From f870a1b224641ffda9eb01a41c4d3ad9b2c40003 Mon Sep 17 00:00:00 2001
From: Spirale <2635131263@qq.com>
Date: Mon, 13 Jul 2026 23:12:02 +0800
Subject: [PATCH] =?UTF-8?q?test(slice):=20=E6=B7=BB=E5=8A=A0=20slice=20app?=
 =?UTF-8?q?end=20=E8=A1=8C=E4=B8=BA=E6=B5=8B=E8=AF=95?=
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新增 go/testing/slice/slice_test.go，验证将 slice 作为参数传入函数并在函数内 append 时不会影响原 slice 的 len/cap，借此说明 slice 值传递时的扩容行为。
---
 go/testing/slice/slice_test.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 go/testing/slice/slice_test.go

diff --git a/go/testing/slice/slice_test.go b/go/testing/slice/slice_test.go
new file mode 100644
index 0000000..f5b0a89
--- /dev/null
+++ b/go/testing/slice/slice_test.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"testing"
+)
+
+func appendSlice(s []int, n int) {
+	s = append(s, n)
+	fmt.Printf("len=%d,cap=%d\n", len(s), cap(s))
+}
+func TestSliceAppend(t *testing.T) {
+	s1 := make([]int, 5)
+	appendSlice(s1, 10)
+	if len(s1) != 5 || cap(s1) != 5 {
+		t.Errorf("Expected len=5, cap=5; got len=%d, cap=%d", len(s1), cap(s1))
+	}
+}