// Copyright 2018 The Prometheus Authors // Licensed 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. package collector import ( "context" "testing" "github.com/DATA-DOG/go-sqlmock" "github.com/prometheus/client_golang/prometheus" dto "github.com/prometheus/client_model/go" "github.com/prometheus/common/promslog" "github.com/smartystreets/goconvey/convey" ) func TestScrapeEngineInnodbStatus(t *testing.T) { db, mock, err := sqlmock.New() if err != nil { t.Fatalf("error opening a stub database connection: %s", err) } defer db.Close() sample := ` ===================================== 2016-09-14 19:04:38 0x7fed21462700 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 30 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 1 srv_active, 0 srv_shutdown, 49166 srv_idle srv_master_thread log flush and writes: 49165 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 15 OS WAIT ARRAY INFO: signal count 12 RW-shared spins 0, rounds 4, OS waits 2 RW-excl spins 0, rounds 0, OS waits 0 RW-sx spins 0, rounds 0, OS waits 0 Spin rounds per wait: 4.00 RW-shared, 0.00 RW-excl, 0.00 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 67843 Purge done for trx's n:o < 55764 undo n:o < 0 state: running but idle History list length 779 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 422131596298608, not started 0 lock struct(s), heap size 1136, 0 row lock(s) -------- FILE I/O -------- I/O thread 0 state: waiting for completed aio requests (insert buffer thread) I/O thread 1 state: waiting for completed aio requests (log thread) I/O thread 2 state: waiting for completed aio requests (read thread) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (write thread) I/O thread 7 state: waiting for completed aio requests (write thread) I/O thread 8 state: waiting for completed aio requests (write thread) I/O thread 9 state: waiting for completed aio requests (write thread) Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] , ibuf aio reads:, log i/o's:, sync i/o's: Pending flushes (fsync) log: 0; buffer pool: 0 512 OS file reads, 57 OS file writes, 8 OS fsyncs 0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 0, seg size 2, 0 merges merged operations: insert 0, delete mark 0, delete 0 discarded operations: insert 0, delete mark 0, delete 0 Hash table size 34673, node heap has 0 buffer(s) Hash table size 34673, node heap has 0 buffer(s) Hash table size 34673, node heap has 0 buffer(s) Hash table size 34673, node heap has 0 buffer(s) Hash table size 34673, node heap has 0 buffer(s) Hash table size 34673, node heap has 0 buffer(s) Hash table size 34673, node heap has 0 buffer(s) Hash table size 34673, node heap has 0 buffer(s) 0.00 hash searches/s, 0.00 non-hash searches/s --- LOG --- Log sequence number 37771171 Log flushed up to 37771171 Pages flushed up to 37771171 Last checkpoint at 37771162 Max checkpoint age 80826164 Checkpoint age target 78300347 Modified age 0 Checkpoint age 9 0 pending log flushes, 0 pending chkp writes 10 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 139722752 Dictionary memory allocated 367821 Internal hash tables (constant factor + variable factor) Adaptive hash index 2252736 (2219072 + 33664) Page hash 139112 (buffer pool 0 only) Dictionary cache 922589 (554768 + 367821) File system 839328 (812272 + 27056) Lock system 334008 (332872 + 1136) Recovery system 0 (0 + 0) Buffer pool size 8191 Buffer pool size, bytes 0 Free buffers 7684 Database pages 507 Old database pages 0 Modified db pages 0 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 0, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 473, created 34, written 36 0.00 reads/s, 0.00 creates/s, 0.00 writes/s No buffer pool page gets since the last printout Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 507, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 661 queries inside InnoDB, 10 queries in queue 15 read views open inside InnoDB 0 RW transactions active inside InnoDB Process ID=1, Main thread ID=140656308950784, state: sleeping Number of rows inserted 0, updated 0, deleted 0, read 12 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================ ` columns := []string{"Type", "Name", "Status"} rows := sqlmock.NewRows(columns).AddRow("InnoDB", "", sample) mock.ExpectQuery(sanitizeQuery(engineInnodbStatusQuery)).WillReturnRows(rows) inst := &instance{db: db} ch := make(chan prometheus.Metric) go func() { if err = (ScrapeEngineInnodbStatus{}).Scrape(context.Background(), inst, ch, promslog.NewNopLogger()); err != nil { t.Errorf("error calling function on test: %s", err) } close(ch) }() metricsExpected := []MetricResult{ {labels: labelMap{}, value: 661, metricType: dto.MetricType_GAUGE}, {labels: labelMap{}, value: 10, metricType: dto.MetricType_GAUGE}, {labels: labelMap{}, value: 15, metricType: dto.MetricType_GAUGE}, } convey.Convey("Metrics comparison", t, func() { for _, expect := range metricsExpected { got := readMetric(<-ch) convey.So(got, convey.ShouldResemble, expect) } }) // Ensure all SQL queries were executed if err := mock.ExpectationsWereMet(); err != nil { t.Errorf("there were unfulfilled exceptions: %s", err) } }