Tables

Mostly used in Setup and Verify steps. The default behavior results in bi-dimensional array passed into the step. The types are inferred.

  Scenario: Dead cell with 0 neighbors stays dead
    Given the following setup
      | . | . | . |
      | . | . | . |
      | . | . | . |
    When I evolve the board
    Then the center cell should be "dead"

    [TestMethod]
    public void DeadCellWith0NeighborsStaysDead()
    {         
        Given_the_following_setup
        (        
            new[] {".", ".", "."},        
            new[] {".", ".", "."},        
            new[] {".", ".", "."}
        );        
        When_I_evolve_the_board();        
        Then_the_center_cell_should_be("dead");
    }

    public void Given_the_following_setup(params string[][] Cells)
    {
      ...
    }

Header

Use [ and ] on the first row to make it a header. Instead of a 2D array the step is called multiple times passing 1 row at a time. The step definition could use 1 arg per column or a params array.

  Scenario: Sum
    A plus B = C
    [A |B |C ]
    |0 |0 |0 |
    |0 |1 |1 |
    |21|21|42|

    [TestMethod]
    public void Sum()
    {         
        A_plus_B___C(0, 0, 0);        
        A_plus_B___C(0, 1, 1);        
        A_plus_B___C(21, 21, 42);
    }

    // 1 arg per value
    void A_plus_B___C(int A, int B, int C)
    {
        (A + B).ShouldBe(C);
    }
    
    // array with the values 
    void A_plus_B___C(params int[] Row)
    {
        Row.Take(Row.Length - 1)
            .Sum().ShouldBe(Row.Last());
    }