Rewrite negative const tests into a few multi tests.

tests/language/src/FinalSyntaxTest.dart

Index: tests/language/src/FinalSyntaxTest.dart
diff --git a/tests/language/src/FinalSyntaxTest.dart b/tests/language/src/FinalSyntaxTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..cfe52ebc8d74b10c4970ddc41afc5e0abdf6df68
--- /dev/null
+++ b/tests/language/src/FinalSyntaxTest.dart
@@ -0,0 +1,73 @@
+// 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.
+
+main() {
+  final f0 = 42;
+  final f1; /// 01: compile-time error
+  final int f2 = 87;
+  final int f3; /// 02: compile-time error
+  Expect.equals(42, f0);
+  Expect.equals(87, f2);
+
+  Expect.equals(42, F0); /// 03: compile-time error
+  Expect.equals(87, F2); /// 04: compile-time error
+
+  Expect.isTrue(P0 is Point);
+  Expect.isTrue(P1 is int);   /// 05: compile-time error
+  Expect.isTrue(P2 is Point); /// 06: compile-time error
+  Expect.isTrue(P3 is int);   /// 07: compile-time error
+
+  Expect.isTrue(A0 is int);
+  Expect.isTrue(A1 is int);
+  Expect.isTrue(A2 is int); /// 08: compile-time error
+  Expect.isTrue(A3 is int); /// 08: continued
+
+  Expect.isTrue(C0.X is C1);
+  Expect.isTrue(C0.X.x is C1); /// 09: compile-time error
+
+  Expect.equals("Hello42", B2);
+  Expect.equals("42Hello", B3); /// 10: compile-time error
+}
+
+final F0 = 42;
+final F1;                 /// 03: continued
+final int F2 = 87;
+final int F3;             /// 04: continued
+
+class Point {
+  final x, y;
+  const Point(this.x, this.y);
+  operator +(int other) => x;
+}
+
+// Check that compile time expressions can include invocations of
+// user-defined const constructors.
+final P0 = const Point(0, 0);
+final P1 = const Point(0, 0) + 1; /// 05: continued
+final P2 = new Point(0, 0);       /// 06: continued
+final P3 = new Point(0, 0) + 1;   /// 07: continued
+
+// Check that we cannot have cyclic references in compile time
+// expressions.
+final A0 = 42;
+final A1 = A0 + 1;
+final A2 = A3 + 1; /// 08: continued
+final A3 = A2 + 1; /// 08: continued
+
+class C0 {
+  static final X = const C1();
+}
+
+class C1 {
+  const C1()
+      : x = C0.X /// 09: continued
+  ;
+  final x = null;
+}
+
+// Check that sub-expressions of binary + are numeric.
+final B0 = 42;
+final B1 = "Hello";
+final B2 = B1 + B0;
+final B3 = B0 + B1; /// 10: continued