binderUnitTests: getOpenAshmemSize

In preparation for changing the implementation of this API, it has no
tests!

Bug: 195752513
Test: binderUnitTest
Change-Id: I4207f636b61dabbc81c5e188aa5cde0d5d1ba6ee

2 files changed, 18 insertions, 1 deletions

diff --git a/libs/binder/tests/Android.bp b/libs/binder/tests/Android.bp
index 680f0edd51..86da5887a8 100644
--- a/libs/binder/tests/Android.bp
+++ b/libs/binder/tests/Android.bp
@@ -87,6 +87,7 @@ cc_test {
     srcs: ["binderParcelUnitTest.cpp", "binderBinderUnitTest.cpp"],
     shared_libs: [
         "libbinder",
+        "libcutils",
         "libutils",
     ],
     test_suites: ["general-tests"],
diff --git a/libs/binder/tests/binderParcelUnitTest.cpp b/libs/binder/tests/binderParcelUnitTest.cpp
index 841d47b264..4950b23858 100644
--- a/libs/binder/tests/binderParcelUnitTest.cpp
+++ b/libs/binder/tests/binderParcelUnitTest.cpp
@@ -14,8 +14,9 @@
  * limitations under the License.
  */
 
-#include <binder/Parcel.h>
 #include <binder/IPCThreadState.h>
+#include <binder/Parcel.h>
+#include <cutils/ashmem.h>
 #include <gtest/gtest.h>
 
 using android::IPCThreadState;
@@ -146,3 +147,18 @@ TEST_READ_WRITE_INVERSE(char16_t, Char, {u'a', u'\0'});
 TEST_READ_WRITE_INVERSE(int8_t, Byte, {-1, 0, 1});
 TEST_READ_WRITE_INVERSE(String8, String8, {String8(), String8("a"), String8("asdf")});
 TEST_READ_WRITE_INVERSE(String16, String16, {String16(), String16("a"), String16("asdf")});
+
+TEST(Parcel, GetOpenAshmemSize) {
+    constexpr size_t kSize = 1024;
+    constexpr size_t kCount = 3;
+
+    Parcel p;
+
+    for (size_t i = 0; i < kCount; i++) {
+        int fd = ashmem_create_region("test-getOpenAshmemSize", kSize);
+        ASSERT_GE(fd, 0);
+        ASSERT_EQ(OK, p.writeFileDescriptor(fd, true /* take ownership */));
+
+        ASSERT_EQ((kSize * (i + 1)), p.getOpenAshmemSize());
+    }
+}