139 lines
4.7 KiB
Go
139 lines
4.7 KiB
Go
// Copyright 2019 The Prometheus Authors
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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 promql
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import (
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"io/ioutil"
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"os"
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"regexp"
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"testing"
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)
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func TestQueryLogging(t *testing.T) {
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fileAsBytes := make([]byte, 4096)
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queryLogger := ActiveQueryTracker{
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mmapedFile: fileAsBytes,
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logger: nil,
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getNextIndex: make(chan int, 4),
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}
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queryLogger.generateIndices(4)
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veryLongString := "MassiveQueryThatNeverEndsAndExceedsTwoHundredBytesWhichIsTheSizeOfEntrySizeAndShouldThusBeTruncatedAndIamJustGoingToRepeatTheSameCharactersAgainProbablyBecauseWeAreStillOnlyHalfWayDoneOrMaybeNotOrMaybeMassiveQueryThatNeverEndsAndExceedsTwoHundredBytesWhichIsTheSizeOfEntrySizeAndShouldThusBeTruncatedAndIamJustGoingToRepeatTheSameCharactersAgainProbablyBecauseWeAreStillOnlyHalfWayDoneOrMaybeNotOrMaybeMassiveQueryThatNeverEndsAndExceedsTwoHundredBytesWhichIsTheSizeOfEntrySizeAndShouldThusBeTruncatedAndIamJustGoingToRepeatTheSameCharactersAgainProbablyBecauseWeAreStillOnlyHalfWayDoneOrMaybeNotOrMaybeMassiveQueryThatNeverEndsAndExceedsTwoHundredBytesWhichIsTheSizeOfEntrySizeAndShouldThusBeTruncatedAndIamJustGoingToRepeatTheSameCharactersAgainProbablyBecauseWeAreStillOnlyHalfWayDoneOrMaybeNotOrMaybeMassiveQueryThatNeverEndsAndExceedsTwoHundredBytesWhichIsTheSizeOfEntrySizeAndShouldThusBeTruncatedAndIamJustGoingToRepeatTheSameCharactersAgainProbablyBecauseWeAreStillOnlyHalfWayDoneOrMaybeNotOrMaybe"
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queries := []string{
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"TestQuery",
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veryLongString,
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"",
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"SpecialCharQuery{host=\"2132132\", id=123123}",
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}
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want := []string{
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`^{"query":"TestQuery","timestamp_sec":\d+}\x00*,$`,
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`^{"query":"` + trimStringByBytes(veryLongString, entrySize-40) + `","timestamp_sec":\d+}\x00*,$`,
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`^{"query":"","timestamp_sec":\d+}\x00*,$`,
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`^{"query":"SpecialCharQuery{host=\\"2132132\\", id=123123}","timestamp_sec":\d+}\x00*,$`,
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}
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// Check for inserts of queries.
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for i := 0; i < 4; i++ {
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start := 1 + i*entrySize
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end := start + entrySize
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queryLogger.Insert(queries[i])
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have := string(fileAsBytes[start:end])
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if !regexp.MustCompile(want[i]).MatchString(have) {
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t.Fatalf("Query not written correctly: %s.\nHave %s\nWant %s", queries[i], have, want[i])
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}
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}
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// Check if all queries have been deleted.
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for i := 0; i < 4; i++ {
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queryLogger.Delete(1 + i*entrySize)
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}
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if !regexp.MustCompile(`^\x00+$`).Match(fileAsBytes[1 : 1+entrySize*4]) {
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t.Fatalf("All queries not deleted properly. Have %s\nWant only null bytes \\x00", string(fileAsBytes[1:1+entrySize*4]))
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}
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}
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func TestIndexReuse(t *testing.T) {
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queryBytes := make([]byte, 1+3*entrySize)
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queryLogger := ActiveQueryTracker{
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mmapedFile: queryBytes,
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logger: nil,
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getNextIndex: make(chan int, 3),
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}
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queryLogger.generateIndices(3)
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queryLogger.Insert("TestQuery1")
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queryLogger.Insert("TestQuery2")
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queryLogger.Insert("TestQuery3")
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queryLogger.Delete(1 + entrySize)
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queryLogger.Delete(1)
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newQuery2 := "ThisShouldBeInsertedAtIndex2"
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newQuery1 := "ThisShouldBeInsertedAtIndex1"
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queryLogger.Insert(newQuery2)
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queryLogger.Insert(newQuery1)
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want := []string{
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`^{"query":"ThisShouldBeInsertedAtIndex1","timestamp_sec":\d+}\x00*,$`,
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`^{"query":"ThisShouldBeInsertedAtIndex2","timestamp_sec":\d+}\x00*,$`,
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`^{"query":"TestQuery3","timestamp_sec":\d+}\x00*,$`,
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}
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// Check all bytes and verify new query was inserted at index 2
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for i := 0; i < 3; i++ {
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start := 1 + i*entrySize
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end := start + entrySize
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have := queryBytes[start:end]
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if !regexp.MustCompile(want[i]).Match(have) {
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t.Fatalf("Index not reused properly:\nHave %s\nWant %s", string(queryBytes[start:end]), want[i])
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}
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}
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}
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func TestMMapFile(t *testing.T) {
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file, err := ioutil.TempFile("", "mmapedFile")
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if err != nil {
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t.Fatalf("Couldn't create temp test file. %s", err)
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}
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filename := file.Name()
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defer os.Remove(filename)
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fileAsBytes, err := getMMapedFile(filename, 2, nil)
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if err != nil {
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t.Fatalf("Couldn't create test mmaped file")
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}
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copy(fileAsBytes, "ab")
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f, err := os.Open(filename)
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if err != nil {
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t.Fatalf("Couldn't open test mmaped file")
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}
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bytes := make([]byte, 4)
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n, err := f.Read(bytes)
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if n != 2 || err != nil {
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t.Fatalf("Error reading file")
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}
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if string(bytes[:2]) != string(fileAsBytes) {
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t.Fatalf("Mmap failed")
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}
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}
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