alertmanager/pkg/labels/parse_test.go

// Copyright 2018 Prometheus Team
// 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 labels

import (
	"reflect"
	"testing"
)

func TestMatchers(t *testing.T) {
	testCases := []struct {
		input string
		want  []*Matcher
		err   string
	}{
		{
			input: `{foo="bar"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				return append(ms, m)
			}(),
		},
		{
			input: `{foo=~"bar.*"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchRegexp, "foo", "bar.*")
				return append(ms, m)
			}(),
		},
		{
			input: `{foo!="bar"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchNotEqual, "foo", "bar")
				return append(ms, m)
			}(),
		},
		{
			input: `{foo!~"bar.*"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchNotRegexp, "foo", "bar.*")
				return append(ms, m)
			}(),
		},
		{
			input: `{foo="bar", baz!="quux"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				m2, _ := NewMatcher(MatchNotEqual, "baz", "quux")
				return append(ms, m, m2)
			}(),
		},
		{
			input: `{foo="bar", baz!~"quux.*"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				m2, _ := NewMatcher(MatchNotRegexp, "baz", "quux.*")
				return append(ms, m, m2)
			}(),
		},
		{
			input: `{foo="bar",baz!~".*quux", derp="wat"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				m2, _ := NewMatcher(MatchNotRegexp, "baz", ".*quux")
				m3, _ := NewMatcher(MatchEqual, "derp", "wat")
				return append(ms, m, m2, m3)
			}(),
		},
		{
			input: `{foo="bar", baz!="quux", derp="wat"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				m2, _ := NewMatcher(MatchNotEqual, "baz", "quux")
				m3, _ := NewMatcher(MatchEqual, "derp", "wat")
				return append(ms, m, m2, m3)
			}(),
		},
		{
			input: `{foo="bar", baz!~".*quux.*", derp="wat"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				m2, _ := NewMatcher(MatchNotRegexp, "baz", ".*quux.*")
				m3, _ := NewMatcher(MatchEqual, "derp", "wat")
				return append(ms, m, m2, m3)
			}(),
		},
		{
			input: `{foo="bar", instance=~"some-api.*"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				m2, _ := NewMatcher(MatchRegexp, "instance", "some-api.*")
				return append(ms, m, m2)
			}(),
		},
		{
			input: `{foo=""}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "")
				return append(ms, m)
			}(),
		},
		{
			input: `{foo="bar,quux", job="job1"}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar,quux")
				m2, _ := NewMatcher(MatchEqual, "job", "job1")
				return append(ms, m, m2)
			}(),
		},
		{
			input: `{foo = "bar", dings != "bums", }`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				m2, _ := NewMatcher(MatchNotEqual, "dings", "bums")
				return append(ms, m, m2)
			}(),
		},
		{
			input: `foo=bar,dings!=bums`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "foo", "bar")
				m2, _ := NewMatcher(MatchNotEqual, "dings", "bums")
				return append(ms, m, m2)
			}(),
		},
		{
			input: `{quote="She said: \"Hi, ladies! That's gender-neutral…\""}`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "quote", `She said: "Hi, ladies! That's gender-neutral…"`)
				return append(ms, m)
			}(),
		},
		{
			input: `statuscode=~"5.."`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchRegexp, "statuscode", "5..")
				return append(ms, m)
			}(),
		},
		{
			input: `tricky=~~~`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchRegexp, "tricky", "~~")
				return append(ms, m)
			}(),
		},
		{
			input: `trickier==\\=\=\""`,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchEqual, "trickier", `=\=\="`)
				return append(ms, m)
			}(),
		},
		{
			input: `contains_quote != "\"" , contains_comma !~ "foo,bar" , `,
			want: func() []*Matcher {
				ms := []*Matcher{}
				m, _ := NewMatcher(MatchNotEqual, "contains_quote", `"`)
				m2, _ := NewMatcher(MatchNotRegexp, "contains_comma", "foo,bar")
				return append(ms, m, m2)
			}(),
		},
		{
			input: `contains_unescaped_quote = foo"bar`,
			err:   `matcher value contains unescaped double quote: foo"bar`,
		},
		{
			input: `{invalid-name = "valid label"}`,
			err:   `bad matcher format: invalid-name = "valid label"`,
		},
		{
			input: `{foo=~"invalid[regexp"}`,
			err:   "error parsing regexp: missing closing ]: `[regexp)$`",
		},
	}

	for i, tc := range testCases {
		got, err := ParseMatchers(tc.input)
		if err != nil && tc.err == "" {
			t.Fatalf("got error where none expected (i=%d): %v", i, err)
		}
		if err == nil && tc.err != "" {
			t.Fatalf("expected error but got none (i=%d): %v", i, tc.err)
		}
		if err != nil && err.Error() != tc.err {
			t.Fatalf("error not equal (i=%d):\ngot  %v\nwant %v", i, err, tc.err)
		}
		if !reflect.DeepEqual(got, tc.want) {
			t.Fatalf("labels not equal (i=%d):\ngot  %v\nwant %v", i, got, tc.want)
		}
	}

}