Add the test config.

.drone.yaml

@@ -0,0 +1,52 @@
+kind: pipeline
+type: docker
+name: default
+
+environment:
+  DATABASE_NAME: link_shortener_dev
+  DATABASE_USERNAME: postgres
+  DATABASE_PASSWORD: postgres
+  DATABASE_HOST: postgres
+  DATABASE_PORT: 5432
+  SECRET_KEY_BASE: TestSecretKeycRZ1H45gfdAsdf8DIb45df4664mRCruzwVEF68wosddfg324ost
+
+steps:
+  - name: install dependencies
+    image: elixir:1.14.0-slim
+    volumes:
+      - name: mix
+        path: /root/.mix
+    commands:
+      - mix local.hex --force
+      - mix local.rebar --force
+      - mix deps.get
+      - mix compile
+
+  - name: run migrations
+    image: elixir:1.14.0-slim
+    volumes:
+      - name: mix
+        path: /root/.mix
+    commands:
+      - mix ecto.setup
+
+  - name: run tests
+    image: elixir:1.14.0-slim
+    volumes:
+      - name: mix
+        path: /root/.mix
+    commands:
+      - mix test
+
+volumes:
+- name: mix
+  temp: {}
+
+services:
+  - name: postgres
+    image: postgres:15-alpine
+    environment:
+      POSTGRES_DB: link_shortener_dev
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+

CHANGELOG.org

@@ -40,4 +40,7 @@
     Refactor the Links module.
 ** 0.4.9 <2023-08-02 Wed>
     Add tests for the Links module.
+** 0.4.10 <2023-08-03 Thu>
+    Add the CI/CD configuration.
+    Add the test config.
 

config/test.exs

@@ -0,0 +1,30 @@
+import Config
+
+# Configure your database
+#
+# The MIX_TEST_PARTITION environment variable can be used
+# to provide built-in test partitioning in CI environment.
+# Run `mix help test` for more information.
+config :link_shortener, LinkShortener.Repo,
+  username: System.get_env("DATABASE_USERNAME"),
+  password: System.get_env("DATABASE_PASSWORD"),
+  hostname: System.get_env("DATABASE_HOST"),
+  database: "link_shortener_test#{System.get_env("MIX_TEST_PARTITION")}",
+  pool: Ecto.Adapters.SQL.Sandbox,
+  pool_size: 10
+
+# We don't run a server during test. If one is required,
+# you can enable the server option below.
+config :link_shortener, LinkShortenerWeb.Endpoint,
+  http: [ip: {127, 0, 0, 1}, port: 4002],
+  secret_key_base: System.get_env("SECRET_KEY_BASE"),
+  server: false
+
+# In test we don't send emails.
+config :link_shortener, LinkShortener.Mailer, adapter: Swoosh.Adapters.Test
+
+# Print only warnings and errors during test
+config :logger, level: :warn
+
+# Initialize plugs at runtime for faster test compilation
+config :phoenix, :plug_init_mode, :runtime