1 files changed, 66 insertions, 0 deletions
diff --git a/spec/ruby/core/env/element_reference_spec.rb b/spec/ruby/core/env/element_reference_spec.rb
new file mode 100644
index 0000000000..2e6402dd28
--- /dev/null
+++ b/spec/ruby/core/env/element_reference_spec.rb
@@ -0,0 +1,66 @@
+# -*- encoding: ascii-8bit -*-
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "ENV.[]" do
+  before :each do
+    @variable = "returns_only_frozen_values"
+  end
+
+  after :each do
+    ENV.delete @variable
+  end
+
+  it "returns nil if the variable isn't found" do
+    ENV["this_var_is_never_set"].should == nil
+  end
+
+  it "returns only frozen values" do
+    ENV[@variable] = "a non-frozen string"
+    ENV[@variable].frozen?.should == true
+  end
+
+  platform_is :windows do
+    it "looks up values case-insensitively" do
+      ENV[@variable] = "bar"
+      ENV[@variable.upcase].should == "bar"
+    end
+  end
+end
+
+with_feature :encoding do
+  describe "ENV.[]" do
+    before :each do
+      @variable = "env_element_reference_encoding_specs"
+
+      @external = Encoding.default_external
+      @internal = Encoding.default_internal
+
+      Encoding.default_external = Encoding::ASCII_8BIT
+    end
+
+    after :each do
+      Encoding.default_external = @external
+      Encoding.default_internal = @internal
+
+      ENV.delete @variable
+    end
+
+    it "uses the locale encoding if Encoding.default_internal is nil" do
+      Encoding.default_internal = nil
+
+      locale = Encoding.find('locale')
+      locale = Encoding::ASCII_8BIT if locale == Encoding::US_ASCII
+      ENV[@variable] = "\xC3\xB8"
+      ENV[@variable].encoding.should == locale
+    end
+
+    it "transcodes from the locale encoding to Encoding.default_internal if set" do
+      # We cannot reliably know the locale encoding, so we merely check that
+      # the result string has the expected encoding.
+      ENV[@variable] = ""
+      Encoding.default_internal = Encoding::IBM437
+
+      ENV[@variable].encoding.should equal(Encoding::IBM437)
+    end
+  end
+end