Add test for url resolver

lib/datadog/core/crashtracking/agent_base_url.rb

@@ -5,6 +5,7 @@
 module Datadog
   module Core
     module Crashtracking
+      # This module provides a method to resolve the base URL of the agent
       module AgentBaseUrl
         module_function
 
@@ -14,8 +15,6 @@ def resolve(agent_settings)
             "#{agent_settings.ssl ? 'https' : 'http'}://#{agent_settings.hostname}:#{agent_settings.port}/"
           when Datadog::Core::Configuration::Ext::Agent::UnixSocket::ADAPTER
             "unix://#{agent_settings.uds_path}"
-          else
-            nil
           end
         end
       end

spec/datadog/core/crashtracking/agent_base_url_spec.rb

@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'datadog/core/crashtracking/agent_base_url'
+
+RSpec.describe Datadog::Core::Crashtracking::AgentBaseUrl do
+  describe '.resolve' do
+    context 'when using HTTP adapter' do
+      context 'when SSL is enabled' do
+        let(:agent_settings) do
+          double(
+            'agent_settings',
+            adapter: Datadog::Core::Configuration::Ext::Agent::HTTP::ADAPTER,
+            ssl: true,
+            hostname: 'example.com',
+            port: 8080
+          )
+        end
+
+        it 'returns the correct base URL' do
+          expect(described_class.resolve(agent_settings)).to eq('https://example.com:8080/')
+        end
+      end
+
+      context 'when SSL is disabled' do
+        let(:agent_settings) do
+          double(
+            'agent_settings',
+            adapter: Datadog::Core::Configuration::Ext::Agent::HTTP::ADAPTER,
+            ssl: false,
+            hostname: 'example.com',
+            port: 8080
+          )
+        end
+
+        it 'returns the correct base URL' do
+          expect(described_class.resolve(agent_settings)).to eq('http://example.com:8080/')
+        end
+      end
+    end
+
+    context 'when using UnixSocket adapter' do
+      let(:agent_settings) do
+        double(
+          'agent_settings',
+          adapter: Datadog::Core::Configuration::Ext::Agent::UnixSocket::ADAPTER,
+          uds_path: '/var/run/datadog.sock'
+        )
+      end
+
+      it 'returns the correct base URL' do
+        expect(described_class.resolve(agent_settings)).to eq('unix:///var/run/datadog.sock')
+      end
+    end
+
+    context 'when using unknownm adapter' do
+      let(:agent_settings) { double('agent_settings', adapter: 'unknown') }
+
+      it 'returns nil' do
+        expect(described_class.resolve(agent_settings)).to be_nil
+      end
+    end
+  end
+end