Align EmailValidator to validate_email gem implementation.

Renamed EmailValidator to DeviseEmailValidator to avoid 'email:' naming collision with ActiveModel::Validations::EmailValidator in 'validates' statement.
Make use of the options attribute of the parent class ActiveModel::EachValidator.
Add more options: regex.

1 files changed, 94 insertions, 0 deletions

diff --git a/spec/validators/devise_email_validator_spec.rb b/spec/validators/devise_email_validator_spec.rb
new file mode 100644
index 00000000000..7860b659bd3
--- /dev/null
+++ b/spec/validators/devise_email_validator_spec.rb
@@ -0,0 +1,94 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe DeviseEmailValidator do
+  let!(:user) { build(:user, public_email: 'test@example.com') }
+  subject { validator.validate(user) }
+
+  describe 'validations' do
+    context 'by default' do
+      let(:validator) { described_class.new(attributes: [:public_email]) }
+
+      it 'allows when email is valid' do
+        subject
+
+        expect(user.errors).to be_empty
+      end
+
+      it 'returns error when email is invalid' do
+        user.public_email = 'invalid'
+
+        subject
+
+        expect(user.errors).to be_present
+        expect(user.errors.first[1]).to eq 'is invalid'
+      end
+
+      it 'returns error when email is nil' do
+        user.public_email = nil
+
+        subject
+
+        expect(user.errors).to be_present
+      end
+
+      it 'returns error when email is blank' do
+        user.public_email = ''
+
+        subject
+
+        expect(user.errors).to be_present
+        expect(user.errors.first[1]).to eq 'is invalid'
+      end
+    end
+  end
+
+  context 'when regexp is set as Regexp' do
+    let(:validator) { described_class.new(attributes: [:public_email], regexp: /[0-9]/) }
+
+    it 'allows when value match' do
+      user.public_email = '1'
+
+      subject
+
+      expect(user.errors).to be_empty
+    end
+
+    it 'returns error when value does not match' do
+      subject
+
+      expect(user.errors).to be_present
+    end
+  end
+
+  context 'when regexp is set as String' do
+    it 'raise argument error' do
+      expect { described_class.new( { regexp: 'something' } ) }.to raise_error ArgumentError
+    end
+  end
+
+  context 'when allow_nil is set to true' do
+    let(:validator) { described_class.new(attributes: [:public_email], allow_nil: true) }
+
+    it 'allows when email is nil' do
+      user.public_email = nil
+
+      subject
+
+      expect(user.errors).to be_empty
+    end
+  end
+
+  context 'when allow_blank is set to true' do
+    let(:validator) { described_class.new(attributes: [:public_email], allow_blank: true) }
+
+    it 'allows when email is blank' do
+      user.public_email = ''
+
+      subject
+
+      expect(user.errors).to be_empty
+    end
+  end
+end