public void TestJson()
{
// arrange
mockDataFrameReaderProxy.Setup(m => m.Format(It.IsAny<string>()));
var dataFrameReader = new DataFrameReader(mockDataFrameReaderProxy.Object, sparkContext);
// act
const string path = "path/to/json";
var reader = dataFrameReader.Json(path);
// Assert
Assert.IsNotNull(reader);
mockDataFrameReaderProxy.Verify(m => m.Format("json"), Times.Once);
mockDataFrameReaderProxy.Verify(m => m.Options(
It.Is<Dictionary<string, string>>(dict => dict["path"] == path && dict.Count == 1)), Times.Once);
mockDataFrameReaderProxy.Verify(m => m.Load(), Times.Once);
}
