How to run Spring boot app's unit test on GitHub Action – Ubuntu

You need to make sure that the database runs.

Your program expects a Posgres DB named school_management to be available under localhost:5432.

However, such a database isn’t available in your script.

For setting up the database, you could use the an existing action like this one :

steps:
- uses: harmon758/postgresql-action@v1
  with:
    postgresql version: '11'
    postgresql db: school_management
    postgresql user: learning
    postgresql password: sa123456

Alternatively, you could use PosgreSQL service containers as described here:

    # Service containers to run with `container-job`
    services:
      # Label used to access the service container
      postgres:
        # Docker Hub image
        image: postgres
        # Provide the password for postgres
        env:
          POSTGRES_PASSWORD: sa123456
          POSTGRES_USER: learning
          POSTGRES_DB: school_management
        # Set health checks to wait until postgres has started
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5

However this makes it run using a different hostname so you have to change your spring.datasource.url to jdbc:postgresql://localhost:5432/school_management or similar.

Integrated in your workflow, it could look like the following:

name: CI

on:
  pull_request:
  push:
    branches: [develop, main]

concurrency:
  group: ci-${{ github.ref }}-group
  cancel-in-progress: true

jobs:
  default:
    runs-on: ubuntu-latest
        # Service containers to run with `container-job`
    services:
      # Label used to access the service container
      postgres:
        # Docker Hub image
        image: postgres
        # Provide the password for postgres
        env:
          POSTGRES_PASSWORD: sa123456
          POSTGRES_USER: learning
          POSTGRES_DB: school_management
        # Set health checks to wait until postgres has started
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
    steps:
      - uses: actions/checkout@v3
      - name: Set up JDK
        uses: actions/setup-java@v3
        with:
          java-version: '17'
          distribution: 'temurin'
      # override spring.datasource.url
      - name: Setup config
        run: |
          mkdir config
          echo 'spring.datasource.url=jdbc:postgresql://postgres:5432/school_management' > config/application.properties
      - name: Build with Maven
        run: mvn -B package --file pom.xml
      - name: Update dependency graph
        uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6
      - name: Build Jar file
        run: ./project-dev build-jar
      - name: Save Jar file
        uses: actions/upload-artifact@v3
        with:
          name: demo-0.0.1-SNAPSHOT
          path: target/demo-0.0.1-SNAPSHOT.jar 
          retention-days: 1

Another possibility is to use an embedded database like H2 for tests.

With this, you don’t have to setup any database.