You suddenly have a curious aspiration to create a package installer that can handle dependencies. You want to be able to give the installer a list of packages with dependencies, and have it install the packages in order such that an install won’t fail due to a missing dependency. This exercise is to write the code that will determine the order of install.
- Please complete the exercise in either C#, Javascript, Java or Scala.
- Please use Test Driven Development (TDD) and include your tests.
- Please submit your code in a git repo (zipped and emailed, not on github) where you have committed throughout the process so that
- we can see your progress as you code the solution.
- The function should accept an array of strings defining packages and their dependencies. Each string contains the name of a package
- followed by a colon and space then any dependencies required by that package. For simplicity we’ll assume that a package can have
- at most one dependency.
- The function should reject as invalid a dependency specification that contains cycles.
- The function should output a comma separated string of package names in the order of install, such that a package’s dependency will
- always precede that package.
VALID INPUT EXAMPLE 1
The input:
[ "KittenService: CamelCaser", "CamelCaser: " ]represents two packages, KittenService and CamelCaser, where KittenService depends on CamelCaser. In this case the output should be:
"CamelCaser, KittenService"The output indicates that CamelCaser needs to be installed before KittenService.
npm installnpm run test