Clean up libcutils/libutils tests.

Move tests in the same directory as the corresponding code, so it's
easier to see what is/isn't tested.

Fix naming of libcutils_tests (plural) to match the singular that's more
common (even though the plural makes more sense to me).

Add these two to system/core/'s TEST_MAPPING.

Remove obsolete AndroidTest.xml.

Fix a flaky (timing-dependent) libcutils test.

Test: ran tests
Change-Id: I7e0a31ff45c8a152562bf66fc97161594249366e

1 files changed, 139 insertions, 0 deletions

diff --git a/libutils/Vector_test.cpp b/libutils/Vector_test.cpp
new file mode 100644
index 000000000..5336c40c3
--- /dev/null
+++ b/libutils/Vector_test.cpp
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#define LOG_TAG "Vector_test"
+
+#define __STDC_LIMIT_MACROS
+#include <stdint.h>
+#include <unistd.h>
+
+#include <android/log.h>
+#include <gtest/gtest.h>
+#include <utils/Vector.h>
+
+namespace android {
+
+class VectorTest : public testing::Test {
+protected:
+    virtual void SetUp() {
+    }
+
+    virtual void TearDown() {
+    }
+
+public:
+};
+
+
+TEST_F(VectorTest, CopyOnWrite_CopyAndAddElements) {
+
+    Vector<int> vector;
+    Vector<int> other;
+    vector.setCapacity(8);
+
+    vector.add(1);
+    vector.add(2);
+    vector.add(3);
+
+    EXPECT_EQ(3U, vector.size());
+
+    // copy the vector
+    other = vector;
+
+    EXPECT_EQ(3U, other.size());
+
+    // add an element to the first vector
+    vector.add(4);
+
+    // make sure the sizes are correct
+    EXPECT_EQ(4U, vector.size());
+    EXPECT_EQ(3U, other.size());
+
+    // add an element to the copy
+    other.add(5);
+
+    // make sure the sizes are correct
+    EXPECT_EQ(4U, vector.size());
+    EXPECT_EQ(4U, other.size());
+
+    // make sure the content of both vectors are correct
+    EXPECT_EQ(vector[3], 4);
+    EXPECT_EQ(other[3], 5);
+}
+
+TEST_F(VectorTest, SetCapacity_Overflow) {
+  Vector<int> vector;
+  EXPECT_DEATH(vector.setCapacity(SIZE_MAX / sizeof(int) + 1), "Assertion failed");
+}
+
+TEST_F(VectorTest, SetCapacity_ShrinkBelowSize) {
+  Vector<int> vector;
+  vector.add(1);
+  vector.add(2);
+  vector.add(3);
+  vector.add(4);
+
+  vector.setCapacity(8);
+  ASSERT_EQ(8U, vector.capacity());
+  vector.setCapacity(2);
+  ASSERT_EQ(8U, vector.capacity());
+}
+
+TEST_F(VectorTest, _grow_OverflowSize) {
+  Vector<int> vector;
+  vector.add(1);
+
+  // Checks that the size calculation (not the capacity calculation) doesn't
+  // overflow : the size here will be (1 + SIZE_MAX).
+  EXPECT_DEATH(vector.insertArrayAt(nullptr, 0, SIZE_MAX), "new_size overflow");
+}
+
+TEST_F(VectorTest, _grow_OverflowCapacityDoubling) {
+  Vector<int> vector;
+
+  // This should fail because the calculated capacity will overflow even though
+  // the size of the vector doesn't.
+  EXPECT_DEATH(vector.insertArrayAt(nullptr, 0, (SIZE_MAX - 1)), "new_capacity overflow");
+}
+
+TEST_F(VectorTest, _grow_OverflowBufferAlloc) {
+  Vector<int> vector;
+  // This should fail because the capacity * sizeof(int) overflows, even
+  // though the capacity itself doesn't.
+  EXPECT_DEATH(vector.insertArrayAt(nullptr, 0, (SIZE_MAX / 2)), "new_alloc_size overflow");
+}
+
+TEST_F(VectorTest, editArray_Shared) {
+  Vector<int> vector1;
+  vector1.add(1);
+  vector1.add(2);
+  vector1.add(3);
+  vector1.add(4);
+
+  Vector<int> vector2 = vector1;
+  ASSERT_EQ(vector1.array(), vector2.array());
+  // We must make a copy here, since we're not the exclusive owners
+  // of this array.
+  ASSERT_NE(vector1.editArray(), vector2.editArray());
+
+  // Vector doesn't implement operator ==.
+  ASSERT_EQ(vector1.size(), vector2.size());
+  for (size_t i = 0; i < vector1.size(); ++i) {
+    EXPECT_EQ(vector1[i], vector2[i]);
+  }
+}
+
+} // namespace android