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401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
41 lines
1.5 KiB
Ruby
41 lines
1.5 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "Math.hypot" do
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it "returns a float" do
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Math.hypot(3, 4).should be_kind_of(Float)
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end
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it "returns the length of the hypotenuse of a right triangle with legs given by the arguments" do
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Math.hypot(0, 0).should be_close(0.0, TOLERANCE)
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Math.hypot(2, 10).should be_close( 10.1980390271856, TOLERANCE)
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Math.hypot(5000, 5000).should be_close(7071.06781186548, TOLERANCE)
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Math.hypot(0.0001, 0.0002).should be_close(0.000223606797749979, TOLERANCE)
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Math.hypot(-2, -10).should be_close(10.1980390271856, TOLERANCE)
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Math.hypot(2, 10).should be_close(10.1980390271856, TOLERANCE)
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end
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it "raises a TypeError if the argument cannot be coerced with Float()" do
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lambda { Math.hypot("test", "this") }.should raise_error(TypeError)
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end
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it "returns NaN given NaN" do
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Math.hypot(nan_value, 0).nan?.should be_true
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Math.hypot(0, nan_value).nan?.should be_true
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Math.hypot(nan_value, nan_value).nan?.should be_true
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end
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it "raises a TypeError if the argument is nil" do
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lambda { Math.hypot(nil, nil) }.should raise_error(TypeError)
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end
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it "accepts any argument that can be coerced with Float()" do
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Math.hypot(MathSpecs::Float.new, MathSpecs::Float.new).should be_close(1.4142135623731, TOLERANCE)
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end
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end
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describe "Math#hypot" do
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it "is accessible as a private instance method" do
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IncludesMath.new.send(:hypot, 2, 3.1415).should be_close(3.72411361937307, TOLERANCE)
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end
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end
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