Add tests for Element#elements.

client/html/src/Lists.dart

Index: client/html/src/Lists.dart
diff --git a/client/html/src/Lists.dart b/client/html/src/Lists.dart
new file mode 100644
index 0000000000000000000000000000000000000000..e3c6626b76da101c47b706d845ae7443d443aaee
--- /dev/null
+++ b/client/html/src/Lists.dart
@@ -0,0 +1,107 @@
+// 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.
+
+// TODO(jacobr): move into a core library or at least merge with the copy
+// in client/dom/src
+class Lists {
+
+  /**
+   * Returns the index in the array [a] of the given [element], starting
+   * the search at index [startIndex] to [endIndex] (exclusive).
+   * Returns -1 if [element] is not found.
+   */
+  static int indexOf(List a,
+                     Object element,
+                     int startIndex,
+                     int endIndex) {
+    if (startIndex >= a.length) {
+      return -1;
+    }
+    if (startIndex < 0) {
+      startIndex = 0;
+    }
+    for (int i = startIndex; i < endIndex; i++) {
+      if (a[i] == element) {
+        return i;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * Returns the last index in the array [a] of the given [element], starting
+   * the search at index [startIndex] to 0.
+   * Returns -1 if [element] is not found.
+   */
+  static int lastIndexOf(List a, Object element, int startIndex) {
+    if (startIndex < 0) {
+      return -1;
+    }
+    if (startIndex >= a.length) {
+      startIndex = a.length - 1;
+    }
+    for (int i = startIndex; i >= 0; i--) {
+      if (a[i] == element) {
+        return i;
+      }
+    }
+    return -1;
+  }
+
+  static void setRange(List to, int start, int length, List from,
+      int startFrom) {
+    // TODO(nweiz): remove these IndexOutOfRange checks once Frog has bounds
+    // checking for List indexing
+    if (start < 0) {
+      throw new IndexOutOfRangeException(start);
+    } else if (startFrom < 0) {
+      throw new IndexOutOfRangeException(startFrom);
+    } else if (length < 0) {
+      throw new IllegalArgumentException("negative length $length");
+    } else if (start + length > to.length) {
+      throw new IndexOutOfRangeException(Math.min(to.length, start));
+    } else if (startFrom + length > from.length) {
+      throw new IndexOutOfRangeException(Math.min(from.length, startFrom));
+    }
+
+    for (var i = 0; i < length; i++) {
+      to[start + i] = from[startFrom + i];
+    }
+  }
+
+  static void removeRange(List a, int start, int length,
+      void removeOne(int index)) {
+    // TODO(nweiz): remove these IndexOutOfRange checks once Frog has bounds
+    // checking for List indexing
+    if (start < 0) {
+      throw new IndexOutOfRangeException(start);
+    } else if (length < 0) {
+      throw new IllegalArgumentException("negative length $length");
+    } else if (start + length > a.length) {
+      throw new IndexOutOfRangeException(Math.min(a.length, start));
+    }
+
+    for (var i = 0; i < length; i++) {
+      removeOne(start);
+    }
+  }
+
+  static List getRange(List a, int start, int length) {
+    // TODO(nweiz): remove these IndexOutOfRange checks once Frog has bounds
+    // checking for List indexing
+    if (start < 0) {
+      throw new IndexOutOfRangeException(start);
+    } else if (length < 0) {
+      throw new IllegalArgumentException("negative length $length");
+    } else if (start + length > a.length) {
+      throw new IndexOutOfRangeException(Math.min(a.length, start));
+    }
+
+    var result = [];
+    for (var i = 0; i < length; i++) {
+      result.add(a[start + i]);
+    }
+    return result;
+  }
+}