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require_relative '../../spec_helper'
describe "Complex#==" do
describe "with Complex" do
it "returns true when self and other have numerical equality" do
Complex(1, 2).should == Complex(1, 2)
Complex(3, 9).should == Complex(3, 9)
Complex(-3, -9).should == Complex(-3, -9)
Complex(1, 2).should_not == Complex(3, 4)
Complex(3, 9).should_not == Complex(9, 3)
Complex(1.0, 2.0).should == Complex(1, 2)
Complex(3.0, 9.0).should_not == Complex(9.0, 3.0)
Complex(1.5, 2.5).should == Complex(1.5, 2.5)
Complex(1.5, 2.5).should == Complex(1.5, 2.5)
Complex(-1.5, 2.5).should == Complex(-1.5, 2.5)
Complex(1.5, 2.5).should_not == Complex(2.5, 1.5)
Complex(3.75, 2.5).should_not == Complex(1.5, 2.5)
Complex(bignum_value, 2.5).should == Complex(bignum_value, 2.5)
Complex(3.75, bignum_value).should_not == Complex(1.5, bignum_value)
Complex(nan_value).should_not == Complex(nan_value)
end
end
describe "with Numeric" do
it "returns true when self's imaginary part is 0 and the real part and other have numerical equality" do
Complex(3, 0).should == 3
Complex(-3, 0).should == -3
Complex(3.5, 0).should == 3.5
Complex(-3.5, 0).should == -3.5
Complex(bignum_value, 0).should == bignum_value
Complex(-bignum_value, 0).should == -bignum_value
Complex(3.0, 0).should == 3
Complex(-3.0, 0).should == -3
Complex(3, 0).should_not == 4
Complex(-3, 0).should_not == -4
Complex(3.5, 0).should_not == -4.5
Complex(-3.5, 0).should_not == 2.5
Complex(bignum_value, 0).should_not == bignum_value(10)
Complex(-bignum_value, 0).should_not == -bignum_value(20)
end
end
describe "with Object" do
# Integer#== and Float#== only return booleans - Bug?
it "calls other#== with self" do
value = Complex(3, 0)
obj = mock("Object")
obj.should_receive(:==).with(value).and_return(:expected)
(value == obj).should_not be_false
end
end
describe "with a Numeric which responds to #real? with true" do
before do
@other = mock_numeric('other')
@other.should_receive(:real?).any_number_of_times.and_return(true)
end
it "returns real == other when the imaginary part is zero" do
real = mock_numeric('real')
real.should_receive(:==).with(@other).and_return(true)
(Complex(real, 0) == @other).should be_true
end
it "returns false when when the imaginary part is not zero" do
(Complex(3, 1) == @other).should be_false
end
end
describe "with a Numeric which responds to #real? with false" do
it "returns other == self" do
complex = Complex(3, 0)
other = mock_numeric('other')
other.should_receive(:real?).any_number_of_times.and_return(false)
other.should_receive(:==).with(complex).and_return(true)
(complex == other).should be_true
end
end
end
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