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57 lines
1.2 KiB
Python
57 lines
1.2 KiB
Python
import os
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from testutils import assert_raises
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fd = os.open('README.md', 0)
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assert fd > 0
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os.close(fd)
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assert_raises(OSError, lambda: os.read(fd, 10))
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FNAME = "test_file_that_no_one_will_have_on_disk"
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CONTENT = b"testing"
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CONTENT2 = b"rustpython"
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CONTENT3 = b"BOYA"
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class TestWithFile():
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def __enter__(self):
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open(FNAME, "wb")
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return FNAME
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def __exit__(self, exc_type, exc_val, exc_tb):
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os.remove(FNAME)
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with TestWithFile() as fname:
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fd = os.open(fname, 1)
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assert os.write(fd, CONTENT2) == len(CONTENT2)
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assert os.write(fd, CONTENT3) == len(CONTENT3)
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os.close(fd)
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fd = os.open(fname, 0)
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assert os.read(fd, len(CONTENT2)) == CONTENT2
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assert os.read(fd, len(CONTENT3)) == CONTENT3
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os.close(fd)
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assert_raises(FileNotFoundError, lambda: os.open('DOES_NOT_EXIST', 0))
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assert os.O_RDONLY == 0
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assert os.O_WRONLY == 1
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assert os.O_RDWR == 2
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ENV_KEY = "TEST_ENV_VAR"
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ENV_VALUE = "value"
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assert os.getenv(ENV_KEY) == None
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assert ENV_KEY not in os.environ
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assert os.getenv(ENV_KEY, 5) == 5
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os.environ[ENV_KEY] = ENV_VALUE
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assert ENV_KEY in os.environ
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assert os.getenv(ENV_KEY) == ENV_VALUE
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del os.environ[ENV_KEY]
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os.unsetenv(ENV_KEY)
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assert ENV_KEY not in os.environ
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assert os.getenv(ENV_KEY) == None
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