117 lines
2.8 KiB
Go
117 lines
2.8 KiB
Go
// Copyright 2022 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package mclock
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import "testing"
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// This test checks basic functionality of Alarm.
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func TestAlarm(t *testing.T) {
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clk := new(Simulated)
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clk.Run(20)
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a := NewAlarm(clk)
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a.Schedule(clk.Now() + 10)
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if recv(a.C()) {
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t.Fatal("Alarm fired before scheduled deadline")
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}
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if ntimers := clk.ActiveTimers(); ntimers != 1 {
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t.Fatal("clock has", ntimers, "active timers, want", 1)
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}
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clk.Run(5)
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if recv(a.C()) {
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t.Fatal("Alarm fired too early")
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}
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clk.Run(5)
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if !recv(a.C()) {
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t.Fatal("Alarm did not fire")
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}
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if recv(a.C()) {
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t.Fatal("Alarm fired twice")
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}
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if ntimers := clk.ActiveTimers(); ntimers != 0 {
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t.Fatal("clock has", ntimers, "active timers, want", 0)
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}
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a.Schedule(clk.Now() + 5)
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if recv(a.C()) {
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t.Fatal("Alarm fired before scheduled deadline when scheduling the second event")
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}
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clk.Run(5)
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if !recv(a.C()) {
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t.Fatal("Alarm did not fire when scheduling the second event")
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}
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if recv(a.C()) {
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t.Fatal("Alarm fired twice when scheduling the second event")
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}
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}
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// This test checks that scheduling an Alarm to an earlier time than the
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// one already scheduled works properly.
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func TestAlarmScheduleEarlier(t *testing.T) {
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clk := new(Simulated)
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clk.Run(20)
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a := NewAlarm(clk)
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a.Schedule(clk.Now() + 50)
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clk.Run(5)
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a.Schedule(clk.Now() + 1)
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clk.Run(3)
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if !recv(a.C()) {
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t.Fatal("Alarm did not fire")
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}
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}
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// This test checks that scheduling an Alarm to a later time than the
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// one already scheduled works properly.
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func TestAlarmScheduleLater(t *testing.T) {
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clk := new(Simulated)
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clk.Run(20)
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a := NewAlarm(clk)
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a.Schedule(clk.Now() + 50)
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clk.Run(5)
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a.Schedule(clk.Now() + 100)
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clk.Run(50)
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if !recv(a.C()) {
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t.Fatal("Alarm did not fire")
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}
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}
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// This test checks that scheduling an Alarm in the past makes it fire immediately.
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func TestAlarmNegative(t *testing.T) {
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clk := new(Simulated)
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clk.Run(50)
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a := NewAlarm(clk)
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a.Schedule(-1)
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clk.Run(1) // needed to process timers
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if !recv(a.C()) {
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t.Fatal("Alarm did not fire for negative time")
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}
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}
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func recv(ch <-chan struct{}) bool {
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select {
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case <-ch:
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return true
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default:
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return false
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}
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}
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