ios - How to change app's NSProcessInfo environment dictionary from a unit test? -

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i have following code in app. behaviour can altered setting "my_key" key in environment dictionary of process information.

func mymethod() {   var environment = nsprocessinfo.processinfo().environment   if environment["my_key"] { /* /* } }

i test in unit test. problem changing environment dictionary in unit test no affect dictionary in app.

class myapptests: xctestcase {   func testme() {     var environment = nsprocessinfo.processinfo().environment     environment["my_key"] = "my value"     mymethod()     // app's environment not change   } end

is possible change environment dictionary of app unit test?

the environment provided nsprocessinfo read-only. can set environment variable using setenv c function (works fine swift), this:

setenv("my_key", "my value", 1)

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