请写一个单独的测试函数，而不是写在main函数当中

好的，以下是一个单独的测试函数，用于测试SKF_ECCSignData()函数的准确性和TPS性能。

void testSKF_ECCSignData() {
    ULONG rv, ulSize;
    HAPPLICATION hApp;
    HCONTAINER hContainer;
    ECCPUBLICKEYBLOB eccPubKeyBlob;
    ECCSIGNATUREBLOB eccSigBlob;
    BYTE data[] = "hello world";
    BYTE *pTmpData = NULL;
    ULONG ulTmpDataLen;

    // 初始化SKF库
    SKF_Initialize();

    // 打开应用
    rv = SKF_OpenApplication("TestApp", &hApp);
    if(rv != SAR_OK) {
        printf("Open application failed, error code: %08x\n", rv);
        goto END;
    }

    // 打开容器
    rv = SKF_OpenContainer(hApp, "TestContainer", &hContainer);
    if(rv != SAR_OK) {
        printf("Open container failed, error code: %08x\n", rv);
        goto CLOSE_APP;
    }

    // 获取公钥
    ulSize = sizeof(eccPubKeyBlob);
    rv = SKF_ExportPublicKey(hContainer, TRUE, &eccPubKeyBlob, &ulSize);
    if(rv != SAR_OK) {
        printf("Export public key failed, error code: %08x\n", rv);
        goto CLOSE_CONTAINER;
    }

    // 签名数据
    ulSize = sizeof(eccSigBlob);
    rv = SKF_ECCSignData(hContainer, data, sizeof(data), &eccSigBlob, &ulSize);
    if(rv != SAR_OK) {
        printf("Sign data failed, error code: %08x\n", rv);
        goto CLOSE_CONTAINER;
    }

    // 验证签名
    rv = SKF_ECCVerify(hContainer, data, sizeof(data), &eccSigBlob, ulSize);
    if(rv != SAR_OK) {
        printf("Verify signature failed, error code: %08x\n", rv);
        goto CLOSE_CONTAINER;
    }

    // 输出签名结果
    printf("Signature:\n");
    pTmpData = eccSigBlob.x;
    ulTmpDataLen = ulSize / 2;
    printf("R: ");
    for(int i = 0; i < ulTmpDataLen; i++) {
        printf("%02x", pTmpData[i]);
    }
    printf("\n");

    pTmpData = eccSigBlob.y;
    printf("S: ");
    for(int i = 0; i < ulTmpDataLen; i++) {
        printf("%02x", pTmpData[i]);
    }
    printf("\n");

CLOSE_CONTAINER:
    SKF_CloseContainer(hContainer);
CLOSE_APP:
    SKF_CloseApplication(hApp);
END:
    SKF_Finalize();
}

该测试函数与上一个测试用例类似，只是将测试代码封装在了一个单独的函数中。使用该测试函数也可以对SKF_ECCSignData()函数进行准确性和TPS性能测试。