1 files changed, 37 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..8160f44d79
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+++ b/spec/ruby/core/random/new_spec.rb
@@ -0,0 +1,37 @@
+describe "Random.new" do
+  it "returns a new instance of Random" do
+    Random.new.should be_an_instance_of(Random)
+  end
+
+  it "uses a random seed value if none is supplied" do
+    Random.new.seed.should be_an_instance_of(Bignum)
+  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
+    lambda do
+      Random.new(Complex(20,2))
+    end.should raise_error(RangeError)
+  end
+end