Fix attribute value duplication (#71)

lib/phlex_ui/attribute_merger.rb

@@ -1,6 +1,7 @@
 module PhlexUI
   class AttributeMerger
     attr_reader :default_attrs, :user_attrs
+    OVERRIDE_KEY = "!".freeze
 
     def initialize(default_attrs, user_attrs)
       @default_attrs = flatten_hash(default_attrs)
@@ -12,8 +13,8 @@ def initialize(default_attrs, user_attrs)
     # ex: if default_attrs = { class: "text-right" }, user_attrs = { class!: "text-left" }
     # the result will be { class: "text-left }
     def call
-      merged_attrs = merge_hashes(default_attrs, user_attrs)
-      mix(merged_attrs, user_attrs)
+      merged_attrs = merge_hashes(default_attrs, non_override_attrs)
+      mix(merged_attrs, override_attrs)
     end
 
     private
@@ -40,6 +41,18 @@ def mix(*args)
       end
     end
 
+    def override_attrs
+      user_attrs.select do |key, value|
+        key.to_s[-1] == OVERRIDE_KEY
+      end
+    end
+
+    def non_override_attrs
+      user_attrs.reject do |key, value|
+        key.to_s[-1] == OVERRIDE_KEY
+      end
+    end
+
     def flatten_hash(hash, parent_key = "", result_hash = {})
       hash.each do |key, value|
         new_key = parent_key.empty? ? key : :"#{parent_key}_#{key}"

test/phlex_ui/input_test.rb

@@ -10,7 +10,7 @@ def test_render_with_all_items
       PhlexUI.Input(type: "email", placeholder: "Email")
     end
 
-    assert_match(/Email/, output)
+    assert_match(/placeholder="Email"/, output)
   end
 
   def test_no_destructive_classes_when_error_absent