Issue 13549. Tweaks for arguments list completion.

editor/tools/plugins/com.google.dart.engine.services_test/src/com/google/dart/engine/services/completion/CompletionTests.java

 /*
  * Copyright (c) 2013, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 1463 matching lines @@
   }
 
   public void testCommentSnippets090() throws Exception {
     test("class X { f() { var a = 'x'; a.!1 }}", "1+length");
   }
 
   public void testCompletion_alias_field() throws Exception {
     test("typedef int fnint(int k); fn!1int x;", "1+fnint");
   }
 
+  public void testCompletion_arguments_ignoreEmpty() throws Exception {
+    test(src(//
+        "class A {",
+        "  test() {}",
+        "}",
+        "main(A a) {",
+        "  a.test(!1);",
+        "}"), "1-test");
+  }
+
   public void testCompletion_as_asIdentifierPrefix() throws Exception {
     test(src(//
         "main(p) {",
         "  var asVisible;",
         "  var v = as!1;",
         "}"), "1+asVisible");
   }
 
   public void testCompletion_as_asPrefixedIdentifierStart() throws Exception {
     test(src(//
@@ skipping 36 matching lines @@
   }
 
   public void testCompletion_combinator_usePrefix() throws Exception {
     test("import 'dart:math' show s!1", "1+sin", "1+sqrt", "1-cos", "1-String");
   }
 
   public void testCompletion_constructor_field() throws Exception {
     test("class X { X(this.field); int f!1ield;}", "1+field");
   }
 
+  public void testCompletion_constructorArguments_showOnlyCurrent() throws Exception {
+    test(src(//
+        "class A {",
+        "  A.first(int p);",
+        "  A.second(double p);",
+        "}",
+        "main() {",
+        "  new A.first(!1);",
+        "}"), "1+A.first", "1-A.second");
+  }
+
   public void testCompletion_double_inFractionPart() throws Exception {
     test(src(//
         "main() {",
         "  1.0!1",
         "}"), "1-abs", "1-main");
   }
 
   public void testCompletion_export_dart() throws Exception {
     test(
         src(//
@@ skipping 335 matching lines @@
   public void testCompletion_while() throws Exception {
     test("class Foo { int boo = 7; mth() { while (b!1) {} }}", "1+boo");
   }
 
   // TODO Improve proposals for optional params.
   public void testSingle() throws Exception {
     test("class A {int x; !2mth() {int y = this.x;}}class B{}", "2+B");
   }
 
 }