1 files changed, 72 insertions, 0 deletions
diff --git a/test/ruby/test_comparable.rb b/test/ruby/test_comparable.rb
new file mode 100644
index 0000000000..00ce6b485a
--- /dev/null
+++ b/test/ruby/test_comparable.rb
@@ -0,0 +1,72 @@
+require 'test/unit'
+
+class TestComparable < Test::Unit::TestCase
+  def setup
+    @o = Object.new
+    @o.extend(Comparable)
+  end
+  def cmp(b)
+    class << @o; self; end.class_eval {
+      undef :<=>
+      define_method(:<=>, b)
+    }
+  end
+
+  def test_equal
+    cmp->(x) do 0; end
+    assert_equal(true, @o == nil)
+    cmp->(x) do 1; end
+    assert_equal(false, @o == nil)
+    cmp->(x) do raise; end
+    assert_equal(false, @o == nil)
+  end
+
+  def test_gt
+    cmp->(x) do 1; end
+    assert_equal(true, @o > nil)
+    cmp->(x) do 0; end
+    assert_equal(false, @o > nil)
+    cmp->(x) do -1; end
+    assert_equal(false, @o > nil)
+  end
+
+  def test_ge
+    cmp->(x) do 1; end
+    assert_equal(true, @o >= nil)
+    cmp->(x) do 0; end
+    assert_equal(true, @o >= nil)
+    cmp->(x) do -1; end
+    assert_equal(false, @o >= nil)
+  end
+
+  def test_lt
+    cmp->(x) do 1; end
+    assert_equal(false, @o < nil)
+    cmp->(x) do 0; end
+    assert_equal(false, @o < nil)
+    cmp->(x) do -1; end
+    assert_equal(true, @o < nil)
+  end
+
+  def test_le
+    cmp->(x) do 1; end
+    assert_equal(false, @o <= nil)
+    cmp->(x) do 0; end
+    assert_equal(true, @o <= nil)
+    cmp->(x) do -1; end
+    assert_equal(true, @o <= nil)
+  end
+
+  def test_between
+    cmp->(x) do 0 <=> x end
+    assert_equal(false, @o.between?(1, 2))
+    assert_equal(false, @o.between?(-2, -1))
+    assert_equal(true, @o.between?(-1, 1))
+    assert_equal(true, @o.between?(0, 0))
+  end
+
+  def test_err
+    assert_raise(ArgumentError) { 1.0 < nil }
+    assert_raise(ArgumentError) { 1.0 < Object.new }
+  end
+end