Move MemUsage into run-test.

Change-Id: If14a75aa1a2297ea51577baa5b4ee9e654c5db1a
diff --git a/test/103-string-append/expected.txt b/test/103-string-append/expected.txt
new file mode 100644
index 0000000..f75da10
--- /dev/null
+++ b/test/103-string-append/expected.txt
@@ -0,0 +1 @@
+Test complete
diff --git a/test/103-string-append/info.txt b/test/103-string-append/info.txt
new file mode 100644
index 0000000..f8be9b4
--- /dev/null
+++ b/test/103-string-append/info.txt
@@ -0,0 +1 @@
+Simple test that triggers GC by appending to a String.
diff --git a/test/103-string-append/src/Main.java b/test/103-string-append/src/Main.java
new file mode 100644
index 0000000..12b1d8e
--- /dev/null
+++ b/test/103-string-append/src/Main.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public class Main {
+  public static final int ROUNDS = 16;
+  public static final int SIZE = 8 * 1024;
+
+  public static void main(String [] args) {
+    String s;
+    for (int j = 0; j < ROUNDS; j++) {
+      s = "";
+      for (int i = 0; i < SIZE; i++) {
+        s += "x";
+      }
+    }
+    System.out.println("Test complete");
+  }
+}