Function TestReadArray_ErrorOnTooFewElements

msgp/iter_test.go:639–670

(t *testing.T)

}

func TestReadArray_ErrorOnTooFewElements(t *testing.T) {
	// Array header says 2, but only 1 element provided.
	var buf bytes.Buffer
	w := NewWriter(&buf)
	if err := w.WriteArrayHeader(2); err != nil {
		t.Fatalf("WriteArrayHeader: %v", err)
	}
	if err := w.WriteInt(7); err != nil {
		t.Fatalf("WriteInt: %v", err)
	}
	if err := w.Flush(); err != nil {
		t.Fatalf("Flush: %v", err)
	}

	r := NewReader(&buf)
	var got []int
	var firstErr error
	ReadArray(r, r.ReadInt)(func(v int, err error) bool {
		if err != nil {
			firstErr = err
			return false
		}
		got = append(got, v)
		return true
	})
	if firstErr == nil {
		t.Fatalf("expected error due to missing second element, got nil")
	}
	if len(got) != 1 || got[0] != 7 {
		t.Fatalf("unexpected values read before error: %v", got)
	}
}

// approxEqual checks approximate equality for float32/float64
func approxEqual[T ~float32 | ~float64](a, b T) bool {