test: perfect test cases for replaceVarible function in like case

Author: FinleyGe

test/cases/global/common/string/tools.test.ts

@@ -58,6 +58,23 @@ describe('string tools', () => {
     expect(replaceVariable(123 as any, { name: 'Ada' })).toBe(123);
   });
 
+  it('should treat $ special characters in replacement value as literals', () => {
+    // $1, $2 不应被解释为捕获组引用
+    expect(replaceVariable('value: {{val}}', { val: '$1' })).toBe('value: $1');
+    expect(replaceVariable('value: {{val}}', { val: '$2' })).toBe('value: $2');
+    // $$ 不应被解释为字面量 $
+    expect(replaceVariable('value: {{val}}', { val: '$$' })).toBe('value: $$');
+    // $& 不应被替换为整个匹配字符串
+    expect(replaceVariable('value: {{val}}', { val: '$&' })).toBe('value: $&');
+    // $` 和 $' 不应被替换为匹配前/后的内容
+    expect(replaceVariable('value: {{val}}', { val: "$'" })).toBe("value: $'");
+    expect(replaceVariable('value: {{val}}', { val: '$`' })).toBe('value: $`');
+    // 混合场景
+    expect(replaceVariable('result={{a}}&other={{b}}', { a: '$1', b: '$2' })).toBe(
+      'result=$1&other=$2'
+    );
+  });
+
   it('should replace sensitive text', () => {
     expect(replaceSensitiveText('Visit https://example.com/path?x=1')).toBe('Visit https://xxx');
     expect(replaceSensitiveText('token ns-abc-123 and ns-xyz')).toBe('token xxx and xxx');