1 files changed, 85 insertions, 0 deletions
diff --git a/spec/rubyspec/shared/rational/comparison.rb b/spec/rubyspec/shared/rational/comparison.rb
new file mode 100644
index 0000000000..c52363781f
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+++ b/spec/rubyspec/shared/rational/comparison.rb
@@ -0,0 +1,85 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe :rational_cmp_rat, shared: true do
+  it "returns 1 when self is greater than the passed argument" do
+    (Rational(4, 4) <=> Rational(3, 4)).should equal(1)
+    (Rational(-3, 4) <=> Rational(-4, 4)).should equal(1)
+  end
+
+  it "returns 0 when self is equal to the passed argument" do
+    (Rational(4, 4) <=> Rational(4, 4)).should equal(0)
+    (Rational(-3, 4) <=> Rational(-3, 4)).should equal(0)
+  end
+
+  it "returns -1 when self is less than the passed argument" do
+    (Rational(3, 4) <=> Rational(4, 4)).should equal(-1)
+    (Rational(-4, 4) <=> Rational(-3, 4)).should equal(-1)
+  end
+end
+
+describe :rational_cmp_int, shared: true do
+  it "returns 1 when self is greater than the passed argument" do
+    (Rational(4, 4) <=> 0).should equal(1)
+    (Rational(4, 4) <=> -10).should equal(1)
+    (Rational(-3, 4) <=> -1).should equal(1)
+  end
+
+  it "returns 0 when self is equal to the passed argument" do
+    (Rational(4, 4) <=> 1).should equal(0)
+    (Rational(-8, 4) <=> -2).should equal(0)
+  end
+
+  it "returns -1 when self is less than the passed argument" do
+    (Rational(3, 4) <=> 1).should equal(-1)
+    (Rational(-4, 4) <=> 0).should equal(-1)
+  end
+end
+
+describe :rational_cmp_float, shared: true do
+  it "returns 1 when self is greater than the passed argument" do
+    (Rational(4, 4) <=> 0.5).should equal(1)
+    (Rational(4, 4) <=> -1.5).should equal(1)
+    (Rational(-3, 4) <=> -0.8).should equal(1)
+  end
+
+  it "returns 0 when self is equal to the passed argument" do
+    (Rational(4, 4) <=> 1.0).should equal(0)
+    (Rational(-6, 4) <=> -1.5).should equal(0)
+  end
+
+  it "returns -1 when self is less than the passed argument" do
+    (Rational(3, 4) <=> 1.2).should equal(-1)
+    (Rational(-4, 4) <=> 0.5).should equal(-1)
+  end
+end
+
+describe :rational_cmp_coerce, shared: true do
+  it "calls #coerce on the passed argument with self" do
+    rational = Rational(3, 4)
+
+    obj = mock("Object")
+    obj.should_receive(:coerce).with(rational).and_return([1, 2])
+
+    rational <=> obj
+  end
+
+  it "calls #<=> on the coerced Rational with the coerced Object" do
+    rational = Rational(3, 4)
+
+    coerced_rational = mock("Coerced Rational")
+    coerced_rational.should_receive(:<=>).and_return(:result)
+
+    coerced_obj = mock("Coerced Object")
+
+    obj = mock("Object")
+    obj.should_receive(:coerce).and_return([coerced_rational, coerced_obj])
+
+    (rational <=> obj).should == :result
+  end
+end
+
+describe :rational_cmp_other, shared: true do
+  it "returns nil" do
+    (Rational <=> mock("Object")).should be_nil
+  end
+end