2018-03-04 10:09:32 -05:00
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require_relative '../../spec_helper'
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2018-01-29 11:08:16 -05:00
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describe "Integer#remainder" do
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context "fixnum" do
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it "returns the remainder of dividing self by other" do
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5.remainder(3).should == 2
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5.remainder(3.0).should == 2.0
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5.remainder(Rational(3, 1)).should == Rational(2, 1)
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end
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it "means x-y*(x/y).truncate" do
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5.remainder(3).should == 2
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5.remainder(3.3).should be_close(1.7, TOLERANCE)
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5.remainder(3.7).should be_close(1.3, TOLERANCE)
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end
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it "keeps sign of self" do
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5.remainder( 3).should == 2
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5.remainder(-3).should == 2
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-5.remainder( 3).should == -2
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-5.remainder(-3).should == -2
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end
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it "raises TypeError if passed non-numeric argument" do
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-> { 5.remainder("3") }.should raise_error(TypeError)
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-> { 5.remainder(:"3") }.should raise_error(TypeError)
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-> { 5.remainder([]) }.should raise_error(TypeError)
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-> { 5.remainder(nil) }.should raise_error(TypeError)
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end
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end
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context "bignum" do
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it "returns the remainder of dividing self by other" do
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a = bignum_value(79)
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a.remainder(2).should == 1
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a.remainder(97.345).should be_close(46.5674996147722, TOLERANCE)
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a.remainder(bignum_value).should == 79
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end
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it "raises a ZeroDivisionError if other is zero and not a Float" do
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2019-07-27 06:40:09 -04:00
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-> { bignum_value(66).remainder(0) }.should raise_error(ZeroDivisionError)
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2018-01-29 11:08:16 -05:00
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end
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it "does raises ZeroDivisionError if other is zero and a Float" do
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a = bignum_value(7)
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b = bignum_value(32)
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2019-07-27 06:40:09 -04:00
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-> { a.remainder(0.0) }.should raise_error(ZeroDivisionError)
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-> { b.remainder(-0.0) }.should raise_error(ZeroDivisionError)
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2018-01-29 11:08:16 -05:00
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end
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end
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end
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