diff options
Diffstat (limited to 'tests/Writer32Test.cpp')
-rw-r--r-- | tests/Writer32Test.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/tests/Writer32Test.cpp b/tests/Writer32Test.cpp index a471099b38..f9b6f6a03f 100644 --- a/tests/Writer32Test.cpp +++ b/tests/Writer32Test.cpp @@ -280,3 +280,36 @@ DEF_TEST(Writer32_misc, reporter) { test_ptr(reporter); test_rewind(reporter); } + +DEF_TEST(Writer32_snapshot, reporter) { + int32_t array[] = { 1, 2, 4, 11 }; + SkSWriter32<sizeof(array) + 4> writer; + writer.write(array, sizeof(array)); + check_contents(reporter, writer, array, sizeof(array)); + const void* beforeData = writer.contiguousArray(); + SkAutoDataUnref snapshot(writer.snapshotAsData()); + // check the snapshot forced a copy of the static data + REPORTER_ASSERT(reporter, snapshot->data() != beforeData); + REPORTER_ASSERT(reporter, snapshot->size() == writer.bytesWritten()); +} + +DEF_TEST(Writer32_snapshot_dynamic, reporter) { + int32_t array[] = { 1, 2, 4, 11 }; + SkWriter32 writer; + writer.write(array, sizeof(array)); + check_contents(reporter, writer, array, sizeof(array)); + // force a capacity increase so we can test COW behaviour + writer.write(array, sizeof(array)); + writer.rewindToOffset(sizeof(array)); + const void* beforeData = writer.contiguousArray(); + SkAutoDataUnref snapshot(writer.snapshotAsData()); + // check the snapshot still points to the same data as the writer + REPORTER_ASSERT(reporter, writer.contiguousArray() == beforeData); + REPORTER_ASSERT(reporter, snapshot->data() == beforeData); + REPORTER_ASSERT(reporter, snapshot->size() == writer.bytesWritten()); + // write more data that would fit in the buffer + writer.write(array, sizeof(array)); + // test it triggered COW anyway + REPORTER_ASSERT(reporter, writer.contiguousArray() != beforeData); +} + |