Add tests for ENV.with_build_environment
Add tests for ENV.with_build_environment

DomT4/brew,mgrimes/brew,mgrimes/brew,nandub/brew,pseudocody/brew,nandub/brew,konqui/brew,aw1621107/brew,muellermartin/dist,toonetown/homebrew,rwhogg/brew,gordonmcshane/homebrew,zmwangx/brew,maxim-belkin/brew,konqui/brew,mahori/brew,EricFromCanada/brew,JCount/brew,DomT4/brew,mgrimes/brew,Linuxbrew/brew,gordonmcshane/homebrew,sjackman/homebrew,EricFromCanada/brew,bfontaine/brew,mistydemeo/homebrew,AnastasiaSulyagina/brew,MikeMcQuaid/brew,JCount/brew,claui/brew,amar-laksh/brew_sudo,jmsundar/brew,mahori/brew,vitorgalvao/brew,reitermarkus/brew,pseudocody/brew,mahori/brew,alyssais/brew,ilovezfs/brew,claui/brew,aw1621107/brew,sjackman/homebrew,Linuxbrew/brew,tonyg/homebrew,gregory-nisbet/brew,Homebrew/brew,staticfloat/brew,AnastasiaSulyagina/brew,hanxue/linuxbrew,reitermarkus/brew,jmsundar/brew,gordonmcshane/homebrew,Homebrew/brew,konqui/brew,bfontaine/brew,claui/brew,toonetown/homebrew,staticfloat/brew,JCount/brew,alyssais/brew,JCount/brew,vitorgalvao/brew,gregory-nisbet/brew,ilovezfs/brew,konqui/brew,jmsundar/brew,nandub/brew,sjackman/homebrew,sjackman/homebrew,pseudocody/brew,mistydemeo/homebrew,alyssais/brew,nandub/brew,AnastasiaSulyagina/brew,reitermarkus/brew,staticfloat/brew,tonyg/homebrew,zmwangx/brew,MikeMcQuaid/brew,palxex/brew,DomT4/brew,reelsense/brew,hanxue/linuxbrew,maxim-belkin/brew,muellermartin/dist,EricFromCanada/brew,MikeMcQuaid/brew,reitermarkus/brew,vitorgalvao/brew,MikeMcQuaid/brew,vitorgalvao/brew,aw1621107/brew,claui/brew,EricFromCanada/brew,palxex/brew,Linuxbrew/brew,gregory-nisbet/brew,rwhogg/brew,palxex/brew,tonyg/homebrew,zmwangx/brew,bfontaine/brew,Homebrew/brew,hanxue/linuxbrew,reelsense/brew,toonetown/homebrew,rwhogg/brew,muellermartin/dist,Homebrew/brew,maxim-belkin/brew,amar-laksh/brew_sudo,Linuxbrew/brew,DomT4/brew,mistydemeo/homebrew,reelsense/brew,mahori/brew,ilovezfs/brew,amar-laksh/brew_sudo