Tests for Step class
Tests for Step class

Closes #419.

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