package strings import ( "testing" "time" "github.com/influxdata/telegraf" "github.com/influxdata/telegraf/metric" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) func newM1() telegraf.Metric { m1, _ := metric.New("IIS_log", map[string]string{ "verb": "GET", "s-computername": "MIXEDCASE_hostname", }, map[string]interface{}{ "request": "/mixed/CASE/paTH/?from=-1D&to=now", "whitespace": " whitespace\t", }, time.Now(), ) return m1 } func newM2() telegraf.Metric { m2, _ := metric.New("IIS_log", map[string]string{ "verb": "GET", "resp_code": "200", "s-computername": "MIXEDCASE_hostname", }, map[string]interface{}{ "request": "/mixed/CASE/paTH/?from=-1D&to=now", "cs-host": "AAAbbb", "ignore_number": int64(200), "ignore_bool": true, }, time.Now(), ) return m2 } func TestFieldConversions(t *testing.T) { tests := []struct { name string plugin *Strings check func(t *testing.T, actual telegraf.Metric) }{ { name: "Should change existing field to lowercase", plugin: &Strings{ Lowercase: []converter{ { Field: "request", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "/mixed/case/path/?from=-1d&to=now", fv) }, }, { name: "Should change existing field to uppercase", plugin: &Strings{ Uppercase: []converter{ { Field: "request", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "/MIXED/CASE/PATH/?FROM=-1D&TO=NOW", fv) }, }, { name: "Should add new lowercase field", plugin: &Strings{ Lowercase: []converter{ { Field: "request", Dest: "lowercase_request", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "/mixed/CASE/paTH/?from=-1D&to=now", fv) fv, ok = actual.GetField("lowercase_request") require.True(t, ok) require.Equal(t, "/mixed/case/path/?from=-1d&to=now", fv) }, }, { name: "Should trim from both sides", plugin: &Strings{ Trim: []converter{ { Field: "request", Cutset: "/w", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "mixed/CASE/paTH/?from=-1D&to=no", fv) }, }, { name: "Should trim from both sides and make lowercase", plugin: &Strings{ Trim: []converter{ { Field: "request", Cutset: "/w", }, }, Lowercase: []converter{ { Field: "request", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "mixed/case/path/?from=-1d&to=no", fv) }, }, { name: "Should trim from left side", plugin: &Strings{ TrimLeft: []converter{ { Field: "request", Cutset: "/w", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "mixed/CASE/paTH/?from=-1D&to=now", fv) }, }, { name: "Should trim from right side", plugin: &Strings{ TrimRight: []converter{ { Field: "request", Cutset: "/w", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "/mixed/CASE/paTH/?from=-1D&to=no", fv) }, }, { name: "Should trim prefix '/mixed'", plugin: &Strings{ TrimPrefix: []converter{ { Field: "request", Prefix: "/mixed", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "/CASE/paTH/?from=-1D&to=now", fv) }, }, { name: "Should trim suffix '-1D&to=now'", plugin: &Strings{ TrimSuffix: []converter{ { Field: "request", Suffix: "-1D&to=now", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "/mixed/CASE/paTH/?from=", fv) }, }, { name: "Trim without cutset removes whitespace", plugin: &Strings{ Trim: []converter{ { Field: "whitespace", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("whitespace") require.True(t, ok) require.Equal(t, "whitespace", fv) }, }, { name: "Trim left without cutset removes whitespace", plugin: &Strings{ TrimLeft: []converter{ { Field: "whitespace", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("whitespace") require.True(t, ok) require.Equal(t, "whitespace\t", fv) }, }, { name: "Trim right without cutset removes whitespace", plugin: &Strings{ TrimRight: []converter{ { Field: "whitespace", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("whitespace") require.True(t, ok) require.Equal(t, " whitespace", fv) }, }, { name: "No change if field missing", plugin: &Strings{ Lowercase: []converter{ { Field: "xyzzy", Suffix: "-1D&to=now", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { fv, ok := actual.GetField("request") require.True(t, ok) require.Equal(t, "/mixed/CASE/paTH/?from=-1D&to=now", fv) }, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { metrics := tt.plugin.Apply(newM1()) require.Len(t, metrics, 1) tt.check(t, metrics[0]) }) } } func TestTagConversions(t *testing.T) { tests := []struct { name string plugin *Strings check func(t *testing.T, actual telegraf.Metric) }{ { name: "Should change existing tag to lowercase", plugin: &Strings{ Lowercase: []converter{ { Tag: "s-computername", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { tv, ok := actual.GetTag("verb") require.True(t, ok) require.Equal(t, "GET", tv) tv, ok = actual.GetTag("s-computername") require.True(t, ok) require.Equal(t, "mixedcase_hostname", tv) }, }, { name: "Should add new lowercase tag", plugin: &Strings{ Lowercase: []converter{ { Tag: "s-computername", Dest: "s-computername_lowercase", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { tv, ok := actual.GetTag("verb") require.True(t, ok) require.Equal(t, "GET", tv) tv, ok = actual.GetTag("s-computername") require.True(t, ok) require.Equal(t, "MIXEDCASE_hostname", tv) tv, ok = actual.GetTag("s-computername_lowercase") require.True(t, ok) require.Equal(t, "mixedcase_hostname", tv) }, }, { name: "Should add new uppercase tag", plugin: &Strings{ Uppercase: []converter{ { Tag: "s-computername", Dest: "s-computername_uppercase", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { tv, ok := actual.GetTag("verb") require.True(t, ok) require.Equal(t, "GET", tv) tv, ok = actual.GetTag("s-computername") require.True(t, ok) require.Equal(t, "MIXEDCASE_hostname", tv) tv, ok = actual.GetTag("s-computername_uppercase") require.True(t, ok) require.Equal(t, "MIXEDCASE_HOSTNAME", tv) }, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { metrics := tt.plugin.Apply(newM1()) require.Len(t, metrics, 1) tt.check(t, metrics[0]) }) } } func TestMeasurementConversions(t *testing.T) { tests := []struct { name string plugin *Strings check func(t *testing.T, actual telegraf.Metric) }{ { name: "lowercase measurement", plugin: &Strings{ Lowercase: []converter{ { Measurement: "IIS_log", }, }, }, check: func(t *testing.T, actual telegraf.Metric) { name := actual.Name() require.Equal(t, "iis_log", name) }, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { metrics := tt.plugin.Apply(newM1()) require.Len(t, metrics, 1) tt.check(t, metrics[0]) }) } } func TestMultipleConversions(t *testing.T) { plugin := &Strings{ Lowercase: []converter{ { Tag: "s-computername", }, { Field: "request", }, { Field: "cs-host", Dest: "cs-host_lowercase", }, }, Uppercase: []converter{ { Tag: "verb", }, }, } processed := plugin.Apply(newM2()) expectedFields := map[string]interface{}{ "request": "/mixed/case/path/?from=-1d&to=now", "ignore_number": int64(200), "ignore_bool": true, "cs-host": "AAAbbb", "cs-host_lowercase": "aaabbb", } expectedTags := map[string]string{ "verb": "GET", "resp_code": "200", "s-computername": "mixedcase_hostname", } assert.Equal(t, expectedFields, processed[0].Fields()) assert.Equal(t, expectedTags, processed[0].Tags()) } func TestReadmeExample(t *testing.T) { plugin := &Strings{ Lowercase: []converter{ { Tag: "uri_stem", }, }, TrimPrefix: []converter{ { Tag: "uri_stem", Prefix: "/api/", }, }, Uppercase: []converter{ { Field: "cs-host", Dest: "cs-host_normalised", }, }, } m, _ := metric.New("iis_log", map[string]string{ "verb": "get", "uri_stem": "/API/HealthCheck", }, map[string]interface{}{ "cs-host": "MIXEDCASE_host", "referrer": "-", "ident": "-", "http_version": "1.1", "agent": "UserAgent", "resp_bytes": int64(270), }, time.Now(), ) processed := plugin.Apply(m) expectedTags := map[string]string{ "verb": "get", "uri_stem": "healthcheck", } expectedFields := map[string]interface{}{ "cs-host": "MIXEDCASE_host", "cs-host_normalised": "MIXEDCASE_HOST", "referrer": "-", "ident": "-", "http_version": "1.1", "agent": "UserAgent", "resp_bytes": int64(270), } assert.Equal(t, expectedFields, processed[0].Fields()) assert.Equal(t, expectedTags, processed[0].Tags()) } func newMetric(name string) telegraf.Metric { tags := map[string]string{} fields := map[string]interface{}{} m, _ := metric.New(name, tags, fields, time.Now()) return m } func TestMeasurementReplace(t *testing.T) { plugin := &Strings{ Replace: []converter{ { Old: "_", New: "-", Measurement: "*", }, }, } metrics := []telegraf.Metric{ newMetric("foo:some_value:bar"), newMetric("average:cpu:usage"), newMetric("average_cpu_usage"), } results := plugin.Apply(metrics...) assert.Equal(t, "foo:some-value:bar", results[0].Name(), "`_` was not changed to `-`") assert.Equal(t, "average:cpu:usage", results[1].Name(), "Input name should have been unchanged") assert.Equal(t, "average-cpu-usage", results[2].Name(), "All instances of `_` should have been changed to `-`") } func TestMeasurementCharDeletion(t *testing.T) { plugin := &Strings{ Replace: []converter{ { Old: "foo", New: "", Measurement: "*", }, }, } metrics := []telegraf.Metric{ newMetric("foo:bar:baz"), newMetric("foofoofoo"), newMetric("barbarbar"), } results := plugin.Apply(metrics...) assert.Equal(t, ":bar:baz", results[0].Name(), "Should have deleted the initial `foo`") assert.Equal(t, "foofoofoo", results[1].Name(), "Should have refused to delete the whole string") assert.Equal(t, "barbarbar", results[2].Name(), "Should not have changed the input") }