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pint/internal/parser/utils

internal/parser/utils/absent_test.go

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1package utils_test
2
3import (
4 "testing"
5
6 "github.com/stretchr/testify/require"
7
8 "github.com/cloudflare/pint/internal/parser"
9 "github.com/cloudflare/pint/internal/parser/utils"
10)
11
12func TestHasOuterAbsent(t *testing.T) {
13 type callT struct {
14 call string
15 binExpr string
16 }
17
18 type testCaseT struct {
19 expr string
20 output []callT
21 }
22
23 testCases := []testCaseT{
24 {
25 expr: "foo",
26 },
27 {
28 expr: "absent(foo)",
29 output: []callT{{call: "absent(foo)"}},
30 },
31 {
32 expr: `absent(foo{job="bar"})`,
33 output: []callT{{call: `absent(foo{job="bar"})`}},
34 },
35 {
36 expr: `absent(foo{job="bar"}) AND on(job) bar`,
37 output: []callT{{
38 call: `absent(foo{job="bar"})`,
39 binExpr: `absent(foo{job="bar"}) and on(job) bar`,
40 }},
41 },
42 {
43 expr: `vector(1) or absent(foo{job="bar"}) AND on(job) bar`,
44 output: []callT{{
45 call: `absent(foo{job="bar"})`,
46 binExpr: `absent(foo{job="bar"}) and on(job) bar`,
47 }},
48 },
49 {
50 expr: `up == 0 or absent(foo{job="bar"}) AND on(job) bar`,
51 output: []callT{{
52 call: `absent(foo{job="bar"})`,
53 binExpr: `absent(foo{job="bar"}) and on(job) bar`,
54 }},
55 },
56 {
57 expr: `up == 0 or absent(foo{job="bar"}) or absent(bar)`,
58 output: []callT{
59 {call: `absent(foo{job="bar"})`},
60 {call: `absent(bar)`},
61 },
62 },
63 {
64 expr: `absent(sum(nonexistent{job="myjob"}))`,
65 output: []callT{
66 {call: `absent(sum(nonexistent{job="myjob"}))`},
67 },
68 },
69 {
70 expr: `up == 0 or absent(foo{job="bar"}) * on(job) group_left(xxx) bar`,
71 output: []callT{{
72 call: `absent(foo{job="bar"})`,
73 binExpr: `absent(foo{job="bar"}) * on(job) group_left(xxx) bar`,
74 }},
75 },
76 {
77 expr: `bar * on() group_left(xxx) absent(foo{job="bar"})`,
78 output: []callT{},
79 },
80 {
81 expr: `up == 0 or absent(foo{job="bar"}) * on(job) group_left() bar`,
82 output: []callT{{
83 call: `absent(foo{job="bar"})`,
84 binExpr: `absent(foo{job="bar"}) * on(job) group_left() bar`,
85 }},
86 },
87 {
88 expr: `bar * on() group_right(xxx) absent(foo{job="bar"})`,
89 output: []callT{{
90 call: `absent(foo{job="bar"})`,
91 binExpr: `bar * on() group_right(xxx) absent(foo{job="bar"})`,
92 }},
93 },
94 {
95 expr: `absent(foo{job="bar"}) * on(job) group_right(xxx) bar`,
96 output: []callT{},
97 },
98 {
99 expr: `absent(foo{job="bar"}) OR bar`,
100 output: []callT{{
101 call: `absent(foo{job="bar"})`,
102 }},
103 },
104 {
105 expr: `absent(foo{job="bar"}) OR absent(foo{job="bob"})`,
106 output: []callT{
107 {call: `absent(foo{job="bar"})`},
108 {call: `absent(foo{job="bob"})`},
109 },
110 },
111 {
112 expr: `absent(foo{job="bar"}) UNLESS absent(foo{job="bob"})`,
113 output: []callT{
114 {
115 call: `absent(foo{job="bar"})`,
116 binExpr: `absent(foo{job="bar"}) unless absent(foo{job="bob"})`,
117 },
118 },
119 },
120 }
121
122 for _, tc := range testCases {
123 t.Run(tc.expr, func(t *testing.T) {
124 n, err := parser.DecodeExpr(tc.expr)
125 if err != nil {
126 t.Error(err)
127 t.FailNow()
128 }
129 calls := utils.HasOuterAbsent(n)
130 if len(calls) == 0 {
131 if len(tc.output) > 0 {
132 t.Errorf("HasOuterAbsent() returned nil, expected %s", tc.output)
133 }
134 } else {
135 output := []callT{}
136 for _, a := range calls {
137 var c callT
138 if a.Fragment != nil {
139 c.call = a.Fragment.Node.String()
140 }
141 if a.BinExpr != nil {
142 c.binExpr = a.BinExpr.String()
143 }
144 output = append(output, c)
145 }
146 require.Equal(t, tc.output, output, "HasOuterAbsent() returned wrong output")
147 }
148 })
149 }
150}
151