#5 - Need to filter non property command line args - IllegalArgumentException: Expecting only yaml or properties file but got [ort]

Author: rbygrave

src/main/java/io/avaje/config/load/Loader.java

@@ -127,22 +127,32 @@ private void loadViaCommandLineArgs() {
     }
   }
 
-  private void loadViaCommandLine(String[] args) {
+  void loadViaCommandLine(String[] args) {
     for (int i = 0; i < args.length; i++) {
       String arg = args[i];
       if (arg.startsWith("-P") || arg.startsWith("-p")) {
         if (arg.length() == 2 && i < args.length - 1) {
           // next argument expected to be a properties file paths
           i++;
-          loadViaPaths(args[i]);
+          loadCommandLineArg(args[i]);
         } else {
           // no space between -P and properties file paths
-          loadViaPaths(arg.substring(2));
+          loadCommandLineArg(arg.substring(2));
         }
       }
     }
   }
 
+  private void loadCommandLineArg(String arg) {
+    if (isValidExtension(arg)) {
+      loadViaPaths(arg);
+    }
+  }
+
+  private boolean isValidExtension(String arg) {
+    return arg.endsWith(".yaml") || arg.endsWith(".yml") || arg.endsWith(".properties");
+  }
+
   /**
    * Provides a way to override properties when running via main() locally.
    */
@@ -193,6 +203,10 @@ private void loadViaPaths(String paths) {
     }
   }
 
+  int size() {
+    return loadContext.size();
+  }
+
   String[] splitPaths(String location) {
     return SPLIT_PATHS.split(location);
   }

src/test/java/io/avaje/config/load/LoaderTest.java

@@ -87,4 +87,27 @@ public void splitPaths() {
     assertThat(loader.splitPaths("one;two;three")).contains("one", "two", "three");
     assertThat(loader.splitPaths("one two,three;four,five six")).contains("one", "two", "three", "four", "five", "six");
   }
+
+  @Test
+  public void loadViaCommandLine_whenNotValid() {
+    Loader loader = new Loader();
+    loader.loadViaCommandLine(new String[]{"-p","8765"});
+    assertEquals(0, loader.size());
+    loader.loadViaCommandLine(new String[]{"-port","8765"});
+    assertEquals(0, loader.size());
+
+    loader.loadViaCommandLine(new String[]{"-port"});
+    loader.loadViaCommandLine(new String[]{"-p","ort"});
+    assertEquals(0, loader.size());
+
+    loader.loadViaCommandLine(new String[]{"-p","doesNotExist.yaml"});
+    assertEquals(0, loader.size());
+  }
+
+  @Test
+  public void loadViaCommandLine_localFile() {
+    Loader loader = new Loader();
+    loader.loadViaCommandLine(new String[]{"-p","test-dummy2.yaml"});
+    assertEquals(1, loader.size());
+  }
 }