package rules import ( "fmt" "github.com/prometheus/prometheus/rules/ast" "github.com/prometheus/prometheus/storage/metric/leveldb" "io/ioutil" "os" "strings" "testing" ) var testEvalTime = testStartTime.Add(testDuration5m * 10) // Expected output needs to be alphabetically sorted (labels within one line // must be sorted and lines between each other must be sorted too). var expressionTests = []struct { expr string output []string shouldFail bool }{ { expr: "SUM(http_requests)", output: []string{"http_requests{} => 3600 @[%v]"}, }, { expr: "SUM(http_requests) BY (job)", output: []string{ "http_requests{job='api-server'} => 1000 @[%v]", "http_requests{job='app-server'} => 2600 @[%v]", }, }, { expr: "SUM(http_requests) BY (job, group)", output: []string{ "http_requests{group='canary',job='api-server'} => 700 @[%v]", "http_requests{group='canary',job='app-server'} => 1500 @[%v]", "http_requests{group='production',job='api-server'} => 300 @[%v]", "http_requests{group='production',job='app-server'} => 1100 @[%v]", }, }, { expr: "AVG(http_requests) BY (job)", output: []string{ "http_requests{job='api-server'} => 250 @[%v]", "http_requests{job='app-server'} => 650 @[%v]", }, }, { expr: "MIN(http_requests) BY (job)", output: []string{ "http_requests{job='api-server'} => 100 @[%v]", "http_requests{job='app-server'} => 500 @[%v]", }, }, { expr: "MAX(http_requests) BY (job)", output: []string{ "http_requests{job='api-server'} => 400 @[%v]", "http_requests{job='app-server'} => 800 @[%v]", }, }, { expr: "SUM(http_requests) BY (job) - count(http_requests)", output: []string{ "http_requests{job='api-server'} => 992 @[%v]", "http_requests{job='app-server'} => 2592 @[%v]", }, }, { expr: "SUM(http_requests) BY (job) - 2", output: []string{ "http_requests{job='api-server'} => 998 @[%v]", "http_requests{job='app-server'} => 2598 @[%v]", }, }, { expr: "SUM(http_requests) BY (job) % 3", output: []string{ "http_requests{job='api-server'} => 1 @[%v]", "http_requests{job='app-server'} => 2 @[%v]", }, }, { expr: "SUM(http_requests) BY (job) / 0", output: []string{ "http_requests{job='api-server'} => +Inf @[%v]", "http_requests{job='app-server'} => +Inf @[%v]", }, }, { expr: "SUM(http_requests) BY (job) > 1000", output: []string{ "http_requests{job='app-server'} => 2600 @[%v]", }, }, { expr: "SUM(http_requests) BY (job) <= 1000", output: []string{ "http_requests{job='api-server'} => 1000 @[%v]", }, }, { expr: "SUM(http_requests) BY (job) != 1000", output: []string{ "http_requests{job='app-server'} => 2600 @[%v]", }, }, { expr: "SUM(http_requests) BY (job) == 1000", output: []string{ "http_requests{job='api-server'} => 1000 @[%v]", }, }, { expr: "SUM(http_requests) BY (job) + SUM(http_requests) BY (job)", output: []string{ "http_requests{job='api-server'} => 2000 @[%v]", "http_requests{job='app-server'} => 5200 @[%v]", }, }, { expr: "delta(http_requests[25m], 1)", output: []string{ "http_requests{group='canary',instance='0',job='api-server'} => 150 @[%v]", "http_requests{group='canary',instance='0',job='app-server'} => 350 @[%v]", "http_requests{group='canary',instance='1',job='api-server'} => 200 @[%v]", "http_requests{group='canary',instance='1',job='app-server'} => 400 @[%v]", "http_requests{group='production',instance='0',job='api-server'} => 50 @[%v]", "http_requests{group='production',instance='0',job='app-server'} => 250 @[%v]", "http_requests{group='production',instance='1',job='api-server'} => 100 @[%v]", "http_requests{group='production',instance='1',job='app-server'} => 300 @[%v]", }, // Invalid expressions that should fail to parse. }, { expr: "", shouldFail: true, }, { expr: "1 - http_requests", shouldFail: true, }, { expr: "http_requests['1m']", shouldFail: true, }, } func annotateWithTime(lines []string) []string { annotatedLines := []string{} for _, line := range lines { annotatedLines = append(annotatedLines, fmt.Sprintf(line, testEvalTime)) } return annotatedLines } func vectorComparisonString(expected []string, actual []string) string { separator := "\n--------------\n" return fmt.Sprintf("Expected:%v%v%v\nActual:%v%v%v ", separator, strings.Join(expected, "\n"), separator, separator, strings.Join(actual, "\n"), separator) } func TestExpressions(t *testing.T) { temporaryDirectory, err := ioutil.TempDir("", "leveldb_metric_persistence_test") if err != nil { t.Errorf("Could not create temporary directory: %q\n", err) return } defer func() { if err = os.RemoveAll(temporaryDirectory); err != nil { t.Errorf("Could not remove temporary directory: %q\n", err) } }() persistence, err := leveldb.NewLevelDBMetricPersistence(temporaryDirectory) if err != nil { t.Errorf("Could not create LevelDB Metric Persistence: %q\n", err) return } if persistence == nil { t.Errorf("Received nil LevelDB Metric Persistence.\n") return } defer func() { persistence.Close() }() storeMatrix(persistence, testMatrix) ast.SetPersistence(persistence, nil) for _, exprTest := range expressionTests { expectedLines := annotateWithTime(exprTest.output) testExpr, err := LoadExprFromString(exprTest.expr) if err != nil { if exprTest.shouldFail { continue } t.Errorf("Error during parsing: %v", err) t.Errorf("Expression: %v", exprTest.expr) } else { failed := false resultStr := ast.EvalToString(testExpr, &testEvalTime, ast.TEXT) resultLines := strings.Split(resultStr, "\n") if len(exprTest.output) != len(resultLines) { t.Errorf("Number of samples in expected and actual output don't match") failed = true } for _, expectedSample := range expectedLines { found := false for _, actualSample := range resultLines { if actualSample == expectedSample { found = true } } if !found { t.Errorf("Couldn't find expected sample in output: '%v'", expectedSample) failed = true } } if failed { t.Errorf("Expression: %v\n%v", exprTest.expr, vectorComparisonString(expectedLines, resultLines)) } } } }