PMM-7 fix tests and a small improvement. (#720)

* PMM-7 fix tests and a small improvement.

* PMM-7 use docker compose v2.

* PMM-7 add extra wait.

* PMM-7 stabilize tests.

.github/workflows/go.yml

@@ -41,5 +41,6 @@ jobs:
       - name: Test
         run: |
           TEST_MONGODB_IMAGE=${{ matrix.image }} make test-cluster
+          sleep 10
           make test-race
           make test-cluster-clean

Makefile

@@ -104,7 +104,7 @@ test-race: env              ## Run all tests with race flag.
 	go test -race -v -timeout 30s ./...
 
 test-cluster: env           ## Starts MongoDB test cluster. Use env var TEST_MONGODB_IMAGE to set flavor and version. Example: TEST_MONGODB_IMAGE=mongo:3.6 make test-cluster
-	docker-compose up -d
+	docker compose up -d --wait
 
 test-cluster-clean: env     ## Stops MongoDB test cluster.
-	docker-compose down --remove-orphans
+	docker compose down --remove-orphans

exporter/currentop_collector_test.go

@@ -31,7 +31,7 @@ import (
 )
 
 func TestCurrentopCollector(t *testing.T) {
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
 
 	var wg sync.WaitGroup
@@ -48,7 +48,7 @@ func TestCurrentopCollector(t *testing.T) {
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
-		for i := 0; i < 3; i++ {
+		for i := 0; i < 300; i++ {
 			coll := fmt.Sprintf("testcol_%02d", i)
 			_, err := database.Collection(coll).InsertOne(ctx, bson.M{"f1": 1, "f2": "2"})
 			assert.NoError(t, err)

exporter/v1_compatibility.go

@@ -971,7 +971,7 @@ func replSetMetrics(m bson.M) []prometheus.Metric {
 	for _, m := range repl.Members {
 		if m.StateStr == "PRIMARY" {
 			primaryOpTime = m.OptimeDate.Time()
-			gotPrimary = true
+			gotPrimary = !primaryOpTime.IsZero()
 
 			break
 		}