1 files changed, 30 insertions, 0 deletions
diff --git a/spec/ruby/library/complex/math/shared/atanh.rb b/spec/ruby/library/complex/math/shared/atanh.rb
new file mode 100644
index 0000000000..4051af081f
--- /dev/null
+++ b/spec/ruby/library/complex/math/shared/atanh.rb
@@ -0,0 +1,30 @@
+require File.expand_path('../../fixtures/classes', __FILE__)
+
+describe :complex_math_atanh_complex, shared: true do
+  it "returns the inverse hyperbolic tangent as a Complex number for arguments greater than 1.0" do
+    value = Complex(18.36840028483855, 1.5707963267948966)
+    @object.send(@method, 1.0 + Float::EPSILON).should be_close(value, TOLERANCE)
+
+    value = Complex(0.100335347731076, 1.5707963267949)
+    @object.send(@method, 10).should be_close(value, TOLERANCE)
+  end
+
+  it "returns the inverse hyperbolic tangent as a Complex number for arguments greater than 1.0" do
+    value = Complex(-18.36840028483855, 1.5707963267948966)
+    @object.send(@method, -1.0 - Float::EPSILON).should be_close(value, TOLERANCE)
+
+    value = Complex(0.100335347731076, 1.5707963267949)
+    @object.send(@method, 10).should be_close(value, TOLERANCE)
+  end
+
+  it "returns the inverse hyperbolic tangent for Complex numbers" do
+    value = Complex(0.117500907311434, 1.40992104959658)
+    @object.send(@method, Complex(3, 4)).should be_close(value, TOLERANCE)
+  end
+end
+
+describe :complex_math_atanh_no_complex, shared: true do
+  it "raises a TypeError when passed a Complex number" do
+    lambda { @object.send(:atanh!, Complex(4, 5)) }.should raise_error(TypeError)
+  end
+end