// Copyright The Prometheus Authors

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

package textparse

import (

"fmt"

"io"

"testing"

"github.com/prometheus/common/model"

"github.com/stretchr/testify/require"

"github.com/prometheus/prometheus/model/labels"

)

// lbls is a helper for the readability of the expectations.

func typeAndUnitLabels(typeAndUnitEnabled bool, enabled, disabled labels.Labels) labels.Labels {

if typeAndUnitEnabled {

return enabled

}

return disabled

}

// todoDetectFamilySwitch exists because there's a known TODO that require dedicated PR and benchmarks for PROM-39.

// OM and Prom text format do NOT require TYPE, HELP or UNIT lines. This means that metric families can switch without

// those metadata entries e.g.:

// ```

// TYPE go_goroutines gauge

// go_goroutines 33 # previous metric

// different_metric_total 12 # <--- different family!

// ```

// The expected type for "different_metric_total" is obviously unknown type and unit, but it's surprisingly expensive and complex

// to reliably write parser for those cases. Two main issues:

// a. TYPE and UNIT are associated with "metric family" which is different than resulting metric name (e.g. histograms).

// b. You have to alloc additional entries to pair TYPE and UNIT with metric families they refer to (nit)

//

// This problem is elevated for PROM-39 feature.

//

// Current metadata handling is semi broken here for this as the (a) is expensive and currently not fully accurate

// see: https://github.com/prometheus/prometheus/blob/dbf5d01a62249eddcd202303069f6cf7dd3c4a73/scrape/scrape.go#L1916

//

// To iterate, we keep it "knowingly" broken behind the feature flag.

// TODO(bwplotka): Remove this once we fix the problematic case e.g.

// - introduce more accurate isSeriesPartOfFamily shared helper or even parser method that tells when new metric family starts

func todoDetectFamilySwitch(typeAndUnitEnabled bool, expected labels.Labels, brokenTypeInherited model.MetricType) labels.Labels {

if typeAndUnitEnabled && brokenTypeInherited != model.MetricTypeUnknown {

// Hack for now.

b := labels.NewBuilder(expected)

b.Set("__type__", string(brokenTypeInherited))

return b.Labels()

}

return expected

}

func TestPromParse(t *testing.T) {

input := `# HELP go_gc_duration_seconds A summary of the GC invocation durations.

# TYPE go_gc_duration_seconds summary

go_gc_duration_seconds{quantile="0"} 4.9351e-05

go_gc_duration_seconds{quantile="0.25",} 7.424100000000001e-05

go_gc_duration_seconds{quantile="0.5",a="b"} 8.3835e-05

go_gc_duration_seconds{quantile="0.8", a="b"} 8.3835e-05

go_gc_duration_seconds{ quantile="0.9", a="b"} 8.3835e-05

# HELP prometheus_http_request_duration_seconds Histogram of latencies for HTTP requests.

# TYPE prometheus_http_request_duration_seconds histogram

prometheus_http_request_duration_seconds_bucket{handler="/",le="1"} 423

prometheus_http_request_duration_seconds_bucket{handler="/",le="2"} 1423

prometheus_http_request_duration_seconds_bucket{handler="/",le="+Inf"} 1423

prometheus_http_request_duration_seconds_sum{handler="/"} 2000

prometheus_http_request_duration_seconds_count{handler="/"} 1423

# Hrandom comment starting with prefix of HELP

#

wind_speed{A="2",c="3"} 12345

# comment with escaped \n newline

# comment with escaped \ escape character

# HELP nohelp1

# HELP nohelp2

go_gc_duration_seconds{ quantile="1.0", a="b" } 8.3835e-05

go_gc_duration_seconds { quantile="1.0", a="b" } 8.3835e-05

go_gc_duration_seconds { quantile= "1.0", a= "b", } 8.3835e-05

go_gc_duration_seconds { quantile = "1.0", a = "b" } 8.3835e-05

go_gc_duration_seconds { quantile = "2.0" a = "b" } 8.3835e-05

go_gc_duration_seconds_count 99

some:aggregate:rate5m{a_b="c"} 1

# HELP go_goroutines Number of goroutines that currently exist.

# TYPE go_goroutines gauge

go_goroutines 33 123123

# TYPE some_counter_total counter

# HELP some_counter_total Help after type.

some_counter_total 12

# HELP nohelp3

_metric_starting_with_underscore 1

testmetric{_label_starting_with_underscore="foo"} 1

testmetric{label="\"bar\""} 1

testmetric{le="10"} 1

# HELP type_and_unit_test1 Type specified in metadata overrides.

# TYPE type_and_unit_test1 gauge

type_and_unit_test1{__type__="counter"} 123

# HELP type_and_unit_test2 Type specified in label.

type_and_unit_test2{__type__="counter"} 123`

input += "\n# HELP metric foo\x00bar"

input += "\nnull_byte_metric{a=\"abc\x00\"} 1"

for _, typeAndUnitEnabled := range []bool{false, true} {

t.Run(fmt.Sprintf("type-and-unit=%v", typeAndUnitEnabled), func(t *testing.T) {

exp := []parsedEntry{

{

m: "go_gc_duration_seconds",

help: "A summary of the GC invocation durations.",

},

{

m: "go_gc_duration_seconds",

typ: model.MetricTypeSummary,

},

{

m: `go_gc_duration_seconds{quantile="0"}`,

v: 4.9351e-05,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "go_gc_duration_seconds", "__type__", string(model.MetricTypeSummary), "quantile", "0.0"),

labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "0.0"),

),

},

{

m: `go_gc_duration_seconds{quantile="0.25",}`,

v: 7.424100000000001e-05,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "go_gc_duration_seconds", "__type__", string(model.MetricTypeSummary), "quantile", "0.25"),

labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "0.25"),

),

},

{

m: `go_gc_duration_seconds{quantile="0.5",a="b"}`,

v: 8.3835e-05,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "go_gc_duration_seconds", "__type__", string(model.MetricTypeSummary), "quantile", "0.5", "a", "b"),

labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "0.5", "a", "b"),

),

},

{

m: `go_gc_duration_seconds{quantile="0.8", a="b"}`,

v: 8.3835e-05,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "go_gc_duration_seconds", "__type__", string(model.MetricTypeSummary), "quantile", "0.8", "a", "b"),

labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "0.8", "a", "b"),

),

},

{

m: `go_gc_duration_seconds{ quantile="0.9", a="b"}`,

v: 8.3835e-05,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "go_gc_duration_seconds", "__type__", string(model.MetricTypeSummary), "quantile", "0.9", "a", "b"),

labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "0.9", "a", "b"),

),

},

{

m: "prometheus_http_request_duration_seconds",

help: "Histogram of latencies for HTTP requests.",

},

{

m: "prometheus_http_request_duration_seconds",

typ: model.MetricTypeHistogram,

},

{

m: `prometheus_http_request_duration_seconds_bucket{handler="/",le="1"}`,

v: 423,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_bucket", "__type__", string(model.MetricTypeHistogram), "handler", "/", "le", "1.0"),

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_bucket", "handler", "/", "le", "1.0"),

),

},

{

m: `prometheus_http_request_duration_seconds_bucket{handler="/",le="2"}`,

v: 1423,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_bucket", "__type__", string(model.MetricTypeHistogram), "handler", "/", "le", "2.0"),

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_bucket", "handler", "/", "le", "2.0"),

),

},

{

m: `prometheus_http_request_duration_seconds_bucket{handler="/",le="+Inf"}`,

v: 1423,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_bucket", "__type__", string(model.MetricTypeHistogram), "handler", "/", "le", "+Inf"),

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_bucket", "handler", "/", "le", "+Inf"),

),

},

{

m: `prometheus_http_request_duration_seconds_sum{handler="/"}`,

v: 2000,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_sum", "__type__", string(model.MetricTypeHistogram), "handler", "/"),

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_sum", "handler", "/"),

),

},

{

m: `prometheus_http_request_duration_seconds_count{handler="/"}`,

v: 1423,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_count", "__type__", string(model.MetricTypeHistogram), "handler", "/"),

labels.FromStrings("__name__", "prometheus_http_request_duration_seconds_count", "handler", "/"),

),

},

{

comment: "# Hrandom comment starting with prefix of HELP",

},

{

comment: "#",

},

{

m: `wind_speed{A="2",c="3"}`,

v: 12345,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

// NOTE(bwplotka): This is knowingly broken, inheriting old type when TYPE was not specified on a new metric.

// This was broken forever on a case for a broken exposition. Don't fix for now (expensive).

labels.FromStrings("A", "2", "__name__", "wind_speed", "__type__", string(model.MetricTypeHistogram), "c", "3"),

labels.FromStrings("A", "2", "__name__", "wind_speed", "c", "3"),

),

},

{

comment: "# comment with escaped \\n newline",

},

{

comment: "# comment with escaped \\ escape character",

},

{

m: "nohelp1",

help: "",

},

{

m: "nohelp2",

help: "",

},

{

m: `go_gc_duration_seconds{ quantile="1.0", a="b" }`,

v: 8.3835e-05,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "1.0", "a", "b"), model.MetricTypeHistogram),

},

{

m: `go_gc_duration_seconds { quantile="1.0", a="b" }`,

v: 8.3835e-05,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "1.0", "a", "b"), model.MetricTypeHistogram),

},

{

m: `go_gc_duration_seconds { quantile= "1.0", a= "b", }`,

v: 8.3835e-05,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "1.0", "a", "b"), model.MetricTypeHistogram),

},

{

m: `go_gc_duration_seconds { quantile = "1.0", a = "b" }`,

v: 8.3835e-05,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "1.0", "a", "b"), model.MetricTypeHistogram),

},

{

// NOTE: Unlike OpenMetrics, PromParser allows spaces between label terms. This appears to be unintended and should probably be fixed.

m: `go_gc_duration_seconds { quantile = "2.0" a = "b" }`,

v: 8.3835e-05,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "go_gc_duration_seconds", "quantile", "2.0", "a", "b"), model.MetricTypeHistogram),

},

{

m: `go_gc_duration_seconds_count`,

v: 99,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "go_gc_duration_seconds_count"), model.MetricTypeHistogram),

},

{

m: `some:aggregate:rate5m{a_b="c"}`,

v: 1,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "some:aggregate:rate5m", "a_b", "c"), model.MetricTypeHistogram),

},

{

m: "go_goroutines",

help: "Number of goroutines that currently exist.",

},

{

m: "go_goroutines",

typ: model.MetricTypeGauge,

},

{

m: `go_goroutines`,

v: 33,

t: int64p(123123),

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "go_goroutines", "__type__", string(model.MetricTypeGauge)),

labels.FromStrings("__name__", "go_goroutines"),

),

},

{

m: "some_counter_total",

typ: model.MetricTypeCounter,

},

{

m: "some_counter_total",

help: "Help after type.",

},

{

m: `some_counter_total`,

v: 12,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "some_counter_total", "__type__", string(model.MetricTypeCounter)),

labels.FromStrings("__name__", "some_counter_total"),

),

},

{

m: "nohelp3",

help: "",

},

{

m: "_metric_starting_with_underscore",

v: 1,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "_metric_starting_with_underscore"), model.MetricTypeCounter),

},

{

m: "testmetric{_label_starting_with_underscore=\"foo\"}",

v: 1,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "testmetric", "_label_starting_with_underscore", "foo"), model.MetricTypeCounter),

},

{

m: "testmetric{label=\"\\\"bar\\\"\"}",

v: 1,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "testmetric", "label", `"bar"`), model.MetricTypeCounter),

},

{

m: `testmetric{le="10"}`,

v: 1,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "testmetric", "le", "10"), model.MetricTypeCounter),

},

{

m: "type_and_unit_test1",

help: "Type specified in metadata overrides.",

},

{

m: "type_and_unit_test1",

typ: model.MetricTypeGauge,

},

{

m: "type_and_unit_test1{__type__=\"counter\"}",

v: 123,

lset: typeAndUnitLabels(

typeAndUnitEnabled,

labels.FromStrings("__name__", "type_and_unit_test1", "__type__", string(model.MetricTypeGauge)),

labels.FromStrings("__name__", "type_and_unit_test1", "__type__", string(model.MetricTypeCounter)),

),

},

{

m: "type_and_unit_test2",

help: "Type specified in label.",

},

{

m: "type_and_unit_test2{__type__=\"counter\"}",

v: 123,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "type_and_unit_test2", "__type__", string(model.MetricTypeCounter)), model.MetricTypeGauge),

},

{

m: "metric",

help: "foo\x00bar",

},

{

m: "null_byte_metric{a=\"abc\x00\"}",

v: 1,

lset: todoDetectFamilySwitch(typeAndUnitEnabled, labels.FromStrings("__name__", "null_byte_metric", "a", "abc\x00"), model.MetricTypeGauge),

},

}

p := NewPromParser([]byte(input), labels.NewSymbolTable(), typeAndUnitEnabled)

got := testParse(t, p)

requireEntries(t, exp, got)

})

}

}

func TestUTF8PromParse(t *testing.T) {

input := `# HELP "go.gc_duration_seconds" A summary of the GC invocation durations.

# TYPE "go.gc_duration_seconds" summary

{"go.gc_duration_seconds",quantile="0"} 4.9351e-05

{"go.gc_duration_seconds",quantile="0.25",} 7.424100000000001e-05

{"go.gc_duration_seconds",quantile="0.5",a="b"} 8.3835e-05

{"go.gc_duration_seconds",quantile="0.8", a="b"} 8.3835e-05

{"go.gc_duration_seconds", quantile="0.9", a="b"} 8.3835e-05

{"go.gc_duration_seconds", quantile="1.0", a="b" } 8.3835e-05

{ "go.gc_duration_seconds", quantile="1.0", a="b" } 8.3835e-05

{ "go.gc_duration_seconds", quantile= "1.0", a= "b", } 8.3835e-05

{ "go.gc_duration_seconds", quantile = "1.0", a = "b" } 8.3835e-05

{"go.gc_duration_seconds_count"} 99

{"Heizölrückstoßabdämpfung 10€ metric with \"interesting\" {character\nchoices}","strange©™\n'quoted' \"name\""="6"} 10.0`

exp := []parsedEntry{

{

m: "go.gc_duration_seconds",

help: "A summary of the GC invocation durations.",

}, {

m: "go.gc_duration_seconds",

typ: model.MetricTypeSummary,

}, {

m: `{"go.gc_duration_seconds",quantile="0"}`,

v: 4.9351e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "0.0"),

}, {

m: `{"go.gc_duration_seconds",quantile="0.25",}`,

v: 7.424100000000001e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "0.25"),

}, {

m: `{"go.gc_duration_seconds",quantile="0.5",a="b"}`,

v: 8.3835e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "0.5", "a", "b"),

}, {

m: `{"go.gc_duration_seconds",quantile="0.8", a="b"}`,

v: 8.3835e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "0.8", "a", "b"),

}, {

m: `{"go.gc_duration_seconds", quantile="0.9", a="b"}`,

v: 8.3835e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "0.9", "a", "b"),

}, {

m: `{"go.gc_duration_seconds", quantile="1.0", a="b" }`,

v: 8.3835e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "1.0", "a", "b"),

}, {

m: `{ "go.gc_duration_seconds", quantile="1.0", a="b" }`,

v: 8.3835e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "1.0", "a", "b"),

}, {

m: `{ "go.gc_duration_seconds", quantile= "1.0", a= "b", }`,

v: 8.3835e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "1.0", "a", "b"),

}, {

m: `{ "go.gc_duration_seconds", quantile = "1.0", a = "b" }`,

v: 8.3835e-05,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds", "quantile", "1.0", "a", "b"),

}, {

m: `{"go.gc_duration_seconds_count"}`,

v: 99,

lset: labels.FromStrings("__name__", "go.gc_duration_seconds_count"),

}, {

m: `{"Heizölrückstoßabdämpfung 10€ metric with \"interesting\" {character\nchoices}","strange©™\n'quoted' \"name\""="6"}`,

v: 10.0,

lset: labels.FromStrings("__name__", `Heizölrückstoßabdämpfung 10€ metric with "interesting" {character

choices}`, "strange©™\n'quoted' \"name\"", "6"),

},

}

p := NewPromParser([]byte(input), labels.NewSymbolTable(), false)

got := testParse(t, p)

requireEntries(t, exp, got)

}

func TestPromParseErrors(t *testing.T) {

cases := []struct {

input string

err string

}{

{

input: "a",

err: "expected value after metric, got \"\\n\" (\"INVALID\") while parsing: \"a\\n\"",

},

{

input: "a{b='c'} 1\n",

err: "expected label value, got \"'\" (\"INVALID\") while parsing: \"a{b='\"",

},

{

input: "a{b=\n",

err: "expected label value, got \"\\n\" (\"INVALID\") while parsing: \"a{b=\\n\"",

},

{

input: "a{\xff=\"foo\"} 1\n",

err: "expected label name, got \"\\xff\" (\"INVALID\") while parsing: \"a{\\xff\"",

},

{

input: "a{b=\"\xff\"} 1\n",

err: "invalid UTF-8 label value: \"\\\"\\xff\\\"\"",

},

{

input: `{"a", "b = "c"}`,

err: "expected equal, got \"c\\\"\" (\"LNAME\") while parsing: \"{\\\"a\\\", \\\"b = \\\"c\\\"\"",

},

{

input: `{"a",b\nc="d"} 1`,

err: "expected equal, got \"\\\\\" (\"INVALID\") while parsing: \"{\\\"a\\\",b\\\\\"",

},

{

input: "a true\n",

err: "strconv.ParseFloat: parsing \"true\": invalid syntax while parsing: \"a true\"",

},

{

input: "something_weird{problem=\"",

err: "expected label value, got \"\\\"\\n\" (\"INVALID\") while parsing: \"something_weird{problem=\\\"\\n\"",

},

{

input: "empty_label_name{=\"\"} 0",

err: "expected label name, got \"=\\\"\" (\"EQUAL\") while parsing: \"empty_label_name{=\\\"\"",

},

{

input: "{A}0",

err: "expected equal, got \"}0\" (\"BCLOSE\") while parsing: \"{A}0\"",

},

{

input: "foo 1_2\n",

err: "unsupported character in float while parsing: \"foo 1_2\"",

},

{

input: "foo 0x1p-3\n",

err: "unsupported character in float while parsing: \"foo 0x1p-3\"",

},

{

input: "foo 0x1P-3\n",

err: "unsupported character in float while parsing: \"foo 0x1P-3\"",

},

{

input: "foo 0 1_2\n",

err: "expected next entry after timestamp, got \"_\" (\"INVALID\") while parsing: \"foo 0 1_\"",

},

{

input: `{a="ok"} 1`,

err: "metric name not set while parsing: \"{a=\\\"ok\\\"} 1\"",

},

{

input: "# TYPE #\n#EOF\n",

err: "expected metric name after TYPE, got \"#\" (\"INVALID\") while parsing: \"# TYPE #\"",

},

{

input: "# HELP #\n#EOF\n",

err: "expected metric name after HELP, got \"#\" (\"INVALID\") while parsing: \"# HELP #\"",

},

}

for i, c := range cases {

p := NewPromParser([]byte(c.input), labels.NewSymbolTable(), false)

var err error

for err == nil {

_, err = p.Next()

}

require.EqualError(t, err, c.err, "test %d", i)

}

}

func TestPromParseBareIdentifierInBraces(t *testing.T) {

require.NotPanics(t, func() {

p := NewPromParser([]byte("{A} 0\n"), labels.NewSymbolTable(), false)

for {

et, err := p.Next()

if err != nil {

break

}

if et == EntrySeries {

var lset labels.Labels

p.Labels(&lset)

}

}

})

}

func TestPromNullByteHandling(t *testing.T) {

cases := []struct {

input string

err string

}{

{

input: "null_byte_metric{a=\"abc\x00\"} 1",

err: "",

},

{

input: "a{b=\"\x00ss\"} 1\n",

err: "",

},

{

input: "a{b=\"\x00\"} 1\n",

err: "",

},

{

input: "a{b=\"\x00\"} 1\n",

err: "",

},

{

input: "a{b=\x00\"ssss\"} 1\n",

err: "expected label value, got \"\\x00\" (\"INVALID\") while parsing: \"a{b=\\x00\"",

},

{

input: "a{b=\"\x00",

err: "expected label value, got \"\\\"\\x00\\n\" (\"INVALID\") while parsing: \"a{b=\\\"\\x00\\n\"",

},

{

input: "a{b\x00=\"hiih\"} 1",

err: "expected equal, got \"\\x00\" (\"INVALID\") while parsing: \"a{b\\x00\"",

},

{

input: "a\x00{b=\"ddd\"} 1",

err: "expected value after metric, got \"\\x00\" (\"INVALID\") while parsing: \"a\\x00\"",

},

{

input: "a 0 1\x00",

err: "expected next entry after timestamp, got \"\\x00\" (\"INVALID\") while parsing: \"a 0 1\\x00\"",

},

}

for i, c := range cases {

p := NewPromParser([]byte(c.input), labels.NewSymbolTable(), false)

var err error

for err == nil {

_, err = p.Next()

}

if c.err == "" {

require.Equal(t, io.EOF, err, "test %d", i)

continue

}

require.EqualError(t, err, c.err, "test %d", i)

}

}