1 files changed, 37 insertions, 0 deletions
diff --git a/spec/ruby/core/math/sinh_spec.rb b/spec/ruby/core/math/sinh_spec.rb
new file mode 100644
index 0000000000..de0f06affa
--- /dev/null
+++ b/spec/ruby/core/math/sinh_spec.rb
@@ -0,0 +1,37 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Math.sinh" do
+  it "returns a float" do
+    Math.sinh(1.2).should.is_a?(Float)
+  end
+
+  it "returns the hyperbolic sin of the argument" do
+    Math.sinh(0.0).should == 0.0
+    Math.sinh(-0.0).should == 0.0
+    Math.sinh(1.5).should be_close(2.12927945509482, TOLERANCE)
+    Math.sinh(-2.8).should be_close(-8.19191835423591, TOLERANCE)
+  end
+
+  it "raises a TypeError if the argument cannot be coerced with Float()" do
+    -> { Math.sinh("test") }.should.raise(TypeError)
+  end
+
+  it "returns NaN given NaN" do
+    Math.sinh(nan_value).nan?.should == true
+  end
+
+  it "raises a TypeError if the argument is nil" do
+    -> { Math.sinh(nil) }.should.raise(TypeError)
+  end
+
+  it "accepts any argument that can be coerced with Float()" do
+    Math.sinh(MathSpecs::Float.new).should be_close(1.1752011936438, TOLERANCE)
+  end
+end
+
+describe "Math#sinh" do
+  it "is accessible as a private instance method" do
+    IncludesMath.new.send(:sinh, 1.99).should be_close(3.58941916843202, TOLERANCE)
+  end
+end