DRY'uped validator spec

validator_spec.rb

require 'spec_helper'

shared_examples "valid" do
  it { expect { subject }.not_to raise_error(Avalon::Error) }
end

shared_examples "invalid" do
  it { expect { subject }.to raise_error(Avalon::Error) }
end

describe Avalon::Validator do
  let(:validator) { described_class.new candidate, pattern }
  let(:candidate) { "target" }

  describe "#validate" do
    subject { validator.validate }

    context "given pattern as String", "when match" do
      let(:pattern) { "target" }
      it_behaves_like "valid"
    end

    context "given pattern as String", "when NOT match" do
      let(:pattern) { "not matched" }
      it_behaves_like "invalid"
    end

    context "given pattern as Regexp", "when match" do
      let(:pattern) { /target/ }
      it_behaves_like "valid"
    end

    context "given pattern as Regexp", "when NOT match" do
      let(:pattern) { /not matched/ }
      it_behaves_like "invalid"
    end
  end
end