Establish order of methods in source code

Author: spannm

src/test/java/io/github/spannm/leetcode/tool/UnitTestCreator.java

@@ -182,18 +182,17 @@ boolean createUnitTest(Class<?> _clazz) throws IOException {
     }
 
     Method findTestMethod(Class<?> _clazz) {
-        Method[] methods = _clazz.getDeclaredMethods();
-        if (methods.length == 0) {
-            methods = Arrays.stream(_clazz.getDeclaredClasses())
+        List<Method> list = Arrays.stream(_clazz.getDeclaredMethods().length > 0 ? _clazz.getDeclaredMethods() :
+            Arrays.stream(_clazz.getDeclaredClasses())
                 .filter(c -> Modifier.isStatic(c.getModifiers()))
                 .map(Class::getDeclaredMethods)
                 .filter(arr -> arr.length > 0)
                 .findFirst().orElseThrow(
-                    () -> new LeetcodeRuntimeException("No non-static methods found in inner classes of " + _clazz));
-        }
-        return Arrays.stream(methods)
+                    () -> new LeetcodeRuntimeException("No non-static methods found in inner classes of " + _clazz)))
             .filter(m -> !Modifier.isStatic(m.getModifiers()))
-            .filter(m -> !Modifier.isPrivate(m.getModifiers()))
+            .filter(m -> !Modifier.isPrivate(m.getModifiers())).collect(Collectors.toCollection(ArrayList::new));
+        return IntStream.rangeClosed(1, list.size())
+            .mapToObj(i -> list.get(list.size() - i)) // establish order of methods in source code
             .min(Comparator.comparingInt(Method::getModifiers)
                 // prioritize non-void return types
                 .thenComparing((m1, m2) -> Integer.compare(m1.getReturnType() == void.class ? -1 : 1, m2.getReturnType() == void.class ? -1 : 1)))