#121 added autocompletion tests when cannot instantiate command class

remkop · Aug 23, 2017 · 731f1ac · 731f1ac
1 parent e704e78
commit 731f1ac
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Showing 2 changed files with 20 additions and 2 deletions.
diff --git a/src/main/java/picocli/AutoComplete.java b/src/main/java/picocli/AutoComplete.java
@@ -39,8 +39,7 @@
  * Generates a bash auto-complete script.
  */
 public class AutoComplete {
-    private AutoComplete() {
-    }
+    private AutoComplete() { }
 
     public static void main(String... args) { CommandLine.run(new App(), System.err, args); }
 

diff --git a/src/test/java/picocli/AutoCompleteTest.java b/src/test/java/picocli/AutoCompleteTest.java
@@ -181,6 +181,25 @@ public void testAutoCompleteAppHelp() throws Exception {
         assertEquals(AUTO_COMPLETE_APP_USAGE, actual);
     }
 
+    @Test
+    public void testAutoCompleteAppCannotInstantiate() throws Exception {
+        @Command(name = "test")
+        class TestApp {
+            public TestApp() { throw new RuntimeException();}
+        }
+
+        PrintStream originalErr = System.err;
+        ByteArrayOutputStream baos = new ByteArrayOutputStream(2500);
+        System.setErr(new PrintStream(baos));
+
+        AutoComplete.main(TestApp.class.getName());
+
+        System.setErr(originalErr);
+        String actual = new String(baos.toByteArray(), "UTF8");
+        assertTrue(actual.startsWith("java.lang.InstantiationException: picocli.AutoCompleteTest$1TestApp"));
+        assertTrue(actual.endsWith(AUTO_COMPLETE_APP_USAGE));
+    }
+
     @Test
     public void testAutoCompleteAppCompletionScriptFileWillNotOverwrite() throws Exception {
         PrintStream originalErr = System.err;