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require_relative '../../spec_helper'
describe "Integer.sqrt" do
it "returns an integer" do
Integer.sqrt(10).should be_kind_of(Integer)
end
it "returns the integer square root of the argument" do
Integer.sqrt(0).should == 0
Integer.sqrt(1).should == 1
Integer.sqrt(24).should == 4
Integer.sqrt(25).should == 5
Integer.sqrt(10**400).should == 10**200
end
it "raises a Math::DomainError if the argument is negative" do
-> { Integer.sqrt(-4) }.should raise_error(Math::DomainError)
end
it "accepts any argument that can be coerced to Integer" do
Integer.sqrt(10.0).should == 3
end
it "converts the argument with #to_int" do
Integer.sqrt(mock_int(10)).should == 3
end
it "raises a TypeError if the argument cannot be coerced to Integer" do
-> { Integer.sqrt("test") }.should raise_error(TypeError)
end
end
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