func GetMetricForFingerprintTests(p metric.Persistence, t test.Tester) { testAppendSamples(p, &clientmodel.Sample{ Value: 0, Timestamp: 0, Metric: clientmodel.Metric{ "request_type": "your_mom", }, }, t) testAppendSamples(p, &clientmodel.Sample{ Value: 0, Timestamp: 0, Metric: clientmodel.Metric{ "request_type": "your_dad", "one-off": "value", }, }, t) result, err := p.GetFingerprintsForLabelMatchers(metric.LabelMatchers{{ Type: metric.Equal, Name: "request_type", Value: "your_mom", }}) if err != nil { t.Error(err) } if len(result) != 1 { t.Errorf("Expected one element.") } m, err := p.GetMetricForFingerprint(result[0]) if err != nil { t.Error(err) } if m == nil { t.Fatal("Did not expect nil.") } if len(m) != 1 { t.Errorf("Expected one-dimensional metric.") } if m["request_type"] != "your_mom" { t.Errorf("Expected metric to match.") } result, err = p.GetFingerprintsForLabelMatchers(metric.LabelMatchers{{ Type: metric.Equal, Name: "request_type", Value: "your_dad", }}) if err != nil { t.Error(err) } if len(result) != 1 { t.Errorf("Expected one element.") } m, err = p.GetMetricForFingerprint(result[0]) if m == nil { t.Fatal("Did not expect nil.") } if err != nil { t.Error(err) } if len(m) != 2 { t.Errorf("Expected two-dimensional metric.") } if m["request_type"] != "your_dad" { t.Errorf("Expected metric to match.") } if m["one-off"] != "value" { t.Errorf("Expected metric to match.") } // Verify that mutating a returned metric does not result in the mutated // metric to be returned at the next GetMetricForFingerprint() call. m["one-off"] = "new value" m, err = p.GetMetricForFingerprint(result[0]) if m == nil { t.Fatal("Did not expect nil.") } if err != nil { t.Error(err) } if len(m) != 2 { t.Errorf("Expected two-dimensional metric.") } if m["request_type"] != "your_dad" { t.Errorf("Expected metric to match.") } if m["one-off"] != "value" { t.Errorf("Expected metric to match.") } }