Add comprehensive unit tests for main Hooks module and Core::ConfigLoader

Co-authored-by: GrantBirki <[email protected]>

Author: Copilot

spec/unit/hooks_spec.rb

@@ -1,3 +1,59 @@
 # frozen_string_literal: true
 
 require_relative "spec_helper"
+
+describe Hooks do
+  describe ".build" do
+    context "with default parameters" do
+      it "creates a builder and builds the application" do
+        allow(Hooks::Core::Builder).to receive(:new).and_call_original
+        allow_any_instance_of(Hooks::Core::Builder).to receive(:build).and_return("mock_app")
+
+        result = Hooks.build
+
+        expect(Hooks::Core::Builder).to have_received(:new).with(config: nil, log: nil)
+        expect(result).to eq("mock_app")
+      end
+    end
+
+    context "with custom config" do
+      it "passes config to builder" do
+        config_hash = { log_level: "debug" }
+        allow(Hooks::Core::Builder).to receive(:new).and_call_original
+        allow_any_instance_of(Hooks::Core::Builder).to receive(:build).and_return("mock_app")
+
+        result = Hooks.build(config: config_hash)
+
+        expect(Hooks::Core::Builder).to have_received(:new).with(config: config_hash, log: nil)
+        expect(result).to eq("mock_app")
+      end
+    end
+
+    context "with custom logger" do
+      it "passes logger to builder" do
+        custom_logger = double("Logger")
+        allow(Hooks::Core::Builder).to receive(:new).and_call_original
+        allow_any_instance_of(Hooks::Core::Builder).to receive(:build).and_return("mock_app")
+
+        result = Hooks.build(log: custom_logger)
+
+        expect(Hooks::Core::Builder).to have_received(:new).with(config: nil, log: custom_logger)
+        expect(result).to eq("mock_app")
+      end
+    end
+
+    context "with both config and logger" do
+      it "passes both to builder" do
+        config_hash = { environment: "test" }
+        custom_logger = double("Logger")
+        allow(Hooks::Core::Builder).to receive(:new).and_call_original
+        allow_any_instance_of(Hooks::Core::Builder).to receive(:build).and_return("mock_app")
+
+        result = Hooks.build(config: config_hash, log: custom_logger)
+
+        expect(Hooks::Core::Builder).to have_received(:new).with(config: config_hash, log: custom_logger)
+        expect(result).to eq("mock_app")
+      end
+    end
+  end
+end