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b9ef35e4c6
Implement Complex#<=> so that it is usable as an argument when calling <=> on objects of other classes (since #coerce will coerce such numbers to Complex). If the complex number has a zero imaginary part, and the other argument is a real number (or complex number with zero imaginary part), return -1, 0, or 1. Otherwise, return nil, indicating the objects are not comparable. Fixes [Bug #15857]
27 lines
861 B
Ruby
27 lines
861 B
Ruby
require_relative '../../spec_helper'
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describe "Complex#<=>" do
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ruby_version_is '2.7' do
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it "returns nil if either self or argument has imaginary part" do
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(Complex(5, 1) <=> Complex(2)).should be_nil
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(Complex(1) <=> Complex(2, 1)).should be_nil
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(5 <=> Complex(2, 1)).should be_nil
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end
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it "returns nil if argument is not numeric" do
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(Complex(5, 1) <=> "cmp").should be_nil
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(Complex(1) <=> "cmp").should be_nil
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(Complex(1) <=> Object.new).should be_nil
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end
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it "returns 0, 1, or -1 if self and argument do not have imaginary part" do
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(Complex(5) <=> Complex(2)).should == 1
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(Complex(2) <=> Complex(3)).should == -1
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(Complex(2) <=> Complex(2)).should == 0
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(Complex(5) <=> 2).should == 1
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(Complex(2) <=> 3).should == -1
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(Complex(2) <=> 2).should == 0
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end
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end
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end
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