public void TestOption()
{
// arrange
mockDataFrameReaderProxy.Setup(m => m.Options(It.IsAny<Dictionary<string, string>>()));
var dataFrameReader = new DataFrameReader(mockDataFrameReaderProxy.Object, sparkContext);
const string key = "path";
const string value = "path_value";
// Act
dataFrameReader.Option(key, value);
// Assert
mockDataFrameReaderProxy.Verify(m => m.Options(
It.Is<Dictionary<string, string>>(dict => dict[key] == value && dict.Count == 1)), Times.Once);
}
