Add test for documented fields check for metricsets without a http in…

…put (#17334)

* add test for documented fields

* changelog

* work on test

* add test for testdata

* fmt update

CHANGELOG.next.asciidoc

@@ -289,6 +289,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Release vsphere module as GA. {issue}15798[15798] {pull}17119[17119]
 - Add Storage metricsets to GCP module {pull}15598[15598]
 - Added documentation for running Metricbeat in Cloud Foundry. {pull}17275[17275]
+- Add test for documented fields check for metricsets without a http input. {issue}17315[17315] {pull}17334[17334]
 - Add final tests and move label to GA for the azure module in metricbeat. {pull}17319[17319]
 
 *Packetbeat*

metricbeat/mb/testing/testdata.go

@@ -171,6 +171,22 @@ func TestDataFilesWithConfig(t *testing.T, module, metricSet string, config Data
 	}
 }
 
+// TestMetricsetFieldsDocumented checks metricset fields are documented from metricsets that cannot run `TestDataFiles` test which contains this check
+func TestMetricsetFieldsDocumented(t *testing.T, metricSet mb.MetricSet, events []mb.Event) {
+	var data []common.MapStr
+	for _, e := range events {
+		beatEvent := StandardizeEvent(metricSet, e, mb.AddMetricSetInfo)
+		data = append(data, beatEvent.Fields)
+	}
+
+	if err := checkDocumented(data, nil); err != nil {
+		t.Errorf("%v: check if fields are documented in `metricbeat/%s/%s/_meta/fields.yml` "+
+			"file or run 'make update' on Metricbeat folder to update fields in `metricbeat/fields.yml`",
+			err, metricSet.Module().Name(), metricSet.Name())
+	}
+
+}
+
 func runTest(t *testing.T, file string, module, metricSetName string, config DataConfig) {
 	// starts a server serving the given file under the given url
 	s := server(t, file, config.URL)
@@ -215,7 +231,7 @@ func runTest(t *testing.T, file string, module, metricSetName string, config Dat
 		return h1 < h2
 	})
 
-	if err := checkDocumented(t, data, config.OmitDocumentedFieldsCheck); err != nil {
+	if err := checkDocumented(data, config.OmitDocumentedFieldsCheck); err != nil {
 		t.Errorf("%v: check if fields are documented in `metricbeat/%s/%s/_meta/fields.yml` "+
 			"file or run 'make update' on Metricbeat folder to update fields in `metricbeat/fields.yml`",
 			err, module, metricSetName)
@@ -300,7 +316,7 @@ func writeDataJSON(t *testing.T, data common.MapStr, path string) {
 }
 
 // checkDocumented checks that all fields which show up in the events are documented
-func checkDocumented(t *testing.T, data []common.MapStr, omitFields []string) error {
+func checkDocumented(data []common.MapStr, omitFields []string) error {
 	fieldsData, err := asset.GetFields("metricbeat")
 	if err != nil {
 		return err
@@ -310,7 +326,6 @@ func checkDocumented(t *testing.T, data []common.MapStr, omitFields []string) er
 	if err != nil {
 		return err
 	}
-
 	documentedFields := fields.GetKeys()
 	keys := map[string]interface{}{}
 
@@ -350,12 +365,19 @@ func documentedFieldCheck(foundKeys common.MapStr, knownKeys map[string]interfac
 			if found {
 				continue
 			}
-
-			// last case `status_codes.*`:
+			// case `status_codes.*`:
 			prefix := strings.Join(splits[0:len(splits)-1], ".")
 			if _, ok := knownKeys[prefix+".*"]; ok {
 				continue
 			}
+			// should cover scenarios as status_codes.*.*` and `azure.compute_vm_scaleset.*.*`
+			if len(splits) > 2 {
+				prefix = strings.Join(splits[0:len(splits)-2], ".")
+				if _, ok := knownKeys[prefix+".*.*"]; ok {
+					continue
+				}
+			}
+
 			return errors.Errorf("field missing '%s'", foundKey)
 		}
 	}

metricbeat/mb/testing/testdata_test.go

@@ -20,6 +20,8 @@ package testing
 import (
 	"testing"
 
+	"github.com/elastic/beats/v7/libbeat/common"
+
 	"github.com/stretchr/testify/assert"
 )
 
@@ -40,3 +42,46 @@ func TestOmitDocumentedField(t *testing.T) {
 		assert.Equal(t, tt.result, result)
 	}
 }
+
+func TestDocumentedFieldCheck(t *testing.T) {
+	foundKeys := common.MapStr{
+		"hello":               "hello",
+		"elasticsearch.stats": "stats1",
+	}
+	omitfields := []string{
+		"hello",
+	}
+	knownKeys := map[string]interface{}{
+		"elasticsearch.stats": "key1",
+	}
+	err := documentedFieldCheck(foundKeys, knownKeys, omitfields)
+	//error should be nil, as `hello` field is ignored and `elasticsearch.stats` field is defined
+	assert.NoError(t, err)
+
+	foundKeys = common.MapStr{
+		"elasticsearch.stats.cpu":              "stats2",
+		"elasticsearch.metrics.requests.count": "requests2",
+	}
+
+	knownKeys = map[string]interface{}{
+		"elasticsearch.stats.*":     "key1",
+		"elasticsearch.metrics.*.*": "hello1",
+	}
+	// error should be nil as the foundKeys are covered by the `prefix` cases
+	err = documentedFieldCheck(foundKeys, knownKeys, omitfields)
+	assert.NoError(t, err)
+
+	foundKeys = common.MapStr{
+		"elasticsearch.stats.cpu":              "stats2",
+		"elasticsearch.metrics.requests.count": "requests2",
+	}
+
+	knownKeys = map[string]interface{}{
+		"elasticsearch.*":         "key1",
+		"elasticsearch.metrics.*": "hello1",
+	}
+	// error should not be nil as the foundKeys are not covered by the `prefix` cases
+	err = documentedFieldCheck(foundKeys, knownKeys, omitfields)
+	assert.Error(t, err, "field missing 'elasticsearch.stats.cpu'")
+
+}

x-pack/metricbeat/module/azure/compute_vm/compute_vm_integration_test.go

@@ -25,8 +25,7 @@ func TestFetchMetricset(t *testing.T) {
 		t.Fatalf("Expected 0 error, had %d. %v\n", len(errs), errs)
 	}
 	assert.NotEmpty(t, events)
-	test.TestFieldsDocumentation(t, events)
-
+	mbtest.TestMetricsetFieldsDocumented(t, metricSet, events)
 }
 
 func TestData(t *testing.T) {

x-pack/metricbeat/module/azure/compute_vm_scaleset/compute_vm_scaleset_integration_test.go

@@ -25,7 +25,7 @@ func TestFetchMetricset(t *testing.T) {
 		t.Fatalf("Expected 0 error, had %d. %v\n", len(errs), errs)
 	}
 	assert.NotEmpty(t, events)
-	test.TestFieldsDocumentation(t, events)
+	mbtest.TestMetricsetFieldsDocumented(t, metricSet, events)
 }
 
 func TestData(t *testing.T) {

x-pack/metricbeat/module/azure/container_instance/container_instance_integration_test.go

@@ -28,7 +28,7 @@ func TestFetchMetricset(t *testing.T) {
 		t.Fatalf("Expected 0 error, had %d. %v\n", len(errs), errs)
 	}
 	assert.NotEmpty(t, events)
-	test.TestFieldsDocumentation(t, events)
+	mbtest.TestMetricsetFieldsDocumented(t, metricSet, events)
 }
 
 func TestData(t *testing.T) {

x-pack/metricbeat/module/azure/container_registry/container_registry_integration_test.go

@@ -28,7 +28,7 @@ func TestFetchMetricset(t *testing.T) {
 		t.Fatalf("Expected 0 error, had %d. %v\n", len(errs), errs)
 	}
 	assert.NotEmpty(t, events)
-	test.TestFieldsDocumentation(t, events)
+	mbtest.TestMetricsetFieldsDocumented(t, metricSet, events)
 }
 
 func TestData(t *testing.T) {

x-pack/metricbeat/module/azure/container_service/container_service_integration_test.go

@@ -28,7 +28,7 @@ func TestFetchMetricset(t *testing.T) {
 		t.Fatalf("Expected 0 error, had %d. %v\n", len(errs), errs)
 	}
 	assert.NotEmpty(t, events)
-	test.TestFieldsDocumentation(t, events)
+	mbtest.TestMetricsetFieldsDocumented(t, metricSet, events)
 }
 
 func TestData(t *testing.T) {

x-pack/metricbeat/module/azure/database_account/database_account_integration_test.go

@@ -25,7 +25,7 @@ func TestFetchMetricset(t *testing.T) {
 		t.Fatalf("Expected 0 error, had %d. %v\n", len(errs), errs)
 	}
 	assert.NotEmpty(t, events)
-	test.TestFieldsDocumentation(t, events)
+	mbtest.TestMetricsetFieldsDocumented(t, metricSet, events)
 }
 
 func TestData(t *testing.T) {

x-pack/metricbeat/module/azure/monitor/monitor_integration_test.go

@@ -25,7 +25,7 @@ func TestFetchMetricset(t *testing.T) {
 		t.Fatalf("Expected 0 error, had %d. %v\n", len(errs), errs)
 	}
 	assert.NotEmpty(t, events)
-	test.TestFieldsDocumentation(t, events)
+	mbtest.TestMetricsetFieldsDocumented(t, metricSet, events)
 }
 
 func TestData(t *testing.T) {

x-pack/metricbeat/module/azure/storage/storage_integration_test.go

@@ -25,7 +25,7 @@ func TestFetchMetricset(t *testing.T) {
 		t.Fatalf("Expected 0 error, had %d. %v\n", len(errs), errs)
 	}
 	assert.NotEmpty(t, events)
-	test.TestFieldsDocumentation(t, events)
+	mbtest.TestMetricsetFieldsDocumented(t, metricSet, events)
 }
 
 func TestData(t *testing.T) {

x-pack/metricbeat/module/azure/test/integration.go

@@ -5,13 +5,8 @@
 package test
 
 import (
-	"errors"
 	"os"
 	"testing"
-
-	"github.com/stretchr/testify/assert"
-
-	"github.com/elastic/beats/v7/metricbeat/mb"
 )
 
 // GetConfig function gets azure credentials for integration tests.
@@ -45,68 +40,3 @@ func GetConfig(t *testing.T, metricSetName string) map[string]interface{} {
 		"subscription_id":       subId,
 	}
 }
-
-// TestFieldsDocumentation func checks if all the documented fields have the expected type
-func TestFieldsDocumentation(t *testing.T, events []mb.Event) {
-	for _, event := range events {
-		// RootField
-		checkIsDocumented("service.name", "string", event, t)
-		checkIsDocumented("cloud.provider", "string", event, t)
-		checkIsDocumented("cloud.region", "string", event, t)
-		checkIsDocumented("cloud.instance.name", "string", event, t)
-		checkIsDocumented("cloud.instance.id", "string", event, t)
-
-		// MetricSetField
-		checkIsDocumented("azure.timegrain", "string", event, t)
-		checkIsDocumented("azure.subscription_id", "string", event, t)
-		checkIsDocumented("azure.namespace", "string", event, t)
-		checkIsDocumented("azure.resource.type", "string", event, t)
-		checkIsDocumented("azure.resource.group", "string", event, t)
-	}
-}
-
-// checkIsDocumented function checks a given field type and compares it with the expected type for integration tests.
-// this implementation is only temporary, will be replaced by issue https://github.com/elastic/beats/issues/17315
-func checkIsDocumented(metricName string, expectedType string, event mb.Event, t *testing.T) {
-	t.Helper()
-
-	ok1, err1 := event.MetricSetFields.HasKey(metricName)
-	ok2, err2 := event.RootFields.HasKey(metricName)
-	if ok1 || ok2 {
-		if ok1 {
-			assert.NoError(t, err1)
-			metricValue, err := event.MetricSetFields.GetValue(metricName)
-			assert.NoError(t, err)
-			err = compareType(metricValue, expectedType, metricName)
-			assert.NoError(t, err)
-			t.Log("Succeed: Field " + metricName + " matches type " + expectedType)
-		} else if ok2 {
-			assert.NoError(t, err2)
-			rootValue, err := event.RootFields.GetValue(metricName)
-			assert.NoError(t, err)
-			err = compareType(rootValue, expectedType, metricName)
-			assert.NoError(t, err)
-			t.Log("Succeed: Field " + metricName + " matches type " + expectedType)
-		}
-	} else {
-		t.Log("Field " + metricName + " does not exist in metric set fields")
-	}
-}
-
-func compareType(metricValue interface{}, expectedType string, metricName string) (err error) {
-	switch metricValue.(type) {
-	case float64:
-		if expectedType != "float" {
-			err = errors.New("Failed: Field " + metricName + " is not in type " + expectedType)
-		}
-	case string:
-		if expectedType != "string" {
-			err = errors.New("Failed: Field " + metricName + " is not in type " + expectedType)
-		}
-	case int64:
-		if expectedType != "int" {
-			err = errors.New("Failed: Field " + metricName + " is not in type " + expectedType)
-		}
-	}
-	return
-}