问Junit测试运行冻结

EN

public class primcheck {

    public boolean prim(int n) {
        int nr=0;
        int i;
        while(nr==0) {
            for(i=2;i<=n/2;i++) {
                if(n%i==0) nr++;
            }

        }
        if(nr==0) return true;
         return false;


    }       
}

import static org.junit.jupiter.api.Assertions.*;

import org.junit.jupiter.api.Test;

class primeTest {

    @Test
    void test() {
        primcheck pc = new primcheck();
        boolean output = pc.prim(5);
        assertEquals(false,output);
    }

}