How do you test code that uses var (local variable type inference)?

In Java, when using local variable type inference with the `var` keyword, testing your code involves ensuring that your logic and data manipulation remain correct regardless of the type inferred by the compiler. This can be accomplished through unit tests, which check the functionality of methods and variables that utilize `var`.

A common approach to testing code with `var` is to write unit tests using a testing framework like JUnit. The tests can examine the expected behavior of methods that contain local variables defined with `var`, ensuring that the logic remains valid even when the variable type is not explicitly declared.

Here’s an example of how you might test a method that uses `var`:


    // Example of testing Java code with 'var'
    import org.junit.jupiter.api.Test;
    import static org.junit.jupiter.api.Assertions.assertEquals;

    public class VarExampleTest {
        @Test
        public void testLocalVariableInference() {
            var number = 10;
            var result = square(number);
            assertEquals(100, result);
        }

        private int square(var num) {
            return num * num;
        }
    }

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How do you test code that uses var (local variable type inference)?

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How do you test code that uses var (local variable type inference)?

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