ci: Configure test environment for Postgres on CI

.github/workflows/test.yml

@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: ["main"]
 
+env:
+  MIX_ENV: test
+
 jobs:
   test:
     name: Test codebase
@@ -14,11 +17,16 @@ jobs:
     services:
       postgres:
         image: postgres
+        env:
+          POSTGRES_USERNAME: postgres
+          POSTGRES_PASSWORD: postgres
         options: >-
           --health-cmd pg_isready
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
+        ports:
+          - 5432:5432
 
     steps:
       - name: Checkout code
@@ -41,4 +49,6 @@ jobs:
         run: mix deps.get
 
       - name: Run tests
+        env:
+          DATABASE_URL: postgresql://postgres:postgres@localhost/medical_transcription_test
         run: mix test

config/test.exs

@@ -5,11 +5,18 @@ import Config
 # 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 :medical_transcription, MedicalTranscription.Repo,
-  hostname: "localhost",
-  database: "medical_transcription_test#{System.get_env("MIX_TEST_PARTITION")}",
-  pool: Ecto.Adapters.SQL.Sandbox,
-  pool_size: 10
+if System.get_env("DATABASE_URL") do
+  config :medical_transcription, MedicalTranscription.Repo,
+    url: System.get_env("DATABASE_URL"),
+    pool: Ecto.Adapters.SQL.Sandbox,
+    pool_size: 10
+else
+  config :medical_transcription, MedicalTranscription.Repo,
+    hostname: "localhost",
+    database: "medical_transcription_test#{System.get_env("MIX_TEST_PARTITION")}",
+    pool: Ecto.Adapters.SQL.Sandbox,
+    pool_size: 10
+end
 
 # We don't run a server during test. If one is required,
 # you can enable the server option below.