Unit test for QRCodeUtils.class #363 (#366)

Add tests for hotspotInfo() and generateQRBitMap() of QRCodeUtils

skunkworks_crow/src/main/java/org/odk/share/utilities/QRCodeUtils.java

@@ -29,14 +29,15 @@ public class QRCodeUtils {
     public static final String PORT = "port";
     public static final String PROTECTED = "protected";
     public static final String PASSWORD = "password";
+    public static final int SIDE_LENGTH = 400;
 
     private QRCodeUtils() {
     }
 
     public static Observable<Bitmap> generateQRCode(String ssid, int port, String password) {
         return Observable.create(emitter -> {
             String qrCodeInfo = createHotspotInfo(ssid, port, password);
-            emitter.onNext(generateQRBitMap(qrCodeInfo, 400));
+            emitter.onNext(generateQRBitMap(qrCodeInfo, SIDE_LENGTH));
             emitter.onComplete();
         });
     }

skunkworks_crow/src/test/java/org/odk/share/utilities/QRCodeUtilsTest.java

@@ -0,0 +1,55 @@
+package org.odk.share.utilities;
+
+import android.graphics.Bitmap;
+
+import com.google.zxing.WriterException;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import java.io.IOException;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+@RunWith(RobolectricTestRunner.class)
+public class QRCodeUtilsTest {
+
+    /**
+     * {@link Test} create Hotspot Info of {@link QRCodeUtils}
+     */
+    @Test
+    public void createHotspotInfoTest() throws JSONException {
+        String ssid = "DeviceSSID";
+        int port = 3;
+        String password = "password";
+        String hotspotInfo = QRCodeUtils.createHotspotInfo(ssid, port, password);
+        JSONObject hotspotInfoJson = new JSONObject(hotspotInfo);
+        assertTrue(hotspotInfoJson.get(QRCodeUtils.SSID).equals(ssid));
+        assertTrue(hotspotInfoJson.getInt(QRCodeUtils.PORT) == port);
+        assertTrue(hotspotInfoJson.getBoolean(QRCodeUtils.PROTECTED));
+        assertTrue(hotspotInfoJson.get(QRCodeUtils.PASSWORD).equals(password));
+
+        password = null;
+        hotspotInfo = QRCodeUtils.createHotspotInfo(ssid, port, password);
+        hotspotInfoJson = new JSONObject(hotspotInfo);
+        assertTrue(hotspotInfoJson.get(QRCodeUtils.SSID).equals(ssid));
+        assertFalse(hotspotInfoJson.getBoolean(QRCodeUtils.PROTECTED));
+        assertTrue(hotspotInfoJson.getInt(QRCodeUtils.PORT) == port);
+    }
+
+    /**
+     * {@link Test} generate QR bitmap of {@link QRCodeUtils}
+     */
+    @Test
+    public void generateQRBitMapTest() throws IOException, WriterException {
+        String data = "Test Bitmap";
+        int sideLength = QRCodeUtils.SIDE_LENGTH;
+        Bitmap bitmap = QRCodeUtils.generateQRBitMap(data, sideLength);
+        assertTrue(bitmap.getHeight() == sideLength);
+        assertTrue(bitmap.getWidth() == sideLength);
+    }
+}