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require File.expand_path('../../../spec_helper', __FILE__)
require 'bigdecimal'
ruby_version_is "" ... "1.9" do
describe "BigDecimal.induced_from" do
it "returns the passed argument when passed a BigDecimal" do
BigDecimal.induced_from(BigDecimal("5")).should == BigDecimal("5")
BigDecimal.induced_from(BigDecimal("-5")).should == BigDecimal("-5")
BigDecimal.induced_from(BigDecimal("Infinity")).should == BigDecimal("Infinity")
end
it "converts passed Fixnums to BigDecimal" do
BigDecimal.induced_from(5).should == BigDecimal("5")
BigDecimal.induced_from(-5).should == BigDecimal("-5")
BigDecimal.induced_from(0).should == BigDecimal("0")
end
it "converts passed Bignums to BigDecimal" do
BigDecimal.induced_from(bignum_value).should == BigDecimal(bignum_value.to_s)
BigDecimal.induced_from(-bignum_value).should == BigDecimal((-bignum_value).to_s)
end
it "does not try to convert non-Integers to Integer using #to_i" do
obj = mock("Not converted to Integer")
obj.should_not_receive(:to_i)
lambda { BigDecimal.induced_from(obj) }.should raise_error(TypeError)
end
it "raises a TypeError when passed a non-Integer" do
lambda { BigDecimal.induced_from(2.0) }.should raise_error(TypeError)
lambda { BigDecimal.induced_from("2") }.should raise_error(TypeError)
lambda { BigDecimal.induced_from(:symbol) }.should raise_error(TypeError)
lambda { BigDecimal.induced_from(nil) }.should raise_error(TypeError)
lambda { BigDecimal.induced_from(Object.new) }.should raise_error(TypeError)
end
end
end
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