TestingElixir

Tests are implemented as Elixir scripts, hence .exs file format
ExUnit.start() starts ExUnit than runs the test

Steps:

mix test runs the tests

Testing macros

assert -> truthy expression
refute -> falsy expression

Tests Covered ->

Example test
Doc test
Db test
Mock test
GenServer test
Property test

Utilities ->

unit_test -> normal function test
doctests -> tests the iex> block in the function documentation Extremely useful as it demonstrates the user how to use the library and tests at the same time.
describe -> to group block of tests with independent setup calls

Testing functions that interacts with DB

Configuring DB connections

Ecto
configure the repo in config/test.exs
Direct Db insert testing.
Mox - Mocking library
Async running test using async: true
mix test --cover