使用带有Nunit的Excel数据源进行单元测试

Question

I need to test some classes with Nunit by importing data from excel data source in C#,I couldn't find any helpful resource to guide me ,Is there any solution? Consider this test in Nunit

[Test]
[TestCase(new[] { -4, -3, -3, -2, -1, 0, 1, 2, 2, 3, 4 }, 
          new []{1, 0, 1, 0,1, 0, 1, 1, 0, 1, 0})]
public void YourTest(int[] given, int[] expected)  
{ 
///some code
} 

I would read data from excel, If I have one excel files I put the given Values in first column and expected values in second column:

column1(in Excel)  column2(in Excel)
-4                      1
-3                      0
-3                      1
-2                      0
-1                      1
0                       0
1                       1
2                       1 
2                       0
3                       1
4                       0

The reason I want to test with excel because I need to apply some formula on column1 and my formula results appers on column2 and I don't like to copy from excel to my test class.

In MsTest we have :

[TestMethod]
  [Owner("Name")]
  [TestProperty("TestCategory", "Developer"),
      DataSource("Microsoft.ACE.OLEDB.12.0",
     "Data Source=C:/Sheets/DataSheet.xlsx;Extended Properties=Excel 12.0;",
     "[Sheet1$]",
     DataAccessMethod.Sequential)]

Do we have the same thing in Nunit ,Or we need to simulate ? How we can simpuate it ? In [Setup] section or in [TestMethod]

Answer 1

If your question is "how do I read data from Excel" and you don't care about formatting (ie you only want the data) then your best bet is probably OleDb. It's about the quickest and easiest way to code data retrieval from Excel.

Have a look here for a quick tutorial. It should give you everything you need.

Once you have an idea of how it works, if you run into any trouble then there are plenty of answers on this site to help you out.

Answer 2

Use EPPlus and you can easily read excel files, something like this :

var ep = new ExcelPackage(new FileInfo("c:\\path-to-excel\\data.xslx"));
ExcelWorksheet ws = ep.Workbook.Worksheets["Sheet1"];

// first row is column name, array indexer goes from 1 
for (int i = 2; i < ws.Dimension.End.Row; i++)
{
  int given = (int)ws.Cells[i, 1].Value;
  int expected = (int)ws.Cells[i, 2].Value;
  YourTest(given, expected);
}