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testing.go
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testing.go
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package resource
import (
"encoding/json"
"testing"
"bytes"
"github.com/sergi/go-diff/diffmatchpatch"
"fmt"
)
// ValidateJSONMarshalling
func validateJSONMarshalling(b []byte, v interface{}) error {
var err error
// convert to struct
err = json.Unmarshal(b, &v)
if err != nil {
return err
}
// back to json
prettyJSON, err := json.MarshalIndent(&v, "", " ")
if err != nil {
return err
}
// sort the data by keys
// omg im getting lost in my own train of thought
omg := make(map[string]interface{})
err = json.Unmarshal(prettyJSON, &omg)
if err != nil {
return err
}
omgAgain := make(map[string]interface{})
err = json.Unmarshal(b, &omgAgain)
if err != nil {
return err
}
// back to json
prettyJSON, err = json.MarshalIndent(&omg, "", " ")
if err != nil {
return err
}
b, err = json.MarshalIndent(&omgAgain, "", " ")
if err != nil {
return err
}
// minify for comparison
dst1 := bytes.Buffer{}
err = json.Compact(&dst1, b)
if err != nil {
return err
}
dst2 := bytes.Buffer{}
err = json.Compact(&dst2, prettyJSON)
if err != nil {
return err
}
// compare
if dst2.String() != dst1.String() {
dmp := diffmatchpatch.New()
diffs := dmp.DiffMain(string(b), string(prettyJSON), false)
return fmt.Errorf("json data differs. \nDifference \n%s", dmp.DiffPrettyText(diffs))
}
return nil
}
func check(err error, t *testing.T) {
// Hide function from stacktrace, PR#3
t.Helper()
if err != nil {
t.Error(err)
}
}