Added specs for Hash#except

core/hash/except_spec.rb

@@ -0,0 +1,33 @@
+require_relative '../../spec_helper'
+
+ruby_version_is "3.0" do
+  describe "Hash#except" do
+    before :each do
+      @hash = { a: 1, b: 2, c: 3 }
+    end
+
+    it "returns a new duplicate hash without arguments" do
+      ret = @hash.except
+      ret.should_not equal(@hash)
+      ret.should == @hash
+    end
+
+    it "returns a hash without the requested subset" do
+      @hash.except(:c, :a).should == { b: 2 }
+    end
+
+    it "ignores keys not present in the original hash" do
+      @hash.except(:a, :chunky_bacon).should == { b: 2, c: 3 }
+    end
+
+    it "returns an instance of a subclass" do
+      klass = Class.new(Hash)
+      h = klass.new
+      h[:bar] = 12
+      h[:foo] = 42
+      r = h.except(:foo)
+      r.should == {bar: 12}
+      r.class.should == klass
+    end
+  end
+end