add tests with buttons

Author: walterdavis

test/bootstrap_form_group_test.rb

@@ -221,6 +221,25 @@ class BootstrapFormGroupTest < ActionView::TestCase
     assert_equivalent_html expected, @builder.file_field(:avatar, append: "after")
   end
 
+  test "file field with append and prepend button" do
+    prefix = '<div class="mb-3"><label class="form-label" for="user_avatar">Avatar</label><div class="input-group">'
+    field = <<~HTML
+      <input class="form-control" id="user_avatar" name="user[avatar]" type="file" />
+    HTML
+    button_src = link_to("Click", "#", class: "btn btn-secondary")
+    button_prepend = button_src
+    button_append = button_src
+    suffix = "</div></div>"
+    after_button = prefix + field + button_append + suffix
+    before_button = prefix + button_prepend + field + suffix
+    both_button = prefix + button_prepend + field + button_append + suffix
+    multiple_button = prefix + button_prepend + button_prepend + field + button_append + button_append + suffix
+    assert_equivalent_html after_button, @builder.file_field(:avatar, append: button_src)
+    assert_equivalent_html before_button, @builder.file_field(:avatar, prepend: button_src)
+    assert_equivalent_html both_button, @builder.file_field(:avatar, append: button_src, prepend: button_src)
+    assert_equivalent_html multiple_button, @builder.file_field(:avatar, append: [button_src] * 2, prepend: [button_src] * 2)
+  end
+
   test "help messages for default forms" do
     expected = <<~HTML
       <div class="mb-3">