src/main/python/tests/basics/test_context_creation.py

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import unittest
import logging
import io
import sys
from contextlib import redirect_stdout, redirect_stderr

from systemds.context import SystemDSContext


class TestContextCreation(unittest.TestCase):

    def test_random_port_debug(self):
        SystemDSContext._logging_initialized = False

        stderr_buffer = io.StringIO()

        with redirect_stderr(stderr_buffer):
            sds1 = SystemDSContext(logging_level=10, capture_stdout=True)
            sds1.close()

        err = stderr_buffer.getvalue()

        self.assertIn("DEBUG SystemDSContext: Logging setup done", err)

    def test_random_port_debug2(self):
        SystemDSContext._logging_initialized = False

        stderr_buffer = io.StringIO()

        with redirect_stderr(stderr_buffer):
            sds1 = SystemDSContext(capture_stdout=True)
            sds1.close()

            err = stderr_buffer.getvalue()

            # clear the buffer
            stderr_buffer.seek(0)
            stderr_buffer.truncate(0)

            sds2 = SystemDSContext(logging_level=10, capture_stdout=True)
            sds2.close()

        err = stderr_buffer.getvalue()

        self.assertIn("DEBUG SystemDSContext: Logging setup done", err)

    def test_random_port_debug3(self):
        SystemDSContext._logging_initialized = False

        sds1 = SystemDSContext(capture_stdout=True)
        sds1.close()
        stderr_buffer = io.StringIO()

        with redirect_stderr(stderr_buffer):
            sds2 = SystemDSContext(logging_level=10, capture_stdout=True)
            sds2.close()

        err = stderr_buffer.getvalue()

        self.assertIn("DEBUG SystemDSContext: Logging setup done", err)

    def test_random_port(self):
        sds1 = SystemDSContext(capture_stdout=True)
        sds1.close()

    def test_two_random_port(self):
        sds1 = SystemDSContext(capture_stdout=True)
        sds2 = SystemDSContext(capture_stdout=True)
        sds1.close()
        sds2.close()

    def test_same_port(self):
        # Same port should graciously change port
        sds1 = SystemDSContext(port=9415, capture_stdout=True)
        sds2 = SystemDSContext(port=9415, capture_stdout=True)
        sds1.close()
        sds2.close()

    def test_create_10_contexts(self):
        # Creating multiple contexts and closing them should be no problem.
        for _ in range(0, 10):
            SystemDSContext(capture_stdout=True).close()

    def test_create_multiple_context(self):
        # Creating multiple contexts in sequence but open at the same time is okay.
        a = SystemDSContext(capture_stdout=True)
        b = SystemDSContext(capture_stdout=True)
        c = SystemDSContext(capture_stdout=True)
        d = SystemDSContext(capture_stdout=True)

        a.close()
        b.close()
        c.close()
        d.close()


if __name__ == "__main__":
    unittest.main(exit=False)