Don't use 'interface' in test files.

editor/tools/plugins/com.google.dart.tools.core_test/src/com/google/dart/tools/core/internal/model/testsource/OperatorTest.dart

Index: editor/tools/plugins/com.google.dart.tools.core_test/src/com/google/dart/tools/core/internal/model/testsource/OperatorTest.dart
diff --git a/editor/tools/plugins/com.google.dart.tools.core_test/src/com/google/dart/tools/core/internal/model/testsource/OperatorTest.dart b/editor/tools/plugins/com.google.dart.tools.core_test/src/com/google/dart/tools/core/internal/model/testsource/OperatorTest.dart
deleted file mode 100644
index 42168ca9fd65406932c571036eb4ec63b2d0399f..0000000000000000000000000000000000000000
--- a/editor/tools/plugins/com.google.dart.tools.core_test/src/com/google/dart/tools/core/internal/model/testsource/OperatorTest.dart
+++ /dev/null
@@ -1,138 +0,0 @@
-// Copyright (c) 2011, 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.
-
-class OperatorTest {
-  static int i1, i2;
-
-  OperatorTest() {}
-
-  static main() {
-    var op1 = new Operator(1);
-    var op2 = new Operator(2);
-    assert(3 == op1 + op2);
-    assert(-1 == op1 - op2);
-    assert(0.5 == op1 / op2);
-    assert(0 == op1 ~/ op2);
-    assert(2 == op1 * op2);
-    assert(1 == op1 % op2);
-    assert(!(op1 == op2));
-    assert(op1 < op2);
-    assert(!(op1 > op2));
-    assert(op1 <= op2);
-    assert(!(op1 >= op2));
-    assert(3 == (op1 | op2));
-    assert(3 == (op1 ^ op2));
-    assert(0 == (op1 & op2));
-    assert(4 == (op1 << op2));
-    assert(0 == (op1 >> op2));
-    assert(~1 == ~op1);
-    assert(-1 == -op1);
-
-    op1.value += op2.value;
-    assert(op1.value == 3);
-
-    op2.value += (op2.value += op2.value);
-    assert(6 == op2.value);
-
-    op2.value -= (op2.value -= op2.value);
-    assert(6 == op2.value);
-
-    op1.value = op2.value = 42;
-    assert(op1.value == 42);
-    assert(op2.value == 42);
-
-    i1 = i2 = 42;
-    assert(i1 == 42);
-    assert(i2 == 42);
-    i1 += 7;
-    assert(i1 == 49);
-    i1 += (i2 = 17);
-    assert(i1 == 66);
-    assert(i2 == 17);
-
-    i1 += i2 += 3;
-    assert(i1 == 86);
-    assert(i2 == 20);
-  }
-}
-
-class Operator {
-  int value;
-
-  Operator(int i) {
-    value = i;
-  }
-
-  operator +(Operator other) {
-    return value + other.value;
-  }
-
-  operator -(Operator other) {
-    return value - other.value;
-  }
-
-  operator /(Operator other) {
-    return value / other.value;
-  }
-
-  operator *(Operator other) {
-    return value * other.value;
-  }
-
-  operator %(Operator other) {
-    return value % other.value;
-  }
-
-  operator ==(Operator other) {
-    return value == other.value;
-  }
-
-  operator <(Operator other) {
-    return value < other.value;
-  }
-
-  operator >(Operator other) {
-    return value > other.value;
-  }
-
-  operator <=(Operator other) {
-    return value <= other.value;
-  }
-
-  operator >=(Operator other) {
-    return value >= other.value;
-  }
-
-  operator |(Operator other) {
-    return value | other.value;
-  }
-
-  operator ^(Operator other) {
-    return value ^ other.value;
-  }
-
-  operator &(Operator other) {
-    return value & other.value;
-  }
-
-  operator <<(Operator other) {
-    return value << other.value;
-  }
-
-  operator >>(Operator other) {
-    return value >> other.value;
-  }
-
-  operator ~/(Operator other) {
-    return value ~/ other.value;
-  }
-
-  operator ~() {
-    return ~value;
-  }
-
-  operator -() {
-    return -value;
-  }
-}