Add another test for accessing IdentityMap with SMI keys when it is _not_ empty.

test/cctest/test-identity-map.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/heap/identity-map.h"
 #include "src/zone.h"
 
 #include "test/cctest/cctest.h"
@@ skipping 105 matching lines @@
 
 
 TEST(Find_smi_not_found) {
   IdentityMapTester t;
   for (int i = 0; i < 100; i++) {
     CHECK_NULL(t.map.Find(t.smi(i)));
   }
 }
 
 
+TEST(Find_smi_not_found2) {
+  IdentityMapTester t;
+  for (int i = 1; i < 100; i++) {
+    CHECK_NULL(t.map.Find(t.smi(i)));
+  }
+  t.map.Set(t.smi(1001), &t);
+  for (int i = 1; i < 100; i++) {
+    CHECK_NULL(t.map.Find(t.smi(i)));
+  }
+}
+
+
 TEST(Find_num_not_found) {
   IdentityMapTester t;
   for (int i = 0; i < 100; i++) {
     CHECK_NULL(t.map.Find(t.num(i + 0.2)));
   }
 }
 
 
 TEST(GetFind_smi_13) {
   IdentityMapTester t;
@@ skipping 194 matching lines @@
   t.heap()->CollectGarbage(i::NEW_SPACE);
 
   // Check that searching for the numbers finds the same values.
   for (size_t i = 0; i < arraysize(num_keys); i++) {
     t.CheckFind(num_keys[i], &num_keys[i]);
     t.CheckGet(num_keys[i], &num_keys[i]);
   }
 }
 }
 }