message: core(test): add test for YAML parse multiple documents
  added removal of temporary file
diff: @@ -1674,4 +1674,33 @@ TEST(Core_InputOutput, FileStorage_free_file_after_exception)
  ASSERT_EQ(0, std::remove(fileName.c_str()));
  }
  +TEST(Core_InputOutput, FileStorage_YAML_parse_multiple_documents)
  +{
  + const std::string filename = "FileStorage_YAML_parse_multiple_documents.yml";
  + FileStorage fs;
  +
  + fs.open(filename, FileStorage::WRITE);
  + fs << "a" << 42;
  + fs.release();
  +
  + fs.open(filename, FileStorage::APPEND);
  + fs << "b" << 1988;
  + fs.release();
  +
  + fs.open(filename, FileStorage::READ);
  +
  + EXPECT_EQ(42, (int)fs["a"]);
  + EXPECT_EQ(1988, (int)fs["b"]);
  +
  + EXPECT_EQ(42, (int)fs.root(0)["a"]);
  + EXPECT_TRUE(fs.root(0)["b"].empty());
  +
  + EXPECT_TRUE(fs.root(1)["a"].empty());
  + EXPECT_EQ(1988, (int)fs.root(1)["b"]);
  +
  + fs.release();
  +
  + ASSERT_EQ(0, std::remove(filename.c_str()));
  +}
  +
  }} // namespace
  