Replace [<TestCase>] tests with individual tests

[ErikSchierboom]

We have several places where we use [TestCase] to create a single test with multiple input values. While efficient (no code duplication), this is not the best of user experiences as it makes it harder to run a single test and also doesn't really allow us to mark the various input values with a descriptive text. It also doesn't align with how canonical data for exercises is defined, which only works on single test cases.

Consider the isogram exercises's tests:

[<TestCase("duplicates", ExpectedResult = true)>]
[<TestCase("eleven", ExpectedResult = false, Ignore = "Remove to run test case")>]
[<TestCase("subdermatoglyphic", ExpectedResult = true, Ignore = "Remove to run test case")>]
[<TestCase("Alphabet", ExpectedResult = false, Ignore = "Remove to run test case")>]
[<TestCase("thumbscrew-japingly", ExpectedResult = true, Ignore = "Remove to run test case")>]
[<TestCase("Hjelmqvist-Gryb-Zock-Pfund-Wax", ExpectedResult = true, Ignore = "Remove to run test case")>]
[<TestCase("Heizölrückstoßabdämpfung", ExpectedResult = true, Ignore = "Remove to run test case")>]
[<TestCase("the quick brown fox", ExpectedResult = false, Ignore = "Remove to run test case")>]
[<TestCase("Emily Jung Schwartzkopf", ExpectedResult = true, Ignore = "Remove to run test case")>]
[<TestCase("éléphant", ExpectedResult = false, Ignore = "Remove to run test case")>]
let ``Isogram correctly detects isograms`` (actual: string) =
    isogram actual

What's the difference between test case one and two? It's not immediately obvious. The canonical-data of this exercise looks much nicer. I think we should convert the [] tests to individual tests.

[robkeim]

This is also being discussed in the C# track exercism/csharp#194

[robkeim]

Here are the list of exercises using the TestCase attribute:

• acronym
• atbash-cipher
• clock
• diamond
• grep
• isogram
• largest-series-product
• luhn
• matrix
• meetup
• nth-prime
• perfect-numbers
• pig-latin
• protein-translation
• pythagorean-triplet
• raindrops
• roman-numerals
• series
• simple-linked-list

[ErikSchierboom]

Great work gathering this data @robkeim!

[balazsbotond]

I can start working on these. I will always leave a comment here before starting to convert the tests for an exercise - this way you'll know which ones are still up for grabs :)

[robkeim]

Sounds great, thanks @balazsbotond.

[ErikSchierboom]

That would be brilliant @balazsbotond!

[balazsbotond]

Done:

• acronym
• atbash-cipher
• clock
• isogram
• luhn
• nth-prime

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[robkeim]

@ErikSchierboom I'm closing this issue as this should now be obsolete with the move to using test generators.

[ErikSchierboom]

@robkeim Good point.