1 files changed, 38 insertions, 0 deletions
diff --git a/spec/ruby/core/random/new_spec.rb b/spec/ruby/core/random/new_spec.rb
new file mode 100644
index 0000000000..e20d487137
--- /dev/null
+++ b/spec/ruby/core/random/new_spec.rb
@@ -0,0 +1,38 @@
+require_relative "../../spec_helper"
+describe "Random.new" do
+  it "returns a new instance of Random" do
+    Random.new.should.instance_of?(Random)
+  end
+
+  it "uses a random seed value if none is supplied" do
+    Random.new.seed.should.instance_of?(Integer)
+  end
+
+  it "returns Random instances initialized with different seeds" do
+    first = Random.new
+    second = Random.new
+    (0..20).map { first.rand }.should_not == (0..20).map { second.rand }
+  end
+
+  it "accepts an Integer seed value as an argument" do
+    Random.new(2).seed.should == 2
+  end
+
+  it "accepts (and truncates) a Float seed value as an argument" do
+    Random.new(3.4).seed.should == 3
+  end
+
+  it "accepts (and converts to Integer) a Rational seed value as an argument" do
+    Random.new(Rational(20,2)).seed.should == 10
+  end
+
+  it "accepts (and converts to Integer) a Complex (without imaginary part) seed value as an argument" do
+    Random.new(Complex(20)).seed.should == 20
+  end
+
+  it "raises a RangeError if passed a Complex (with imaginary part) seed value as an argument" do
+    -> do
+      Random.new(Complex(20,2))
+    end.should.raise(RangeError)
+  end
+end