From 1df8fb30155b21e08788cfa53c495e7a0d65f12a Mon Sep 17 00:00:00 2001
From: zlasd <zlasd@hotmail.com>
Date: Sun, 31 Dec 2023 20:11:33 +0800
Subject: [PATCH] Ensure empty Decimal returns correct zero-value NumDigits
 (#301)

---
 decimal.go      | 1 +
 decimal_test.go | 1 +
 2 files changed, 2 insertions(+)

diff --git a/decimal.go b/decimal.go
index 8014910..6f7c41e 100644
--- a/decimal.go
+++ b/decimal.go
@@ -928,6 +928,7 @@ func (d Decimal) Ln(precision int32) (Decimal, error) {
 // NumDigits returns the number of digits of the decimal coefficient (d.Value)
 // Note: Current implementation is extremely slow for large decimals and/or decimals with large fractional part
 func (d Decimal) NumDigits() int {
+	d.ensureInitialized()
 	// Note(mwoss): It can be optimized, unnecessary cast of big.Int to string
 	if d.IsNegative() {
 		return len(d.value.String()) - 1
diff --git a/decimal_test.go b/decimal_test.go
index 2df9591..7dc5be6 100644
--- a/decimal_test.go
+++ b/decimal_test.go
@@ -2829,6 +2829,7 @@ func TestDecimal_NumDigits(t *testing.T) {
 		{"-5.26", 3},
 		{"-5.2663117716", 11},
 		{"-26.1", 3},
+		{"", 1},
 	} {
 		d, _ := NewFromString(testCase.Dec)