ACH::StringFormattingHelper - add some specs for more context if the current code needs further work

Author: jm81

spec/ach/string_formatting_helper_spec.rb

@@ -0,0 +1,34 @@
+require 'spec_helper'
+
+describe ACH::StringFormattingHelper do
+  describe '.self.stringify_with_same_day' do
+    subject do
+      ACH::StringFormattingHelper.stringify_with_same_day(value)
+    end
+
+    context 'Date' do
+      let(:value) { Date.new(2022, 10, 15) }
+      it { is_expected.to eq('221015') }
+    end
+
+    context 'Time' do
+      let(:value) { Time.new(2022, 10, 15, 1) }
+      it { is_expected.to eq('221015') }
+    end
+
+    context 'same day value' do
+      let(:value) { 'SD0515' }
+      it { is_expected.to eq('SD0515') }
+    end
+
+    context 'less than 6 characters' do
+      let(:value) { 'short' }
+      it { is_expected.to eq(' short') }
+    end
+
+    context 'more than 6 characters' do
+      let(:value) { 'LONGSTRING' }
+      it { is_expected.to eq('LONGST') }
+    end
+  end
+end