Add a test that reproduces issue 2998

The bug fix is https://aomedia-review.googlesource.com/c/aom/+/134604.

The test is adapted from the reproducer test case attached to the bug
report.

BUG=aomedia:2998

Change-Id: I8c540db10c9f176aa353be5a48b2b925c0a89701

test/aom_image_test.cc

diff --git a/test/aom_image_test.cc b/test/aom_image_test.cc
new file mode 100644
index 0000000..7ff82d7
--- /dev/null
+++ b/test/aom_image_test.cc
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2021, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include "aom/aom_image.h"
+#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
+
+TEST(AomImageTest, AomImgWrapInvalidAlign) {
+  const int kWidth = 128;
+  const int kHeight = 128;
+  unsigned char buf[kWidth * kHeight * 3];
+
+  aom_image_t img;
+  // Set img_data and img_data_owner to junk values. aom_img_wrap() should
+  // not read these values on failure.
+  img.img_data = (unsigned char *)"";
+  img.img_data_owner = 1;
+
+  aom_img_fmt_t format = AOM_IMG_FMT_I444;
+  // 'align' must be a power of 2 but is not. This causes the aom_img_wrap()
+  // call to fail. The test verifies we do not read the junk values in 'img'.
+  unsigned int align = 31;
+  EXPECT_EQ(aom_img_wrap(&img, format, kWidth, kHeight, align, buf), nullptr);
+}

test/test.cmake

diff --git a/test/test.cmake b/test/test.cmake
index 9d25753..9305d18 100644
--- a/test/test.cmake
+++ b/test/test.cmake
@@ -25,6 +25,7 @@
 
 list(APPEND AOM_UNIT_TEST_COMMON_SOURCES
             "${AOM_ROOT}/test/acm_random.h"
+            "${AOM_ROOT}/test/aom_image_test.cc"
             "${AOM_ROOT}/test/aom_integer_test.cc"
             "${AOM_ROOT}/test/av1_config_test.cc"
             "${AOM_ROOT}/test/av1_key_value_api_test.cc"