Add validator for qualidied domain array

- Validate that the entries contain no unicode, html tags and are not
larger than 255 characters.

1 files changed, 111 insertions, 0 deletions

diff --git a/spec/validators/qualified_domain_array_validator_spec.rb b/spec/validators/qualified_domain_array_validator_spec.rb
new file mode 100644
index 00000000000..a96b00bfd1d
--- /dev/null
+++ b/spec/validators/qualified_domain_array_validator_spec.rb
@@ -0,0 +1,111 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe QualifiedDomainArrayValidator do
+  class TestClass
+    include ActiveModel::Validations
+
+    attr_accessor :domain_array
+
+    def initialize(domain_array)
+      self.domain_array = domain_array
+    end
+  end
+
+  let!(:record) do
+    TestClass.new(['gitlab.com'])
+  end
+
+  subject { validator.validate(record) }
+
+  shared_examples 'cannot be blank' do
+    it 'returns error when attribute is blank' do
+      record.domain_array = []
+
+      subject
+
+      expect(record.errors).to be_present
+      expect(record.errors.first[1]).to eq 'entries cannot be blank'
+    end
+  end
+
+  shared_examples 'can be nil' do
+    it 'allows when attribute is nil' do
+      record.domain_array = nil
+
+      subject
+
+      expect(record.errors).to be_empty
+    end
+  end
+
+  describe 'validations' do
+    let(:validator) { described_class.new(attributes: [:domain_array]) }
+
+    it_behaves_like 'cannot be blank'
+
+    it 'returns error when attribute is nil' do
+      record.domain_array = nil
+
+      subject
+
+      expect(record.errors).to be_present
+    end
+
+    it 'allows when domain is valid' do
+      subject
+
+      expect(record.errors).to be_empty
+    end
+
+    it 'returns error when domain contains unicode' do
+      record.domain_array = ['ğitlab.com']
+
+      subject
+
+      expect(record.errors).to be_present
+      expect(record.errors.first[1]).to eq 'unicode domains should use IDNA encoding'
+    end
+
+    it 'returns error when entry is larger than 255 chars' do
+      record.domain_array = ['a' * 256]
+
+      subject
+
+      expect(record.errors).to be_present
+      expect(record.errors.first[1]).to eq 'entries cannot be larger than 255 characters'
+    end
+
+    it 'returns error when entry contains HTML tags' do
+      record.domain_array = ['gitlab.com<h1>something</h1>']
+
+      subject
+
+      expect(record.errors).to be_present
+      expect(record.errors.first[1]).to eq 'entries cannot contain HTML tags'
+    end
+  end
+
+  context 'when allow_nil is set to true' do
+    let(:validator) { described_class.new(attributes: [:domain_array], allow_nil: true) }
+
+    it_behaves_like 'can be nil'
+
+    it_behaves_like 'cannot be blank'
+  end
+
+  context 'when allow_blank is set to true' do
+    let(:validator) { described_class.new(attributes: [:domain_array], allow_blank: true) }
+
+    it_behaves_like 'can be nil'
+
+    it 'allows when attribute is blank' do
+      record.domain_array = []
+
+      subject
+
+      expect(record.errors).to be_empty
+    end
+  end
+end