1 files changed, 32 insertions, 0 deletions
diff --git a/spec/ruby/core/complex/finite_spec.rb b/spec/ruby/core/complex/finite_spec.rb
new file mode 100644
index 0000000000..7d9f82404e
--- /dev/null
+++ b/spec/ruby/core/complex/finite_spec.rb
@@ -0,0 +1,32 @@
+require_relative '../../spec_helper'
+
+describe "Complex#finite?" do
+  it "returns true if magnitude is finite" do
+    (1+1i).should.finite?
+  end
+
+  it "returns false for positive infinity" do
+    value = Complex(Float::INFINITY, 42)
+    value.should_not.finite?
+  end
+
+  it "returns false for positive complex with infinite imaginary" do
+    value = Complex(1, Float::INFINITY)
+    value.should_not.finite?
+  end
+
+  it "returns false for negative infinity" do
+    value = -Complex(Float::INFINITY, 42)
+    value.should_not.finite?
+  end
+
+  it "returns false for negative complex with infinite imaginary" do
+    value = -Complex(1, Float::INFINITY)
+    value.should_not.finite?
+  end
+
+  it "returns false for NaN" do
+    value = Complex(Float::NAN, Float::NAN)
+    value.should_not.finite?
+  end
+end