Question

我的网站UI自动化测试用例很少。

如果第一次和第二次失败，我想尝试至少三次我的测试用例。这样，我想确保此测试用例始终失败。

如果我们在NUnit中有任何选择，请告诉我。我正在使用C＃和NUnit。

Answer 1

您可以根据属性repeat在nunit中添加新属性并重建库。这很简单。

   [Test]
   [Repeat( 25 )]
   public void MyTest( ){
      // your test logic here
   }

Answer 2

从NUnit 3.0开始，有一个“重试”属性看起来就像kumar想要的那样。

请参阅Retry Attribute

Answer 3

对于逻辑循环，计算失败。断言。（失败== 0）轰隆完成。

不要这样做。写一个更好的测试，你可以证明是一致的。

Answer 4

nunit使用4个例外来判断测试结果。它们是：TimeoutException，AssertException，SuccessException和IgnoreException。您可以在nunit测试函数中使用这些。我猜你可以把你的测试代码放在try-catch中，然后捕获nunit断言异常两次。但我应该说，正如之前所评论的那样，需要间歇性地失败的测试是重新思考的理由。

Answer 5

如果您希望测试用例在报告失败之前多次运行，则可以使用“重试属性”。

[Test]
[Retry(3)]
public void MyTest( ){
  // your test logic here
}

Answer 6

我已经在python中为nunit3-console创建了一个包装器脚本，该脚本可以运行脚本，并且如果有任何失败的测试，将最多重新运行失败的测试--max-retries次。它还会将新结果合并到原始TestResult.xml中。

该脚本称为nunit-repeat，托管在https://github.com/sashoalm/nunit-repeat/。

用法示例：

python nunit-repeat.py --max-retries 3 -- .\MockFailingTests\packages\NUnit.ConsoleRunner.3.10.0\tools\nunit3-console.exe .\MockFailingTests\MockFailingTests\bin\Debug\MockFailingTests.dll

代码：

# Script to run nunit tests and then repeat any failed tests until we run out of retries.

import os
import sys
import subprocess
import xml.etree.ElementTree as ET

# Finds the corresponding test with the same name in another XML file.
def findCorrespondingTest(tree2, failedTest):
    test2 = tree2.findall(".//test-case[@fullname='{}']".format(failedTest.get('fullname')))
    if len(test2) != 1:
        print(failedTest.get('fullname'))
        for ii in test2:
            print(ii.get('fullname'))
        raise Exception("len(test2) != 1")
    return test2[0]

# Python XML lib doesn't show you who is the parent of a given element so we add the info ourselves.
def addParentInfo(tree):
    for child in tree:
        setParent(child, tree)
        addParentInfo(child)

# We strip the parentage info so it doesn't pollute the XML file.
def stripParentInfo(tree):
    for child in tree:
        child.attrib.pop('__my_parent__', 'None')
        stripParentInfo(child)

# Gets the parent of a given element.
def getParent(tree):
    return tree.attrib['__my_parent__']

# Sets the parent of a given element.
def setParent(tree, parent):
    tree.attrib['__my_parent__'] = parent

# Updates a parent test suite of a failed test that has passed on rerun.
def updateTestSuite(tree):
    tree.attrib['failed'] = str(int(tree.attrib['failed']) - 1)
    tree.attrib['passed'] = str(int(tree.attrib['passed']) + 1)
    if tree.attrib['failed'] == '0':
        tree.attrib['result'] = 'Passed'

# In-place replaces a failed test with a successful one.
def replaceTest(tree1, tree2):
    parent = getParent(tree1)
    tree1.__setstate__(tree2.__getstate__())
    setParent(tree1, parent)

# Updates the entire chain of parent test suites.
def updateParentTestSuites(testCase):
    suite = getParent(testCase)
    while suite and suite.tag == 'test-suite':
        updateTestSuite(suite)
        suite = getParent(suite)

# Merges the results from a rerun into the original test.
# Any failed test that has become successful upon rerun is updated.
def mergeRerunResults(tree1, tree2):
    for failedTest in tree1.iterfind(".//test-case[@result='Failed']"):
        test2 = findCorrespondingTest(tree2, failedTest)
        if test2.attrib['result'] == 'Passed':
            replaceTest(failedTest, test2)
            updateParentTestSuites(failedTest)

# Checks whether we have any failed tests.
def hasFailedTests(tree):
    return len(tree.findall(".//test-case[@result='Failed']")) > 0

# Writes the failed tests, one per line, in testlist.txt. This file
# will be passed to nunit console runner.
def writeFailedTests(tree):
    f = open('testlist.txt', 'w')
    for failedTest in tree.iterfind(".//test-case[@result='Failed']"):
        name = failedTest.attrib['fullname']
        f.write(name + '\n')

# Retries all the failing tests, until all pass or we run out of retries.
def retryFailedTests(args, retries):
    # Add the testfilter to nunit's command line.
    args.append('--testlist')
    args.append('testlist.txt')
    # Load the test results from the first invocation.
    tree = ET.parse('TestResult.xml')
    addParentInfo(tree.getroot())
    # Run the retries.
    while retries > 0 and hasFailedTests(tree):
        retries -= 1
        writeFailedTests(tree)
        subprocess.call(args)
        mergeRerunResults(tree, ET.parse('TestResult.xml'))
    # Write the final results.
    stripParentInfo(tree.getroot())
    tree.write('TestResult.xml')
    # Check if we still have failing tests.
    if hasFailedTests(tree):
        raise Exception("There are failed tests even after retrying.")

# Main function.
def main():
    args = sys.argv
    # Get the number of retries.
    try:
        retries = int(args[args.index('--max-retries') + 1])
    except:
        retries = 3
    # Get the nunit command line.
    args = args[args.index('--')+1:]
    # Invoke nunit the first time.
    subprocess.call(args)
    # Retry any failed tests.
    retryFailedTests(args, retries)

# Execute main function.
main()

NUnit - 重复测试用例3次，如果失败

6 个答案: