Add badge template class to use with SVG ERB template

lib/gitlab/badge/build/template.rb

+module Gitlab
+  module Badge
+    class Build
+      ##
+      # Abstract class for build badge template.
+      #
+      # Template object will be passed to badge.svg.erb template.
+      #
+      class Template
+        STATUS_COLOR = {
+          success: '#4c1',
+          failed: '#e05d44',
+          running: '#dfb317',
+          pending: '#dfb317',
+          canceled: '#9f9f9f',
+          skipped: '#9f9f9f',
+          unknown: '#9f9f9f'
+        }
+
+        def initialize(status)
+          @status = status
+        end
+
+        def key_text
+          'build'
+        end
+
+        def value_text
+          @status
+        end
+
+        def key_width
+          38
+        end
+
+        def value_width
+          54
+        end
+
+        def key_color
+          '#555'
+        end
+
+        def value_color
+          STATUS_COLOR[@status.to_sym] ||
+            STATUS_COLOR[:unknown]
+        end
+
+        def key_text_anchor
+          key_width / 2
+        end
+
+        def value_text_anchor
+          key_width + (value_width / 2)
+        end
+
+        def width
+          key_width + value_width
+        end
+      end
+    end
+  end
+end

spec/lib/gitlab/badge/build/template_spec.rb

+require 'spec_helper'
+
+describe Gitlab::Badge::Build::Template do
+  let(:status) { 'success' }
+  let(:template) { described_class.new(status) }
+
+  describe '#key_text' do
+    it 'is always says build' do
+      expect(template.key_text).to eq 'build'
+    end
+  end
+
+  describe '#value_text' do
+    it 'is status value' do
+      expect(template.value_text).to eq 'success'
+    end
+  end
+
+  describe 'widths and text anchors' do
+    it 'has fixed width and text anchors' do
+      expect(template.width).to eq 92
+      expect(template.key_width).to eq 38
+      expect(template.value_width).to eq 54
+      expect(template.key_text_anchor).to eq 19
+      expect(template.value_text_anchor).to eq 65
+    end
+  end
+
+  describe '#key_color' do
+    it 'is always the same' do
+      expect(template.key_color).to eq '#555'
+    end
+  end
+
+  describe '#value_color' do
+    context 'when status is success' do
+      let(:status) { 'success' }
+
+      it 'has expected color' do
+        expect(template.value_color).to eq '#4c1'
+      end
+    end
+
+    context 'when status is failed' do
+      let(:status) { 'failed' }
+
+      it 'has expected color' do
+        expect(template.value_color).to eq '#e05d44'
+      end
+    end
+
+    context 'when status is running' do
+      let(:status) { 'running' }
+
+      it 'has expected color' do
+        expect(template.value_color).to eq '#dfb317'
+      end
+    end
+
+    context 'when status is unknown' do
+      let(:status) { 'unknown' }
+
+      it 'has expected color' do
+        expect(template.value_color).to eq '#9f9f9f'
+      end
+    end
+
+    context 'when status does not match any known statuses' do
+      let(:status) { 'invalid status' }
+
+      it 'has expected color' do
+        expect(template.value_color).to eq '#9f9f9f'
+      end
+    end
+  end
+end