1 files changed, 31 insertions, 0 deletions
diff --git a/spec/ruby/core/env/assoc_spec.rb b/spec/ruby/core/env/assoc_spec.rb
new file mode 100644
index 0000000000..b81be7ddf2
--- /dev/null
+++ b/spec/ruby/core/env/assoc_spec.rb
@@ -0,0 +1,31 @@
+require_relative '../../spec_helper'
+
+describe "ENV.assoc" do
+  before :each do
+    @foo = ENV["foo"]
+  end
+
+  after :each do
+    ENV["foo"] = @foo
+  end
+
+  it "returns an array of the key and value of the environment variable with the given key" do
+    ENV["foo"] = "bar"
+    ENV.assoc("foo").should == ["foo", "bar"]
+  end
+
+  it "returns nil if no environment variable with the given key exists" do
+    ENV.assoc("foo").should == nil
+  end
+
+  it "returns the key element coerced with #to_str" do
+    ENV["foo"] = "bar"
+    k = mock('key')
+    k.should_receive(:to_str).and_return("foo")
+    ENV.assoc(k).should == ["foo", "bar"]
+  end
+
+  it "raises TypeError if the argument is not a String and does not respond to #to_str" do
+    -> { ENV.assoc(Object.new) }.should.raise(TypeError, "no implicit conversion of Object into String")
+  end
+end