1 files changed, 61 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/srand_spec.rb b/spec/ruby/core/kernel/srand_spec.rb
new file mode 100644
index 0000000000..33f99f5ac4
--- /dev/null
+++ b/spec/ruby/core/kernel/srand_spec.rb
@@ -0,0 +1,61 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Kernel.srand" do
+  it "is a private method" do
+    Kernel.should have_private_instance_method(:srand)
+  end
+
+  it "returns the previous seed value" do
+    srand(10)
+    srand(20).should == 10
+  end
+
+  it "seeds the RNG correctly and repeatably" do
+    srand(10)
+    x = rand
+    srand(10)
+    rand.should == x
+  end
+
+  it "defaults number to a random value" do
+    lambda { srand }.should_not raise_error
+    srand.should_not == 0
+  end
+
+  it "accepts and uses a seed of 0" do
+    srand(0)
+    srand.should == 0
+  end
+
+  it "accepts a negative seed" do
+    srand(-17)
+    srand.should == -17
+  end
+
+  it "accepts a Bignum as a seed" do
+    srand(0x12345678901234567890)
+    srand.should == 0x12345678901234567890
+  end
+
+  it "calls #to_int on seed" do
+    srand(3.8)
+    srand.should == 3
+
+    s = mock('seed')
+    s.should_receive(:to_int).and_return 0
+    srand(s)
+  end
+
+  it "raises a TypeError when passed nil" do
+    lambda { srand(nil) }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError when passed a String" do
+    lambda { srand("7") }.should raise_error(TypeError)
+  end
+end
+
+describe "Kernel#srand" do
+  it "needs to be reviewed for spec completeness"
+end