1 files changed, 23 insertions, 0 deletions
diff --git a/spec/ruby/library/date/valid_jd_spec.rb b/spec/ruby/library/date/valid_jd_spec.rb
new file mode 100644
index 0000000000..46f22de497
--- /dev/null
+++ b/spec/ruby/library/date/valid_jd_spec.rb
@@ -0,0 +1,23 @@
+require_relative '../../spec_helper'
+require 'date'
+
+describe "Date.valid_jd?" do
+  it "returns true if passed a number value" do
+    Date.valid_jd?(-100).should == true
+    Date.valid_jd?(100.0).should == true
+    Date.valid_jd?(2**100).should == true
+    Date.valid_jd?(Rational(1,2)).should == true
+  end
+
+  it "returns false if passed nil" do
+    Date.valid_jd?(nil).should == false
+  end
+
+  it "returns false if passed symbol" do
+    Date.valid_jd?(:number).should == false
+  end
+
+  it "returns false if passed false" do
+    Date.valid_jd?(false).should == false
+  end
+end