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stryker-mutator / stryker-net

Mutation testing for .NET core and .NET framework!

https://stryker-mutator.io

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String mutator #2868

Closed richardwerkman closed 1 month ago

richardwerkman commented 4 months ago

Is your feature request related to a problem? Please describe. We could add mutations to string-type method calls. I was thinking about these:

Original	Mutated
`EndsWith()`	`StartsWith()`
`StartsWith()`	`EndsWith()`
`Trim()`
`TrimEnd()`	`TrimStart()`
`TrimStart()`	`TrimEnd()`
`Substring()`
`ToUpper()`	`ToLower()`
`ToLower()`	`ToUpper()`
`ToUpperInvariant()`	`ToLowerInvariant()`
`ToLowerInvariant()`	`ToUpperInvariant()`
`PadLeft()`	`PadRight`
`PadRight()`	`PadLeft()`
`ElementAt()`
`ElementAtOrDefault()`
`Min()`	`Max()`
`Max()`	`Min()`
`MinBy()`	`MaxBy()`
`MaxBy()`	`MinBy()`

Do all of these make sense? And am I missing some?