Parameterized Testing | 参数化测试

JUnit Parameterized tests      

https://github.com/junit-team/junit/wiki/Parameterized-tests

package org.ut.parameter;
public class Fibonacci {
    public static void main(String[] args) {
        int nums = compute(6);  
        System.out.println(nums);
    }
    //0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ...
    public static int compute(int n) {
        if(n==0) return 0;   
        if(n<=1) return 1;   
        return compute(n-1)+compute(n-2);
    }
}

package org.ut.parameter;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.Collection;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class FibonacciTest {
    @Parameters
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][] {

                 { 0, 0 }, { 1, 1 }, { 2, 1 }, { 3, 2 }, { 4, 3 }, { 5, 5 },{ 6, 8 }  
           });
    }
    private int fInput;
    private int fExpected;
    /*
     * Each instance of FibonacciTest will be constructed using the two-argument constructor and
     * the data values in the @Parameters method.
     */
    public FibonacciTest(int input, int expected) {
        fInput= input;
        fExpected= expected;
    }

    @Test
    public void test() {
        assertEquals(fExpected, Fibonacci.compute(fInput));
    }
}

package org.ut.parameter;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.Collection;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class FibonacciTest2 {
    /*
     * Identify Individual test cases
     * @Parameters(name = "{index}: fib({0})={1}")
     */
    @Parameters(name = "{index}: fib[{0}]={1}")
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][] {

                 { 0, 0 }, { 1, 1 }, { 2, 1 }, { 3, 2 }, { 4, 3 }, { 5, 5 },{ 6, 8 }  
           });
    }
    /*
     * It is also possible to inject data values directly into fields without
     * needing a constructor using the @Parameter annotation
     */
    @Parameter // first data value (0) is default
    public /* NOT private */ int fInput;

    @Parameter(value = 1)
    public /* NOT private */ int fExpected;

    @Test
    public void test() {
        assertEquals(fExpected, Fibonacci.compute(fInput));
    }
}

@Parameters(name = "{index}: fib[{0}]={1}")

@Parameters(name = "{index}: fib({0})={1}")

See https://bugs.eclipse.org/bugs/show_bug.cgi?id=102512