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95 lines
2.9 KiB
Ruby
95 lines
2.9 KiB
Ruby
require_relative '../../spec_helper'
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require_relative '../../fixtures/rational'
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describe :rational_cmp_rat, shared: true do
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it "returns 1 when self is greater than the passed argument" do
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(Rational(4, 4) <=> Rational(3, 4)).should equal(1)
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(Rational(-3, 4) <=> Rational(-4, 4)).should equal(1)
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end
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it "returns 0 when self is equal to the passed argument" do
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(Rational(4, 4) <=> Rational(4, 4)).should equal(0)
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(Rational(-3, 4) <=> Rational(-3, 4)).should equal(0)
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end
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it "returns -1 when self is less than the passed argument" do
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(Rational(3, 4) <=> Rational(4, 4)).should equal(-1)
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(Rational(-4, 4) <=> Rational(-3, 4)).should equal(-1)
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end
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end
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describe :rational_cmp_int, shared: true do
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it "returns 1 when self is greater than the passed argument" do
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(Rational(4, 4) <=> 0).should equal(1)
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(Rational(4, 4) <=> -10).should equal(1)
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(Rational(-3, 4) <=> -1).should equal(1)
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end
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it "returns 0 when self is equal to the passed argument" do
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(Rational(4, 4) <=> 1).should equal(0)
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(Rational(-8, 4) <=> -2).should equal(0)
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end
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it "returns -1 when self is less than the passed argument" do
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(Rational(3, 4) <=> 1).should equal(-1)
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(Rational(-4, 4) <=> 0).should equal(-1)
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end
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end
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describe :rational_cmp_float, shared: true do
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it "returns 1 when self is greater than the passed argument" do
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(Rational(4, 4) <=> 0.5).should equal(1)
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(Rational(4, 4) <=> -1.5).should equal(1)
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(Rational(-3, 4) <=> -0.8).should equal(1)
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end
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it "returns 0 when self is equal to the passed argument" do
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(Rational(4, 4) <=> 1.0).should equal(0)
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(Rational(-6, 4) <=> -1.5).should equal(0)
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end
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it "returns -1 when self is less than the passed argument" do
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(Rational(3, 4) <=> 1.2).should equal(-1)
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(Rational(-4, 4) <=> 0.5).should equal(-1)
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end
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end
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describe :rational_cmp_coerce, shared: true do
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it "calls #coerce on the passed argument with self" do
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rational = Rational(3, 4)
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obj = mock("Object")
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obj.should_receive(:coerce).with(rational).and_return([1, 2])
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rational <=> obj
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end
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it "calls #<=> on the coerced Rational with the coerced Object" do
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rational = Rational(3, 4)
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coerced_rational = mock("Coerced Rational")
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coerced_rational.should_receive(:<=>).and_return(:result)
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coerced_obj = mock("Coerced Object")
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obj = mock("Object")
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obj.should_receive(:coerce).and_return([coerced_rational, coerced_obj])
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(rational <=> obj).should == :result
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end
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end
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describe :rational_cmp_coerce_exception, shared: true do
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it "does not rescue exception raised in other#coerce" do
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b = mock("numeric with failed #coerce")
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b.should_receive(:coerce).and_raise(RationalSpecs::CoerceError)
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-> { Rational(3, 4) <=> b }.should raise_error(RationalSpecs::CoerceError)
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end
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end
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describe :rational_cmp_other, shared: true do
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it "returns nil" do
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(Rational <=> mock("Object")).should be_nil
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end
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end
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