How to use LuaCov with mini.test?

[MunifTanjim]

How to use LuaCov with mini.test?

I tried require-ing LuaCov by doing pcall(require, "luacov") at the top of the test file. But it doesn't generate luacov.stats.out file after test is run.

[echasnovski]

Not quite sure, as I don't use it at all. It might be even impossible for how 'mini.test' recommends to do tests (each one in a separate new child process), so not sure.

[MunifTanjim]

Hmm... couldn't make it work. I guess only plenary.nvim supports it right now. 😅

[echasnovski]

Sorry to hear that.

I honestly (after reading several times through README and docs) don't understand how this can even work in a normal setting. Here, in 'mini.test', it is more like calling code in separate child processes, so even more hard. Maybe adding require('luacov') in 'minimal_init.lua' of child process can make it work?

[MunifTanjim]

Does mini.test spawn child process by default?

I tried with a very simple test:

pcall(require, "luacov")

describe("bar", function()
  it("init", function()
    local Bar = require("nougat.bar")
    local bar = Bar("statusline")
    MiniTest.expect.equality(bar, bar)
  end)
end)

I also tried doing pcall(require, "luacov") in the init.lua file, and running the test like this:

  nvim --headless --noplugin -u tests/init.lua \
    -c "lua MiniTest.run({ execute = { reporter = MiniTest.gen_reporter.stdout({ group_depth = 9 }) } })"

[echasnovski]

Does mini.test spawn child process by default?
No, it doesn't.

---

Not sure, maybe it has something to do with the fact that 'mini.test' doesn't actually run tests when they are sourced. It first collects them in a special table and then executes its content.