1 files changed, 36 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..e9ee19bef3
--- /dev/null
+++ b/spec/ruby/core/complex/finite_spec.rb
@@ -0,0 +1,36 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+ruby_version_is "2.4" do
+  describe "Complex#finite?" do
+    it "returns true if magnitude is finite" do
+      (1+1i).finite?.should == true
+    end
+
+    it "returns false for positive infinity" do
+      value = Complex(Float::INFINITY, 42)
+      value.finite?.should == false
+    end
+
+    it "returns false for positive complex with infinite imaginary" do
+      value = Complex(1, Float::INFINITY)
+      value.finite?.should == false
+    end
+
+    it "returns false for negative infinity" do
+      value = -Complex(Float::INFINITY, 42)
+      value.finite?.should == false
+    end
+
+    it "returns false for negative complex with infinite imaginary" do
+      value = -Complex(1, Float::INFINITY)
+      value.finite?.should == false
+    end
+
+    ruby_bug "#14014", "2.4"..."2.5" do
+      it "returns false for NaN" do
+        value = Complex(Float::NAN, Float::NAN)
+        value.finite?.should == false
+      end
+    end
+  end
+end