public void TestSaveAsTable()
{
// arrange
mockDataFrameWriterProxy.Setup(m => m.SaveAsTable(It.IsAny <string>()));
var dataFrameWriter = new DataFrameWriter(mockDataFrameWriterProxy.Object);
const string table = "table";
// Act
dataFrameWriter.SaveAsTable(table);
// Assert
mockDataFrameWriterProxy.Verify(m => m.SaveAsTable(table), Times.Once);
}