Added exception trapping in main

lib/src/main/java/com/uwyn/urlencoder/UrlEncoder.java

@@ -270,6 +270,7 @@ public final class UrlEncoder {
      * @since 1.1
      */
     public static void main(String[] arguments) {
+        try {
             var result = processMain(arguments);
             if (result.status == 0) {
                 System.out.println(result.output);
@@ -277,5 +278,9 @@ public final class UrlEncoder {
                 System.err.println(result.output);
             }
             System.exit(result.status);
+        } catch(IllegalArgumentException e) {
+            System.err.println(UrlEncoder.class.getSimpleName() + ": " + e.getMessage());
+            System.exit(1);
+        }
     }
 }

lib/src/test/java/com/uwyn/urlencoder/UrlEncoderTest.java

@@ -37,12 +37,6 @@ class UrlEncoderTest {
         );
     }
 
-    @ParameterizedTest(name = "decode({0}) should be {1}")
-    @MethodSource("validMap")
-    void testDecodeUrl(String expected, String source) {
-        assertEquals(expected, UrlEncoder.decode(source));
-    }
-
     @Test
     void testDecodeNotNeeded() {
         assertSame(same, UrlEncoder.decode(same));
@@ -50,6 +44,12 @@ class UrlEncoderTest {
         assertEquals(" ", UrlEncoder.decode(" "), "decode(' ')");
     }
 
+    @ParameterizedTest(name = "decode({0}) should be {1}")
+    @MethodSource("validMap")
+    void testDecodeUrl(String expected, String source) {
+        assertEquals(expected, UrlEncoder.decode(source));
+    }
+
     @ParameterizedTest(name = "decode({0})")
     @MethodSource("invalid")
     void testDecodeWithException(String source) {
@@ -61,6 +61,12 @@ class UrlEncoderTest {
         assertNull(UrlEncoder.decode(null), "decode(null)");
     }
 
+    @ParameterizedTest(name = "encode({0}) should be {1}")
+    @MethodSource("validMap")
+    void testEncodeUrl(String source, String expected) {
+        assertEquals(expected, UrlEncoder.encode(source));
+    }
+
     @Test
     void testEncodeWhenNoneNeeded() {
         assertSame(same, UrlEncoder.encode(same));
@@ -82,12 +88,6 @@ class UrlEncoderTest {
         assertEquals("%20", UrlEncoder.encode(" "), "encode('')");
     }
 
-    @ParameterizedTest(name = "encode({0}) should be {1}")
-    @MethodSource("validMap")
-    void testEncodeUrl(String source, String expected) {
-        assertEquals(expected, UrlEncoder.encode(source));
-    }
-
     @Test
     void testEncodeWithNulls() {
         assertNull(UrlEncoder.encode(null), "encode(null)");
@@ -147,4 +147,10 @@ class UrlEncoderTest {
         assertEquals(expected, result.output);
         assertEquals(0, result.status, "processMain(-e " + source + ").status");
     }
+
+    @Test
+    void testMainWithUnknownOptions() {
+        assertTrue(UrlEncoder.processMain(new String[]{"-p"}).output.contains("Usage :"), "processMain(-p)");
+        assertTrue(UrlEncoder.processMain(new String[]{"-"}).output.contains("Usage :"), "processMain(-)");
+    }
 }