- Add test for format rfidCardNumber in ScanResultActivity

- Change setting for dataBinding in gradle

app/build.gradle

@@ -13,8 +13,8 @@ android {
         versionName gitVersionName
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
-    viewBinding {
-        enabled = true
+    buildFeatures {
+        viewBinding = true
     }
     signingConfigs {
         release {

app/src/main/java/com/fusi24/rfid/ui/scanresult/ScanResultActivity.java

@@ -60,7 +60,7 @@ public class ScanResultActivity extends BaseActivity implements ScanResultView {
         // Setting digit rfid card using MAX_NUMBER = 10
         /* FORMAT "%010d"
         * % ==> used as formatter, 0 ==> used to pad with zeroes instead of spaces
-        * 10 ==> minimum of 10 characters wide
+        * 10 ==> maximum of 10 characters wide
         * d ==> as a decimal integer */
         if (numberRfidTemp != null){
             if (numberRfidTemp.length() < 10){

app/src/test/java/com/fusi24/rfid/ScanResultUnitTest.java

@@ -0,0 +1,80 @@
+package com.fusi24.rfid;
+
+import org.junit.Test;
+
+import java.util.Locale;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ScanResultUnitTest {
+
+    private String numberRfid = "";
+
+    @Test
+    public void formatOneDigit() {
+        numberRfid = addZeroToDigit(1);
+        assertEquals("0000000001", numberRfid);
+    }
+
+    @Test
+    public void formatTwoDigit() {
+        numberRfid = addZeroToDigit(12);
+        assertEquals("0000000012", numberRfid);
+    }
+
+    @Test
+    public void formatThreeDigit() {
+        numberRfid = addZeroToDigit(123);
+        assertEquals("0000000123", numberRfid);
+    }
+
+    @Test
+    public void formatFourDigit() {
+        numberRfid = addZeroToDigit(1234);
+        assertEquals("0000001234", numberRfid);
+    }
+
+    @Test
+    public void formatFiveDigit() {
+        numberRfid = addZeroToDigit(12345);
+        assertEquals("0000012345", numberRfid);
+    }
+
+    @Test
+    public void formatSixDigit() {
+        numberRfid = addZeroToDigit(123456);
+        assertEquals("0000123456", numberRfid);
+    }
+
+    @Test
+    public void formatSevenDigit() {
+        numberRfid = addZeroToDigit(1234567);
+        assertEquals("0001234567", numberRfid);
+    }
+
+    @Test
+    public void formatEightDigit() {
+        numberRfid = addZeroToDigit(12345678);
+        assertEquals("0012345678", numberRfid);
+    }
+
+    @Test
+    public void formatNineDigit() {
+        numberRfid = addZeroToDigit(123456789);
+        assertEquals("0123456789", numberRfid);
+    }
+
+    // Call this method if digit < 10
+    private String addZeroToDigit(Integer number){
+        /* FORMAT "%010d"
+         * % ==> used as formatter, 0 ==> used to pad with zeroes instead of spaces
+         * 10 ==> maximum of 10 characters wide
+         * d ==> as a decimal integer */
+        return String.format(Locale.getDefault(), "%010d", number);
+    }
+}