1 files changed, 27 insertions, 2 deletions
diff --git a/spec/ruby/core/env/value_spec.rb b/spec/ruby/core/env/value_spec.rb
index 906e86ab39..c732cfbd15 100644
--- a/spec/ruby/core/env/value_spec.rb
+++ b/spec/ruby/core/env/value_spec.rb
@@ -1,6 +1,31 @@
 require_relative '../../spec_helper'
-require_relative 'shared/value'
 
 describe "ENV.value?" do
-  it_behaves_like :env_value, :value?
+  before :each do
+    @saved_foo = ENV["foo"]
+  end
+
+  after :each do
+    ENV["foo"] = @saved_foo
+  end
+
+  it "returns true if ENV has the value" do
+    ENV["foo"] = "bar"
+    ENV.value?("bar").should == true
+  end
+
+  it "returns false if ENV doesn't have the value" do
+    ENV.value?("foo").should == false
+  end
+
+  it "coerces the value element with #to_str" do
+    ENV["foo"] = "bar"
+    v = mock('value')
+    v.should_receive(:to_str).and_return("bar")
+    ENV.value?(v).should == true
+  end
+
+  it "returns nil if the argument is not a String and does not respond to #to_str" do
+    ENV.value?(Object.new).should == nil
+  end
 end