add: file sorting

app/src/test/java/com/stardust/scriptdroid/ExampleUnitTest.java

@@ -2,6 +2,15 @@ package com.stardust.scriptdroid;
 
 import org.junit.Test;
 
+import java.util.concurrent.Callable;
+
+import io.reactivex.Observable;
+import io.reactivex.annotations.NonNull;
+import io.reactivex.functions.Action;
+import io.reactivex.functions.Consumer;
+import io.reactivex.functions.Function;
+import io.reactivex.schedulers.Schedulers;
+
 /**
  * Example local unit test, which will execute on the development machine (host).
  *
@@ -17,11 +26,33 @@ public class ExampleUnitTest {
     // TODO: 2017/7/4  细节 三天 7.18
     // TODO: 2017/7/4 写文档 两天 7.20
     // TODO: 2017/7/4 发布 3.0.0 Beta 7.22
+    // TODO: 2017/9/30 想象真是美好。
 
 
     @Test
     public void test() {
-        System.out.println("SOS".hashCode());
+        Observable.fromCallable(new Callable<String>() {
+            @Override
+            public String call() throws Exception {
+                System.out.println(Thread.currentThread());
+                return "";
+            }
+        })
+                .subscribeOn(Schedulers.io())
+                .observeOn(Schedulers.newThread())
+                .doOnComplete(new Action() {
+                    @Override
+                    public void run() throws Exception {
+                        System.out.println(Thread.currentThread());
+                    }
+                })
+                .observeOn(Schedulers.newThread())
+                .subscribe(new Consumer<String>() {
+                    @Override
+                    public void accept(@NonNull String s) throws Exception {
+                        System.out.println(Thread.currentThread());
+                    }
+                });
     }
 
     @Test