Hamcrest number comparison using between

Hamcrest number comparison using between

Hamcrest provides a way to perform number comparisons using the between matcher. You can use it to check if a number falls within a specified range. To use the between matcher, you'll need to include the Hamcrest library in your project.

Here's how to use the between matcher for number comparisons:

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.*;

public class NumberComparisonExample {
    public static void main(String[] args) {
        int value = 5;

        // Check if 'value' is between 1 (inclusive) and 10 (inclusive)
        assertThat(value, is(both(greaterThanOrEqualTo(1)).and(lessThanOrEqualTo(10))));
        
        // Check if 'value' is between 1 (exclusive) and 10 (exclusive)
        assertThat(value, is(both(greaterThan(1)).and(lessThan(10))));
    }
}

In this example:

  • We import static methods from org.hamcrest.MatcherAssert and org.hamcrest.Matchers to make the code more concise.

  • We use assertThat to perform the actual assertion.

  • We check if the value falls within the range [1, 10] (inclusive) using the both(greaterThanOrEqualTo(1)).and(lessThanOrEqualTo(10)) matcher. This checks if value is greater than or equal to 1 and less than or equal to 10.

  • We also check if the value falls within the range (1, 10) (exclusive) using the both(greaterThan(1)).and(lessThan(10)) matcher. This checks if value is greater than 1 and less than 10.

You can adjust the comparison values and matchers as needed to suit your specific requirements for number comparisons using Hamcrest.


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