1 files changed, 24 insertions, 0 deletions
diff --git a/spec/ruby/core/random/new_seed_spec.rb b/spec/ruby/core/random/new_seed_spec.rb
new file mode 100644
index 0000000000..a8efaee2b1
--- /dev/null
+++ b/spec/ruby/core/random/new_seed_spec.rb
@@ -0,0 +1,24 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Random.new_seed" do
+  it "returns a Bignum" do
+    Random.new_seed.should be_an_instance_of(Bignum)
+  end
+
+  it "returns an arbitrary seed value each time" do
+    bigs = 200.times.map { Random.new_seed }
+    bigs.uniq.size.should == 200
+  end
+
+  it "is not affected by Kernel#srand" do
+    begin
+      srand 25
+      a = Random.new_seed
+      srand 25
+      b = Random.new_seed
+      a.should_not == b
+    ensure
+      srand Random.new_seed
+    end
+  end
+end