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Diffstat (limited to 'spec/ruby/core/math/frexp_spec.rb')
-rw-r--r-- | spec/ruby/core/math/frexp_spec.rb | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/spec/ruby/core/math/frexp_spec.rb b/spec/ruby/core/math/frexp_spec.rb new file mode 100644 index 0000000000..4c529b0911 --- /dev/null +++ b/spec/ruby/core/math/frexp_spec.rb @@ -0,0 +1,37 @@ +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 |