require 'spec_helper'

class Colors
  include Ruby::Enum

  define :RED, "red"
  define :GREEN, "green"
end

describe Ruby::Enum do
  it "returns an enum value" do
    Colors::RED.should eq "red"
    Colors::GREEN.should eq "green"
  end
  it "raises UninitializedConstantError on an invalid constant" do
    expect { Colors::ANYTHING }.to raise_error Ruby::Enum::Errors::UninitializedConstantError
  end
  context "#each" do
    it "iterates over constants" do
      keys = []
      enum_keys = []
      enum_values = []
      Colors.each do |key, enum|
        keys << key
        enum_keys << enum.key
        enum_values << enum.value
      end
      keys.should == [ :RED, :GREEN ]
      enum_keys.should == [ :RED, :GREEN ]
      enum_values.should == [ "red", "green" ]
    end
  end
  context "#parse" do
    it "parses exact value" do
      Colors.parse("red").should == Colors::RED
    end
    it "is case-insensitive" do
      Colors.parse("ReD").should == Colors::RED
    end
    it "returns nil for a null value" do
      Colors.parse(nil).should be_nil
    end
    it "returns nil for an invalid value" do
      Colors.parse("invalid").should be_nil
    end
  end
  context "#keys" do
    it "returns keys" do
      Colors.keys.should == [ :RED, :GREEN ]
    end
  end
  context "#values" do
    it "returns values" do
      Colors.values.should == [ "red", "green" ]
    end
  end
  context "#to_h" do
    it "returns a hash of key:values" do
      Colors.to_h.should == { :RED => "red", :GREEN => "green" }
    end
  end
end