Added failing minlength tests to string and text input tests, and to ValidatingUser

test/form_builder/input_field_test.rb

@@ -105,6 +105,12 @@ class InputFieldTest < ActionView::TestCase
     assert_select 'input.string[maxlength="25"]'
   end
 
+  test 'builder input_field uses minlength component' do
+    with_input_field_for @validating_user, :name, as: :string
+
+    assert_select 'input.string[minlength="5"]'
+  end
+
   test 'builder collection input_field generates input tag with a clean HTML' do
     with_input_field_for @user, :status, collection: ['Open', 'Closed'],
       class: 'status', label_method: :to_s, value_method: :to_s

test/inputs/string_input_test.rb

@@ -32,11 +32,21 @@ class StringInputTest < ActionView::TestCase
     assert_select 'input.string[maxlength="25"]'
   end
 
+  test 'input infers minlength column definition from validation when present' do
+    with_input_for @validating_user, :name, :string
+    assert_select 'input.string[minlength="5"]'
+  end
+
   if ActionPack::VERSION::STRING < '5'
     test 'input does not get maxlength from validation when tokenizer present' do
       with_input_for @validating_user, :action, :string
       assert_no_select 'input.string[maxlength]'
     end
+
+    test 'input does not get minlength from validation when tokenizer present' do
+      with_input_for @validating_user, :action, :string
+      assert_no_select 'input.string[minlength]'
+    end
   end
 
   test 'input gets maxlength from validation when :is option present' do
@@ -44,6 +54,11 @@ class StringInputTest < ActionView::TestCase
     assert_select 'input.string[maxlength="12"]'
   end
 
+  test 'input gets minlength from validation when :is option present' do
+    with_input_for @validating_user, :home_picture, :string
+    assert_select 'input.string[minlength="12"]'
+  end
+
   test 'input maxlength is the column limit plus one to make room for decimal point' do
     with_input_for @user, :credit_limit, :string
 

test/inputs/text_input_test.rb

@@ -28,4 +28,9 @@ class TextInputTest < ActionView::TestCase
     with_input_for @validating_user, :description, :text
     assert_select 'textarea.text[maxlength="50"]'
   end
+
+  test 'input infers minlength column definition from validation when present for text attributes' do
+    with_input_for @validating_user, :description, :text
+    assert_select 'textarea.text[minlength="15"]'
+  end
 end

test/support/models.rb

@@ -213,8 +213,8 @@ class ValidatingUser < User
     greater_than_or_equal_to: :min_attempts,
     less_than_or_equal_to: :max_attempts,
     only_integer: true
-  validates_length_of :name, maximum: 25
-  validates_length_of :description, maximum: 50
+  validates_length_of :name, maximum: 25, minimum: 5
+  validates_length_of :description, in: 15..50
   if ActionPack::VERSION::STRING < '5'
     validates_length_of :action, maximum: 10, tokenizer: lambda { |str| str.scan(/\w+/) }
   end

test/test_helper.rb

@@ -55,6 +55,8 @@ class ActionView::TestCase
     @user = User.build(extra_attributes)
 
     @validating_user = ValidatingUser.build({
+      name: 'Tester McTesterson',
+      description: 'A test user of the most distinguised caliber',
       home_picture: 'Home picture',
       age: 19,
       amount: 15,