Added #116 Show invalid utf-8 bytes in Strings as {invalid_utf8:xxx}

libsrc/ffdec_lib/test/com/jpexs/helpers/Utf8HelperTest.java

@@ -0,0 +1,46 @@
+/*
+ *  Copyright (C) 2010-2023 JPEXS, All rights reserved.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3.0 of the License, or (at your option) any later version.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.
+ */
+package com.jpexs.helpers;
+
+import com.jpexs.helpers.utf8.Utf8Helper;
+import org.testng.Assert;
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+/**
+ *
+ * @author JPEXS
+ */
+public class Utf8HelperTest {
+    @DataProvider(name = "samples")
+    public static Object[][] provideSamples() {
+        return new Object[][]{
+                {new byte[] {'A'}, "A"},
+                {new byte[] {'A', (byte)0b10000111, 'B'}, "A{invalid_utf8:135}B"},
+                {new byte[] {'A', (byte)0b11000101, (byte)0b10011001, 'B'}, "AřB"},
+                {new byte[] {'A', (byte)0b11100000, (byte)0b10100000, (byte)0b10000000, 'B'}, "A" + (char)0x0800 + "B"},                
+                {new byte[] {'A', (byte)0b11110000, (byte)0b10011101, (byte) 0b10010011, (byte)0b10101100, 'B'}, "A𝓬B"},
+                {new byte[] {'A', (byte)0b11000101}, "A{invalid_utf8:197}"},
+                {new byte[] {'A', (byte)0b11000101, 'B'}, "A{invalid_utf8:197}B"}                
+                };
+    }
+    
+    @Test(dataProvider = "samples")
+    public void testInvalidBytes(byte[] data, String expected) {
+        Assert.assertEquals(Utf8Helper.decode(data), expected);        
+    }
+}