Merge metadata from transaction instead of replace
This was replacing metadata when set in transactions rather
than merging. To fix this, merge has been augmented to also
report if a change occurred and to erase empty entries (as
a mechanism to "unset" metadata)
Bug: 122925737
Test: Added more unittests
Change-Id: Ia854cbcc1ddd334f18ffacea667cbb98778ec210
diff --git a/services/surfaceflinger/tests/unittests/LayerMetadataTest.cpp b/services/surfaceflinger/tests/unittests/LayerMetadataTest.cpp
index 92c9f92..75a061b 100644
--- a/services/surfaceflinger/tests/unittests/LayerMetadataTest.cpp
+++ b/services/surfaceflinger/tests/unittests/LayerMetadataTest.cpp
@@ -62,17 +62,6 @@
metadata.mMap[2] = std::vector<uint8_t>{'a', 'b'};
ASSERT_EQ(0, metadata.getInt32(2, 0));
- LayerMetadata second;
- std::vector<uint8_t> someData{'c', 'd', '\0'};
- second.mMap[2] = someData;
- second.setInt32(6, 5);
- metadata.merge(second);
-
- ASSERT_EQ(3, metadata.mMap.size());
- ASSERT_EQ(someData, second.mMap[2]);
- ASSERT_EQ(5, metadata.getInt32(6, 0));
- ASSERT_EQ(2, metadata.getInt32(4, 0));
-
Parcel p;
metadata.writeToParcel(&p);
LayerMetadata reconstructed;
@@ -82,5 +71,39 @@
ASSERT_EQ(metadata.mMap, reconstructed.mMap);
}
+TEST_F(LayerMetadataTest, merge) {
+ LayerMetadata metadata;
+ metadata.setInt32(4, 2);
+ metadata.mMap[2] = std::vector<uint8_t>{'a', 'b'};
+
+ LayerMetadata second;
+ std::vector<uint8_t> someData{'c', 'd', '\0'};
+ second.mMap[2] = someData;
+ second.setInt32(6, 5);
+ second.mMap[4].clear(); // will not delete if eraseEmpty is false
+ bool changed = metadata.merge(second);
+
+ ASSERT_TRUE(changed);
+ ASSERT_EQ(3, metadata.mMap.size());
+ ASSERT_EQ(someData, second.mMap[2]);
+ ASSERT_EQ(5, metadata.getInt32(6, 0));
+ ASSERT_TRUE(metadata.mMap.at(4).empty());
+
+ LayerMetadata withErase;
+ withErase.mMap[6].clear();
+ changed = metadata.merge(withErase, true /* eraseEmpty */);
+ ASSERT_TRUE(changed);
+ ASSERT_EQ(2, metadata.mMap.size());
+ ASSERT_EQ(someData, second.mMap[2]);
+ ASSERT_EQ(true, metadata.has(4));
+
+ // test for change detection
+ LayerMetadata third;
+ third.mMap[2] = someData;
+ third.mMap[5].clear();
+ changed = metadata.merge(third);
+ ASSERT_FALSE(changed);
+}
+
} // namespace
} // namespace android