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testing

  • Jest snapshot tests age badly unless you read the diff

    Note1 min read

    A snapshot that fails is regenerated with -u, and after the third time that becomes reflex — at which point the test asserts that the output equals whatever…

  • Testing a queue worker without running a queue

    Note2 min read

    Testing that a controller queued a job by starting a worker and waiting is slow and flaky, and testing it by asserting on the queue table couples the…

  • webpack 4 needs almost no configuration

    Deep dive10 min read

    One line replaced about eighty. The defaults are almost always right, and the cost is that they are invisible when they are not.

  • Laravel 5.6 and logging you can configure

    Deep dive10 min read

    Logging moved into a config file, and stacks are why it matters — a different format per destination, decided without touching a service provider.

  • Coverage on a legacy codebase is a direction, not a number

    Note2 min read

    Setting a minimum coverage threshold on a codebase at eleven percent produces either a permanently red build or a threshold set to eleven percent, and neither changes anything.…

  • Symfony 4 and the bundle that does not exist

    Deep dive10 min read

    A new project used to arrive with forty megabytes of vendor code and one route. The framework got smaller, and the interesting part is what happens at install…

  • The dump-server keeps var_dump out of the response

    Note2 min read

    Dumping from inside a JSON endpoint, a queue worker or a middleware corrupts the output you were trying to inspect, so the debugging tool destroys the thing being…

  • Bootstrap 4 dropped the float grid

    Deep dive10 min read

    Two and a half years in alpha, and the grid is flexbox now. The class renames are mechanical; the ones that changed meaning rather than name are not.

  • Mutation testing tells you what coverage does not

    Note1 min read

    Line coverage says a line executed during the suite. It does not say an assertion would have failed had that line been wrong, which is the question everyone…

  • Argument count errors are their own exception

    Note1 min read

    Calling a userland function with too few arguments used to be a warning that let execution continue with the parameter unset, which turned a call-site mistake into a…