Add tests for scanning QR codes

app/src/main/java/com/beemdevelopment/aegis/helpers/QrCodeAnalyzer.java

@@ -2,8 +2,6 @@ package com.beemdevelopment.aegis.helpers;
 
 import static android.graphics.ImageFormat.YUV_420_888;
 
-import android.os.Handler;
-import android.os.Looper;
 import android.util.Log;
 import android.util.Size;
 
@@ -70,7 +68,7 @@ public class QrCodeAnalyzer implements ImageAnalysis.Analyzer {
 
             Result result = reader.decode(bitmap, hints);
             if (_listener != null) {
-                new Handler(Looper.getMainLooper()).post(() -> _listener.onQrCodeDetected(result));
+                _listener.onQrCodeDetected(result);
             }
         } catch (NotFoundException ignored) {
 

app/src/main/java/com/beemdevelopment/aegis/ui/ScannerActivity.java

@@ -3,6 +3,7 @@ package com.beemdevelopment.aegis.ui;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
+import android.os.Handler;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.widget.Toast;
@@ -170,6 +171,7 @@ public class ScannerActivity extends AegisActivity implements QrCodeAnalyzer.Lis
 
     @Override
     public void onQrCodeDetected(Result result) {
+        new Handler(getMainLooper()).post(() -> {
             if (_analysis != null) {
                 try {
                     Uri uri = Uri.parse(result.getText().trim());
@@ -187,6 +189,7 @@ public class ScannerActivity extends AegisActivity implements QrCodeAnalyzer.Lis
                             e, ((dialog, which) -> bindPreview(_cameraProvider)));
                 }
             }
+        });
     }
 
     private void handleUri(Uri uri) throws GoogleAuthInfoException {

app/src/test/java/com/beemdevelopment/aegis/helpers/QrCodeAnalyzerTest.java

@@ -0,0 +1,154 @@
+package com.beemdevelopment.aegis.helpers;
+
+import static android.graphics.ImageFormat.YUV_420_888;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import android.graphics.Rect;
+import android.media.Image;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.camera.core.ImageInfo;
+import androidx.camera.core.ImageProxy;
+
+import com.beemdevelopment.aegis.util.IOUtils;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.zip.GZIPInputStream;
+
+@RunWith(RobolectricTestRunner.class)
+public class QrCodeAnalyzerTest {
+    private static final String _expectedUri = "otpauth://totp/neo4j:Charlotte?secret=B33WS2ALPT34K4BNY24AYROE4M&issuer=neo4j&algorithm=SHA1&digits=6&period=30";
+
+    @Test
+    public void testScanQrCode() {
+        boolean found = scan("qr.y.gz", 1600, 1200, 1600);
+        assertTrue("QR code not found", found);
+    }
+
+    @Test
+    public void testScanStridedQrCode() {
+        boolean found = scan("qr.strided.y.gz", 1840, 1380, 1840);
+        assertFalse("QR code found", found);
+
+        found = scan("qr.strided.y.gz", 1840, 1380, 1856);
+        assertTrue("QR code not found", found);
+    }
+
+    private boolean scan(String fileName, int width, int height, int rowStride) {
+        AtomicBoolean found = new AtomicBoolean();
+        QrCodeAnalyzer analyzer = new QrCodeAnalyzer(result -> {
+            assertEquals(_expectedUri, result.getText());
+            found.set(true);
+        });
+
+        FakeImageProxy imgProxy;
+        try (InputStream inStream = getClass().getResourceAsStream(fileName);
+             GZIPInputStream zipStream = new GZIPInputStream(inStream)) {
+            imgProxy = new FakeImageProxy(IOUtils.readAll(zipStream), width, height, rowStride);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        analyzer.analyze(imgProxy);
+        return found.get();
+    }
+
+    private static class FakePlaneProxy implements ImageProxy.PlaneProxy {
+        private final byte[] _y;
+        private final int _rowStride;
+
+        public FakePlaneProxy(byte[] y, int rowStride) {
+            _y = y;
+            _rowStride = rowStride;
+        }
+
+        @Override
+        public int getRowStride() {
+            return _rowStride;
+        }
+
+        @Override
+        public int getPixelStride() {
+            return 1;
+        }
+
+        @NonNull
+        @Override
+        public ByteBuffer getBuffer() {
+            return ByteBuffer.wrap(_y);
+        }
+    }
+
+    private static class FakeImageProxy implements ImageProxy {
+        private final byte[] _y;
+        private final int _width;
+        private final int _height;
+        private final int _rowStride;
+
+        public FakeImageProxy(byte[] y, int width, int height, int rowStride) {
+            _y = y;
+            _width = width;
+            _height = height;
+            _rowStride = rowStride;
+        }
+
+        @Override
+        public void close() {
+
+        }
+
+        @NonNull
+        @Override
+        public Rect getCropRect() {
+            return null;
+        }
+
+        @Override
+        public void setCropRect(@Nullable @org.jetbrains.annotations.Nullable Rect rect) {
+
+        }
+
+        @Override
+        public int getFormat() {
+            return YUV_420_888;
+        }
+
+        @Override
+        public int getHeight() {
+            return _height;
+        }
+
+        @Override
+        public int getWidth() {
+            return _width;
+        }
+
+        @NonNull
+        @Override
+        public ImageProxy.PlaneProxy[] getPlanes() {
+            return new PlaneProxy[]{new FakePlaneProxy(_y, _rowStride)};
+        }
+
+        @NonNull
+        @Override
+        public ImageInfo getImageInfo() {
+            return null;
+        }
+
+        @Nullable
+        @Override
+        public Image getImage() {
+            return null;
+        }
+    }
+}