add CI tests

Author: MartinPulec

.github/scripts/run_tests.sh

@@ -0,0 +1,40 @@
+#!/bin/sh -eu
+ 
+case "$RUNNER_OS" in
+        Linux)
+                ug_build=UltraGrid-continuous-x86_64.AppImage
+                prepare() {
+                        chmod +x "$ug_build"
+                        ./"$ug_build" --appimage-extract
+                }
+                run=squashfs-root/AppRun
+                ;;
+        Windows)
+                ug_build=UltraGrid-continuous-win64.zip
+                prepare() {
+                        unzip "$ug_build"
+                }
+                run=UltraGrid-continuos-win64/uv.exe
+                ;;
+        macOS)
+                ug_build=UltraGrid-continuous-arm64.dmg
+                prepare() {
+                        hdiutil mount "$ug_build"
+                }
+                run=/Volumes/ULTRAGRID/uv-qt.app/Contents/MacOS/uv
+esac
+
+curl -LOf https://github.com/CESNET/UltraGrid/releases/download/continuous/\
+"$ug_build"
+
+prepare
+
+# basic sanity test
+$run -v
+
+## @1 args (manadatory)
+add_test() {
+        
+}
+
+. "$(dirname "$0")"/run_test_data.sh

.github/scripts/run_tests_data.sh

@@ -0,0 +1 @@
+

.github/workflows/daily_tests.yml

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+name: Continuous daily build tests
+
+on:
+  push:
+    branches:
+      - run_tests
+  schedule:
+   - cron:  '30 4 * * *' # every day at 4:30 UTC
+
+jobs:
+  run_tests:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+
+    runs-on: ${{ matrix.os }}
+    defaults:
+      run:
+        shell: ${{ matrix.os == 'windows-latest' && 'C:\shells\msys2bash.cmd {0}' || 'bash {0}' }}
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Run
+      shell: bash
+      run: .github/scripts/run_tests.sh