feat(core): Add --testing flag to cocod#281
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This is another bit of convenience for the reworked coco_runner test fixture. This adds an optional flag, `--testing`, to the cocod command-line which will be used by the coco_runner to put cocod into a test-isolation mode. When this flag is used: * cocod doesn't read any config from the standard config paths, but only from paths given by the COCO_CONFIG_FILE envar or on the command line. * cocod ignores a port specified in the config, and instead binds to a random port _on localhost only_. * So the runner knows which port it's listening on, cocod writes the port to a temporary state file called "_TESTING", which the runner can read the port from. * Cocod also inserts the random port it was assigned back into its own config so that a client fetching the config will get the correct port. The goal here is to ensure that, even were the cocod tests to be run on a host that happens to be running cocod in production, the test runner won't be able to interfere with or be affected by the production system.
tristpinsm
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Jun 6, 2026
ketiltrout
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Jun 10, 2026
Otherwise the `self.config` that the worker receives doesn't have the updated port number. Follow-up to #281
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This is another bit of convenience for the reworked coco_runner test fixture.
This adds an optional flag,
--testing, to the cocod command-line which will be used by the coco_runner to put cocod into a test-isolation mode. When this flag is used:The goal here is to ensure that, even were the cocod tests to be run on a host that happens to be running cocod in production, the test runner won't be able to interfere with or be affected by the production system.