Improve test coverage from 80.68% to 85.42% and add comprehensive unit tests

.gitignore

@@ -5,6 +5,7 @@ tmp/
 spec/integration/tmp/
 tarballs/
 vendor/gems/
+vendor/bundle/
 .idea
 .byebug_history
 .local/

spec/unit/lib/hooks/app/endpoints/health_spec.rb

@@ -0,0 +1,77 @@
+# frozen_string_literal: true
+
+require "rack/test"
+
+describe Hooks::App::HealthEndpoint do
+  include Rack::Test::Methods
+
+  def app
+    described_class
+  end
+
+  before do
+    # Mock API start_time for consistent uptime calculation
+    allow(Hooks::App::API).to receive(:start_time).and_return(Time.parse("2024-12-31T23:59:00Z"))
+  end
+
+  describe "GET /" do
+    it "returns health status as JSON" do
+      get "/"
+
+      expect(last_response.status).to eq(200)
+      expect(last_response.headers["Content-Type"]).to include("application/json")
+    end
+
+    it "includes health status in response" do
+      get "/"
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data["status"]).to eq("healthy")
+    end
+
+    it "includes timestamp in ISO8601 format" do
+      get "/"
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data["timestamp"]).to eq(TIME_MOCK)
+    end
+
+    it "includes version information" do
+      get "/"
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data["version"]).to eq(Hooks::VERSION)
+    end
+
+    it "includes uptime in seconds" do
+      get "/"
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data["uptime_seconds"]).to be_a(Integer)
+      expect(response_data["uptime_seconds"]).to eq(60) # 1 minute difference
+    end
+
+    it "returns valid JSON structure" do
+      get "/"
+
+      expect { JSON.parse(last_response.body) }.not_to raise_error
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data).to have_key("status")
+      expect(response_data).to have_key("timestamp")
+      expect(response_data).to have_key("version")
+      expect(response_data).to have_key("uptime_seconds")
+    end
+
+    it "calculates uptime correctly" do
+      # Test with different start time
+      different_start = Time.parse("2024-12-31T23:58:30Z")
+      allow(Hooks::App::API).to receive(:start_time).and_return(different_start)
+
+      get "/"
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data["uptime_seconds"]).to eq(90) # 1.5 minutes difference
+    end
+  end
+end

spec/unit/lib/hooks/app/endpoints/version_spec.rb

@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+require "rack/test"
+
+describe Hooks::App::VersionEndpoint do
+  include Rack::Test::Methods
+
+  def app
+    described_class
+  end
+
+  describe "GET /" do
+    it "returns version information as JSON" do
+      get "/"
+
+      expect(last_response.status).to eq(200)
+      expect(last_response.headers["Content-Type"]).to include("application/json")
+    end
+
+    it "includes version number in response" do
+      get "/"
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data["version"]).to eq(Hooks::VERSION)
+    end
+
+    it "includes timestamp in ISO8601 format" do
+      get "/"
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data["timestamp"]).to eq(TIME_MOCK)
+    end
+
+    it "returns valid JSON structure" do
+      get "/"
+
+      expect { JSON.parse(last_response.body) }.not_to raise_error
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data).to have_key("version")
+      expect(response_data).to have_key("timestamp")
+    end
+
+    it "version matches expected format" do
+      get "/"
+
+      response_data = JSON.parse(last_response.body)
+      expect(response_data["version"]).to match(/^\d+\.\d+\.\d+$/)
+    end
+  end
+end