44 lines
1.4 KiB
Ruby
44 lines
1.4 KiB
Ruby
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describe VCD do
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it "Outputs VCD files" do
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a=Port.new(1)
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b=Port.new(1)
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gate=XorGate.new(a,b)
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vcd=VCD.new("vcd_test.vcd")
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obj=double()
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allow(obj).to receive(:puts)
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allow(obj).to receive(:close)
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vcd.fd=obj
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`rm vcd_test.vcd`
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vcd.attach(a,"a")
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vcd.attach(b,"b")
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vcd.attach(gate.out, "out")
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expect(obj).to receive(:puts).with("$scope module TOP $end")
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expect(obj).to receive(:puts).with("$var wire 1 a a $end")
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expect(obj).to receive(:puts).with("$var wire 1 b b $end")
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expect(obj).to receive(:puts).with("$var wire 1 c out $end")
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expect(obj).to receive(:puts).with("$upscope $end")
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expect(obj).to receive(:puts).with("$enddefinitions $end")
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expect(obj).to receive(:puts).with("$dumpvars")
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expect(obj).to receive(:puts).with("0a")
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expect(obj).to receive(:puts).with("0b")
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expect(obj).to receive(:puts).with("0c")
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expect(obj).to receive(:puts).with("$end")
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expect(obj).to receive(:puts).with("#0")
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vcd.start
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expect(obj).to receive(:puts).with("1a")
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expect(obj).to receive(:puts).with("1c")
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a.setval(1)
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expect(obj).to receive(:puts).with("#1")
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vcd.advance(1)
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expect(obj).to receive(:puts).with("1b")
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expect(obj).to receive(:puts).with("0c")
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b.setval(1)
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expect(obj).to receive(:puts).with("#2")
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vcd.advance(1)
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expect(obj).to receive(:puts).with("0a")
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expect(obj).to receive(:puts).with("1c")
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a.setval(0)
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vcd.stop
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end
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end
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