| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package selectorcore |
| 4 | |
| 5 | import ( |
| 6 | "testing" |
| 7 | |
| 8 | "github.com/stretchr/testify/assert" |
| 9 | "github.com/stretchr/testify/require" |
| 10 | ) |
| 11 | |
| 12 | type mapLabels map[string]string |
| 13 | |
| 14 | func (m mapLabels) Get(key string) (string, bool) { |
| 15 | v, ok := m[key] |
| 16 | return v, ok |
| 17 | } |
| 18 | |
| 19 | func TestParseScenarios(t *testing.T) { |
| 20 | tests := map[string]struct { |
| 21 | expr string |
| 22 | metric string |
| 23 | labels mapLabels |
| 24 | match bool |
| 25 | wantErr bool |
| 26 | }{ |
| 27 | "metric name only": { |
| 28 | expr: "go_memstats_alloc_bytes", |
| 29 | metric: "go_memstats_alloc_bytes", |
| 30 | match: true, |
| 31 | }, |
| 32 | "metric and label exact": { |
| 33 | expr: `http_requests_total{job="api"}`, |
| 34 | metric: "http_requests_total", |
| 35 | labels: mapLabels{"job": "api"}, |
| 36 | match: true, |
| 37 | }, |
| 38 | "metric and label mismatch": { |
| 39 | expr: `http_requests_total{job="api"}`, |
| 40 | metric: "http_requests_total", |
| 41 | labels: mapLabels{"job": "db"}, |
| 42 | match: false, |
| 43 | }, |
| 44 | "only labels": { |
| 45 | expr: `{job="api"}`, |
| 46 | metric: "anything", |
| 47 | labels: mapLabels{"job": "api"}, |
| 48 | match: true, |
| 49 | }, |
| 50 | "invalid syntax": { |
| 51 | expr: `metric{job="api",}`, |
| 52 | wantErr: true, |
| 53 | }, |
| 54 | } |
| 55 | |
| 56 | for name, tc := range tests { |
| 57 | t.Run(name, func(t *testing.T) { |
| 58 | s, err := Parse(tc.expr) |
| 59 | if tc.wantErr { |
| 60 | require.Error(t, err) |
| 61 | return |
| 62 | } |
| 63 | require.NoError(t, err) |
| 64 | require.NotNil(t, s) |
| 65 | assert.Equal(t, tc.match, s.Matches(tc.metric, tc.labels)) |
| 66 | }) |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | func TestParseEmptyExpressionReturnsNil(t *testing.T) { |
| 71 | tests := map[string]struct { |
| 72 | expr string |
| 73 | }{ |
| 74 | "empty": {expr: ""}, |
| 75 | "whitespace": {expr: " \t\n"}, |
| 76 | } |
| 77 | |
| 78 | for name, tc := range tests { |
| 79 | t.Run(name, func(t *testing.T) { |
| 80 | s, err := Parse(tc.expr) |
| 81 | require.NoError(t, err) |
| 82 | assert.Nil(t, s) |
| 83 | }) |
| 84 | } |
| 85 | } |