package testutil import ( "reflect" "sort" "testing" "time" "github.com/google/go-cmp/cmp" "github.com/google/go-cmp/cmp/cmpopts" "github.com/influxdata/telegraf" "github.com/influxdata/telegraf/metric" ) type metricDiff struct { Measurement string Tags []*telegraf.Tag Fields []*telegraf.Field Type telegraf.ValueType Time time.Time } func lessFunc(lhs, rhs *metricDiff) bool { if lhs.Measurement != rhs.Measurement { return lhs.Measurement < rhs.Measurement } for i := 0; ; i++ { if i >= len(lhs.Tags) && i >= len(rhs.Tags) { break } else if i >= len(lhs.Tags) { return true } else if i >= len(rhs.Tags) { return false } if lhs.Tags[i].Key != rhs.Tags[i].Key { return lhs.Tags[i].Key < rhs.Tags[i].Key } if lhs.Tags[i].Value != rhs.Tags[i].Value { return lhs.Tags[i].Value < rhs.Tags[i].Value } } for i := 0; ; i++ { if i >= len(lhs.Fields) && i >= len(rhs.Fields) { break } else if i >= len(lhs.Fields) { return true } else if i >= len(rhs.Fields) { return false } if lhs.Fields[i].Key != rhs.Fields[i].Key { return lhs.Fields[i].Key < rhs.Fields[i].Key } if lhs.Fields[i].Value != rhs.Fields[i].Value { ltype := reflect.TypeOf(lhs.Fields[i].Value) rtype := reflect.TypeOf(lhs.Fields[i].Value) if ltype.Kind() != rtype.Kind() { return ltype.Kind() < rtype.Kind() } switch v := lhs.Fields[i].Value.(type) { case int64: return v < lhs.Fields[i].Value.(int64) case uint64: return v < lhs.Fields[i].Value.(uint64) case float64: return v < lhs.Fields[i].Value.(float64) case string: return v < lhs.Fields[i].Value.(string) case bool: return !v default: panic("unknown type") } } } if lhs.Type != rhs.Type { return lhs.Type < rhs.Type } if lhs.Time.UnixNano() != rhs.Time.UnixNano() { return lhs.Time.UnixNano() < rhs.Time.UnixNano() } return false } func newMetricDiff(metric telegraf.Metric) *metricDiff { if metric == nil { return nil } m := &metricDiff{} m.Measurement = metric.Name() for _, tag := range metric.TagList() { m.Tags = append(m.Tags, tag) } sort.Slice(m.Tags, func(i, j int) bool { return m.Tags[i].Key < m.Tags[j].Key }) for _, field := range metric.FieldList() { m.Fields = append(m.Fields, field) } sort.Slice(m.Fields, func(i, j int) bool { return m.Fields[i].Key < m.Fields[j].Key }) m.Type = metric.Type() m.Time = metric.Time() return m } // SortMetrics enables sorting metrics before comparison. func SortMetrics() cmp.Option { return cmpopts.SortSlices(lessFunc) } // IgnoreTime disables comparison of timestamp. func IgnoreTime() cmp.Option { return cmpopts.IgnoreFields(metricDiff{}, "Time") } // MetricEqual returns true if the metrics are equal. func MetricEqual(expected, actual telegraf.Metric) bool { var lhs, rhs *metricDiff if expected != nil { lhs = newMetricDiff(expected) } if actual != nil { rhs = newMetricDiff(actual) } return cmp.Equal(lhs, rhs) } // RequireMetricEqual halts the test with an error if the metrics are not // equal. func RequireMetricEqual(t *testing.T, expected, actual telegraf.Metric, opts ...cmp.Option) { t.Helper() var lhs, rhs *metricDiff if expected != nil { lhs = newMetricDiff(expected) } if actual != nil { rhs = newMetricDiff(actual) } if diff := cmp.Diff(lhs, rhs, opts...); diff != "" { t.Fatalf("telegraf.Metric\n--- expected\n+++ actual\n%s", diff) } } // RequireMetricsEqual halts the test with an error if the array of metrics // are not equal. func RequireMetricsEqual(t *testing.T, expected, actual []telegraf.Metric, opts ...cmp.Option) { t.Helper() lhs := make([]*metricDiff, 0, len(expected)) for _, m := range expected { lhs = append(lhs, newMetricDiff(m)) } rhs := make([]*metricDiff, 0, len(actual)) for _, m := range actual { rhs = append(rhs, newMetricDiff(m)) } if diff := cmp.Diff(lhs, rhs, opts...); diff != "" { t.Fatalf("[]telegraf.Metric\n--- expected\n+++ actual\n%s", diff) } } // Metric creates a new metric or panics on error. func MustMetric( name string, tags map[string]string, fields map[string]interface{}, tm time.Time, tp ...telegraf.ValueType, ) telegraf.Metric { m, err := metric.New(name, tags, fields, tm, tp...) if err != nil { panic("MustMetric") } return m } func FromTestMetric(met *Metric) telegraf.Metric { m, err := metric.New(met.Measurement, met.Tags, met.Fields, met.Time) if err != nil { panic("MustMetric") } return m }