add test

Author: madsodgaard

Samples/SwiftJavaExtractJNISampleApp/Sources/MySwiftLibrary/MySwiftLibrary.swift

@@ -52,6 +52,14 @@ public func echoUnsignedInt(i: UInt32, j: UInt64) -> UInt64 {
   return UInt64(i) + j
 }
 
+public func returnUnsignedByte(b: UInt8) -> UInt8 {
+  return b
+}
+
+public func returnLargestUnsignedByte() -> UInt8 {
+  return UInt8.max
+}
+
 // ==== Internal helpers
 
 func p(_ msg: String, file: String = #fileID, line: UInt = #line, function: String = #function) {

Samples/SwiftJavaExtractJNISampleApp/src/test/java/com/example/swift/MySwiftLibraryTest.java

@@ -68,4 +68,14 @@ void globalUnsignedIntEcho() {
         long l = 1200;
         assertEquals(1212, MySwiftLibrary.echoUnsignedInt(12, 1200));
     }
+
+    @Test
+    void returnUnsignedByte_negative() {
+        assertEquals(-50, MySwiftLibrary.returnUnsignedByte((byte) -50));
+    }
+
+    @Test
+    void returnLargestUnsignedByte() {
+        assertEquals(-1, MySwiftLibrary.returnLargestUnsignedByte());
+    }
 }