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|
package errors
import (
"io"
"testing"
)
// Is is simplified facsimile of the go 1.13 errors.Is to ensure QueryError is compatible
func Is(err, target error) bool {
for err != nil {
if target == err {
return true
}
switch e := err.(type) {
case interface{ Unwrap() error }:
err = e.Unwrap()
default:
break
}
}
return false
}
func TestErrorf(t *testing.T) {
cause := io.EOF
t.Run("wrap error", func(t *testing.T) {
err := Errorf("boom: %v", cause)
if !Is(err, cause) {
t.Fatalf("expected errors.Is to return true")
}
})
t.Run("handles nil", func(t *testing.T) {
var err *QueryError
if Is(err, cause) {
t.Fatalf("expected errors.Is to return false")
}
})
t.Run("handle no arguments", func(t *testing.T) {
err := Errorf("boom")
if Is(err, cause) {
t.Fatalf("expected errors.Is to return false")
}
})
t.Run("handle non-error argument arguments", func(t *testing.T) {
err := Errorf("boom: %v", "shaka")
if Is(err, cause) {
t.Fatalf("expected errors.Is to return false")
}
})
}
|
