I am trying to run unit tests in a phoenix project. The tests I am writing mock functions that call Ecto.Adapters.SQL.Query() so I do not need a database connection for the tests to succeed.

When I run the tests with $ mix test/unit/my_test.exs I get the following error. I have no Idea how I can disable the repository connection attempt, any ideas?

16:29:41.248 [error] GenServer #PID<0.376.0> terminating
** (DBConnection.ConnectionError) tcp connect (localhost:5432): connection refused - :econnrefused
    (db_connection 2.4.2) lib/db_connection/connection.ex:100: DBConnection.Connection.connect/2
    (connection 1.1.0) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib 3.17) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
Last message: nil
State: Postgrex.Protocol

16:29:41.264 [error] GenServer #PID<0.382.0> terminating
** (DBConnection.ConnectionError) tcp connect (localhost:5432): connection refused - :econnrefused
    (db_connection 2.4.2) lib/db_connection/connection.ex:100: DBConnection.Connection.connect/2
    (connection 1.1.0) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib 3.17) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
Last message: nil
State: Postgrex.Protocol

Here is a sample that fails with this error

defmodule Test.Unit.MyTest do
  import Mock
  use ExUnit.Case
  @moduletag :unit_test

  describe "one equals two" do
    test "returns true" do
      assert 1 == 2
    end
  end
end