distribution/errors_test.go

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package registry
import (
"encoding/json"
"testing"
)
// TestErrorCodes ensures that error code format, mappings and
// marshaling/unmarshaling. round trips are stable.
func TestErrorCodes(t *testing.T) {
for ec, _ := range errorCodeStrings {
if ec.String() != errorCodeStrings[ec] {
t.Fatalf("error code string incorrect: %q != %q", ec.String(), errorCodeStrings[ec])
}
if ec.Message() != errorCodesMessages[ec] {
t.Fatalf("incorrect message for error code %v: %q != %q", ec, ec.Message(), errorCodesMessages[ec])
}
// Serialize the error code using the json library to ensure that we
// get a string and it works round trip.
p, err := json.Marshal(ec)
if err != nil {
t.Fatalf("error marshaling error code %v: %v", ec, err)
}
if len(p) <= 0 {
t.Fatalf("expected content in marshaled before for error code %v", ec)
}
// First, unmarshal to interface and ensure we have a string.
var ecUnspecified interface{}
if err := json.Unmarshal(p, &ecUnspecified); err != nil {
t.Fatalf("error unmarshaling error code %v: %v", ec, err)
}
if _, ok := ecUnspecified.(string); !ok {
t.Fatalf("expected a string for error code %v on unmarshal got a %T", ec, ecUnspecified)
}
// Now, unmarshal with the error code type and ensure they are equal
var ecUnmarshaled ErrorCode
if err := json.Unmarshal(p, &ecUnmarshaled); err != nil {
t.Fatalf("error unmarshaling error code %v: %v", ec, err)
}
if ecUnmarshaled != ec {
t.Fatalf("unexpected error code during error code marshal/unmarshal: %v != %v", ecUnmarshaled, ec)
}
}
}
// TestErrorsManagement does a quick check of the Errors type to ensure that
// members are properly pushed and marshaled.
func TestErrorsManagement(t *testing.T) {
var errs Errors
errs.Push(ErrorCodeInvalidChecksum)
var detail DetailUnknownLayer
detail.Unknown.BlobSum = "sometestblobsumdoesntmatter"
errs.Push(ErrorCodeUnknownLayer, detail)
p, err := json.Marshal(errs)
if err != nil {
t.Fatalf("error marashaling errors: %v", err)
}
expectedJSON := "{\"errors\":[{\"code\":\"INVALID_CHECKSUM\",\"message\":\"provided checksum did not match uploaded content\"},{\"code\":\"UNKNOWN_LAYER\",\"message\":\"Referenced layer not available\",\"detail\":{\"unknown\":{\"blobSum\":\"sometestblobsumdoesntmatter\"}}}]}"
if string(p) != expectedJSON {
t.Fatalf("unexpected json: %q != %q", string(p), expectedJSON)
}
}