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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
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