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require File.expand_path('../../../spec_helper', __FILE__)
describe :complex_divide_complex, :shared => true do
it "divides according to the usual rule for complex numbers" do
a = Complex((1 * 10) - (2 * 20), (1 * 20) + (2 * 10))
b = Complex(1, 2)
(a / b).should == Complex(10, 20)
c = Complex((1.5 * 100.2) - (2.1 * -30.3), (1.5 * -30.3) + (2.1 * 100.2))
d = Complex(1.5, 2.1)
# remember the floating-point arithmetic
(c / d).should be_close(Complex(100.2, -30.3), TOLERANCE)
end
end
describe :complex_divide_fixnum, :shared => true do
it "divides both parts of the Complex number" do
(Complex(20, 40) / 2).should == Complex(10, 20)
(Complex(30, 30) / 10).should == Complex(3, 3)
end
it "raises a ZeroDivisionError when given zero" do
lambda { Complex(20, 40) / 0 }.should raise_error(ZeroDivisionError)
end
end
describe :complex_divide_bignum, :shared => true do
it "divides both parts of the Complex number" do
(Complex(20, 40) / 2).should == Complex(10, 20)
(Complex(15, 16) / 2.0).should be_close(Complex(7.5, 8), TOLERANCE)
end
end
describe :complex_divide_float, :shared => true do
it "divides both parts of the Complex number" do
(Complex(3, 9) / 1.5).should == Complex(2, 6)
(Complex(15, 16) / 2.0).should be_close(Complex(7.5, 8), TOLERANCE)
end
it "returns Complex(Infinity, Infinity) when given zero" do
(Complex(20, 40) / 0.0).real.infinite?.should == 1
(Complex(20, 40) / 0.0).imag.infinite?.should == 1
(Complex(-20, 40) / 0.0).real.infinite?.should == -1
(Complex(-20, 40) / 0.0).imag.infinite?.should == 1
end
end
describe :complex_divide_object, :shared => true do
it "tries to coerce self into other" do
value = Complex(3, 9)
obj = mock("Object")
obj.should_receive(:coerce).with(value).and_return([4, 2])
(value / obj).should == 2
end
end
Version data entries
52 entries across 52 versions & 2 rubygems