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package try_test
import (
"errors"
"fmt"
"log"
"testing"
"github.com/cheekybits/is"
"github.com/matryer/try"
)
func TestTryExample(t *testing.T) {
try.MaxRetries = 20
SomeFunction := func() (string, error) {
return "", nil
}
err := try.Do(func(attempt int) (bool, error) {
var err error
_, err = SomeFunction()
return attempt < 5, err // try 5 times
})
if err != nil {
log.Fatalln("error:", err)
}
}
func TestTryExamplePanic(t *testing.T) {
SomeFunction := func() (string, error) {
panic("something went badly wrong")
}
err := try.Do(func(attempt int) (retry bool, err error) {
retry = attempt < 5 // try 5 times
defer func() {
if r := recover(); r != nil {
err = errors.New(fmt.Sprintf("panic: %v", r))
}
}()
_, err = SomeFunction()
return
})
if err != nil {
//log.Fatalln("error:", err)
}
}
func TestTryDoSuccessful(t *testing.T) {
is := is.New(t)
callCount := 0
err := try.Do(func(attempt int) (bool, error) {
callCount++
return attempt < 5, nil
})
is.NoErr(err)
is.Equal(callCount, 1)
}
func TestTryDoFailed(t *testing.T) {
is := is.New(t)
theErr := errors.New("something went wrong")
callCount := 0
err := try.Do(func(attempt int) (bool, error) {
callCount++
return attempt < 5, theErr
})
is.Equal(err, theErr)
is.Equal(callCount, 5)
}
func TestTryPanics(t *testing.T) {
is := is.New(t)
theErr := errors.New("something went wrong")
callCount := 0
err := try.Do(func(attempt int) (retry bool, err error) {
retry = attempt < 5
defer func() {
if r := recover(); r != nil {
err = errors.New(fmt.Sprintf("panic: %v", r))
}
}()
callCount++
if attempt > 2 {
panic("I don't like three")
}
err = theErr
return
})
is.Equal(err.Error(), "panic: I don't like three")
is.Equal(callCount, 5)
}
func TestRetryLimit(t *testing.T) {
is := is.New(t)
err := try.Do(func(attempt int) (bool, error) {
return true, errors.New("nope")
})
is.OK(err)
is.Equal(try.IsMaxRetries(err), true)
}
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