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|
package errcode
import (
"encoding/json"
"net/http"
"reflect"
"strings"
"testing"
)
// TestErrorsManagement does a quick check of the Errors type to ensure that
// members are properly pushed and marshaled.
var ErrorCodeTest1 = Register("test.errors", ErrorDescriptor{
Value: "TEST1",
Message: "test error 1",
Description: `Just a test message #1.`,
HTTPStatusCode: http.StatusInternalServerError,
})
var ErrorCodeTest2 = Register("test.errors", ErrorDescriptor{
Value: "TEST2",
Message: "test error 2",
Description: `Just a test message #2.`,
HTTPStatusCode: http.StatusNotFound,
})
var ErrorCodeTest3 = Register("test.errors", ErrorDescriptor{
Value: "TEST3",
Message: "Sorry %q isn't valid",
Description: `Just a test message #3.`,
HTTPStatusCode: http.StatusNotFound,
})
// TestErrorCodes ensures that error code format, mappings and
// marshaling/unmarshaling. round trips are stable.
func TestErrorCodes(t *testing.T) {
if len(errorCodeToDescriptors) == 0 {
t.Fatal("errors aren't loaded!")
}
for ec, desc := range errorCodeToDescriptors {
if ec != desc.Code {
t.Fatalf("error code in descriptor isn't correct, %q != %q", ec, desc.Code)
}
if idToDescriptors[desc.Value].Code != ec {
t.Fatalf("error code in idToDesc isn't correct, %q != %q", idToDescriptors[desc.Value].Code, ec)
}
if ec.Message() != desc.Message {
t.Fatalf("ec.Message doesn't mtach desc.Message: %q != %q", ec.Message(), desc.Message)
}
// Test (de)serializing the ErrorCode
p, err := json.Marshal(ec)
if err != nil {
t.Fatalf("couldn't marshal ec %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)
}
expectedErrorString := strings.ToLower(strings.Replace(ec.Descriptor().Value, "_", " ", -1))
if ec.Error() != expectedErrorString {
t.Fatalf("unexpected return from %v.Error(): %q != %q", ec, ec.Error(), expectedErrorString)
}
}
}
func TestErrorsManagement(t *testing.T) {
var errs Errors
errs = append(errs, ErrorCodeTest1)
errs = append(errs, ErrorCodeTest2.WithDetail(
map[string]interface{}{"digest": "sometestblobsumdoesntmatter"}))
errs = append(errs, ErrorCodeTest3.WithArgs("BOOGIE"))
errs = append(errs, ErrorCodeTest3.WithArgs("BOOGIE").WithDetail("data"))
p, err := json.Marshal(errs)
if err != nil {
t.Fatalf("error marashaling errors: %v", err)
}
expectedJSON := `{"errors":[` +
`{"code":"TEST1","message":"test error 1"},` +
`{"code":"TEST2","message":"test error 2","detail":{"digest":"sometestblobsumdoesntmatter"}},` +
`{"code":"TEST3","message":"Sorry \"BOOGIE\" isn't valid"},` +
`{"code":"TEST3","message":"Sorry \"BOOGIE\" isn't valid","detail":"data"}` +
`]}`
if string(p) != expectedJSON {
t.Fatalf("unexpected json:\ngot:\n%q\n\nexpected:\n%q", string(p), expectedJSON)
}
// Now test the reverse
var unmarshaled Errors
if err := json.Unmarshal(p, &unmarshaled); err != nil {
t.Fatalf("unexpected error unmarshaling error envelope: %v", err)
}
if !reflect.DeepEqual(unmarshaled, errs) {
t.Fatalf("errors not equal after round trip:\nunmarshaled:\n%#v\n\nerrs:\n%#v", unmarshaled, errs)
}
// Test the arg substitution stuff
e1 := unmarshaled[3].(Error)
exp1 := `Sorry "BOOGIE" isn't valid`
if e1.Message != exp1 {
t.Fatalf("Wrong msg, got:\n%q\n\nexpected:\n%q", e1.Message, exp1)
}
exp1 = "test3: " + exp1
if e1.Error() != exp1 {
t.Fatalf("Error() didn't return the right string, got:%s\nexpected:%s", e1.Error(), exp1)
}
// Test again with a single value this time
errs = Errors{ErrorCodeUnknown}
expectedJSON = "{\"errors\":[{\"code\":\"UNKNOWN\",\"message\":\"unknown error\"}]}"
p, err = json.Marshal(errs)
if err != nil {
t.Fatalf("error marashaling errors: %v", err)
}
if string(p) != expectedJSON {
t.Fatalf("unexpected json: %q != %q", string(p), expectedJSON)
}
// Now test the reverse
unmarshaled = nil
if err := json.Unmarshal(p, &unmarshaled); err != nil {
t.Fatalf("unexpected error unmarshaling error envelope: %v", err)
}
if !reflect.DeepEqual(unmarshaled, errs) {
t.Fatalf("errors not equal after round trip:\nunmarshaled:\n%#v\n\nerrs:\n%#v", unmarshaled, errs)
}
// Verify that calling WithArgs() more than once does the right thing.
// Meaning creates a new Error and uses the ErrorCode Message
e1 = ErrorCodeTest3.WithArgs("test1")
e2 := e1.WithArgs("test2")
if &e1 == &e2 {
t.Fatalf("args: e2 and e1 should not be the same, but they are")
}
if e2.Message != `Sorry "test2" isn't valid` {
t.Fatalf("e2 had wrong message: %q", e2.Message)
}
// Verify that calling WithDetail() more than once does the right thing.
// Meaning creates a new Error and overwrites the old detail field
e1 = ErrorCodeTest3.WithDetail("stuff1")
e2 = e1.WithDetail("stuff2")
if &e1 == &e2 {
t.Fatalf("detail: e2 and e1 should not be the same, but they are")
}
if e2.Detail != `stuff2` {
t.Fatalf("e2 had wrong detail: %q", e2.Detail)
}
}
|
