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require File.expand_path('../../../spec_helper', __FILE__)
ruby_version_is ""..."1.9" do
describe "Float.induced_from" do
it "returns the passed argument when passed a Float" do
Float.induced_from(5.5).should eql(5.5)
Float.induced_from(-5.5).should eql(-5.5)
Float.induced_from(TOLERANCE).should eql(TOLERANCE)
end
it "converts passed Fixnums or Bignums to Floats (using #to_f)" do
Float.induced_from(5).should eql(5.0)
Float.induced_from(-5).should eql(-5.0)
Float.induced_from(0).should eql(0.0)
Float.induced_from(bignum_value).should eql(bignum_value.to_f)
Float.induced_from(-bignum_value).should eql(-bignum_value.to_f)
end
it "does not try to convert non-Integers to Integers using #to_int" do
obj = mock("Not converted to Integer")
obj.should_not_receive(:to_int)
lambda { Float.induced_from(obj) }.should raise_error(TypeError)
end
it "does not try to convert non-Integers to Floats using #to_f" do
obj = mock("Not converted to Float")
obj.should_not_receive(:to_f)
lambda { Float.induced_from(obj) }.should raise_error(TypeError)
end
it "raises a TypeError when passed a non-Integer" do
lambda { Float.induced_from("2") }.should raise_error(TypeError)
lambda { Float.induced_from(:symbol) }.should raise_error(TypeError)
lambda { Float.induced_from(Object.new) }.should raise_error(TypeError)
end
end
end
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