https://github.com/tomwright/tmpenv

Set temporary environment variables and program arguments.
https://github.com/tomwright/tmpenv

arguments environment environment-variables test test-driven-development testing testing-tools tests

Last synced: 19 days ago
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Set temporary environment variables and program arguments.

• Host: GitHub
• URL: https://github.com/tomwright/tmpenv
• Owner: TomWright
• License: mit
• Created: 2019-04-25T12:12:12.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-04-25T12:38:29.000Z (over 5 years ago)
• Last Synced: 2024-10-04T02:41:19.415Z (about 1 month ago)
• Topics: arguments, environment, environment-variables, test, test-driven-development, testing, testing-tools, tests
• Language: Go
• Size: 2.93 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# tmpenv

[![Build Status](https://travis-ci.org/TomWright/tmpenv.svg?branch=master)](https://travis-ci.org/TomWright/tmpenv)

[![codecov](https://codecov.io/gh/TomWright/tmpenv/branch/master/graph/badge.svg)](https://codecov.io/gh/TomWright/tmpenv)

[![Documentation](https://godoc.org/github.com/TomWright/tmpenv?status.svg)](https://godoc.org/github.com/TomWright/tmpenv)

Easily set temporary environment variables and commandline flags, usually within a testing environment.

## Quick start

`SetEnvVar`, `SetEnvVars` and `AppendOSArgs` all return a single `func`, which when executed will reset the given variables to their previous state.

*Important note - Things may not work as expected if you run your tests in parallel!*

### Setting environment variables

```

func TestSomething(t *testing.T) {

    log.Println(os.Getenv("A")) // ""

    

    t.Run("test one", func(t *testing.T) {

        resetEnvVars := tmpenv.SetEnvVars(map[string]string{

            "A":     "123",

        })

        defer resetEnvVars()

        log.Println(os.Getenv("A")) // "123"

    })

    

    log.Println(os.Getenv("A")) // ""

    

    t.Run("test two", func(t *testing.T) {

        resetEnvVars := tmpenv.SetEnvVars(map[string]string{

            "A":     "456",

        })

        defer resetEnvVars()

        log.Println(os.Getenv("A")) // "456"

    })

    log.Println(os.Getenv("A")) // ""

}

```