🧮 Combinatorial Testing

Combinatorial testing allows you to test a method with every possible combination of input values. This is achieved using the [Matrix] attribute on test parameters.

Usage

Apply [Matrix] to one or more parameters of a [Fact] test method. Prova will automatically generate a test case for every combination (Cartesian product) of the provided values.

[Fact]
public void TestCombinations(
    [Matrix(1, 2, 3)] int x, 
    [Matrix("a", "b")] string y)
{
    // Runs 3 x 2 = 6 times:
    // (1, "a"), (1, "b")
    // (2, "a"), (2, "b")
    // (3, "a"), (3, "b")
}

Comparisons

• [InlineData]: Specifies exact rows of data. Good when specific combinations matter or others are invalid.
• [Matrix]: Specifies domains for each parameter. Good when all combinations are valid and should be tested.

Supported Types

You can use any constant value supported by attributes:

• Primitives (int, bool, double, etc.)
• string
• enums
• typeof(T)