From 8d16abb3f57336af73b91e3e4b387f4936a8084d Mon Sep 17 00:00:00 2001
From: Szymon Szukalski <szymon@skas.io>
Date: Thu, 24 Oct 2024 12:36:22 +1100
Subject: Implement minimal FamilyTreeManager and tests

---
 lib/family_tree_manager.rb       | 14 ++++++++++++++
 spec/family_tree_manager_spec.rb | 25 +++++++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 lib/family_tree_manager.rb
 create mode 100644 spec/family_tree_manager_spec.rb

diff --git a/lib/family_tree_manager.rb b/lib/family_tree_manager.rb
new file mode 100644
index 0000000..75e1b05
--- /dev/null
+++ b/lib/family_tree_manager.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'singleton'
+
+class FamilyTreeManager
+  include Singleton
+
+  def initialize
+    @family_members = {}
+  end
+
+  def add_child(*params); end
+  def query_hierarchy(*params); end
+end
diff --git a/spec/family_tree_manager_spec.rb b/spec/family_tree_manager_spec.rb
new file mode 100644
index 0000000..d3d21f1
--- /dev/null
+++ b/spec/family_tree_manager_spec.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require_relative '../lib/family_tree_manager'
+
+RSpec.describe FamilyTreeManager do
+  let(:family_tree_manager) { FamilyTreeManager.instance }
+
+  describe '#initialize' do
+    it 'initialises the family_members hash' do
+      expect(family_tree_manager.instance_variable_get(:@family_members)).to eq({})
+    end
+  end
+
+  describe '#add_child' do
+    it 'is defined' do
+      expect(family_tree_manager).to respond_to(:add_child)
+    end
+  end
+
+  describe '#query_hierarchy' do
+    it 'is defined' do
+      expect(family_tree_manager).to respond_to(:query_hierarchy)
+    end
+  end
+end
-- 
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