Break up nayyar_spec to respective classes

spec/district_spec.rb

@@ -0,0 +1,113 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Nayyar::District do
+  describe 'class methods' do
+    describe '.all' do
+      it 'should return all districts' do
+        all_districts = described_class.all
+        expect(all_districts.length).to be > 0
+        expect(all_districts.first).to be_a Nayyar::District
+      end
+    end
+
+    describe '.of_state' do
+      let(:state) { Nayyar::State.find_by_pcode 'MMR001' }
+      subject { described_class.of_state state }
+      it 'return a list of districts under given state' do
+        expect(subject.length).to be > 0
+        expect(subject.first).to be_a Nayyar::District
+        subject.each do |district|
+          expect(district.state).to eq(state)
+        end
+      end
+    end
+
+    describe '.find_by' do
+      subject { described_class.find_by pcode: 'MMR001D001' }
+      it { is_expected.to be_a Nayyar::District }
+      it "returns nil if it's not found" do
+        expect(described_class.find_by(pcode: 'MMR001D000')).to be_nil
+      end
+    end
+
+    describe '.find_by!' do
+      subject { described_class.find_by! pcode: 'MMR001D001' }
+      it { is_expected.to be_a Nayyar::District }
+      it "raise error if it's not found" do
+        expect { described_class.find_by! pcode: 'MMR001D000' }.to raise_error Nayyar::DistrictNotFound
+      end
+    end
+
+    let(:valid_queries) { { pcode: 'MMR001D001' } }
+    let(:invalid_queries) { { pcode: 'MMR000D000' } }
+
+    describe '.find_by_**indices**' do
+      it 'returns state when it finds it' do
+        valid_queries.each do |index, query|
+          expect(described_class.send("find_by_#{index}", query)).to be_a Nayyar::District
+        end
+      end
+      it "returns nil when it can't be found" do
+        invalid_queries.each do |index, query|
+          expect(described_class.send("find_by_#{index}", query)).to be_nil
+        end
+      end
+    end
+    describe '.find_by_**indices**!' do
+      it 'returns state when it finds it' do
+        valid_queries.each do |index, query|
+          expect(described_class.send("find_by_#{index}!", query)).to be_a Nayyar::District
+        end
+      end
+      it "raise error when it can't be found" do
+        invalid_queries.each do |index, query|
+          expect { described_class.send("find_by_#{index}!", query) }.to raise_error Nayyar::DistrictNotFound
+        end
+      end
+    end
+  end
+
+  let(:district) do
+    described_class.new(pcode: 'MMR001D001', name: 'Myitkyina', my_name: 'မြစ်ကြီးနား', state: 'MMR001')
+  end
+
+  describe '#initialize' do
+    it 'allows to create a district by providing hash data' do
+      expect(district.data).not_to be nil
+    end
+  end
+  describe 'attributes' do
+    let(:attributes) { %i[pcode name my_name state] }
+    it 'allows its attributes to be accessed by methods' do
+      attributes.each do |method|
+        expect(district).to respond_to method
+      end
+    end
+    it 'allows its attributes to be accessed as keys' do
+      attributes.each do |key|
+        expect(district[key]).not_to be_nil
+      end
+    end
+  end
+
+  describe '#state' do
+    subject { district.state }
+    it { is_expected.to be_a Nayyar::State }
+    it 'expect it to be a correct state' do
+      expect(subject.pcode).to eq('MMR001')
+    end
+  end
+
+  describe '.townships' do
+    subject { district.townships }
+    it 'return a list of districts under given district' do
+      expect(subject.length).to be > 0
+      expect(subject.first).to be_a Nayyar::Township
+      subject.each do |township|
+        expect(township.district.pcode).to eq(district.pcode)
+      end
+    end
+  end
+end