How do you run tests in cypress from the command line? code example

Example 1: run cypress

./node_modules/.bin/cypress open

Example 2: how to run cypress test

./node_modules/.bin/cypress run   // just cypress run wont work

Example 3: hot to start cypress

npm install cypress                //takes about 3-5 minutes for entire process
./node_modules/.bin/cypress open   // just cypress run wont work