add adap_go tests

adap_go.go

@@ -22,16 +22,6 @@ func AllocCStrDontFree(s string) *C.char {
 	return C.CString(s)
 }
 
-func AllocWCStr(s string) *C.wchar_t {
-	runes := []rune(s)
-	wchars := make([]uint16, len(runes)+1)
-	for i, r := range runes {
-		wchars[i] = uint16(r)
-	}
-	wchars[len(runes)] = 0
-	return (*C.wchar_t)(unsafe.Pointer(&wchars[0]))
-}
-
 func GoString(s *C.char) string {
 	return C.GoString((*C.char)(s))
 }

adap_go_test.go

@@ -0,0 +1,61 @@
+package gp
+
+import (
+	"testing"
+)
+
+func TestAllocCStr(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		want  string
+	}{
+		{"empty string", "", ""},
+		{"ascii string", "hello", "hello"},
+		{"unicode string", "hello 世界", "hello 世界"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cstr := AllocCStr(tt.input)
+			got := GoString(cstr)
+			if got != tt.want {
+				t.Errorf("AllocCStr() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestGoStringN(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		n     int
+		want  string
+	}{
+		{"empty string", "", 0, ""},
+		{"partial string", "hello", 3, "hel"},
+		{"full string", "hello", 5, "hello"},
+		{"unicode partial", "hello 世界", 6, "hello "},
+		{"unicode full", "hello 世界", 12, "hello 世界"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cstr := AllocCStr(tt.input)
+			got := GoStringN(cstr, tt.n)
+			if got != tt.want {
+				t.Errorf("GoStringN() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestAllocCStrDontFree(t *testing.T) {
+	input := "test string"
+	cstr := AllocCStrDontFree(input)
+	got := GoString(cstr)
+	if got != input {
+		t.Errorf("AllocCStrDontFree() = %v, want %v", got, input)
+	}
+}