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Snapshot tests for Grandinė

Test paths are structured as follows:

<preset>/<configuration>/ <anchor> / <other data> / <test case>

Apart from <test case>, none of these are self-describing. The test runner is expected to have code to handle each variation. This may change in the future.

A test case consists of pairs of *.request and *.response files. Requests are performed in lexicographical order. Each test case is run in isolation.

All requests must use HTTP/1.0. This is to keep the test runner simple. This may change in the future.

*.response files do not have to be written by hand. They can be generated and updated by setting the UPDATE_RESPONSES environment variable to true:

UPDATE_RESPONSES=true cargo test

Setting it to any other value has the same effect as leaving it unset.

Self-contained requests without side effects should be grouped into test cases named *read-only to save resources. The test runner treats them specially by always running all requests in them for better error reporting. This should still be faster than having individual test cases for each request. This assumes the requests are in fact read-only.