WillemJiang commented on a change in pull request #10: SCB-1400 Complement and 
improve unit test
URL: https://github.com/apache/servicecomb-toolkit/pull/10#discussion_r309008963
 
 

 ##########
 File path: 
common/src/test/java/org/apache/servicecomb/toolkit/common/FileUtilsTest.java
 ##########
 @@ -32,33 +33,44 @@
 
   @Test
   public void createDirectoryTest() {
-    try {
-      FileUtils.createDirectory(null);
-    } catch (IOException e) {
-      assertEquals("Path is null", e.getMessage());
-    }
-
     Path path;
     try {
       path = Files.createTempDirectory("");
       FileUtils.createDirectory(path.toFile().getCanonicalPath());
     } catch (IOException e) {
       fail("Run 'createDirectoryTest' failed and unexpected to catch 
IOException: " + e.getMessage());
     }
+
+    try {
+      FileUtils.createDirectory(null);
+    } catch (IOException e) {
+      assertEquals("Path is null", e.getMessage());
+      return;
+    }
+
+    fail("Run 'createDirectoryTest' failed, expected to catch IOException but 
not");
   }
 
   @Test
   public void getFilesGroupByFilenameTest() {
+    boolean succeed = false;
+
     try {
+      succeed = false;
       FileUtils.getFilesGroupByFilename(null);
 
 Review comment:
   It can be changed to like this 
   try {
         FileUtils.getFilesGroupByFilename(null);
         Assert.fail("Except RuntimeException Here");
       } catch (RuntimeException e) {
         assertThat(e, is(oops));
       }

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