英文:
Pytestfs write then read doesn't return expected value
问题
我正在尝试编写一个涉及文件系统的测试。我选择使用pyfakefs和pytest来编写这些测试。当我尝试在虚拟文件系统中写入然后读取时，似乎无法使任何测试工作。因此，我编写了一个简单的测试来确保pyfakefs读取了正确的值：
def test_filesystem(fs):
with open("fooey.txt", "w+") as my_file:
my_file.write("Hello")
read = my_file.read(-1)
assert os.path.exists("fooey.txt")
assert "Hello" in read
第一个断言通过了，但第二个断言失败了。当我调试时，read 的值是 ''。我正在努力理解这里发生了什么。文件写入或读取在pyfakefs中是否不起作用？我做错了什么吗？
英文:
I'm trying to write a test involving the filesystem. I chose to use pyfakefs and pytest for writing these tests. When I was trying to write and then read from the fake filesystem, I couldn't seem to get any tests to work. So, I wrote a simple test to ensure that pyfakefs was reading the right value:
def test_filesystem(fs):
with open("fooey.txt", "w+") as my_file:
my_file.write("Hello")
read = my_file.read(-1)
assert os.path.exists("fooey.txt")
assert "Hello" in read
The first assertion passes. The second one fails. When I debug, read has a value of ''. I'm struggling to understand what's going on here. Does file writing or reading not work within pyfakefs? Am I doing something wrong?
答案1
得分: 1
def test_filesystem(fs):
with open("fooey.txt", "w") as my_file:
my_file.write("Hello")
with open("fooey.txt", "r") as my_file:
read = my_file.read()
assert os.path.exists("hoklh\\fooey.txt")
assert "Hello" in read
This should do it!
英文:
def test_filesystem(fs):
with open("fooey.txt", "w") as my_file:
my_file.write("Hello")
with open("fooey.txt", "r") as my_file:
read = my_file.read()
assert os.path.exists("hoklh\\fooey.txt")
assert "Hello" in read
This should do it!
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论