From 55475178a8c0e610103e37027cc0a7a387d72f91 Mon Sep 17 00:00:00 2001
From: Szymon Szukalski <szymon@skas.io>
Date: Thu, 24 Oct 2024 13:28:16 +1100
Subject: Define FamilyTree

- Implemented basic FamilyTree which will hold all the people and perform actions on them
- Updated the FamilyTree Manager to create an instance of the FamilyTree
- Updated the FamilyTreeManager to call the add_child and query_hierarchy methods on the FamilyTree
- Update tests
---
 lib/family_tree.rb               | 15 +++++++++++++++
 lib/family_tree_manager.rb       |  8 +++++---
 spec/family_tree_manager_spec.rb | 14 ++++++++++++--
 spec/family_tree_spec.rb         | 40 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 72 insertions(+), 5 deletions(-)
 create mode 100644 lib/family_tree.rb
 create mode 100644 spec/family_tree_spec.rb

diff --git a/lib/family_tree.rb b/lib/family_tree.rb
new file mode 100644
index 0000000..934d32e
--- /dev/null
+++ b/lib/family_tree.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class FamilyTree
+  def initialize
+    @people = []
+  end
+
+  def add_child(*params)
+    puts "Adding Child with params: #{params.join(', ')}"
+  end
+
+  def query_hierarchy(*params)
+    puts "Querying Hierarcy with params: #{params.join(', ')}"
+  end
+end
diff --git a/lib/family_tree_manager.rb b/lib/family_tree_manager.rb
index 6b0bc12..56ab992 100644
--- a/lib/family_tree_manager.rb
+++ b/lib/family_tree_manager.rb
@@ -2,18 +2,20 @@
 
 require 'singleton'
 
+require_relative 'family_tree'
+
 class FamilyTreeManager
   include Singleton
 
   def initialize
-    @family_members = {}
+    @family_tree = FamilyTree.new
   end
 
   def add_child(*params)
-    puts "Adding Child with params: #{params.join(', ')}"
+    @family_tree.add_child(*params)
   end
 
   def query_hierarchy(*params)
-    puts "Querying Hierarcy with params: #{params.join(', ')}"
+    @family_tree.query_hierarchy(*params)
   end
 end
diff --git a/spec/family_tree_manager_spec.rb b/spec/family_tree_manager_spec.rb
index d3d21f1..a1161ae 100644
--- a/spec/family_tree_manager_spec.rb
+++ b/spec/family_tree_manager_spec.rb
@@ -4,10 +4,15 @@ require_relative '../lib/family_tree_manager'
 
 RSpec.describe FamilyTreeManager do
   let(:family_tree_manager) { FamilyTreeManager.instance }
+  let(:family_tree) { instance_double(FamilyTree) }
+
+  before do
+    family_tree_manager.instance_variable_set(:@family_tree, family_tree)
+  end
 
   describe '#initialize' do
-    it 'initialises the family_members hash' do
-      expect(family_tree_manager.instance_variable_get(:@family_members)).to eq({})
+    it 'creates a family tree' do
+      expect(family_tree_manager.instance_variable_get(:@family_tree)).to eq(family_tree)
     end
   end
 
@@ -15,6 +20,11 @@ RSpec.describe FamilyTreeManager do
     it 'is defined' do
       expect(family_tree_manager).to respond_to(:add_child)
     end
+
+    it 'calls add_child on the family tree' do
+      expect(family_tree).to receive(:add_child).with('Child', 'Mother', 'Father')
+      family_tree_manager.add_child('Child', 'Mother', 'Father')
+    end
   end
 
   describe '#query_hierarchy' do
diff --git a/spec/family_tree_spec.rb b/spec/family_tree_spec.rb
new file mode 100644
index 0000000..2059a89
--- /dev/null
+++ b/spec/family_tree_spec.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require_relative '../lib/family_tree'
+
+RSpec.describe FamilyTree do
+  describe '#initialize' do
+    it 'creates an empty array' do
+      family_tree = FamilyTree.new
+      expect(family_tree.instance_variable_get(:@people)).to eq([])
+    end
+  end
+
+  describe '#add_child' do
+    it 'is defined' do
+      family_tree = FamilyTree.new
+      expect(family_tree).to respond_to(:add_child)
+    end
+
+    it 'prints the params' do
+      family_tree = FamilyTree.new
+      expect do
+        family_tree.add_child('Child', 'Mother', 'Father')
+      end.to output("Adding Child with params: Child, Mother, Father\n").to_stdout
+    end
+  end
+
+  describe '#query_hierarchy' do
+    it 'is defined' do
+      family_tree = FamilyTree.new
+      expect(family_tree).to respond_to(:query_hierarchy)
+    end
+
+    it 'prints the params' do
+      family_tree = FamilyTree.new
+      expect do
+        family_tree.query_hierarchy('Child')
+      end.to output("Querying Hierarcy with params: Child\n").to_stdout
+    end
+  end
+end
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