mirror of
https://github.com/restic/restic.git
synced 2024-08-23 04:40:46 +02:00
227 lines
4.7 KiB
Go
227 lines
4.7 KiB
Go
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package errors
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import (
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"errors"
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"fmt"
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"io"
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"reflect"
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"testing"
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)
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func TestNew(t *testing.T) {
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tests := []struct {
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err string
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want error
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}{
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{"", fmt.Errorf("")},
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{"foo", fmt.Errorf("foo")},
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{"foo", New("foo")},
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{"string with format specifiers: %v", errors.New("string with format specifiers: %v")},
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}
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for _, tt := range tests {
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got := New(tt.err)
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if got.Error() != tt.want.Error() {
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t.Errorf("New.Error(): got: %q, want %q", got, tt.want)
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}
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}
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}
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func TestWrapNil(t *testing.T) {
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got := Wrap(nil, "no error")
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if got != nil {
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t.Errorf("Wrap(nil, \"no error\"): got %#v, expected nil", got)
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}
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}
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func TestWrap(t *testing.T) {
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tests := []struct {
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err error
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message string
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want string
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}{
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{io.EOF, "read error", "read error: EOF"},
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{Wrap(io.EOF, "read error"), "client error", "client error: read error: EOF"},
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}
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for _, tt := range tests {
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got := Wrap(tt.err, tt.message).Error()
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if got != tt.want {
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t.Errorf("Wrap(%v, %q): got: %v, want %v", tt.err, tt.message, got, tt.want)
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}
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}
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}
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type nilError struct{}
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func (nilError) Error() string { return "nil error" }
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func TestCause(t *testing.T) {
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x := New("error")
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tests := []struct {
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err error
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want error
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}{{
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// nil error is nil
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err: nil,
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want: nil,
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}, {
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// explicit nil error is nil
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err: (error)(nil),
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want: nil,
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}, {
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// typed nil is nil
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err: (*nilError)(nil),
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want: (*nilError)(nil),
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}, {
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// uncaused error is unaffected
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err: io.EOF,
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want: io.EOF,
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}, {
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// caused error returns cause
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err: Wrap(io.EOF, "ignored"),
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want: io.EOF,
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}, {
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err: x, // return from errors.New
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want: x,
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}, {
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WithMessage(nil, "whoops"),
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nil,
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}, {
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WithMessage(io.EOF, "whoops"),
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io.EOF,
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}, {
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WithStack(nil),
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nil,
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}, {
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WithStack(io.EOF),
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io.EOF,
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}}
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for i, tt := range tests {
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got := Cause(tt.err)
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if !reflect.DeepEqual(got, tt.want) {
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t.Errorf("test %d: got %#v, want %#v", i+1, got, tt.want)
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}
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}
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}
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func TestWrapfNil(t *testing.T) {
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got := Wrapf(nil, "no error")
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if got != nil {
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t.Errorf("Wrapf(nil, \"no error\"): got %#v, expected nil", got)
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}
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}
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func TestWrapf(t *testing.T) {
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tests := []struct {
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err error
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message string
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want string
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}{
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{io.EOF, "read error", "read error: EOF"},
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{Wrapf(io.EOF, "read error without format specifiers"), "client error", "client error: read error without format specifiers: EOF"},
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{Wrapf(io.EOF, "read error with %d format specifier", 1), "client error", "client error: read error with 1 format specifier: EOF"},
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}
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for _, tt := range tests {
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got := Wrapf(tt.err, tt.message).Error()
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if got != tt.want {
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t.Errorf("Wrapf(%v, %q): got: %v, want %v", tt.err, tt.message, got, tt.want)
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}
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}
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}
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func TestErrorf(t *testing.T) {
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tests := []struct {
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err error
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want string
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}{
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{Errorf("read error without format specifiers"), "read error without format specifiers"},
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{Errorf("read error with %d format specifier", 1), "read error with 1 format specifier"},
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}
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for _, tt := range tests {
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got := tt.err.Error()
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if got != tt.want {
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t.Errorf("Errorf(%v): got: %q, want %q", tt.err, got, tt.want)
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}
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}
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}
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func TestWithStackNil(t *testing.T) {
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got := WithStack(nil)
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if got != nil {
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t.Errorf("WithStack(nil): got %#v, expected nil", got)
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}
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}
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func TestWithStack(t *testing.T) {
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tests := []struct {
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err error
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want string
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}{
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{io.EOF, "EOF"},
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{WithStack(io.EOF), "EOF"},
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}
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for _, tt := range tests {
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got := WithStack(tt.err).Error()
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if got != tt.want {
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t.Errorf("WithStack(%v): got: %v, want %v", tt.err, got, tt.want)
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}
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}
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}
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func TestWithMessageNil(t *testing.T) {
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got := WithMessage(nil, "no error")
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if got != nil {
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t.Errorf("WithMessage(nil, \"no error\"): got %#v, expected nil", got)
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}
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}
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func TestWithMessage(t *testing.T) {
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tests := []struct {
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err error
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message string
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want string
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}{
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{io.EOF, "read error", "read error: EOF"},
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{WithMessage(io.EOF, "read error"), "client error", "client error: read error: EOF"},
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}
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for _, tt := range tests {
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got := WithMessage(tt.err, tt.message).Error()
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if got != tt.want {
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t.Errorf("WithMessage(%v, %q): got: %q, want %q", tt.err, tt.message, got, tt.want)
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}
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}
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}
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// errors.New, etc values are not expected to be compared by value
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// but the change in errors#27 made them incomparable. Assert that
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// various kinds of errors have a functional equality operator, even
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// if the result of that equality is always false.
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func TestErrorEquality(t *testing.T) {
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vals := []error{
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nil,
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io.EOF,
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errors.New("EOF"),
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New("EOF"),
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Errorf("EOF"),
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Wrap(io.EOF, "EOF"),
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Wrapf(io.EOF, "EOF%d", 2),
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WithMessage(nil, "whoops"),
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WithMessage(io.EOF, "whoops"),
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WithStack(io.EOF),
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WithStack(nil),
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}
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for i := range vals {
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for j := range vals {
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_ = vals[i] == vals[j] // mustn't panic
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}
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}
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}
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