c# - How to write the Then clause in a SpecFlow Scenario addressing a method with a Table parameter defining a set of values - S

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Considering the following Then verifying method already implemented:

/// <summary>
///     Verifies the elements of a <see cref="ComboBox" />.
/// </summary>
/// <param name="automationId">
///     The automation Id of the <see cref="ComboBox" />.
/// </param>
/// <param name="values">
///     The expected values for the <see cref="ComboBox" />.
/// </param>
[Then(@"the combobox with id ([^ ""]+) contained the following elements")]
public void VerifyComboboxContainsValues(AutomationIdString automationId,
                                         Table values)

I'm searching how to correctly write the corresponding scenario in a feature file to define the expected ComboBox values to be passed in the values Table:

So something like that:

Scenario: xxx
    Given xxx
    Then the combobox with id "SomeAutomationId" contains the following elements
"Value_1", "Value_2"... "Value_n"

Considering the following Then verifying method already implemented:

/// <summary>
///     Verifies the elements of a <see cref="ComboBox" />.
/// </summary>
/// <param name="automationId">
///     The automation Id of the <see cref="ComboBox" />.
/// </param>
/// <param name="values">
///     The expected values for the <see cref="ComboBox" />.
/// </param>
[Then(@"the combobox with id ([^ ""]+) contained the following elements")]
public void VerifyComboboxContainsValues(AutomationIdString automationId,
                                         Table values)

I'm searching how to correctly write the corresponding scenario in a feature file to define the expected ComboBox values to be passed in the values Table:

So something like that:

Scenario: xxx
    Given xxx
    Then the combobox with id "SomeAutomationId" contains the following elements
"Value_1", "Value_2"... "Value_n"

• c#
• specflow

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1 Answer 1

Sorted by: Reset to default 0

Here is how to do it:

1. Define the table in your feature file. Tables are represented by rows and columns in a pipe-delimited (|) format. SpecFlow can automatically identify that a table is being used because it looks like this:

Then the combobox with id "SomeAutomationId" contains the following elements:
    | values  |
    | Value_1 |
    | Value_2 |
    | ...     |
    | Value_n |

2. Define the step definition. You can pass in the values parameter of type Table as you have done and use it like this:

[Then(@"the combobox with id ([^ ""]+) contained the following elements:")]
public void ComboboxContainsValues(AutomationIdString automationId,
                                         Table values)
{
    _driver.ValidateComboBoxValues(automationId, values).Should().Be(true);
}

3. Define your validation logic. The idea is I can extract the values information from the rows because I made it a header in my feature file. Then once you have that information you can perform the assertion you need.

public bool ValidateComboBoxValues(AutomationIdString automationId, Table table)
{
    var expectedValues = table.Rows.Select(row => row["values"]).ToList();

    //perform assertion against ComboBox values

    return true;
}

One thing to note, is that I am a bit confused that in your feature file you have passed in the id like "SomeAutomationId" implying you are trying to pass in a string but in your step definition you have referred to it as type AutomationIdString. I would be mindful of this. If you are trying to pass in an object, you cannot do it directly like this in SpecFlow without a parameter transformation. If you are using a string, I would change the type to string in your step definition, and you should be fine.

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