pkg/matcher: refactored code around data-structure vs execution-based matchers

pkg/matcher/test/operator_matchers_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library matcher.operator_matchers_test;
 
 import 'package:matcher/matcher.dart';
 import 'package:unittest/unittest.dart' show test, group;
 
 import 'test_utils.dart';
 
 void main() {
   initUtils();
 
   test('anyOf', () {
+    // with a list
     shouldFail(0, anyOf([equals(1), equals(2)]),
         "Expected: (<1> or <2>) Actual: <0>");
     shouldPass(1, anyOf([equals(1), equals(2)]));
+
+    // with individual items
+    shouldFail(0, anyOf(equals(1), equals(2)),
+        "Expected: (<1> or <2>) Actual: <0>");
+    shouldPass(1, anyOf(equals(1), equals(2)));
   });
 
   test('allOf', () {
+    // with a list
     shouldPass(1, allOf([lessThan(10), greaterThan(0)]));
     shouldFail(-1, allOf([lessThan(10), greaterThan(0)]),
         "Expected: (a value less than <10> and a value greater than <0>) "
         "Actual: <-1> "
         "Which: is not a value greater than <0>");
+
+    // with individual items
+    shouldPass(1, allOf(lessThan(10), greaterThan(0)));
+    shouldFail(-1, allOf(lessThan(10), greaterThan(0)),
+        "Expected: (a value less than <10> and a value greater than <0>) "
+        "Actual: <-1> "
+        "Which: is not a value greater than <0>");
+
+    // with maximum items
+    shouldPass(1, allOf(lessThan(10), lessThan(9), lessThan(8), lessThan(7),
+                        lessThan(6), lessThan(5), lessThan(4)));
+    shouldFail(4, allOf(lessThan(10), lessThan(9), lessThan(8), lessThan(7),
+        lessThan(6), lessThan(5), lessThan(4)),
+        "Expected: (a value less than <10> and a value less than <9> and a "
+        "value less than <8> and a value less than <7> and a value less than "
+        "<6> and a value less than <5> and a value less than <4>) "
+        "Actual: <4> "
+        "Which: is not a value less than <4>");
+  });
+
+  test('If the first argument is a List, the rest must be null', () {
+    expect(() => allOf([], 5), throwsArgumentError);
+    expect(() => anyOf([], null, null, null, null, null, 42),
+        throwsArgumentError);
   });
 }