Add more tests to deposit handling

app/models/deposit.rb

@@ -29,7 +29,7 @@ class Deposit
 
   def amount
     return BigDecimal('0.0') if @amount.blank?
-    BigDecimal(@amount, 10)
+    BigDecimal(@amount.to_s.gsub(/,/, '.'), 10)
   end
 
   def issue_prepayment_invoice

test/models/deposit_test.rb

@@ -40,8 +40,8 @@ class DepositTest < ActiveSupport::TestCase
     @deposit.amount = "12.00"
     assert_equal(BigDecimal.new("12.00"), @deposit.amount)
 
-    @deposit.amount = "12,00"
-    assert_equal(BigDecimal.new("12.00"), @deposit.amount)
+    @deposit.amount = "12,11"
+    assert_equal(BigDecimal.new("12.11"), @deposit.amount)
   end
 
   def test_amount_is_converted_from_float

test/system/registrar_area/invoices/new_test.rb

@@ -29,6 +29,22 @@ class NewInvoiceTest < ApplicationSystemTestCase
     assert_text 'Pay invoice'
   end
 
+  def test_create_new_invoice_with_comma_in_number
+    visit registrar_invoices_path
+    click_link_or_button 'Add deposit'
+    fill_in 'Amount', with: '200,00'
+    fill_in 'Description', with: 'My first invoice'
+
+    assert_difference 'Invoice.count', 1 do
+      click_link_or_button 'Add'
+    end
+
+    assert_text 'Please pay the following invoice'
+    assert_text 'Invoice no. 131050'
+    assert_text 'Subtotal 200,00 €'
+    assert_text 'Pay invoice'
+  end
+
   def test_create_new_invoice_fails_when_amount_is_0
     visit registrar_invoices_path
     click_link_or_button 'Add deposit'
@@ -41,4 +57,17 @@ class NewInvoiceTest < ApplicationSystemTestCase
 
     assert_text 'Amount is too small. Minimum deposit is 0.01 EUR'
   end
+
+  def test_create_new_invoice_fails_when_amount_is_negative
+    visit registrar_invoices_path
+    click_link_or_button 'Add deposit'
+    fill_in 'Amount', with: '-120.00'
+    fill_in 'Description', with: 'My first invoice'
+
+    assert_no_difference 'Invoice.count' do
+      click_link_or_button 'Add'
+    end
+
+    assert_text 'Amount is too small. Minimum deposit is 0.01 EUR'
+  end
 end