A modern programming language that makes developers happier.

kotlinlang

My view is: 
*Unit Tests Advantages:*

    Provide very good failure isolation
    Ensure each component is fit-for-purpose before integrating
    Fast

*Unit Test Disadvantages:*

    Encourage glass-box testing as opposed to black-box testing. (ie mocks make it necessary to know what's going on inside a class, in order to test the external interface.
    Can be costly to set up or support changes.

*Integration Test Advantages:*

    Bang-for-your-buck: A small investment can provide very high test coverage
    Ensures components are working together as they were intended
    Encourages black-box style testing. Its not necessary to know what's going on inside a class. Just what's necessary to exercise the external API.

*Integration Test Disadvantages:*

    Indicate only that there was a failure, and not where there was a failure.
    Can be slow.
    Can have real effects that need to be rolled back.
    Can be difficult to put the system into the required state.