mirror of https://github.com/status-im/nim-eth.git
72 lines
2.6 KiB
Nim
72 lines
2.6 KiB
Nim
# Copyright (c) 2021 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.used.}
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import
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chronos,
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unittest2,
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../../eth/utp/clock_drift_calculator
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suite "Clock drift calculator":
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test "Initial clock drift should be 0":
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let currentTime = Moment.now()
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let calculator = ClockDriftCalculator.init(currentTime)
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check:
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calculator.clockDrift == 0
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test "Adding samples should not update averages if 5s did not pass":
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let currentTime = Moment.now()
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var calculator = ClockDriftCalculator.init(currentTime)
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calculator.addSample(10, currentTime + seconds(1))
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calculator.addSample(10, currentTime + seconds(2))
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check:
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calculator.clockDrift == 0
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calculator.lastClockDrift == 0
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test "Clock drift should be calculated in relation to first sample":
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let currentTime = Moment.now()
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var calculator = ClockDriftCalculator.init(currentTime)
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# first sample which will be treated as a base sample
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calculator.addSample(10, currentTime + seconds(3))
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# second sample in the first interval it will be treated in relation to first one
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# so correct first drift should be: (50 - 10) / 2 == 20
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calculator.addSample(50, currentTime + seconds(6))
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check:
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calculator.clockDrift == 2
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calculator.lastClockDrift == 20
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test "Clock drift should properly calculated when clock drifts to two sides":
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let currentTime = Moment.now()
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var calculator1 = ClockDriftCalculator.init(currentTime)
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var calculator2 = ClockDriftCalculator.init(currentTime)
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# first sample which will be treated as a base sample
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calculator1.addSample(10, currentTime + seconds(3))
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# second sample in the first inteval it will be treated in relation to first one
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# so correct first drift should be: (50 - 10) / 2 == 20
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calculator1.addSample(50, currentTime + seconds(6))
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# first sample which will be treated as a base sample
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calculator2.addSample(50, currentTime + seconds(3))
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# second sample in the first inteval it will be treated in relation to first one
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# so correct first drift should be: (10 - 50) / 2 == -20
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calculator2.addSample(10, currentTime + seconds(6))
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check:
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calculator1.clockDrift == -calculator2.clockDrift
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calculator1.lastClockDrift == -calculator2.lastClockDrift
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