func TestCaller(t *testing.T) {
f := stack.Caller(0)
const expected = "stack_test.go:83 TestCaller"
if !strings.HasSuffix(f.String(), expected) {
t.Fatalf(`expected suffix "%s" got "%s"`, expected, f)
}
}
// WrapSkip may wrap the error and return an augmented error depending on the
// configuration in the context. The defaults result in the error being
// returned as is. It also handles nils correctly, returning a nil in that
// case. If the given error is already wrapped, it returns it as-is.
func WrapSkip(ctx context.Context, err error, skip int) error {
switch err := err.(type) {
case nil:
return nil
case *singleFrameError:
return err
case *singleStackError:
return err
case *multiStackError:
err.multiStack.AddCallers(skip + 1)
return err
}
config := ContextConfig(ctx)
switch config.StackMode {
case StackModeSingleFrame:
return &singleFrameError{
config: config,
underlying: err,
frame: stack.Caller(skip + 1),
}
case StackModeSingleStack:
return &singleStackError{
config: config,
underlying: err,
stack: stack.Callers(skip + 1),
}
case StackModeMultiStack:
return &multiStackError{
config: config,
underlying: err,
multiStack: stack.CallersMulti(skip + 1),
}
}
return err
}
func BenchmarkCaller(b *testing.B) {
for i := 0; i < b.N; i++ {
stack.Caller(0)
}
}