diff --git a/spec/services/course/assessment/question/codaveri_problem_generation_service_spec.rb b/spec/services/course/assessment/question/codaveri_problem_generation_service_spec.rb
new file mode 100644
index 00000000000..e966bd25eda
--- /dev/null
+++ b/spec/services/course/assessment/question/codaveri_problem_generation_service_spec.rb
@@ -0,0 +1,111 @@
+# frozen_string_literal: true
+require 'rails_helper'
+
+RSpec.describe Course::Assessment::Question::CodaveriProblemGenerationService do
+  let!(:instance) { Instance.default }
+  with_tenant(:instance) do
+    let(:user) { create(:administrator) }
+    let(:course) { create(:course, creator: user) }
+    let(:assessment) { create(:assessment, course: course, creator: user) }
+    let(:params) do
+      {
+        custom_prompt: 'This is a custom prompt.',
+        is_default_question_form_data: 'false',
+        title: 'Absolute Value',
+        description: 'Given a number n, return its absolute value',
+        template: 'def absolute(n): pass',
+        solution: '',
+        public_test_cases: '{
+          "0": {"hint": "Positive number", "expression": "absolute(1)", "expected": "1"},
+          "1": {"hint": "Negative number", "expression": "absolute(-2)", "expected": "2"}
+        }',
+        private_test_cases: '{
+          "0": {"hint": "Zero number", "expression": "absolute(0)", "expected": "0"}
+        }',
+        evaluation_test_cases: '{
+          "0": {"hint": "Any number", "expression": "absolute(0.5)", "expected": "0.5"}
+        }'
+      }
+    end
+    let(:language) { 'python' }
+    let(:version) { '3.12' }
+
+    subject { described_class.new(assessment, params, language, version) }
+
+    describe '#initialize' do
+      before { described_class.new(assessment, params, language, version) }
+      context 'when initializing with problem details' do
+        it 'sets the problem title and description correctly' do
+          payload = subject.instance_variable_get(:@payload)
+          expect(payload[:problem][:title]).to eq('Absolute Value')
+          expect(payload[:problem][:description]).to eq('Given a number n, return its absolute value')
+        end
+
+        it 'sets the template content correctly' do
+          payload = subject.instance_variable_get(:@payload)
+          expect(payload[:problem][:templates].first[:path]).to eq('main.py')
+          expect(payload[:problem][:templates].first[:content]).to eq('def absolute(n): pass')
+        end
+
+        it 'initializes solution as an empty string' do
+          payload = subject.instance_variable_get(:@payload)
+          expect(payload[:problem][:solutions].first[:tag]).to eq('solution')
+          expect(payload[:problem][:solutions].first[:files].first[:path]).to eq('main.py')
+          expect(payload[:problem][:solutions].first[:files].first[:content]).to eq('')
+        end
+      end
+
+      context 'when appending test cases' do
+        it 'appends public test cases to exprTestcases' do
+          payload = subject.instance_variable_get(:@payload)
+          public_test_cases = payload[:problem][:exprTestcases].select { |tc| tc[:visibility] == 'public' }
+
+          expect(public_test_cases.size).to eq(2)
+          expect(public_test_cases[0]).to include(
+            hint: 'Positive number',
+            lhsExpression: 'absolute(1)',
+            rhsExpression: '1',
+            display: 'absolute(1)'
+          )
+          expect(public_test_cases[1]).to include(
+            hint: 'Negative number',
+            lhsExpression: 'absolute(-2)',
+            rhsExpression: '2',
+            display: 'absolute(-2)'
+          )
+        end
+
+        it 'appends private test cases to exprTestcases' do
+          payload = subject.instance_variable_get(:@payload)
+          private_test_case = payload[:problem][:exprTestcases].find { |tc| tc[:visibility] == 'private' }
+
+          expect(private_test_case).to include(
+            hint: 'Zero number',
+            lhsExpression: 'absolute(0)',
+            rhsExpression: '0',
+            display: 'absolute(0)'
+          )
+        end
+
+        it 'appends hidden (evaluation) test cases to exprTestcases' do
+          payload = subject.instance_variable_get(:@payload)
+          hidden_test_case = payload[:problem][:exprTestcases].find { |tc| tc[:visibility] == 'hidden' }
+
+          expect(hidden_test_case).to include(
+            hint: 'Any number',
+            lhsExpression: 'absolute(0.5)',
+            rhsExpression: '0.5',
+            display: 'absolute(0.5)'
+          )
+        end
+
+        it 'assigns incremental indices to exprTestcases' do
+          payload = subject.instance_variable_get(:@payload)
+          indices = payload[:problem][:exprTestcases].map { |tc| tc[:index] }
+
+          expect(indices).to eq([1, 2, 3, 4]) # Ensuring the indices are assigned incrementally
+        end
+      end
+    end
+  end
+end