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-rw-r--r--spec/rubyspec/core/math/frexp_spec.rb37
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diff --git a/spec/rubyspec/core/math/frexp_spec.rb b/spec/rubyspec/core/math/frexp_spec.rb
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+++ b/spec/rubyspec/core/math/frexp_spec.rb
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+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Math.frexp" do
+ it "returns the normalized fraction and exponent" do
+ frac, exp = Math.frexp(102.83)
+ frac.should be_close(0.803359375, TOLERANCE)
+ exp.should == 7
+ end
+
+ it "raises a TypeError if the argument cannot be coerced with Float()" do
+ lambda { Math.frexp("test") }.should raise_error(TypeError)
+ end
+
+ it "returns NaN given NaN" do
+ frac, _exp = Math.frexp(nan_value)
+ frac.nan?.should be_true
+ end
+
+ it "raises a TypeError if the argument is nil" do
+ lambda { Math.frexp(nil) }.should raise_error(TypeError)
+ end
+
+ it "accepts any argument that can be coerced with Float()" do
+ frac, exp = Math.frexp(MathSpecs::Float.new)
+ frac.should be_close(0.5, TOLERANCE)
+ exp.should == 1
+ end
+end
+
+describe "Math#frexp" do
+ it "is accessible as a private instance method" do
+ frac, exp = IncludesMath.new.send(:frexp, 2.1415)
+ frac.should be_close(0.535375, TOLERANCE)
+ exp.should == 2
+ end
+end