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jsonpath_test.go
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jsonpath_test.go
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package jsonpath
import (
"encoding/json"
"reflect"
"strings"
"testing"
)
var goessner = []byte(`{
"store": {
"book": [
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
],
"bicycle": {
"color": "red",
"price": 19.95
}
},
"expensive": 10
}`)
var sample = map[string]interface{}{
"A": []interface{}{
"string",
23.3,
3,
true,
false,
nil,
},
"B": "value",
"C": 3.14,
"D": map[string]interface{}{
"C": 3.1415,
"V": []interface{}{
"string2a",
"string2b",
map[string]interface{}{
"C": 3.141592,
},
},
},
"E": map[string]interface{}{
"A": []interface{}{"string3"},
"D": map[string]interface{}{
"V": map[string]interface{}{
"C": 3.14159265,
},
},
},
"F": map[string]interface{}{
"V": []interface{}{
"string4a",
"string4b",
map[string]interface{}{
"CC": 3.1415926535,
},
map[string]interface{}{
"CC": "hello",
},
[]interface{}{
"string5a",
"string5b",
},
[]interface{}{
"string6a",
"string6b",
},
},
},
}
func TestGossner(t *testing.T) {
var data interface{}
json.Unmarshal(goessner, &data)
tests := map[string]interface{}{
"$.store.book[*].author": []interface{}{"Nigel Rees", "Evelyn Waugh", "Herman Melville", "J. R. R. Tolkien"},
"$..author": []interface{}{"Nigel Rees", "Evelyn Waugh", "Herman Melville", "J. R. R. Tolkien"},
}
assert(t, data, tests)
}
func TestParsing(t *testing.T) {
t.Run("pick", func(t *testing.T) {
assert(t, sample, map[string]interface{}{
"$": sample,
"$.A[0]": "string",
`$["A"][0]`: "string",
"$.A": []interface{}{"string", 23.3, 3, true, false, nil},
"$.A[*]": []interface{}{"string", 23.3, 3, true, false, nil},
"$.A.*": []interface{}{"string", 23.3, 3, true, false, nil},
"$.A.*.a": []interface{}{},
})
})
t.Run("slice", func(t *testing.T) {
assert(t, sample, map[string]interface{}{
"$.A[1,4,2]": []interface{}{23.3, false, 3},
`$["B","C"]`: []interface{}{"value", 3.14},
`$["C","B"]`: []interface{}{3.14, "value"},
"$.A[1:4]": []interface{}{23.3, 3, true},
"$.A[::2]": []interface{}{"string", 3, false},
"$.A[-2:]": []interface{}{false, nil},
"$.A[:-1]": []interface{}{"string", 23.3, 3, true, false},
"$.A[::-1]": []interface{}{nil, false, true, 3, 23.3, "string"},
"$.F.V[4:5][0,1]": []interface{}{"string5a", "string5b"},
"$.F.V[4:6][1]": []interface{}{"string5b", "string6b"},
"$.F.V[4:6][0,1]": []interface{}{"string5a", "string5b", "string6a", "string6b"},
"$.F.V[4,5][0:2]": []interface{}{"string5a", "string5b", "string6a", "string6b"},
"$.F.V[4:6]": []interface{}{
[]interface{}{
"string5a",
"string5b",
},
[]interface{}{
"string6a",
"string6b",
},
},
})
})
t.Run("quote", func(t *testing.T) {
assert(t, sample, map[string]interface{}{
`$[A][0]`: "string",
`$["A"][0]`: "string",
`$[B,C]`: []interface{}{"value", 3.14},
`$["B","C"]`: []interface{}{"value", 3.14},
})
})
t.Run("search", func(t *testing.T) {
assert(t, sample, map[string]interface{}{
"$..C": []interface{}{3.14, 3.1415, 3.141592, 3.14159265},
`$..["C"]`: []interface{}{3.14, 3.1415, 3.141592, 3.14159265},
"$.D.V..C": []interface{}{3.141592},
"$.D.V.*.C": []interface{}{3.141592},
"$.D.V..*.C": []interface{}{3.141592},
"$.D.*..C": []interface{}{3.141592},
"$.*.V..C": []interface{}{3.141592},
"$.*.D.V.C": []interface{}{3.14159265},
"$.*.D..C": []interface{}{3.14159265},
"$.*.D.V..*": []interface{}{3.14159265},
"$..D..V..C": []interface{}{3.141592, 3.14159265},
"$.*.*.*.C": []interface{}{3.141592, 3.14159265},
"$..V..C": []interface{}{3.141592, 3.14159265},
"$.D.V..*": []interface{}{
"string2a",
"string2b",
map[string]interface{}{
"C": 3.141592,
},
3.141592,
},
"$..A": []interface{}{
[]interface{}{"string", 23.3, 3, true, false, nil},
[]interface{}{"string3"},
},
"$..A..*": []interface{}{"string", 23.3, 3, true, false, nil, "string3"},
"$.A..*": []interface{}{"string", 23.3, 3, true, false, nil},
"$.A.*": []interface{}{"string", 23.3, 3, true, false, nil},
"$..A[0,1]": []interface{}{"string", 23.3},
"$..A[0]": []interface{}{"string", "string3"},
"$.*.V[0]": []interface{}{"string2a", "string4a"},
"$.*.V[1]": []interface{}{"string2b", "string4b"},
"$.*.V[0,1]": []interface{}{"string2a", "string2b", "string4a", "string4b"},
"$.*.V[0:2]": []interface{}{"string2a", "string2b", "string4a", "string4b"},
"$.*.V[2].C": []interface{}{3.141592},
"$..V[2].C": []interface{}{3.141592},
"$..V[*].C": []interface{}{3.141592},
"$.*.V[2].*": []interface{}{3.141592, 3.1415926535},
"$.*.V[2:3].*": []interface{}{3.141592, 3.1415926535},
"$.*.V[2:4].*": []interface{}{3.141592, 3.1415926535, "hello"},
"$..V[2,3].CC": []interface{}{3.1415926535, "hello"},
"$..V[2:4].CC": []interface{}{3.1415926535, "hello"},
"$..V[*].*": []interface{}{
3.141592,
3.1415926535,
"hello",
"string5a",
"string5b",
"string6a",
"string6b",
},
"$..[0]": []interface{}{
"string",
"string2a",
"string3",
"string4a",
"string5a",
"string6a",
},
"$..ZZ": []interface{}{},
})
})
}
func TestErrors(t *testing.T) {
tests := map[string]string{
".A": "path must start with a '$'",
"$.": "expected JSON child identifier after '.'",
"$.1": "unexpected token .1",
"$.A[]": "expected at least one key, index or expression",
`$["]`: "bad string invalid syntax",
`$[A][0`: "unexpected end of path",
"$.ZZZ": "child 'ZZZ' not found in JSON object",
"$.A*]": "unexpected token *",
"$.*V": "unexpected token V",
"$[B,C": "unexpected end of path",
"$.A[1,4.2]": "unexpected token '.'",
"$[C:B]": "expected JSON array",
"$.A[1:4:0:0]": "bad range syntax [start:end:step]",
"$.A[:,]": "unexpected token ','",
"$..": "cannot end with a scan '..'",
"$..1": "unexpected token '1' after deep search '..'",
}
assertError(t, sample, tests)
}
func assert(t *testing.T, json interface{}, tests map[string]interface{}) {
for path, expected := range tests {
actual, err := Get(json, path)
if err != nil {
t.Error("failed:", path, err)
} else if !reflect.DeepEqual(actual, expected) {
t.Errorf("failed: mismatch for %s\nexpected: %+v\nactual: %+v", path, expected, actual)
}
}
}
func assertError(t *testing.T, json interface{}, tests map[string]string) {
for path, expectedError := range tests {
_, err := Get(json, path)
if err == nil {
t.Error("path", path, "should fail with", expectedError)
} else if !strings.Contains(err.Error(), expectedError) {
t.Error("path", path, "shoud fail with ", expectedError, "but failed with:", err)
}
}
}