[英]Parameterized junit testing with more than one test
參數化測試可以為您的測試提供不同的數據。 但是,我創建了一個示例計算器,我想為其創建參數化測試。 但是,我發現您只能為單個測試創建一組參數化數據。
我創建了參數化測試,用於添加具有預期結果的2個數字。 由於預期結果不同,此數據不適用於減法。
是否可以為每個測試添加,減去,乘法和除法的參數化數據?
非常感謝任何建議,
@RunWith(Parameterized.class)
public class CalculatorModelPresenterTest {
private CalculatorModel mCalculatorModel;
/* Array of tests */
@Parameterized.Parameters
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][]{
{3.0, 4.0, 7.0},
{4.0, 3.0, 7.0},
{8.0, 2.0, 10.0},
{-1.0, 4.0, 3.0},
{3256.0, 4.0, 3260.0}
});
}
private double mNumberOne;
private double mNumberTwo;
private double mExpectedResult;
/* CONSTRUCTOR THAT ASSIGNS THE FIELDS WITH THE TEST DATA */
public CalculatorModelPresenterTest(double numberOne, double numberTwo, double expectedResult) {
mNumberOne = numberOne;
mNumberTwo = numberTwo;
mExpectedResult = expectedResult;
}
/* THIS TEST WILL PASS AS THE TEST DATA IS FOR ADDING */
@Test
public void testAdd() throws Exception {
final double actualResult = mCalculatorModel.add(mNumberOne, mNumberTwo);
assertEquals(actualResult, mExpectedResult, 0);
}
/* HOWEVER, THIS TEST WILL ALWAYS FAIL AS THE TEST DATA IS CUSTOMIZED FOR THE ADD */
@Test
public void testSub() throws Exception {
final double actualResult = mCalculatorModel.sub(mNumberOne, mNumberTwo);
assertEquals(actualResult, mExpectedResult, 0);
}
@Before
public void setUp() throws Exception {
mCalculatorModel = new CalculatorModel();
}
@After
public void tearDown() throws Exception {
mCalculatorModel = null;
}
}
您可以為每個測試編寫一個內部類,每個測試都有一組不同的參數,並使用Enclosed
runner運行它。
@RunWith(Enclosed.class)
public class CalculatorModelPresenterTest {
@RunWith(Parameterized.class)
public static class Sum {
@Parameterized.Parameters
public static Object[][] data() {
return new Object[][]{
{3.0, 4.0, 7.0},
{4.0, 3.0, 7.0},
{8.0, 2.0, 10.0},
{-1.0, 4.0, 3.0},
{3256.0, 4.0, 3260.0}
};
}
@Parameterized.Parameter(0)
private double mNumberOne;
@Parameterized.Parameter(1)
private double mNumberTwo;
@Parameterized.Parameter(2)
private double mExpectedResult;
@Test
public void testAdd() throws Exception {
CalculatorModel calculatorModel = new CalculatorModel();
double actualResult = calculatorModel.add(mNumberOne, mNumberTwo);
assertEquals(actualResult, mExpectedResult, 0);
}
}
@RunWith(Parameterized.class)
public static class Difference {
@Parameterized.Parameters
public static Object[][] data() {
return new Object[][]{
{3.0, 4.0, -1.0},
{4.0, 3.0, 1.0},
{8.0, 2.0, 6.0},
{-1.0, 4.0, -5.0},
{3256.0, 4.0, 3252.0}
};
}
@Parameterized.Parameter(0)
private double mNumberOne;
@Parameterized.Parameter(1)
private double mNumberTwo;
@Parameterized.Parameter(2)
private double mExpectedResult;
@Test
public void testSub() throws Exception {
CalculatorModel calculatorModel = new CalculatorModel();
double actualResult = calculatorModel.sub(mNumberOne, mNumberTwo);
assertEquals(actualResult, mExpectedResult, 0);
}
}
}
另一種方法是使用JUnitParams運行程序 。
@RunWith(JUnitParamsRunner.class)
public class CalculatorModelPresenterTest {
@Test
@Parameters({
"3.0, 4.0, 7.0",
"4.0, 3.0, 7.0",
"8.0, 2.0, 10.0",
"-1.0, 4.0, 3.0",
"3256.0, 4.0, 3260.0" })
public void testAdd(double first, double second, double expectedResult)
throws Exception {
CalculatorModel calculatorModel = new CalculatorModel();
double actualResult = calculatorModel.add(first, second);
assertEquals(actualResult, expectedResult, 0);
}
@Test
@Parameters({
"3.0, 4.0, -1.0",
"4.0, 3.0, 1.0",
"8.0, 2.0, 6.0",
"-1.0, 4.0, -5.0",
"3256.0, 4.0, 3252.0" })
public void testSub(double first, double second, double expectedResult)
throws Exception {
CalculatorModel calculatorModel = new CalculatorModel();
double actualResult = calculatorModel.sub(first, second);
assertEquals(actualResult, expectedResult, 0);
}
}
使用JUnit 4,您不能擁有多個@Parameters
方法。 您需要使用新參數為每個操作添加一個新類。
只需添加另一個參數如下:
return Arrays.asList(new Object[][]{
{3.0, 4.0, 7.0, -1.0},
{4.0, 3.0, 7.0, 1.0},
{8.0, 2.0, 10.0, 6.0},
{-1.0, 4.0, 3.0, -5.0},
{3256.0, 4.0, 3260.0, 3252.0}
});
...
private double mExpectedSubResult;
/* CONSTRUCTOR THAT ASSIGNS THE FIELDS WITH THE TEST DATA */
public CalculatorModelPresenterTest(double numberOne, double numberTwo, double expectedResult, double expectedSubResult) {
mNumberOne = numberOne;
mNumberTwo = numberTwo;
mExpectedResult = expectedResult;
mExpectedSubResult = expectedSubResult;
}
...
/* THIS TEST WILL NOW PASS */
@Test
public void testSub() throws Exception {
final double actualResult = mCalculatorModel.sub(mNumberOne, mNumberTwo);
assertEquals(actualResult, mExpectedSubResult, 0);
}
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