Robot Framework POST请求400场景测试：无法获取状态码求助

问题原因 #

RequestsLibrary的POST On Session关键字默认会将4xx、5xx类错误状态码的响应视为异常抛出，导致后续代码无法执行，无法从响应对象中获取status_code属性完成断言。

解决方案1：添加ignore_status=True参数（推荐） #

在调用POST On Session时添加ignore_status=True参数，关键字将不会因错误状态码抛出异常，直接返回完整响应对象，后续可正常获取状态码。

修改后的关键字代码：

**Post API Request**
    [Documentation]     Post Request call
    [Arguments]     ${base_url}       ${endpoint_uri}        ${jsonBody}=${None}        ${tokenGenerated}=${None}
    Create Session    mysession    ${base_url}      disable_warnings=1
    ${headers}  Create Dictionary  Content-Type=application/json     Authorization=Bearer ${tokenGenerated}
    # 加入ignore_status=True，禁止错误状态码触发异常
    ${postResponse}=  POST On Session  mysession  ${endpoint_uri}  json=${jsonBody}  headers=${headers}  ignore_status=True
    ${statusCode} =       Convert to string       ${postResponse.status_code}
    log to console       ${statusCode}
    Should Be Equal As Strings  ${postResponse.status_code}      400

解决方案2：捕获异常提取状态码 #

若你的robotframework-requests版本不支持ignore_status参数，可使用Run Keyword And Expect Error捕获异常，再从异常信息中提取状态码。

示例代码：

**Post API Request**
    [Documentation]     Post Request call
    [Arguments]     ${base_url}       ${endpoint_uri}        ${jsonBody}=${None}        ${tokenGenerated}=${None}
    Create Session    mysession    ${base_url}      disable_warnings=1
    ${headers}  Create Dictionary  Content-Type=application/json     Authorization=Bearer ${tokenGenerated}
    # 捕获400错误对应的异常
    ${error_msg}=  Run Keyword And Expect Error  400 Client Error:*
    ...  POST On Session  mysession  ${endpoint_uri}  json=${jsonBody}  headers=${headers}
    # 从异常字符串中截取状态码
    ${statusCode}=  Get Substring  ${error_msg}  0  3
    log to console       ${statusCode}
    Should Be Equal As Strings  ${statusCode}      400

解决方案3：直接调用requests原生方法 #

如果前两种方案都不适用，可直接调用Python的requests库原生方法，手动处理响应避免框架自动抛出异常。

示例代码：

**Post API Request**
    [Documentation]     Post Request call
    [Arguments]     ${base_url}       ${endpoint_uri}        ${jsonBody}=${None}        ${tokenGenerated}=${None}
    # 导入requests库
    ${requests}=  Import Library  requests
    ${full_url}=  Catenate  ${base_url}  ${endpoint_uri}
    ${headers}  Create Dictionary  Content-Type=application/json     Authorization=Bearer ${tokenGenerated}
    # 发送POST请求，按需设置allow_redirects和verify参数
    ${postResponse}=  Call Method  ${requests}  post  ${full_url}  json=${jsonBody}  headers=${headers}  allow_redirects=False  verify=False
    ${statusCode} =       Convert to string       ${postResponse.status_code}
    log to console       ${statusCode}
    Should Be Equal As Strings  ${postResponse.status_code}      400

内容的提问来源于stack exchange，提问作者rajesh