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Diffstat (limited to 'spec/ruby/core/math/log10_spec.rb')
-rw-r--r-- | spec/ruby/core/math/log10_spec.rb | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/spec/ruby/core/math/log10_spec.rb b/spec/ruby/core/math/log10_spec.rb new file mode 100644 index 0000000000..8164b9994d --- /dev/null +++ b/spec/ruby/core/math/log10_spec.rb @@ -0,0 +1,45 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +# The common logarithm, having base 10 +describe "Math.log10" do + it "returns a float" do + Math.log10(1).should be_kind_of(Float) + end + + it "returns the base-10 logarithm of the argument" do + Math.log10(0.0001).should be_close(-4.0, TOLERANCE) + Math.log10(0.000000000001e-15).should be_close(-27.0, TOLERANCE) + Math.log10(1).should be_close(0.0, TOLERANCE) + Math.log10(10).should be_close(1.0, TOLERANCE) + Math.log10(10e15).should be_close(16.0, TOLERANCE) + end + + conflicts_with :Complex do + it "raises an Errno::EDOM if the argument is less than 0" do + lambda { Math.log10(-1e-15) }.should raise_error( Errno::EDOM) + end + end + + it "raises a TypeError if the argument cannot be coerced with Float()" do + lambda { Math.log10("test") }.should raise_error(TypeError) + end + + it "returns NaN given NaN" do + Math.log10(nan_value).nan?.should be_true + end + + it "raises a TypeError if the argument is nil" do + lambda { Math.log10(nil) }.should raise_error(TypeError) + end + + it "accepts any argument that can be coerced with Float()" do + Math.log10(MathSpecs::Float.new).should be_close(0.0, TOLERANCE) + end +end + +describe "Math#log10" do + it "is accessible as a private instance method" do + IncludesMath.new.send(:log10, 4.15).should be_close(0.618048096712093, TOLERANCE) + end +end |