Support real pg configuration

config/test.exs

@@ -3,3 +3,16 @@ use Mix.Config
 config :stripe_mock, StripeMockWeb.Endpoint, server: false
 config :stripe_mock, StripeMock.Repo, pool: Ecto.Adapters.SQL.Sandbox
 config :logger, level: :warn
+
+config :stripe_mock, StripeMock.Database, enabled: false
+
+config :stripe_mock, StripeMock.Repo,
+  adapter: Ecto.Adapters.Postgres,
+  database: "stripe_mock_test",
+  hostname: System.get_env("POSTGRES_HOST", "localhost"),
+  port: System.get_env("POSTGRES_PORT", "5432"),
+  username: "postgres",
+  password: "postgres",
+  pool: Ecto.Adapters.SQL.Sandbox,
+  ownership_timeout: 30_000,
+  timeout: 30_000

lib/stripe_mock.ex

@@ -24,4 +24,24 @@ defmodule StripeMock do
   stores everything in its state. It'd be nice if `ecto_mnesia` was updated for
   Ecto 3, but as of right now this is the next best option.
   """
+
+  @doc """
+  Truncates all tables.
+  """
+  def reset() do
+    StripeMock.Repo.query!("""
+    TRUNCATE
+      cards,
+      customers,
+      tokens,
+      sources,
+      payment_methods,
+      payment_intents,
+      charges,
+      refunds
+    CASCADE
+    """)
+
+    :ok
+  end
 end

lib/stripe_mock/database.ex

@@ -5,16 +5,21 @@ defmodule StripeMock.Database do
 
   use GenServer
 
-  def start_link(arg) do
-    GenServer.start_link(__MODULE__, arg, name: __MODULE__)
+  def start_link(_) do
+    GenServer.start_link(__MODULE__, enabled?(), name: __MODULE__)
+  end
+
+  def enabled?() do
+    Application.get_env(:stripe_mock, __MODULE__, [])
+    |> Keyword.get(:enabled, true)
   end
 
   def ecto_config() do
     GenServer.call(__MODULE__, :config)
   end
 
   @impl true
-  def init(_) do
+  def init(true) do
     {uri, _} = System.cmd("pg_tmp", ["-t", "-w", "180"])
 
     [[username, host, port, database]] =
@@ -33,6 +38,10 @@ defmodule StripeMock.Database do
     {:ok, config}
   end
 
+  def init(_) do
+    {:ok, []}
+  end
+
   @impl true
   def handle_call(:config, _from, state) do
     {:reply, state, state}

lib/stripe_mock/repo.ex

@@ -4,7 +4,10 @@ defmodule StripeMock.Repo do
   alias StripeMock.Database
 
   def init(_type, config) do
-    {:ok, Keyword.merge(config, Database.ecto_config())}
+    case Database.enabled?() do
+      true -> {:ok, Keyword.merge(config, Database.ecto_config())}
+      _ -> {:ok, config}
+    end
   end
 
   def fetch(schema, id) do