62 lines
1.2 KiB
Ruby
62 lines
1.2 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "Kernel.srand" do
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it "is a private method" do
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Kernel.should have_private_instance_method(:srand)
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end
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it "returns the previous seed value" do
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srand(10)
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srand(20).should == 10
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end
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it "seeds the RNG correctly and repeatably" do
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srand(10)
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x = rand
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srand(10)
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rand.should == x
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end
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it "defaults number to a random value" do
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-> { srand }.should_not raise_error
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srand.should_not == 0
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end
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it "accepts and uses a seed of 0" do
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srand(0)
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srand.should == 0
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end
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it "accepts a negative seed" do
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srand(-17)
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srand.should == -17
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end
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it "accepts a Bignum as a seed" do
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srand(0x12345678901234567890)
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srand.should == 0x12345678901234567890
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end
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it "calls #to_int on seed" do
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srand(3.8)
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srand.should == 3
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s = mock('seed')
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s.should_receive(:to_int).and_return 0
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srand(s)
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end
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it "raises a TypeError when passed nil" do
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-> { srand(nil) }.should raise_error(TypeError)
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end
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it "raises a TypeError when passed a String" do
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-> { srand("7") }.should raise_error(TypeError)
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end
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end
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describe "Kernel#srand" do
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it "needs to be reviewed for spec completeness"
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end
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