100 lines
2.3 KiB
Go
100 lines
2.3 KiB
Go
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package interrupt
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import (
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"testing"
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)
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type countingReceiver struct {
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interrupts int
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}
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// NotifyInterrupt implements Receiver.NotifyInterrupt.
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func (r *countingReceiver) NotifyInterrupt() {
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r.interrupts++
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}
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func TestSingleInterruptBeforeEnable(t *testing.T) {
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var (
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f Forwarder
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r countingReceiver
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)
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f.NotifyInterrupt()
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// The interrupt should cause the first Enable to fail.
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if f.Enable(&r) {
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f.Disable()
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t.Fatalf("Enable: got true, wanted false")
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}
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// The failing Enable "acknowledges" the interrupt, allowing future Enables
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// to succeed.
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if !f.Enable(&r) {
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t.Fatalf("Enable: got false, wanted true")
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}
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f.Disable()
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}
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func TestMultipleInterruptsBeforeEnable(t *testing.T) {
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var (
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f Forwarder
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r countingReceiver
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)
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f.NotifyInterrupt()
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f.NotifyInterrupt()
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// The interrupts should cause the first Enable to fail.
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if f.Enable(&r) {
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f.Disable()
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t.Fatalf("Enable: got true, wanted false")
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}
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// Interrupts are deduplicated while the Forwarder is disabled, so the
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// failing Enable "acknowledges" all interrupts, allowing future Enables to
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// succeed.
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if !f.Enable(&r) {
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t.Fatalf("Enable: got false, wanted true")
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}
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f.Disable()
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}
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func TestSingleInterruptAfterEnable(t *testing.T) {
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var (
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f Forwarder
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r countingReceiver
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)
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if !f.Enable(&r) {
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t.Fatalf("Enable: got false, wanted true")
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}
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defer f.Disable()
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f.NotifyInterrupt()
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if r.interrupts != 1 {
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t.Errorf("interrupts: got %d, wanted 1", r.interrupts)
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}
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}
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func TestMultipleInterruptsAfterEnable(t *testing.T) {
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var (
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f Forwarder
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r countingReceiver
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)
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if !f.Enable(&r) {
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t.Fatalf("Enable: got false, wanted true")
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}
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defer f.Disable()
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f.NotifyInterrupt()
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f.NotifyInterrupt()
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if r.interrupts != 2 {
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t.Errorf("interrupts: got %d, wanted 2", r.interrupts)
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}
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}
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