[!] use testcontainers for integration tests

.github/workflows/build.yml

@@ -17,111 +17,17 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true    
 
-jobs:
-
-  test-postgresql-windows:
-    if: true # false to skip job during debug
-    name: Test on Windows
-    runs-on: windows-latest
-    steps:
-
-    - name: Start PostgreSQL on Windows
-      run: |
-        $pgService = Get-Service -Name postgresql*
-        Set-Service -InputObject $pgService -Status running -StartupType automatic
-        Start-Process -FilePath "$env:PGBIN\pg_isready" -Wait -PassThru
-
-    - name: Create scheduler user on Windows
-      run: |
-        & $env:PGBIN\psql --command="CREATE USER scheduler PASSWORD 'somestrong'" --command="\du"
-
-    - name: Create timetable database
-      run: |
-        & $env:PGBIN\createdb --owner=scheduler timetable
-        $env:PGPASSWORD = 'somestrong'
-        & $env:PGBIN\psql --username=scheduler --host=localhost --list timetable
-
-    - name: Check out code
-      uses: actions/checkout@v5
-
-    - name: Set up Golang
-      uses: actions/setup-go@v6
-      with:
-        go-version: '1.25'
-
-    - name: Test
-      run: go test -v -p 1 -parallel 1 -failfast ./...
-
-
-
-  test-postgresql-macos:
-    if: true # false to skip job during debug
-    name: Test on MacOS
-    runs-on: macos-latest
-    steps:
-
-    - name: Start PostgreSQL on MacOS
-      run: |
-        brew update
-        brew install postgresql@16
-        brew link --force postgresql@16
-        brew services start postgresql@16  
-        echo "Check PostgreSQL service is running"
-        i=10
-        COMMAND='pg_isready'
-        while [ $i -gt 0 ]; do
-            echo "Check PostgreSQL service status"
-            eval $COMMAND && break
-            ((i--))
-            if [ $i == 0 ]; then
-                echo "PostgreSQL service not ready, all attempts exhausted"
-                exit 1
-            fi
-            echo "PostgreSQL service not ready, wait 10 more sec, attempts left: $i"
-            sleep 10
-        done
-
-    # Homebrew creates an account with the same name as the installing user, but no password
-    - name: Create scheduler user
-      run: |
-        psql --command="CREATE USER scheduler PASSWORD 'somestrong'" --command="\du" postgres
-
-    - name: Create timetable database
-      run: |
-        createdb --owner=scheduler timetable
-        PGPASSWORD=somestrong psql --username=scheduler --host=localhost --list timetable
+# This workflow uses testcontainers-go for PostgreSQL testing
+# Docker provides consistent environment - only Ubuntu needed
 
-    - name: Check out code
-      uses: actions/checkout@v5
-
-    - name: Set up Golang
-      uses: actions/setup-go@v6
-      with:
-        go-version: '1.25'
-
-    - name: Test
-      run: go test -v -p 1 -parallel 1 -failfast ./...
+jobs:
 
-  test-postgresql-ubuntu:
+  test:
     if: true # false to skip job during debug
-    name: Test and Build on Ubuntu
+    name: Test and Build with Testcontainers
     runs-on: ubuntu-latest
     steps:
 
-    - name: Start PostgreSQL on Ubuntu
-      run: |
-        sudo systemctl start postgresql.service
-        pg_isready
-
-    - name: Create scheduler user
-      run: |
-        sudo -u postgres psql --command="CREATE USER scheduler PASSWORD 'somestrong'" --command="\du"
-
-    - name: Create timetable database
-      run: |
-        sudo -u postgres createdb --owner=scheduler timetable
-        PGPASSWORD=somestrong psql --username=scheduler --host=localhost --list timetable
-
     - name: Check out code
       uses: actions/checkout@v5
 
@@ -140,23 +46,42 @@ jobs:
       with:
         version: latest
 
-    - name: Test
-      run: go test -failfast -v -timeout=300s -p 1 -coverprofile=profile.cov ./...
+    - name: Test with Testcontainers
+      run: go test -failfast -v -timeout=300s -coverprofile=profile.cov ./...
 
-    - name: Coveralls
-      uses: shogo82148/actions-goveralls@v1
+    - name: Upload coverage profile
+      uses: actions/upload-artifact@v4
       with:
-        path-to-profile: profile.cov      
+        name: coverage-profile-${{ github.run_id }}
+        path: profile.cov
+        retention-days: 1
 
     - name: Run GoReleaser
       uses: goreleaser/goreleaser-action@v6
       with:
         version: latest
         args: release --snapshot --skip=publish --clean
 
+  coverage:
+    if: true # false to skip job during debug
+    name: Coverage Report
+    runs-on: ubuntu-latest
+    needs: [test]
+    steps:
+
+    - name: Download coverage profile
+      uses: actions/download-artifact@v4
+      with:
+        name: coverage-profile-${{ github.run_id }}
+
+    - name: Send coverage to Coveralls
+      uses: coverallsapp/github-action@v2
+      with:
+        file: profile.cov
+
   build-docs:
     if: true # false to skip job during debug
-    needs: [test-postgresql-ubuntu, test-postgresql-windows, test-postgresql-macos]
+    needs: [test]
     name: Build Docs
     runs-on: ubuntu-latest
     steps:
@@ -201,7 +126,7 @@ jobs:
 
   test-docker-images:
     if: true # false to skip job during debug
-    needs: [test-postgresql-ubuntu, test-postgresql-windows, test-postgresql-macos]
+    needs: [test]
     name: Test Docker Image Build
     runs-on: ubuntu-latest
     steps:

.vscode/settings.json

@@ -1,3 +1,4 @@
 {
-    "files.eol": "\n"
+    "files.eol": "\n",
+    "terminal.integrated.defaultProfile.windows": "PowerShell" 
 }

go.mod

@@ -14,29 +14,76 @@ require (
 	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/viper v1.21.0
 	github.com/stretchr/testify v1.11.1
+	github.com/testcontainers/testcontainers-go v0.39.0
+	github.com/testcontainers/testcontainers-go/modules/postgres v0.39.0
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1
 )
 
 require (
+	dario.cat/mergo v1.0.2 // indirect
+	github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c // indirect
+	github.com/Microsoft/go-winio v0.6.2 // indirect
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/containerd/errdefs v1.0.0 // indirect
+	github.com/containerd/errdefs/pkg v0.3.0 // indirect
+	github.com/containerd/log v0.1.0 // indirect
+	github.com/containerd/platforms v0.2.1 // indirect
+	github.com/cpuguy83/dockercfg v0.3.2 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/distribution/reference v0.6.0 // indirect
+	github.com/docker/docker v28.4.0+incompatible // indirect
+	github.com/docker/go-connections v0.6.0 // indirect
+	github.com/docker/go-units v0.5.0 // indirect
+	github.com/ebitengine/purego v0.9.0 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/lufia/plan9stats v0.0.0-20250827001030-24949be3fa54 // indirect
+	github.com/magiconair/properties v1.8.10 // indirect
+	github.com/moby/docker-image-spec v1.3.1 // indirect
+	github.com/moby/go-archive v0.1.0 // indirect
+	github.com/moby/patternmatcher v0.6.0 // indirect
+	github.com/moby/sys/sequential v0.6.0 // indirect
+	github.com/moby/sys/user v0.4.0 // indirect
+	github.com/moby/sys/userns v0.1.0 // indirect
+	github.com/moby/term v0.5.2 // indirect
+	github.com/morikuni/aec v1.0.0 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.1.1 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
 	github.com/sagikazarmark/locafero v0.12.0 // indirect
+	github.com/shirou/gopsutil/v4 v4.25.8 // indirect
 	github.com/spf13/afero v1.15.0 // indirect
 	github.com/spf13/cast v1.10.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/tklauser/go-sysconf v0.3.15 // indirect
+	github.com/tklauser/numcpus v0.10.0 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0 // indirect
+	go.opentelemetry.io/otel v1.38.0 // indirect
+	go.opentelemetry.io/otel/metric v1.38.0 // indirect
+	go.opentelemetry.io/otel/trace v1.38.0 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/crypto v0.42.0 // indirect
 	golang.org/x/sync v0.17.0 // indirect
 	golang.org/x/sys v0.36.0 // indirect
 	golang.org/x/text v0.29.0 // indirect
+	google.golang.org/grpc v1.75.0 // indirect
+	google.golang.org/protobuf v1.36.7 // indirect
 	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )