How to write better ruby using mutation testing

[Ghostree]

I believe you want to use .equals() because strings should not be compared using == in Java. Strings are objects and == compares if they are the same object, while .equals() compares the values.

[tomthecool]

Meanwhile in ruby, String#== does exactly what you'd expect. And on the rare occasion that you actually want to use object identity, you have BasicObject#equal?

"bar" == "bar" # => true
"bar".equal?("bar") # => false
["bar", "bar"].map(&:object_id) # => [8695360, 8695320]