Env tests

lib/chervil/env.rb

@@ -1,7 +1,19 @@
 module Chervil
   class Env
-    def initialize(parent = {})
-      @data = parent
+    attr_reader :data
+
+    def initialize(parent = nil)
+      @data = Hash.new
+
+      Core::CORE.each do |k, v|
+        set(k, v)
+      end
+
+      unless parent.nil?
+        parent.data.each do |k, v|
+          set(k, v)
+        end
+      end
     end
 
     def get(name)

spec/env_spec.rb

@@ -0,0 +1,15 @@
+module Chervil
+  RSpec.describe Env do
+    it 'has arithmetic from core' do
+      env = Env.new
+      expect(env.get("+").call(1, 2)).to eq(3)
+    end
+
+    it 'inherits from parent env' do
+      parent = Env.new
+      parent.set("x", 5)
+      child = Env.new(parent)
+      expect(child.get("x")).to eq(5)
+    end
+  end
+end