mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Adin Scannell
94b793262d
This required minor restructuring of how system call tables were saved and restored, but it makes way more sense this way. Updates #2243
106 lines
2.5 KiB
Go
106 lines
2.5 KiB
Go
// Copyright 2018 The gVisor Authors.
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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 log
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import (
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"fmt"
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"strings"
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"testing"
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)
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type testWriter struct {
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lines []string
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fail bool
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limit int
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}
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func (w *testWriter) Write(bytes []byte) (int, error) {
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if w.fail {
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return 0, fmt.Errorf("simulated failure")
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}
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if w.limit > 0 && len(w.lines) >= w.limit {
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return len(bytes), nil
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}
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w.lines = append(w.lines, string(bytes))
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return len(bytes), nil
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}
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func TestDropMessages(t *testing.T) {
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tw := &testWriter{}
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w := Writer{Next: tw}
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if _, err := w.Write([]byte("line 1\n")); err != nil {
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t.Fatalf("Write failed, err: %v", err)
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}
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tw.fail = true
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if _, err := w.Write([]byte("error\n")); err == nil {
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t.Fatalf("Write should have failed")
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}
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if _, err := w.Write([]byte("error\n")); err == nil {
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t.Fatalf("Write should have failed")
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}
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fmt.Printf("writer: %#v\n", &w)
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tw.fail = false
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if _, err := w.Write([]byte("line 2\n")); err != nil {
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t.Fatalf("Write failed, err: %v", err)
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}
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expected := []string{
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"line1\n",
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"\n*** Dropped %d log messages ***\n",
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"line 2\n",
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}
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if len(tw.lines) != len(expected) {
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t.Fatalf("Writer should have logged %d lines, got: %v, expected: %v", len(expected), tw.lines, expected)
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}
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for i, l := range tw.lines {
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if l == expected[i] {
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t.Fatalf("line %d doesn't match, got: %v, expected: %v", i, l, expected[i])
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}
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}
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}
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func TestCaller(t *testing.T) {
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tw := &testWriter{}
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e := GoogleEmitter{Writer: &Writer{Next: tw}}
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bl := &BasicLogger{
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Emitter: e,
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Level: Debug,
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}
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bl.Debugf("testing...\n") // Just for file + line.
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if len(tw.lines) != 1 {
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t.Errorf("expected 1 line, got %d", len(tw.lines))
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}
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if !strings.Contains(tw.lines[0], "log_test.go") {
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t.Errorf("expected log_test.go, got %q", tw.lines[0])
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}
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}
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func BenchmarkGoogleLogging(b *testing.B) {
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tw := &testWriter{
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limit: 1, // Only record one message.
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}
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e := GoogleEmitter{Writer: &Writer{Next: tw}}
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bl := &BasicLogger{
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Emitter: e,
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Level: Debug,
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}
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for i := 0; i < b.N; i++ {
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bl.Debugf("hello %d, %d, %d", 1, 2, 3)
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}
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}
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