Add specs for Enum class

spec/components/enum_spec.rb

@@ -0,0 +1,40 @@
+require 'spec_helper'
+require 'email'
+
+describe Enum do
+
+  let(:enum) { Enum.new(:jake, :finn, :princess_bubblegum, :peppermint_butler) }
+
+  context ".[]" do
+    it "allows us to look up a number by symbol" do
+      enum[:princess_bubblegum].should == 3
+    end
+
+    it "allows us to look up a symbol by number" do
+      enum[2].should == :finn
+    end
+  end
+
+  context ".valid?" do
+    it "returns true for a value that exists" do
+      enum.valid?(4).should be_false
+    end
+
+    it "returns true for a key that doesn't exist" do
+      enum.valid?(:ice_king).should be_false
+    end
+  end
+
+  context ".only" do
+    it "returns only the values we ask for" do
+      enum.only(:jake, :princess_bubblegum).should == {jake: 1, princess_bubblegum: 3}
+    end
+  end
+
+  context ".except" do
+    it "doesn't return the values we don't want" do
+      enum.except(:jake, :princess_bubblegum).should == {finn: 2, peppermint_butler: 4}
+    end
+  end
+
+end