Merge pull request #557 from SpiffInc/brad/currency-formats

Support formatting excel currencies

lib/roo/excelx/cell/number.rb

@@ -66,6 +66,16 @@ def generate_formatter(format)
           when '##0.0E+0' then '%.1E'
           when "_-* #,##0.00\\ _€_-;\\-* #,##0.00\\ _€_-;_-* \"-\"??\\ _€_-;_-@_-" then number_format('%.2f', '-%.2f')
           when '@' then proc { |number| number }
+          when /^(?:_\()?"([^"]*)"(?:\* )?([^_]+)/
+            proc do |number|
+              formatted_number = generate_formatter($2).call(number)
+              "#{$1}#{formatted_number}"
+            end
+          when /^_[- \(]\[\$([^-]*)[^#@]+([^_]+)/
+            proc do |number|
+              formatted_number = generate_formatter($2).call(number)
+              "#{$1}#{formatted_number}"
+            end
           else
             raise "Unknown format: #{format.inspect}"
           end

spec/lib/roo/excelx_spec.rb

@@ -326,6 +326,30 @@
         expect(subject.formatted_value(4, 1)).to eq '05010'
       end
     end
+
+    context 'contains US currency' do
+      let(:path) { 'test/files/currency-us.xlsx' }
+
+      it 'returns a zero-padded number' do
+        expect(subject.formatted_value(4, 1)).to eq '$20.51'
+      end
+    end
+
+    context 'contains euro currency' do
+      let(:path) { 'test/files/currency-euro.xlsx' }
+
+      it 'returns a zero-padded number' do
+        expect(subject.formatted_value(4, 1)).to eq '€20.51'
+      end
+    end
+
+    context 'contains uk currency' do
+      let(:path) { 'test/files/currency-uk.xlsx' }
+
+      it 'returns a zero-padded number' do
+        expect(subject.formatted_value(4, 1)).to eq '£20.51'
+      end
+    end
   end
 
   describe '#row' do