAULT_LANGUAGE,
         meta_data: {
@@ -48,13 +45,18 @@ RSpec.describe ProformaService::ConvertExerciseToTask do
             files: {},
           },
         },
-        # parent_uuid: exercise.clone_relations.first&.origin&.uuid,
         files: [],
         tests: [],
         model_solutions: []
       )
     end
 
+    context 'when exercise has execution_environment with correct docker-image name' do
+      it 'creates a task with the correct proglang attribute' do
+        expect(task).to have_attributes(proglang: {name: 'java', version: '8'})
+      end
+    end
+
     context 'when exercise has a mainfile' do
       let(:files) { [file] }
       let(:file) { build(:file) }

spec/services/proforma_service/convert_task_to_exercise_spec.rb

@@ -32,7 +32,7 @@ describe ProformaService::ConvertTaskToExercise do
       Proforma::Task.new(
         title: 'title',
         description: 'description',
-        # proglang: {name: 'proglang-name', version: 'proglang-version'},
+        proglang: {name: 'python', version: '3.4'},
         uuid: 'uuid',
         parent_uuid: 'parent_uuid',
         language: 'language',
@@ -57,7 +57,7 @@ describe ProformaService::ConvertTaskToExercise do
           allow_file_creation: allow_file_creation,
           allow_auto_completion: allow_auto_completion,
           expected_difficulty: expected_difficulty,
-          execution_environment_id: execution_environment.id,
+          execution_environment_id: execution_environment&.id,
           files: files_meta_data,
         },
       }
@@ -87,6 +87,16 @@ describe ProformaService::ConvertTaskToExercise do
       )
     end
 
+    context 'when execution environment is not set in meta_data' do
+      let(:execution_environment) { nil }
+
+      before { create(:python) }
+
+      it 'sets the execution_environment based on proglang name and value' do
+        expect(convert_to_exercise_service).to have_attributes(execution_environment: have_attributes(name: 'Python 3.4'))
+      end
+    end
+
     context 'when task has a file' do
       let(:files) { [file] }
       let(:file) do