package errors import ( "errors" "fmt" "io" "reflect" "testing") func TestNew(t *testing.T) { tests := []struct { err string want error }{ {"", fmt.Errorf("")}, {"foo", fmt.Errorf("foo")}, {"foo", New("foo")}, {"string with format specifiers: %v", errors.New("string with format specifiers: %v")}, } for _, tt := range tests { got := New(tt.err) if got.Error() != tt.want.Error() { t.Errorf("New.Error(): got: %q, want %q", got, tt.want) } }} func TestWrapNil(t *testing.T) { got := Wrap(nil, "no error") if got != nil { t.Errorf("Wrap(nil, \"no error\"): got %#v, expected nil", got) }} func TestWrap(t *testing.T) { tests := []struct { err error message string want string }{ {io.EOF, "read error", "read error: EOF"}, {Wrap(io.EOF, "read error"), "client error", "client error: read error: EOF"}, } for _, tt := range tests { got := Wrap(tt.err, tt.message).Error() if got != tt.want { t.Errorf("Wrap(%v, %q): got: %v, want %v", tt.err, tt.message, got, tt.want) } }} type nilError struct{} func (nilError) Error() string { return "nil error" } func TestCause(t *testing.T) { x := New("error") tests := []struct { err error want error }{{ // nil error is nil err: nil, want: nil, }, { // explicit nil error is nil err: (error)(nil), want: nil, }, { // typed nil is nil err: (*nilError)(nil), want: (*nilError)(nil), }, { // uncaused error is unaffected err: io.EOF, want: io.EOF, }, { // caused error returns cause err: Wrap(io.EOF, "ignored"), want: io.EOF, }, { err: x, // return from errors.New want: x, }, { WithMessage(nil, "whoops"), nil, }, { WithMessage(io.EOF, "whoops"), io.EOF, }, { WithStack(nil), nil, }, { WithStack(io.EOF), io.EOF, }} for i, tt := range tests { got := Cause(tt.err) if !reflect.DeepEqual(got, tt.want) { t.Errorf("test %d: got %#v, want %#v", i+1, got, tt.want) } }} func TestWrapfNil(t *testing.T) { got := Wrapf(nil, "no error") if got != nil { t.Errorf("Wrapf(nil, \"no error\"): got %#v, expected nil", got) }} func TestWrapf(t *testing.T) { tests := []struct { err error message string want string }{ {io.EOF, "read error", "read error: EOF"}, {Wrapf(io.EOF, "read error without format specifiers"), "client error", "client error: read error without format specifiers: EOF"}, {Wrapf(io.EOF, "read error with %d format specifier", 1), "client error", "client error: read error with 1 format specifier: EOF"}, } for _, tt := range tests { got := Wrapf(tt.err, tt.message).Error() if got != tt.want { t.Errorf("Wrapf(%v, %q): got: %v, want %v", tt.err, tt.message, got, tt.want) } }} func TestErrorf(t *testing.T) { tests := []struct { err error want string }{ {Errorf("read error without format specifiers"), "read error without format specifiers"}, {Errorf("read error with %d format specifier", 1), "read error with 1 format specifier"}, } for _, tt := range tests { got := tt.err.Error() if got != tt.want { t.Errorf("Errorf(%v): got: %q, want %q", tt.err, got, tt.want) } }} func TestWithStackNil(t *testing.T) { got := WithStack(nil) if got != nil { t.Errorf("WithStack(nil): got %#v, expected nil", got) }} func TestWithStack(t *testing.T) { tests := []struct { err error want string }{ {io.EOF, "EOF"}, {WithStack(io.EOF), "EOF"}, } for _, tt := range tests { got := WithStack(tt.err).Error() if got != tt.want { t.Errorf("WithStack(%v): got: %v, want %v", tt.err, got, tt.want) } }} func TestWithMessageNil(t *testing.T) { got := WithMessage(nil, "no error") if got != nil { t.Errorf("WithMessage(nil, \"no error\"): got %#v, expected nil", got) }} func TestWithMessage(t *testing.T) { tests := []struct { err error message string want string }{ {io.EOF, "read error", "read error: EOF"}, {WithMessage(io.EOF, "read error"), "client error", "client error: read error: EOF"}, } for _, tt := range tests { got := WithMessage(tt.err, tt.message).Error() if got != tt.want { t.Errorf("WithMessage(%v, %q): got: %q, want %q", tt.err, tt.message, got, tt.want) } } } // errors.New, etc values are not expected to be compared by value// but the change in errors#27 made them incomparable. Assert that// various kinds of errors have a functional equality operator, even// if the result of that equality is always false.func TestErrorEquality(t *testing.T) { vals := []error{ nil, io.EOF, errors.New("EOF"), New("EOF"), Errorf("EOF"), Wrap(io.EOF, "EOF"), Wrapf(io.EOF, "EOF%d", 2), WithMessage(nil, "whoops"), WithMessage(io.EOF, "whoops"), WithStack(io.EOF), WithStack(nil), } for i := range vals { for j := range vals { _ = vals[i] == vals[j] // mustn't panic } }}
package errors
import (
"errors"
"fmt"
"io"
"reflect"
"testing"
)
func TestNew(t *testing.T) {
tests := []struct {
err string
want error
}{
{"", fmt.Errorf("")},
{"foo", fmt.Errorf("foo")},
{"foo", New("foo")},
{"string with format specifiers: %v", errors.New("string with format specifiers: %v")},
}
for _, tt := range tests {
got := New(tt.err)
if got.Error() != tt.want.Error() {
t.Errorf("New.Error(): got: %q, want %q", got, tt.want)
}
}
}
func TestWrapNil(t *testing.T) {
got := Wrap(nil, "no error")
if got != nil {
t.Errorf("Wrap(nil, \"no error\"): got %#v, expected nil", got)
}
}
func TestWrap(t *testing.T) {
tests := []struct {
err error
message string
want string
}{
{io.EOF, "read error", "read error: EOF"},
{Wrap(io.EOF, "read error"), "client error", "client error: read error: EOF"},
}
for _, tt := range tests {
got := Wrap(tt.err, tt.message).Error()
if got != tt.want {
t.Errorf("Wrap(%v, %q): got: %v, want %v", tt.err, tt.message, got, tt.want)
}
}
}
type nilError struct{}
func (nilError) Error() string { return "nil error" }
func TestCause(t *testing.T) {
x := New("error")
tests := []struct {
err error
want error
}{{
// nil error is nil
err: nil,
want: nil,
}, {
// explicit nil error is nil
err: (error)(nil),
want: nil,
}, {
// typed nil is nil
err: (*nilError)(nil),
want: (*nilError)(nil),
}, {
// uncaused error is unaffected
err: io.EOF,
want: io.EOF,
}, {
// caused error returns cause
err: Wrap(io.EOF, "ignored"),
want: io.EOF,
}, {
err: x, // return from errors.New
want: x,
}, {
WithMessage(nil, "whoops"),
nil,
}, {
WithMessage(io.EOF, "whoops"),
io.EOF,
}, {
WithStack(nil),
nil,
}, {
WithStack(io.EOF),
io.EOF,
}}
for i, tt := range tests {
got := Cause(tt.err)
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("test %d: got %#v, want %#v", i+1, got, tt.want)
}
}
}
func TestWrapfNil(t *testing.T) {
got := Wrapf(nil, "no error")
if got != nil {
t.Errorf("Wrapf(nil, \"no error\"): got %#v, expected nil", got)
}
}
func TestWrapf(t *testing.T) {
tests := []struct {
err error
message string
want string
}{
{io.EOF, "read error", "read error: EOF"},
{Wrapf(io.EOF, "read error without format specifiers"), "client error", "client error: read error without format specifiers: EOF"},
{Wrapf(io.EOF, "read error with %d format specifier", 1), "client error", "client error: read error with 1 format specifier: EOF"},
}
for _, tt := range tests {
got := Wrapf(tt.err, tt.message).Error()
if got != tt.want {
t.Errorf("Wrapf(%v, %q): got: %v, want %v", tt.err, tt.message, got, tt.want)
}
}
}
func TestErrorf(t *testing.T) {
tests := []struct {
err error
want string
}{
{Errorf("read error without format specifiers"), "read error without format specifiers"},
{Errorf("read error with %d format specifier", 1), "read error with 1 format specifier"},
}
for _, tt := range tests {
got := tt.err.Error()
if got != tt.want {
t.Errorf("Errorf(%v): got: %q, want %q", tt.err, got, tt.want)
}
}
}
func TestWithStackNil(t *testing.T) {
got := WithStack(nil)
if got != nil {
t.Errorf("WithStack(nil): got %#v, expected nil", got)
}
}
func TestWithStack(t *testing.T) {
tests := []struct {
err error
want string
}{
{io.EOF, "EOF"},
{WithStack(io.EOF), "EOF"},
}
for _, tt := range tests {
got := WithStack(tt.err).Error()
if got != tt.want {
t.Errorf("WithStack(%v): got: %v, want %v", tt.err, got, tt.want)
}
}
}
func TestWithMessageNil(t *testing.T) {
got := WithMessage(nil, "no error")
if got != nil {
t.Errorf("WithMessage(nil, \"no error\"): got %#v, expected nil", got)
}
}
func TestWithMessage(t *testing.T) {
tests := []struct {
err error
message string
want string
}{
{io.EOF, "read error", "read error: EOF"},
{WithMessage(io.EOF, "read error"), "client error", "client error: read error: EOF"},
}
for _, tt := range tests {
got := WithMessage(tt.err, tt.message).Error()
if got != tt.want {
t.Errorf("WithMessage(%v, %q): got: %q, want %q", tt.err, tt.message, got, tt.want)
}
}
}
// errors.New, etc values are not expected to be compared by value
// but the change in errors#27 made them incomparable. Assert that
// various kinds of errors have a functional equality operator, even
// if the result of that equality is always false.
func TestErrorEquality(t *testing.T) {
vals := []error{
nil,
io.EOF,
errors.New("EOF"),
New("EOF"),
Errorf("EOF"),
Wrap(io.EOF, "EOF"),
Wrapf(io.EOF, "EOF%d", 2),
WithMessage(nil, "whoops"),
WithMessage(io.EOF, "whoops"),
WithStack(io.EOF),
WithStack(nil),
}
for i := range vals {
for j := range vals {
_ = vals[i] == vals[j] // mustn't panic
}
}
}