Change test into an assertion as mapLibraryName should never return null

Author: gnodet

src/main/java/org/fusesource/jansi/internal/JansiLoader.java

@@ -274,7 +274,8 @@ private static void loadJansiNativeLibrary() throws Exception {
         String jansiNativeLibraryName = System.getProperty("library.jansi.name");
         if (jansiNativeLibraryName == null) {
             jansiNativeLibraryName = System.mapLibraryName("jansi");
-            if (jansiNativeLibraryName != null && jansiNativeLibraryName.endsWith(".dylib")) {
+            assert jansiNativeLibraryName != null;
+            if (jansiNativeLibraryName.endsWith(".dylib")) {
                 jansiNativeLibraryName = jansiNativeLibraryName.replace(".dylib", ".jnilib");
             }
         }