Add tests to heif-convert (#15)

Tests that the script converts an HEIC image as intended

.github/workflows/test-heif-convert.yml

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+name: Test heif-convert
+
+on: [push, pull_request]
+
+jobs:
+  test-script:
+    name: Test Script
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install heif-convert
+        run: pip3 install .
+
+      - name: Add executable permission to test-script
+        working-directory: tests
+        run: chmod +x test-script.sh
+
+      - name: Run Test
+        working-directory: tests
+        run: ./test-script.sh
+
+  test-docker-image:
+    name: Test Docker Image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build Docker Image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: false
+          tags: nevermendel/heif-convert
+
+      - name: Add executable permission to test-docker-image
+        working-directory: tests
+        run: chmod +x test-docker-image.sh
+
+      - name: Run Test
+        working-directory: tests
+        run: ./test-docker-image.sh

tests/test-docker-image.sh

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+#!/bin/bash
+
+docker run -v "$(pwd)":/usr/app/out --rm nevermendel/heif-convert image.heic -f jpg -q 90
+docker run -v "$(pwd)":/usr/app/out --rm nevermendel/heif-convert image.heic -f png
+
+status_code=0
+
+expected_jpg_hash="3fb5fff1c6bb5f0f5d76d9839f82564d857e81f71e748da1ec480affde10fa8e"
+actual_jpg_hash=$(sha256sum image.jpg | awk '{print $1}')
+
+if [ "$expected_jpg_hash" != "$actual_jpg_hash" ]; then
+  echo "JPG image hash differs from expected. Expected: ${expected_jpg_hash}, Actual: ${actual_jpg_hash}"
+  status_code=1
+fi
+
+expected_png_hash="f6e29566f59bcce7d0486c9745602354cd903da0dbfce3facb8bba476abeee54"
+actual_png_hash=$(sha256sum image.png | awk '{print $1}')
+
+if [ "$expected_png_hash" != "$actual_png_hash" ]; then
+  echo "PNG image hash differs from expected. Expected: ${expected_png_hash}, Actual: ${actual_png_hash}"
+  status_code=1
+fi
+
+exit $status_code

tests/test-script.sh

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+#!/bin/bash
+
+heif-convert image.heic -f jpg -q 90
+heif-convert image.heic -f png
+
+status_code=0
+
+expected_jpg_hash="3fb5fff1c6bb5f0f5d76d9839f82564d857e81f71e748da1ec480affde10fa8e"
+actual_jpg_hash=$(sha256sum image.jpg | awk '{print $1}')
+
+if [ "$expected_jpg_hash" != "$actual_jpg_hash" ]; then
+  echo "JPG image hash differs from expected. Expected: ${expected_jpg_hash}, Actual: ${actual_jpg_hash}"
+  status_code=1
+fi
+
+expected_png_hash="f6e29566f59bcce7d0486c9745602354cd903da0dbfce3facb8bba476abeee54"
+actual_png_hash=$(sha256sum image.png | awk '{print $1}')
+
+if [ "$expected_png_hash" != "$actual_png_hash" ]; then
+  echo "PNG image hash differs from expected. Expected: ${expected_png_hash}, Actual: ${actual_png_hash}"
+  status_code=1
+fi
+
+exit $status_code