added tests, overhauled implementation of Util.hex

src/test/java/de/srsoftware/widerhall/UtilTest.java

@@ -0,0 +1,44 @@
+package de.srsoftware.widerhall;
+
+import junit.framework.TestCase;
+
+import java.util.Map;
+import java.util.TreeMap;
+
+public class UtilTest extends TestCase {
+
+    public void testUrlEncode() {
+        TreeMap<String,Object> map = new TreeMap<>();
+        map.put("a",1);
+        map.put("b",2);
+        map.put("c","&");
+        map.put("d","=");
+        assertEquals("a=1&b=2&c=%26&d=%3D",Util.urlEncode(map));
+    }
+
+    public void testHex(){
+        assertEquals("00",Util.hex(0));
+        assertEquals("09",Util.hex(9));
+        assertEquals("0A",Util.hex(10));
+        assertEquals("0F",Util.hex(15));
+        assertEquals("10",Util.hex(16));
+        assertEquals("19",Util.hex(25));
+        assertEquals("FF",Util.hex(255));
+    }
+
+    public void testSha256() {
+        assertEquals("9F722959A023C02A3BA0FAFDBA81ADED642D6610EFF5DCA32DCE35132E16B6C5",Util.sha256("Dies ist ein Test"));
+    }
+
+    public void testTranslate() {
+        assertEquals("Dies ist ein Test",Util.t("{} {} {} {}","Dies","ist","ein","Test"));
+    }
+
+    public void testIsEmail() {
+        // TODO
+    }
+
+    public void testSimplePassword() {
+        // TODO
+    }
+}