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From 5f33f8147fc9d84e69a33758b000486ebe42c8ae Mon Sep 17 00:00:00 2001
From: Sergey Novik <konnigun@gmail.com>
Date: Sun, 19 Jul 2015 18:11:07 +0300
Subject: [PATCH 1/3] Add specs for attributes comparison (based on latest
 Equalizer gem working version)

---
 spec/unit/virtus/attribute/comparison_spec.rb | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 spec/unit/virtus/attribute/comparison_spec.rb

diff --git a/spec/unit/virtus/attribute/comparison_spec.rb b/spec/unit/virtus/attribute/comparison_spec.rb
new file mode 100644
index 0000000..0b51a9c
--- /dev/null
+++ b/spec/unit/virtus/attribute/comparison_spec.rb
@@ -0,0 +1,23 @@
+require 'spec_helper'
+
+describe Virtus::Attribute, '#== (defined by including Virtus::Equalizer)' do
+  let(:attribute) { described_class.build(String, :name => :name) }
+
+  # Currently that's the way it works and it happens because default_value objects
+  # don't have equalizer, resulting in  attributes object mismatch.
+  # This behavior (and a spec) will need a change in future.
+  it 'returns false when attributes have same type and options' do
+    equal_attribute = described_class.build(String, :name => :name)
+    expect(attribute == equal_attribute).to be_falsey
+  end
+
+  it 'returns false when attributes have different type' do
+    different_attribute = described_class.build(Integer, :name => :name)
+    expect(attribute == different_attribute).to be_falsey
+  end
+
+  it 'returns false when attributes have different options' do
+    different_attribute = described_class.build(Integer, :name => :name_two)
+    expect(attribute == different_attribute).to be_falsey
+  end
+end

From 3748f6eb2cf368d6a78fb1ef50c2724648d96a9b Mon Sep 17 00:00:00 2001
From: Sergey Novik <konnigun@gmail.com>
Date: Sun, 19 Jul 2015 18:11:24 +0300
Subject: [PATCH 2/3] Use Virtus::Equalizer instead of Equalizer gem in
 Virtus#Attribute (behavior preserved)

---
 lib/virtus/attribute.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/virtus/attribute.rb b/lib/virtus/attribute.rb
index 999a2ef..0654d4d 100644
--- a/lib/virtus/attribute.rb
+++ b/lib/virtus/attribute.rb
@@ -18,7 +18,7 @@ module Virtus
   class Attribute
     extend DescendantsTracker, Options, TypeLookup
 
-    include ::Equalizer.new(:type, :options)
+    include Equalizer.new(inspect) << :type << :options
 
     accept_options :primitive, :accessor, :default, :lazy, :strict, :required, :finalize, :nullify_blank
 

From ef57af319334a1d4f3e0860acbde7c6d6f0eb8ef Mon Sep 17 00:00:00 2001
From: Sergey Novik <konnigun@gmail.com>
Date: Sun, 19 Jul 2015 18:26:50 +0300
Subject: [PATCH 3/3] Change behavior of Attribute#== method

By changing Coercer#== and DefaultValue#== methods, we allow
Attribute#== to actually compare objects now (before, every comparison
would return `false` because of different instances of DefaultValue
model in options[:default_value] key.
---
 lib/virtus/attribute/default_value.rb              |  2 ++
 lib/virtus/coercer.rb                              |  1 +
 spec/unit/virtus/attribute/comparison_spec.rb      |  7 ++-----
 spec/unit/virtus/attribute_set/append_spec.rb      |  8 ++++----
 spec/unit/virtus/attribute_set/element_set_spec.rb | 22 +++++++++++++++-------
 spec/unit/virtus/attribute_set/merge_spec.rb       |  8 +++++---
 6 files changed, 29 insertions(+), 19 deletions(-)

diff --git a/lib/virtus/attribute/default_value.rb b/lib/virtus/attribute/default_value.rb
index a2fcd31..eca7350 100644
--- a/lib/virtus/attribute/default_value.rb
+++ b/lib/virtus/attribute/default_value.rb
@@ -7,6 +7,8 @@ class Attribute
     class DefaultValue
       extend DescendantsTracker
 
+      include Equalizer.new(inspect) << :value
+
       # Builds a default value instance
       #
       # @return [Virtus::Attribute::DefaultValue]
diff --git a/lib/virtus/coercer.rb b/lib/virtus/coercer.rb
index a06e273..676d553 100644
--- a/lib/virtus/coercer.rb
+++ b/lib/virtus/coercer.rb
@@ -3,6 +3,7 @@ module Virtus
   # Abstract coercer class
   #
   class Coercer
+    include Equalizer.new(inspect) << :primitive << :type
 
     # @api private
     attr_reader :primitive, :type
diff --git a/spec/unit/virtus/attribute/comparison_spec.rb b/spec/unit/virtus/attribute/comparison_spec.rb
index 0b51a9c..796cd20 100644
--- a/spec/unit/virtus/attribute/comparison_spec.rb
+++ b/spec/unit/virtus/attribute/comparison_spec.rb
@@ -3,12 +3,9 @@
 describe Virtus::Attribute, '#== (defined by including Virtus::Equalizer)' do
   let(:attribute) { described_class.build(String, :name => :name) }
 
-  # Currently that's the way it works and it happens because default_value objects
-  # don't have equalizer, resulting in  attributes object mismatch.
-  # This behavior (and a spec) will need a change in future.
-  it 'returns false when attributes have same type and options' do
+  it 'returns true when attributes have same type and options' do
     equal_attribute = described_class.build(String, :name => :name)
-    expect(attribute == equal_attribute).to be_falsey
+    expect(attribute == equal_attribute).to be_truthy
   end
 
   it 'returns false when attributes have different type' do
diff --git a/spec/unit/virtus/attribute_set/append_spec.rb b/spec/unit/virtus/attribute_set/append_spec.rb
index 7fbb20a..577b07e 100644
--- a/spec/unit/virtus/attribute_set/append_spec.rb
+++ b/spec/unit/virtus/attribute_set/append_spec.rb
@@ -38,10 +38,10 @@
 
     it { is_expected.to equal(object) }
 
-    it 'replaces the original attribute' do
-      expect { subject }.to change { object.to_a }.
-        from(attributes).
-        to([ attribute ])
+    it "replaces the original attribute object" do
+      expect { subject }.to change { object.to_a.map(&:__id__) }.
+      from(attributes.map(&:__id__)).
+      to([attribute.__id__])
     end
   end
 end
diff --git a/spec/unit/virtus/attribute_set/element_set_spec.rb b/spec/unit/virtus/attribute_set/element_set_spec.rb
index 5db7e41..8d9c638 100644
--- a/spec/unit/virtus/attribute_set/element_set_spec.rb
+++ b/spec/unit/virtus/attribute_set/element_set_spec.rb
@@ -37,20 +37,28 @@
 
     it { is_expected.to equal(attribute) }
 
-    it 'replaces the original attribute' do
-      expect { subject }.to change { object.to_a }.from(attributes).to([ attribute ])
+    it "replaces the original attribute object" do
+      expect { subject }.to change { object.to_a.map(&:__id__) }.
+      from(attributes.map(&:__id__)).
+      to([attribute.__id__])
     end
 
-    it 'allows #[] to access the attribute with a symbol' do
-      expect { subject }.to change { object['name'] }.from(original).to(attribute)
+    it 'allows #[] to access the attribute with a string' do
+      expect { subject }.to change { object['name'].__id__ }.
+      from(original.__id__).
+      to(attribute.__id__)
     end
 
-    it 'allows #[] to access the attribute with a string' do
-      expect { subject }.to change { object[:name] }.from(original).to(attribute)
+    it 'allows #[] to access the attribute with a symbol' do
+      expect { subject }.to change { object[:name].__id__ }.
+      from(original.__id__).
+      to(attribute.__id__)
     end
 
     it 'allows #reset to track overridden attributes' do
-      expect { subject }.to change { object.reset.to_a }.from(attributes).to([ attribute ])
+      expect { subject }.to change { object.reset.to_a.map(&:__id__) }.
+      from(attributes.map(&:__id__)).
+      to([attribute.__id__])
     end
   end
 end
diff --git a/spec/unit/virtus/attribute_set/merge_spec.rb b/spec/unit/virtus/attribute_set/merge_spec.rb
index 72dc39c..9981ece 100644
--- a/spec/unit/virtus/attribute_set/merge_spec.rb
+++ b/spec/unit/virtus/attribute_set/merge_spec.rb
@@ -21,12 +21,14 @@
 
   context 'with a duplicate attribute' do
     let(:attributes) { [Virtus::Attribute.build(String, :name => name)] }
-    let(:attribute)  { Virtus::Attribute.build(String, :name => name) }
+    let(:attribute)  {  Virtus::Attribute.build(String, :name => name) }
 
     it { is_expected.to equal(object) }
 
-    it 'replaces the original attribute' do
-      expect { subject }.to change { object.to_a }.from(attributes).to([attribute])
+    it "replaces the original attribute object" do
+      expect { subject }.to change { object.to_a.map(&:__id__) }.
+      from(attributes.map(&:__id__)).
+      to([attribute.__id__])
     end
   end
 end