Initialize the interval trigger (#259)

* Initialize the interval trigger

Without lastRotate initialized an interval trigger
will always trigger a rotation the first time its
callback is executed.

file/helper_other.go

@@ -42,8 +42,8 @@ func SyncParent(path string) error {
 	parent := filepath.Dir(path)
 	f, err := os.Open(parent)
 
-	//nolint:nilerr // ignore error
 	if err != nil {
+		//lint:ignore nilerr failing open is ok
 		return nil
 	}
 	defer f.Close()

file/rotator_test.go

@@ -173,7 +173,7 @@ func TestDailyRotation(t *testing.T) {
 		WriteMsg(t, r)
 	}
 
-	AssertDirContents(t, dir, logname+"-"+today+"-1.ndjson", logname+"-"+today+"-2.ndjson", logname+"-"+today+"-3.ndjson", logname+"-diagnostic-"+twoDaysAgo+".zip")
+	AssertDirContents(t, dir, logname+"-"+today+".ndjson", logname+"-"+today+"-1.ndjson", logname+"-"+today+"-2.ndjson", logname+"-diagnostic-"+twoDaysAgo+".zip")
 }
 
 // Tests the FileConfig.RotateOnStartup parameter

file/trigger.go

@@ -138,6 +138,8 @@ func newIntervalTrigger(interval time.Duration, clock clock) trigger {
 			return lastInterval != currentInterval
 		}
 	}
+
+	t.lastRotate = clock.Now()
 	return &t
 }
 

file/trigger_test.go

@@ -0,0 +1,136 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//go:build !windows
+
+package file
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestInitTrigger(t *testing.T) {
+	var trigger initTrigger
+	assert.Equal(t, trigger.TriggerRotation(0), rotateReasonInitializing)
+	assert.Equal(t, trigger.TriggerRotation(0), rotateReasonNoRotate)
+	assert.Equal(t, trigger.TriggerRotation(0), rotateReasonNoRotate)
+	assert.Equal(t, trigger.TriggerRotation(0), rotateReasonNoRotate)
+}
+
+func TestSizeTrigger(t *testing.T) {
+	trigger := sizeTrigger{
+		maxSizeBytes: 5,
+		size:         0,
+	}
+
+	assert.EqualValues(t, trigger.size, 0)
+	assert.Equal(t, trigger.TriggerRotation(1), rotateReasonNoRotate)
+	assert.EqualValues(t, trigger.size, 1)
+	assert.Equal(t, trigger.TriggerRotation(1), rotateReasonNoRotate)
+	assert.EqualValues(t, trigger.size, 2)
+	assert.Equal(t, trigger.TriggerRotation(1), rotateReasonNoRotate)
+	assert.EqualValues(t, trigger.size, 3)
+	assert.Equal(t, trigger.TriggerRotation(1), rotateReasonNoRotate)
+	assert.EqualValues(t, trigger.size, 4)
+	assert.Equal(t, trigger.TriggerRotation(1), rotateReasonNoRotate)
+	assert.EqualValues(t, trigger.size, 5)
+	assert.Equal(t, trigger.TriggerRotation(1), rotateReasonFileSize)
+	assert.EqualValues(t, trigger.size, 0)
+}
+
+type always20240615 struct{}
+
+func (always20240615) Now() time.Time {
+	return time.Date(2024, 06, 15, 12, 30, 30, 0, time.UTC)
+}
+
+func TestIntervalTrigger(t *testing.T) {
+	var ignored uint = 1
+
+	var testCases = []struct {
+		duration    string
+		afterSecond bool
+		afterMinute bool
+		afterHour   bool
+		afterDay    bool
+		afterWeek   bool
+		afterMonth  bool
+		afterYear   bool
+	}{
+		{"1s", true, true, true, true, true, true, true},
+		{"1m", false, true, true, true, true, true, true},
+		{"1h", false, false, true, true, true, true, true},
+		{"24h", false, false, false, true, true, true, true},
+		{"168h", false, false, false, false, true, true, true},    // week: 7 * 24 = 168
+		{"720h", false, false, false, false, false, true, true},   // month:30 * 24 = 720
+		{"8760h", false, false, false, false, false, false, true}, // year: 24 * 365 = 8760
+	}
+
+	clock := &always20240615{}
+
+	for _, testCase := range testCases {
+		duration, err := time.ParseDuration(testCase.duration)
+		assert.Nil(t, err)
+		genericTrigger := newIntervalTrigger(duration, clock)
+		trigger, ok := genericTrigger.(*intervalTrigger)
+		assert.True(t, ok)
+
+		// ensure lastRotate is initialized
+		assert.NotZero(t, trigger.lastRotate)
+
+		// Should not fire immediately
+		assert.Equal(t, trigger.TriggerRotation(ignored), rotateReasonNoRotate)
+
+		// Test after a second and ensure it doesn't fire immediately after
+		trigger.lastRotate = clock.Now().Add(time.Second * -1)
+		assert.Equal(t, trigger.TriggerRotation(ignored) == rotateReasonTimeInterval, testCase.afterSecond)
+		assert.Equal(t, trigger.TriggerRotation(ignored), rotateReasonNoRotate)
+
+		// Test after a minute and ensure it doesn't fire immediately after
+		trigger.lastRotate = clock.Now().Add(time.Minute * -1)
+		assert.Equal(t, trigger.TriggerRotation(ignored) == rotateReasonTimeInterval, testCase.afterMinute)
+		assert.Equal(t, trigger.TriggerRotation(ignored), rotateReasonNoRotate)
+
+		// Test after an hour and ensure it doesn't fire immediately after
+		trigger.lastRotate = clock.Now().Add(time.Hour * -1)
+		assert.Equal(t, trigger.TriggerRotation(ignored) == rotateReasonTimeInterval, testCase.afterHour)
+		assert.Equal(t, trigger.TriggerRotation(ignored), rotateReasonNoRotate)
+
+		// Test after a day and ensure it doesn't fire immediately after
+		trigger.lastRotate = clock.Now().Add(time.Hour * -24)
+		assert.Equal(t, trigger.TriggerRotation(ignored) == rotateReasonTimeInterval, testCase.afterDay)
+		assert.Equal(t, trigger.TriggerRotation(ignored), rotateReasonNoRotate)
+
+		// Test after a week and ensure it doesn't fire immediately after
+		trigger.lastRotate = clock.Now().Add(time.Hour * -24 * 7)
+		assert.Equal(t, trigger.TriggerRotation(ignored) == rotateReasonTimeInterval, testCase.afterWeek)
+		assert.Equal(t, trigger.TriggerRotation(ignored), rotateReasonNoRotate)
+
+		// Test after a month and ensure it doesn't fire immediately after
+		trigger.lastRotate = clock.Now().Add(time.Hour * -24 * 31)
+		assert.Equal(t, trigger.TriggerRotation(ignored) == rotateReasonTimeInterval, testCase.afterMonth)
+		assert.Equal(t, trigger.TriggerRotation(ignored), rotateReasonNoRotate)
+
+		// Test after a year and ensure it doesn't fire immediately after
+		trigger.lastRotate = clock.Now().Add(time.Hour * -24 * 365)
+		assert.Equal(t, trigger.TriggerRotation(ignored) == rotateReasonTimeInterval, testCase.afterYear)
+		assert.Equal(t, trigger.TriggerRotation(ignored), rotateReasonNoRotate)
+	}
+}