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describe :float_equal, shared: true do
it "returns true if self has the same value as other" do
1.0.send(@method, 1).should == true
2.71828.send(@method, 1.428).should == false
-4.2.send(@method, 4.2).should == false
end
it "calls 'other == self' if coercion fails" do
x = mock('other')
def x.==(other)
2.0 == other
end
1.0.send(@method, x).should == false
2.0.send(@method, x).should == true
end
it "returns false if one side is NaN" do
[1.0, 42, bignum_value].each { |n|
(nan_value.send(@method, n)).should == false
(n.send(@method, nan_value)).should == false
}
end
it "handles positive infinity" do
[1.0, 42, bignum_value].each { |n|
(infinity_value.send(@method, n)).should == false
(n.send(@method, infinity_value)).should == false
}
end
it "handles negative infinity" do
[1.0, 42, bignum_value].each { |n|
((-infinity_value).send(@method, n)).should == false
(n.send(@method, -infinity_value)).should == false
}
end
end
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