1 files changed, 42 insertions, 0 deletions
diff --git a/spec/ruby/core/math/asinh_spec.rb b/spec/ruby/core/math/asinh_spec.rb
new file mode 100644
index 0000000000..0761285806
--- /dev/null
+++ b/spec/ruby/core/math/asinh_spec.rb
@@ -0,0 +1,42 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Math.asinh" do
+  it "returns a float" do
+    Math.asinh(1.5).should be_kind_of(Float)
+  end
+
+  it "returns the inverse hyperbolic sin of the argument" do
+    Math.asinh(1.5).should be_close(1.19476321728711, TOLERANCE)
+    Math.asinh(-2.97).should be_close(-1.8089166921397, TOLERANCE)
+    Math.asinh(0.0).should == 0.0
+    Math.asinh(-0.0).should == -0.0
+    Math.asinh(1.05367e-08).should be_close(1.05367e-08, TOLERANCE)
+    Math.asinh(-1.05367e-08).should be_close(-1.05367e-08, TOLERANCE)
+    # Default tolerance does not scale right for these...
+    #Math.asinh(94906265.62).should be_close(19.0615, TOLERANCE)
+    #Math.asinh(-94906265.62).should be_close(-19.0615, TOLERANCE)
+  end
+
+  it "raises a TypeError if the argument cannot be coerced with Float()" do
+    lambda { Math.asinh("test") }.should raise_error(TypeError)
+  end
+
+  it "returns NaN given NaN" do
+    Math.asinh(nan_value).nan?.should be_true
+  end
+
+  it "raises a TypeError if the argument is nil" do
+    lambda { Math.asinh(nil) }.should raise_error(TypeError)
+  end
+
+  it "accepts any argument that can be coerced with Float()" do
+    Math.asinh(MathSpecs::Float.new).should be_close(0.881373587019543, TOLERANCE)
+  end
+end
+
+describe "Math#asinh" do
+  it "is accessible as a private instance method" do
+    IncludesMath.new.send(:asinh, 19.275).should be_close(3.65262832292466, TOLERANCE)
+  end
+end