NUnit Test with an array of values

You can use FactoryAttribute on test method, instead of ValuesAttribute on param. Read more about this here.

Edit: Alexander is right. FactoryAttribute was a temporary part of API. The right path is to use TestCaseSourceAttribute.

TestCaseSource attribute is suitable here.

See example:

private string[] commonCases = { "Val1", "Val2", "Val3" };

[Test]
[TestCaseSource(nameof(commonCases))]
public void Test1(string value)
{
    ....
}

[Test]
[TestCaseSource(nameof(commonCases))]
public void Test12(string value)
{
    ....
}