1 files changed, 22 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/ascii_compatible_spec.rb b/spec/ruby/core/encoding/ascii_compatible_spec.rb
new file mode 100644
index 0000000000..04fc159bb8
--- /dev/null
+++ b/spec/ruby/core/encoding/ascii_compatible_spec.rb
@@ -0,0 +1,22 @@
+require_relative '../../spec_helper'
+
+describe "Encoding#ascii_compatible?" do
+  it "returns true if self represents an ASCII-compatible encoding" do
+    Encoding::UTF_8.ascii_compatible?.should == true
+  end
+
+  it "returns false if self does not represent an ASCII-compatible encoding" do
+    Encoding::UTF_16LE.ascii_compatible?.should == false
+  end
+
+  it "returns false for UTF_16 and UTF_32" do
+    Encoding::UTF_16.should_not.ascii_compatible?
+    Encoding::UTF_32.should_not.ascii_compatible?
+  end
+
+  it "is always false for dummy encodings" do
+    Encoding.list.select(&:dummy?).each do |encoding|
+      encoding.should_not.ascii_compatible?
+    end
+  end
+end