Add discovery tests.

lib/simple_form/form_builder.rb

@@ -349,8 +349,7 @@ module SimpleForm
     def mapping_override(klass) #:nodoc:
       name = klass.name
       if name =~ /^SimpleForm::Inputs/
-        attempt = "#{name.split("::").last}Input"
-        attempt_mapping attempt, Object
+        attempt_mapping name.split("::").last, Object
       end
     end
 

test/discovery_inputs.rb

@@ -0,0 +1,21 @@
+class StringInput < SimpleForm::Inputs::StringInput
+  def input
+    "<section>#{super}</section>".html_safe
+  end
+end
+
+class NumericInput < SimpleForm::Inputs::NumericInput
+  def input
+    "<section>#{super}</section>".html_safe
+  end
+end
+
+class CustomizedInput < SimpleForm::Inputs::StringInput
+  def input
+    "<section>#{super}</section>".html_safe
+  end
+  
+  def input_method
+    :text_field
+  end
+end

test/form_builder_test.rb

@@ -681,4 +681,63 @@ class FormBuilderTest < ActionView::TestCase
       assert_nil user.class.mappings[:custom_type]
     end
   end
+
+  # DISCOVERY
+  # Setup new inputs and remove them after the test.
+  def discovery(value=false)
+    swap SimpleForm, :cache_discovery => value do
+      begin
+        load "discovery_inputs.rb"
+        yield
+      ensure
+        SimpleForm::FormBuilder.discovery_cache.clear
+        Object.send :remove_const, :StringInput
+        Object.send :remove_const, :NumericInput
+        Object.send :remove_const, :CustomizedInput
+      end
+    end
+  end
+
+  test 'builder should not discover new inputs if cached' do
+    with_form_for @user, :name
+    assert_select 'form input#user_name.string'
+
+    discovery(true) do
+      with_form_for @user, :name
+      assert_no_select 'form section input#user_name.string'
+    end
+  end
+
+  test 'builder should discover new inputs' do
+    discovery do
+      with_form_for @user, :name, :as => :customized
+      assert_select 'form section input#user_name.string'
+    end
+  end
+
+  test 'builder should not discover new inputs if discovery is off' do
+    with_form_for @user, :name
+    assert_select 'form input#user_name.string'
+
+    swap SimpleForm, :inputs_discovery => false do
+      discovery do
+        with_form_for @user, :name
+        assert_no_select 'form section input#user_name.string'
+      end
+    end
+  end
+
+  test 'builder should discover new inputs from mappings if not cached' do
+    discovery do
+      with_form_for @user, :name
+      assert_select 'form section input#user_name.string'
+    end
+  end
+
+  test 'builder should discover new inputs from internal fallbacks if not cached' do
+    discovery do
+      with_form_for @user, :age
+      assert_select 'form section input#user_age.numeric.integer'
+    end
+  end
 end