luvit/tap - "Missing 1 expected call" not helpful without location of the error

[ghost]

tap's expect() function will produce an error like the following:

  [string ".../libs/tap.lua"]:83: Missing 1 expected call
  stack traceback:
        [C]: in function 'error'
        [string ".../libs/tap.lua"]:83: in function <[string ".../libs/tap.lua"]:64>
        [C]: in function 'xpcall'
        [string ".../libs/tap.lua"]:64: in function 'run'
        [string ".../libs/tap.lua"]:163: in function 'tap'
        [string ".../tests/run.lua"]:24: in function 'fn'
        [string "bundle:deps/require.lua"]:293: in function 'require'
        [string "bundle:main.lua"]:118: in function 'main'
        [string "bundle:init.lua"]:49: in function <[string "bundle:init.lua"]:47>
        [C]: in function 'xpcall'
        [string "bundle:init.lua"]:47: in function 'fn'
        [string "bundle:deps/require.lua"]:293: in function <[string "bundle:deps/require.lua"]:258>

However, without knowing which function was not called, it is hardly helpful.

Would it be possible to make expect() record the stacktrace when it is called and output that on failure?

[creationix]

That should be possible, good idea.

[kaustavha]

+1 to this idea, I've suffered writing tests.