Function assertThrowsOrKeepsValue

example/tests/sandbox_test.js:78–90

(assign, read, expected, message)

  }

  function assertThrowsOrKeepsValue(assign, read, expected, message) {
    let threw = false;
    try {
      assign();
    } catch {
      threw = true;
    }
    assertSame(
      expected,
      read(),
      `${message}${threw ? "（赋值抛出，值保持不变）" : ""}`,
    );
  }

  async function test(name, fn) {
    testResults.total++;