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41 lines
1.1 KiB
Ruby
41 lines
1.1 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'shared/mult'
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require 'bigdecimal'
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describe "BigDecimal#*" do
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it_behaves_like :bigdecimal_mult, :*, []
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end
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describe "BigDecimal#*" do
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before :each do
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@three = BigDecimal("3")
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@e3_minus = BigDecimal("3E-20001")
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@e3_plus = BigDecimal("3E20001")
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@e = BigDecimal("1.00000000000000000000123456789")
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@one = BigDecimal("1")
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end
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it "multiply self with other" do
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(@one * @one).should == @one
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(@e3_minus * @e3_plus).should == BigDecimal("9")
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# Can't do this till we implement **
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# (@e3_minus * @e3_minus).should == @e3_minus ** 2
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# So let's rewrite it as:
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(@e3_minus * @e3_minus).should == BigDecimal("9E-40002")
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(@e * @one).should == @e
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end
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describe "with Object" do
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it "tries to coerce the other operand to self" do
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object = mock("Object")
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object.should_receive(:coerce).with(@e3_minus).and_return([@e3_minus, @e3_plus])
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(@e3_minus * object).should == BigDecimal("9")
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end
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end
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describe "with Rational" do
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it "produces a BigDecimal" do
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(@three * Rational(500, 2)).should == BigDecimal("0.75e3")
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end
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end
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end
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