Extend list length unit test.

runtime/vm/object_test.cc

Index: runtime/vm/object_test.cc
===================================================================
--- runtime/vm/object_test.cc	(revision 45223)
+++ runtime/vm/object_test.cc	(working copy)
@@ -1951,15 +1951,13 @@
 }
 
 
-TEST_CASE(ArrayLength) {
-  const intptr_t kLength = Array::kMaxElements + 1;
-  ASSERT(kLength >= 0);
+static void TestIllegalArrayLength(intptr_t length) {
   char buffer[1024];
   OS::SNPrint(buffer, sizeof(buffer),
       "main() {\n"
       "  new List(%" Pd ");\n"
       "}\n",
-      kLength);
+      length);
   Dart_Handle lib = TestCase::LoadTestScript(buffer, NULL);
   EXPECT_VALID(lib);
   Dart_Handle result = Dart_Invoke(lib, NewString("main"), 0, NULL);
@@ -1967,11 +1965,41 @@
       "Unhandled exception:\n"
       "Invalid argument(s): Length (%" Pd ") must be an integer "
       "in the range [0..%" Pd "].",
-      kLength, Array::kMaxElements);
+      length, Array::kMaxElements);
   EXPECT_ERROR(result, buffer);
 }
 
 
+TEST_CASE(ArrayLengthNegativeOne) { TestIllegalArrayLength(-1); }
+TEST_CASE(ArrayLengthSmiMin) { TestIllegalArrayLength(kSmiMin); }
+TEST_CASE(ArrayLengthOneTooMany) {
+  const intptr_t kOneTooMany = Array::kMaxElements + 1;
+  ASSERT(kOneTooMany >= 0);
+  TestIllegalArrayLength(kOneTooMany);
+}
+
+
+TEST_CASE(ArrayLengthMaxElements) {
+  char buffer[1024];
+  OS::SNPrint(buffer, sizeof(buffer),
+      "main() {\n"
+      "  return new List(%" Pd ");\n"
+      "}\n",
+      Array::kMaxElements);
+  Dart_Handle lib = TestCase::LoadTestScript(buffer, NULL);
+  EXPECT_VALID(lib);
+  Dart_Handle result = Dart_Invoke(lib, NewString("main"), 0, NULL);
+  if (Dart_IsError(result)) {
+    EXPECT_ERROR(result, "Out of Memory");
+  } else {
+    const intptr_t kExpected = Array::kMaxElements;
+    intptr_t actual = 0;
+    EXPECT_VALID(Dart_ListLength(result, &actual));
+    EXPECT_EQ(kExpected, actual);
+  }
+}
+
+
 TEST_CASE(StringCodePointIterator) {
   const String& str0 = String::Handle(String::New(""));
   String::CodePointIterator it0(str0);