How to use assertThrows method of org.testng.Assert class

Best Testng code snippet using org.testng.Assert.assertThrows

Source:EmptyNavigableSet.java

...62    }63    public interface Thrower<T extends Throwable> {64        public void run() throws T;65    }66    public static <T extends Throwable> void assertThrows(Thrower<T> thrower, Class<T> throwable) {67        assertThrows(thrower, throwable, null);68    }69    public static <T extends Throwable> void assertThrows(Thrower<T> thrower, Class<T> throwable, String message) {70        Throwable result;71        try {72            thrower.run();73            fail(((null != message) ? message : "") + "Failed to throw " + throwable.getCanonicalName() + ". ");74            return;75        } catch (Throwable caught) {76            result = caught;77        }78        assertInstance(result, throwable, ((null != message) ? message : "") + "Failed to throw " + throwable.getCanonicalName() + ". ");79    }80    public static final boolean isDescending(SortedSet<?> set) {81        if (null == set.comparator()) {82            // natural order83            return false;84        }85        if (Collections.reverseOrder() == set.comparator()) {86            // reverse natural order.87            return true;88        }89        if (set.comparator().equals(Collections.reverseOrder(Collections.reverseOrder(set.comparator())))) {90            // it's a Collections.reverseOrder(Comparator).91            return true;92        }93        throw new IllegalStateException("can't determine ordering for " + set);94    }95    /**96     * Tests that the comparator is {@code null}.97     */98    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)99    public void testComparatorIsNull(String description, NavigableSet<?> navigableSet) {100        Comparator comparator = navigableSet.comparator();101        assertTrue(comparator == null || comparator == Collections.reverseOrder(), description + ": Comparator (" + comparator + ") is not null.");102    }103    /**104     * Tests that contains requires Comparable105     */106    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)107    public void testContainsRequiresComparable(String description, NavigableSet<?> navigableSet) {108        assertThrows(() -> {109            navigableSet.contains(new Object());110        },111            ClassCastException.class,112            description + ": Compareable should be required");113    }114    /**115     * Tests that the contains method returns {@code false}.116     */117    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)118    public void testContains(String description, NavigableSet<?> navigableSet) {119        assertFalse(navigableSet.contains(new Integer(1)),120            description + ": Should not contain any elements.");121    }122    /**123     * Tests that the containsAll method returns {@code false}.124     */125    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)126    public void testContainsAll(String description, NavigableSet<?> navigableSet) {127        TreeSet treeSet = new TreeSet();128        treeSet.add("1");129        treeSet.add("2");130        treeSet.add("3");131        assertFalse(navigableSet.containsAll(treeSet), "Should not contain any elements.");132    }133    /**134     * Tests that the iterator is empty.135     */136    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)137    public void testEmptyIterator(String description, NavigableSet<?> navigableSet) {138        Iterator emptyIterator = navigableSet.iterator();139        assertFalse((emptyIterator != null) && (emptyIterator.hasNext()),140            "The iterator is not empty.");141    }142    /**143     * Tests that the set is empty.144     */145    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)146    public void testIsEmpty(String description, NavigableSet<?> navigableSet) {147        assertTrue(navigableSet.isEmpty(), "The set is not empty.");148    }149    /**150     * Tests that the first() method throws NoSuchElementException151     */152    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)153    public void testFirst(String description, NavigableSet<?> navigableSet) {154        assertThrows(() -> {155            navigableSet.first();156        }, NoSuchElementException.class, description);157    }158    /**159     * Tests the headSet() method.160     */161    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)162    public void testHeadSet(String description, NavigableSet navigableSet) {163        assertThrows(164            () -> { NavigableSet ns = navigableSet.headSet(null, false); },165            NullPointerException.class,166            description + ": Must throw NullPointerException for null element");167        assertThrows(168            () -> { NavigableSet ns = navigableSet.headSet(new Object(), true); },169            ClassCastException.class,170            description + ": Must throw ClassCastException for non-Comparable element");171        NavigableSet ns = navigableSet.headSet("1", false);172        assertEmptyNavigableSet(ns, description + ": Returned value is not empty navigable set.");173    }174    /**175     * Tests that the last() method throws NoSuchElementException176     */177    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)178    public void testLast(String description, NavigableSet<?> navigableSet) {179        assertThrows(() -> {180            navigableSet.last();181        }, NoSuchElementException.class, description);182    }183    /**184     * Tests that the size is 0.185     */186    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)187    public void testSizeIsZero(String description, NavigableSet<?> navigableSet) {188        assertTrue(0 == navigableSet.size(), "The size of the set is not 0.");189    }190    /**191     * Tests the subSet() method.192     */193    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)194    public void testSubSet(String description, NavigableSet navigableSet) {195        assertThrows(196            () -> {197                SortedSet ss = navigableSet.subSet(null, BigInteger.TEN);198            },199            NullPointerException.class,200            description + ": Must throw NullPointerException for null element");201        assertThrows(202            () -> {203                SortedSet ss = navigableSet.subSet(BigInteger.ZERO, null);204            },205            NullPointerException.class,206            description + ": Must throw NullPointerException for null element");207        assertThrows(208            () -> {209                SortedSet ss = navigableSet.subSet(null, null);210            },211            NullPointerException.class,212            description + ": Must throw NullPointerException for null element");213        Object obj1 = new Object();214        Object obj2 = new Object();215        assertThrows(216            () -> {217                SortedSet ss = navigableSet.subSet(obj1, BigInteger.TEN);218            },219            ClassCastException.class, description220            + ": Must throw ClassCastException for parameter which is not Comparable.");221        assertThrows(222            () -> {223                SortedSet ss = navigableSet.subSet(BigInteger.ZERO, obj2);224            },225            ClassCastException.class, description226            + ": Must throw ClassCastException for parameter which is not Comparable.");227        assertThrows(228            () -> {229                SortedSet ss = navigableSet.subSet(obj1, obj2);230            },231            ClassCastException.class, description232            + ": Must throw ClassCastException for parameter which is not Comparable.");233        // minimal range234        navigableSet.subSet(BigInteger.ZERO, false, BigInteger.ZERO, false);235        navigableSet.subSet(BigInteger.ZERO, false, BigInteger.ZERO, true);236        navigableSet.subSet(BigInteger.ZERO, true, BigInteger.ZERO, false);237        navigableSet.subSet(BigInteger.ZERO, true, BigInteger.ZERO, true);238        Object first = isDescending(navigableSet) ? BigInteger.TEN : BigInteger.ZERO;239        Object last = (BigInteger.ZERO == first) ? BigInteger.TEN : BigInteger.ZERO;240            assertThrows(241                () -> {242                    navigableSet.subSet(last, true, first, false);243                },244                IllegalArgumentException.class, description245                + ": Must throw IllegalArgumentException when fromElement is not less then then toElement.");246        navigableSet.subSet(first, true, last, false);247    }248    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)249    public void testSubSetRanges(String description, NavigableSet navigableSet) {250        Object first = isDescending(navigableSet) ? BigInteger.TEN : BigInteger.ZERO;251        Object last = (BigInteger.ZERO == first) ? BigInteger.TEN : BigInteger.ZERO;252        NavigableSet subSet = navigableSet.subSet(first, true, last, true);253        // same subset254        subSet.subSet(first, true, last, true);255        // slightly smaller256        NavigableSet ns = subSet.subSet(first, false, last, false);257        // slight exapansion258        assertThrows(() -> {259            ns.subSet(first, true, last, true);260        },261            IllegalArgumentException.class,262            description + ": Expansion should not be allowed");263        // much smaller264        subSet.subSet(first, false, BigInteger.ONE, false);265    }266    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)267    public void testheadSetRanges(String description, NavigableSet navigableSet) {268        NavigableSet subSet = navigableSet.headSet(BigInteger.ONE, true);269        // same subset270        subSet.headSet(BigInteger.ONE, true);271        // slightly smaller272        NavigableSet ns = subSet.headSet(BigInteger.ONE, false);273        // slight exapansion274        assertThrows(() -> {275            ns.headSet(BigInteger.ONE, true);276        },277            IllegalArgumentException.class,278            description + ": Expansion should not be allowed");279        // much smaller280        subSet.headSet(isDescending(subSet) ? BigInteger.TEN : BigInteger.ZERO, true);281    }282    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)283    public void testTailSetRanges(String description, NavigableSet navigableSet) {284        NavigableSet subSet = navigableSet.tailSet(BigInteger.ONE, true);285        // same subset286        subSet.tailSet(BigInteger.ONE, true);287        // slightly smaller288        NavigableSet ns = subSet.tailSet(BigInteger.ONE, false);289        // slight exapansion290        assertThrows(() -> {291            ns.tailSet(BigInteger.ONE, true);292        },293            IllegalArgumentException.class,294            description + ": Expansion should not be allowed");295        // much smaller296        subSet.tailSet(isDescending(subSet) ? BigInteger.ZERO : BigInteger.TEN, false);297    }298    /**299     * Tests the tailSet() method.300     */301    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)302    public void testTailSet(String description, NavigableSet navigableSet) {303        assertThrows(() -> {304            navigableSet.tailSet(null);305        },306            NullPointerException.class,307            description + ": Must throw NullPointerException for null element");308        assertThrows(() -> {309            navigableSet.tailSet(new Object());310        }, ClassCastException.class);311        NavigableSet ss = navigableSet.tailSet("1", true);312        assertEmptyNavigableSet(ss, description + ": Returned value is not empty navigable set.");313    }314    /**315     * Tests that the array has a size of 0.316     */317    @Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class)318    public void testToArray(String description, NavigableSet<?> navigableSet) {319        Object[] emptyNavigableSetArray = navigableSet.toArray();320        assertTrue(emptyNavigableSetArray.length == 0, "Returned non-empty Array.");321        emptyNavigableSetArray = new Object[20];322        Object[] result = navigableSet.toArray(emptyNavigableSetArray);...

Source:EmptyNavigableMap.java

...62    }63    public interface Thrower<T extends Throwable> {64        public void run() throws T;65    }66    public static <T extends Throwable> void assertThrows(Thrower<T> thrower, Class<T> throwable) {67        assertThrows(thrower, throwable, null);68    }69    public static <T extends Throwable> void assertThrows(Thrower<T> thrower, Class<T> throwable, String message) {70        Throwable result;71        try {72            thrower.run();73            fail(((null != message) ? message : "") + "Failed to throw " + throwable.getCanonicalName() + ". ");74            return;75        } catch (Throwable caught) {76            result = caught;77        }78        assertInstance(result, throwable, ((null != message) ? message : "") + "Failed to throw " + throwable.getCanonicalName() + ". ");79    }80    public static final boolean isDescending(SortedMap<?,?> set) {81        if (null == set.comparator()) {82            // natural order83            return false;84        }85        if (Collections.reverseOrder() == set.comparator()) {86            // reverse natural order.87            return true;88        }89        if (set.comparator().equals(Collections.reverseOrder(Collections.reverseOrder(set.comparator())))) {90            // it's a Collections.reverseOrder(Comparator).91            return true;92        }93        throw new IllegalStateException("can't determine ordering for " + set);94    }95    /**96     * Tests that the comparator is {@code null}.97     */98    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)99    public void testComparatorIsNull(String description, NavigableMap<?,?> navigableMap) {100        Comparator comparator = navigableMap.comparator();101        assertTrue(comparator == null || comparator == Collections.reverseOrder(), description + ": Comparator (" + comparator + ") is not null.");102    }103    /**104     * Tests that contains requires Comparable105     */106    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)107    public void testContainsRequiresComparable(String description, NavigableMap<?,?> navigableMap) {108        assertThrows(() -> {109            navigableMap.containsKey(new Object());110        },111            ClassCastException.class,112            description + ": Compareable should be required");113    }114    /**115     * Tests that the contains method returns {@code false}.116     */117    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)118    public void testContains(String description, NavigableMap<?,?> navigableMap) {119        assertFalse(navigableMap.containsKey(new Integer(1)),120            description + ": Should not contain any elements.");121        assertFalse(navigableMap.containsValue(new Integer(1)),122            description + ": Should not contain any elements.");123    }124    /**125     * Tests that the containsAll method returns {@code false}.126     */127    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)128    public void testContainsAll(String description, NavigableMap<?,?> navigableMap) {129        TreeMap treeMap = new TreeMap();130        treeMap.put("1", 1);131        treeMap.put("2", 2);132        treeMap.put("3", 3);133        assertFalse(navigableMap.equals(treeMap), "Should not contain any elements.");134    }135    /**136     * Tests that the iterator is empty.137     */138    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)139    public void testEmptyIterator(String description, NavigableMap<?,?> navigableMap) {140        assertFalse(navigableMap.keySet().iterator().hasNext(), "The iterator is not empty.");141        assertFalse(navigableMap.values().iterator().hasNext(), "The iterator is not empty.");142        assertFalse(navigableMap.entrySet().iterator().hasNext(), "The iterator is not empty.");143    }144    /**145     * Tests that the set is empty.146     */147    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)148    public void testIsEmpty(String description, NavigableMap<?,?> navigableMap) {149        assertTrue(navigableMap.isEmpty(), "The set is not empty.");150    }151    /**152     * Tests the headMap() method.153     */154    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)155    public void testHeadMap(String description, NavigableMap navigableMap) {156        assertThrows(157            () -> { NavigableMap ss = navigableMap.headMap(null, false); },158            NullPointerException.class,159            description + ": Must throw NullPointerException for null element");160        assertThrows(161            () -> { NavigableMap ss = navigableMap.headMap(new Object(), true); },162            ClassCastException.class,163            description + ": Must throw ClassCastException for non-Comparable element");164        NavigableMap ss = navigableMap.headMap("1", false);165        assertEmptyNavigableMap(ss, description + ": Returned value is not empty navigable set.");166    }167    /**168     * Tests that the size is 0.169     */170    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)171    public void testSizeIsZero(String description, NavigableMap<?,?> navigableMap) {172        assertTrue(0 == navigableMap.size(), "The size of the set is not 0.");173    }174    /**175     * Tests the subMap() method.176     */177    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)178    public void testSubMap(String description, NavigableMap navigableMap) {179        assertThrows(180            () -> {181                SortedMap ss = navigableMap.subMap(null, BigInteger.TEN);182            },183            NullPointerException.class,184            description + ": Must throw NullPointerException for null element");185        assertThrows(186            () -> {187                SortedMap ss = navigableMap.subMap(BigInteger.ZERO, null);188            },189            NullPointerException.class,190            description + ": Must throw NullPointerException for null element");191        assertThrows(192            () -> {193                SortedMap ss = navigableMap.subMap(null, null);194            },195            NullPointerException.class,196            description + ": Must throw NullPointerException for null element");197        Object obj1 = new Object();198        Object obj2 = new Object();199        assertThrows(200            () -> {201                SortedMap ss = navigableMap.subMap(obj1, BigInteger.TEN);202            },203            ClassCastException.class, description204            + ": Must throw ClassCastException for parameter which is not Comparable.");205        assertThrows(206            () -> {207                SortedMap ss = navigableMap.subMap(BigInteger.ZERO, obj2);208            },209            ClassCastException.class, description210            + ": Must throw ClassCastException for parameter which is not Comparable.");211        assertThrows(212            () -> {213                SortedMap ss = navigableMap.subMap(obj1, obj2);214            },215            ClassCastException.class, description216            + ": Must throw ClassCastException for parameter which is not Comparable.");217        // minimal range218        navigableMap.subMap(BigInteger.ZERO, false, BigInteger.ZERO, false);219        navigableMap.subMap(BigInteger.ZERO, false, BigInteger.ZERO, true);220        navigableMap.subMap(BigInteger.ZERO, true, BigInteger.ZERO, false);221        navigableMap.subMap(BigInteger.ZERO, true, BigInteger.ZERO, true);222        Object first = isDescending(navigableMap) ? BigInteger.TEN : BigInteger.ZERO;223        Object last = (BigInteger.ZERO == first) ? BigInteger.TEN : BigInteger.ZERO;224            assertThrows(225                () -> {226                    navigableMap.subMap(last, true, first, false);227                },228                IllegalArgumentException.class, description229                + ": Must throw IllegalArgumentException when fromElement is not less then then toElement.");230        navigableMap.subMap(first, true, last, false);231    }232    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)233    public void testSubMapRanges(String description, NavigableMap navigableMap) {234        Object first = isDescending(navigableMap) ? BigInteger.TEN : BigInteger.ZERO;235        Object last = (BigInteger.ZERO == first) ? BigInteger.TEN : BigInteger.ZERO;236        NavigableMap subMap = navigableMap.subMap(first, true, last, true);237        // same subset238        subMap.subMap(first, true, last, true);239        // slightly smaller240        NavigableMap ns = subMap.subMap(first, false, last, false);241        // slight exapansion242        assertThrows(() -> {243            ns.subMap(first, true, last, true);244        },245            IllegalArgumentException.class,246            description + ": Expansion should not be allowed");247        // much smaller248        subMap.subMap(first, false, BigInteger.ONE, false);249    }250    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)251    public void testheadMapRanges(String description, NavigableMap navigableMap) {252        NavigableMap subMap = navigableMap.headMap(BigInteger.ONE, true);253        // same subset254        subMap.headMap(BigInteger.ONE, true);255        // slightly smaller256        NavigableMap ns = subMap.headMap(BigInteger.ONE, false);257        // slight exapansion258        assertThrows(() -> {259            ns.headMap(BigInteger.ONE, true);260        },261            IllegalArgumentException.class,262            description + ": Expansion should not be allowed");263        // much smaller264        subMap.headMap(isDescending(subMap) ? BigInteger.TEN : BigInteger.ZERO, true);265    }266    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)267    public void testTailMapRanges(String description, NavigableMap navigableMap) {268        NavigableMap subMap = navigableMap.tailMap(BigInteger.ONE, true);269        // same subset270        subMap.tailMap(BigInteger.ONE, true);271        // slightly smaller272        NavigableMap ns = subMap.tailMap(BigInteger.ONE, false);273        // slight exapansion274        assertThrows(() -> {275            ns.tailMap(BigInteger.ONE, true);276        },277            IllegalArgumentException.class,278            description + ": Expansion should not be allowed");279        // much smaller280        subMap.tailMap(isDescending(subMap) ? BigInteger.ZERO : BigInteger.TEN, false);281    }282    /**283     * Tests the tailMap() method.284     */285    @Test(dataProvider = "NavigableMap<?,?>", dataProviderClass = EmptyNavigableMap.class)286    public void testTailMap(String description, NavigableMap navigableMap) {287        assertThrows(() -> {288            navigableMap.tailMap(null);289        },290            NullPointerException.class,291            description + ": Must throw NullPointerException for null element");292        assertThrows(() -> {293            navigableMap.tailMap(new Object());294        }, ClassCastException.class);295        NavigableMap ss = navigableMap.tailMap("1", true);296        assertEmptyNavigableMap(ss, description + ": Returned value is not empty navigable set.");297    }298    @DataProvider(name = "NavigableMap<?,?>", parallel = true)299    public static Iterator<Object[]> navigableMapsProvider() {300        return makeNavigableMaps().iterator();301    }302    public static Collection<Object[]> makeNavigableMaps() {303        return Arrays.asList(304            new Object[]{"UnmodifiableNavigableMap(TreeMap)", Collections.unmodifiableNavigableMap(new TreeMap())},305            new Object[]{"UnmodifiableNavigableMap(TreeMap.descendingMap()", Collections.unmodifiableNavigableMap(new TreeMap().descendingMap())},306            new Object[]{"UnmodifiableNavigableMap(TreeMap.descendingMap().descendingMap()", Collections.unmodifiableNavigableMap(new TreeMap().descendingMap().descendingMap())},...

Source:TestKitTest.java

...45        Integer integer = TestKit.assertNotThrows(46                () -> TestKit.assertNotThrows(() -> 1)47        );48        assertEquals(integer, Integer.valueOf(1));49        RuntimeException re = TestKit.assertThrows(50                RuntimeException.class,51                () -> TestKit.assertNotThrows(() -> { throw new IOException(); })52        );53        assertEquals(re.getMessage(),54                "Expected to run normally, but threw "55                        + "java.io.IOException");56        TestKit.assertNotThrows(57                () -> TestKit.assertNotThrows(() -> { })58        );59        re = TestKit.assertThrows(60                RuntimeException.class,61                () ->  TestKit.assertNotThrows((TestKit.ThrowingProcedure) () -> { throw new IOException(); })62        );63        assertEquals(re.getMessage(),64                "Expected to run normally, but threw "65                        + "java.io.IOException");66    }67    @Test68    public void testAssertThrows() {69        NullPointerException npe = TestKit.assertThrows(70                NullPointerException.class,71                () -> TestKit.assertThrows(null, null)72        );73        assertNotNull(npe);74        assertTrue(Set.of("clazz", "code").contains(npe.getMessage()), npe.getMessage());75        npe = TestKit.assertThrows(76                NullPointerException.class,77                () -> TestKit.assertThrows(IOException.class, null)78        );79        assertNotNull(npe);80        assertEquals(npe.getMessage(), "code");81        npe = TestKit.assertThrows(82                NullPointerException.class,83                () -> TestKit.assertThrows(null, () -> { })84        );85        assertEquals(npe.getMessage(), "clazz");86        npe = TestKit.assertThrows(87                NullPointerException.class,88                () -> { throw new NullPointerException(); }89        );90        assertNotNull(npe);91        assertNull(npe.getMessage());92        assertEquals(npe.getClass(), NullPointerException.class);93        RuntimeException re = TestKit.assertThrows(94                RuntimeException.class,95                () -> TestKit.assertThrows(NullPointerException.class, () -> { })96        );97        assertEquals(re.getClass(), RuntimeException.class);98        assertEquals(re.getMessage(),99                "Expected to catch an exception of type "100                        + "java.lang.NullPointerException, but caught nothing");101        re = TestKit.assertThrows(102                RuntimeException.class,103                () -> { throw new NullPointerException(); }104        );105        assertNotNull(re);106        assertNull(re.getMessage());107        assertEquals(re.getClass(), NullPointerException.class);108        re = TestKit.assertThrows(109                RuntimeException.class,110                () -> TestKit.assertThrows(111                        IllegalFormatException.class,112                        () -> { throw new IndexOutOfBoundsException(); }113                ));114        assertNotNull(re);115        assertEquals(re.getClass(), RuntimeException.class);116        assertEquals(re.getMessage(),117                "Expected to catch an exception of type java.util.IllegalFormatException"118                        + ", but caught java.lang.IndexOutOfBoundsException");119    }120    @Test121    public void testAssertUnmodifiable() {122        TestKit.assertUnmodifiableList(123                Collections.unmodifiableList(124                        new ArrayList<>(Arrays.asList(1, 2, 3))));125        TestKit.assertThrows(RuntimeException.class,126                () -> TestKit.assertUnmodifiableList(new ArrayList<>()));127        TestKit.assertThrows(RuntimeException.class,128                () -> TestKit.assertUnmodifiableList(new LinkedList<>()));129        TestKit.assertThrows(RuntimeException.class,130                () -> TestKit.assertUnmodifiableList(131                        new ArrayList<>(Arrays.asList(1, 2, 3))));132        TestKit.assertUnmodifiableMap(Collections.unmodifiableMap(Map.of()));133        TestKit.assertThrows(RuntimeException.class,134                () -> TestKit.assertUnmodifiableMap(new HashMap<>()));135    }136}...

Source:SendTest.java

...34import static java.net.http.HttpClient.Builder.NO_PROXY;35import static java.net.http.HttpClient.newBuilder;36import static java.net.http.WebSocket.NORMAL_CLOSURE;37import static org.testng.Assert.assertEquals;38import static org.testng.Assert.assertThrows;39import static org.testng.Assert.assertTrue;40public class SendTest {41    private static final Class<NullPointerException> NPE = NullPointerException.class;42    private DummyWebSocketServer server;43    private WebSocket webSocket;44    @AfterTest45    public void cleanup() {46        server.close();47        webSocket.abort();48    }49    @Test50    public void sendMethodsThrowNPE() throws IOException {51        server = new DummyWebSocketServer();52        server.open();53        webSocket = newBuilder().proxy(NO_PROXY).build().newWebSocketBuilder()54                .buildAsync(server.getURI(), new WebSocket.Listener() { })55                .join();56        assertThrows(NPE, () -> webSocket.sendText(null, false));57        assertThrows(NPE, () -> webSocket.sendText(null, true));58        assertThrows(NPE, () -> webSocket.sendBinary(null, false));59        assertThrows(NPE, () -> webSocket.sendBinary(null, true));60        assertThrows(NPE, () -> webSocket.sendPing(null));61        assertThrows(NPE, () -> webSocket.sendPong(null));62        assertThrows(NPE, () -> webSocket.sendClose(NORMAL_CLOSURE, null));63        webSocket.abort();64        assertThrows(NPE, () -> webSocket.sendText(null, false));65        assertThrows(NPE, () -> webSocket.sendText(null, true));66        assertThrows(NPE, () -> webSocket.sendBinary(null, false));67        assertThrows(NPE, () -> webSocket.sendBinary(null, true));68        assertThrows(NPE, () -> webSocket.sendPing(null));69        assertThrows(NPE, () -> webSocket.sendPong(null));70        assertThrows(NPE, () -> webSocket.sendClose(NORMAL_CLOSURE, null));71    }72    // TODO: request in onClose/onError73    // TODO: throw exception in onClose/onError74    // TODO: exception is thrown from request()75    @Test76    public void sendCloseCompleted() throws IOException {77        server = new DummyWebSocketServer();78        server.open();79        webSocket = newBuilder().proxy(NO_PROXY).build().newWebSocketBuilder()80                .buildAsync(server.getURI(), new WebSocket.Listener() { })81                .join();82        webSocket.sendClose(NORMAL_CLOSURE, "").join();83        assertTrue(webSocket.isOutputClosed());84        assertEquals(webSocket.getSubprotocol(), "");...

Source:Class4_4Test.java

...5public class Class4_4Test {6    @Test7    public void getIntOfString() {8        System.out.println(Class4_4.getIntOfString("10", "5"));9        Assert.assertThrows(ArithmeticException.class,10                () -> Class4_4.getIntOfString("10", "0"));11        Assert.assertThrows(NumberFormatException.class,12                () -> Class4_4.getIntOfString("r", "1"));13        Assert.assertThrows(NumberFormatException.class,14                () -> Class4_4.getIntOfString("r", "a"));15    }16}...

assertThrows

Using AI Code Generation

1import org.testng.Assert;2import org.testng.annotations.Test;3public class TestNGAssertThrows {4    public void testAssertThrows() {5        Assert.assertThrows(IllegalArgumentException.class, () -> {6            throw new IllegalArgumentException("Expected exception");7        });8    }9}10Method testAssertThrows() should have thrown an exception of type class java.lang.IllegalArgumentException11at org.testng.Assert.assertThrows(Assert.java:1062)12at org.testng.Assert.assertThrows(Assert.java:1039)13at com.baeldung.testng.AssertThrowsTest.testAssertThrows(AssertThrowsTest.java:10)14at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)15at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)16at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)17at java.lang.reflect.Method.invoke(Method.java:498)18at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)19at org.testng.internal.Invoker.invokeMethod(Invoker.java:599)20at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:174)21at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:146)22at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)23at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)24at org.testng.TestRunner.privateRun(TestRunner.java:764)25at org.testng.TestRunner.run(TestRunner.java:585)26at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)27at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)28at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)29at org.testng.SuiteRunner.run(SuiteRunner.java:286)30at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)31at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)32at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)33at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)34at org.testng.TestNG.run(TestNG.java:1049)35at org.testng.TestNG.privateMain(TestNG.java:1354)36at org.testng.TestNG.main(TestNG.java:1323)37Assert.assertThrows()

assertThrows

Using AI Code Generation

1import org.testng.Assert;2import org.testng.annotations.Test;3import org.testng.asserts.SoftAssert;4public class TestNGSoftAssert {5    public void testSoftAssert() {6        SoftAssert softAssert = new SoftAssert();7        softAssert.assertEquals(1, 2, "1 is not equal to 2");8        softAssert.assertTrue(false, "This is false");9        softAssert.assertAll();10    }11    public void testSoftAssertWithAssertThrows() {12        SoftAssert softAssert = new SoftAssert();13        softAssert.assertThrows(AssertionError.class, () -> {14            Assert.assertEquals(1, 2, "1 is not equal to 2");15        });16        softAssert.assertThrows(AssertionError.class, () -> {17            Assert.assertTrue(false, "This is false");18        });19        softAssert.assertAll();20    }21}22	at org.testng.Assert.fail(Assert.java:94)23	at org.testng.Assert.failNotEquals(Assert.java:494)24	at org.testng.Assert.assertEquals(Assert.java:123)25	at org.testng.Assert.assertEquals(Assert.java:370)26	at org.testng.Assert.assertEquals(Assert.java:380)27	at TestNGSoftAssert.testSoftAssert(TestNGSoftAssert.java:14)28	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)29	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)30	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)31	at java.lang.reflect.Method.invoke(Method.java:498)32	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)33	at org.testng.internal.Invoker.invokeMethod(Invoker.java:580)34	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:716)35	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:988)36	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)37	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)38	at org.testng.TestRunner.privateRun(TestRunner.java:648)39	at org.testng.TestRunner.run(TestRunner.java:505)40	at org.testng.SuiteRunner.runTest(S

assertThrows

Using AI Code Generation

1public void testAssertThrows() {2    assertThrows(IllegalArgumentException.class, () -> {3        throw new IllegalArgumentException("Not a valid argument");4    });5}6public void testAssertThrows() {7    assertThrows(IllegalArgumentException.class, () -> {8        throw new IllegalArgumentException("Not a valid argument");9    }, "Message to print if the assertion fails");10}11public void testAssertThrows() {12    assertThrows(IllegalArgumentException.class, () -> {13        throw new IllegalArgumentException("Not a valid argument");14    }, "Message to print if the assertion fails", "Expected value");15}16public void testAssertThrows() {17    assertThrows(IllegalArgumentException.class, () -> {18        throw new IllegalArgumentException("Not a valid argument");19    }, "Message to print if the assertion fails", "Expected value", "Actual value");20}21public void testAssertThrows() {22    assertThrows(IllegalArgumentException.class, () -> {23        throw new IllegalArgumentException("Not a valid argument");24    }, "Message to print if the assertion fails", "Expected value", "Actual value", "Delta value");25}26public void testAssertThrows() {27    assertThrows(IllegalArgumentException.class, () -> {28        throw new IllegalArgumentException("Not a valid argument");29    }, "Message to print if the assertion fails", "Expected value", "Actual value", "Delta value", "Expected object");30}31public void testAssertThrows() {32    assertThrows(IllegalArgumentException.class, () -> {33        throw new IllegalArgumentException("Not a valid argument");34    }, "Message to print if the assertion fails", "Expected value", "Actual value", "Delta value", "Expected object", "Actual object");35}36public void testAssertThrows() {37    assertThrows(IllegalArgumentException.class, () -> {38        throw new IllegalArgumentException("Not a valid argument");39    }, "Message to print if the assertion fails", "Expected value", "Actual value", "Delta value", "Expected object", "Actual object", "Expected array", "Actual array");40}

assertThrows

Using AI Code Generation

1import org.testng.Assert;2import org.testng.annotations.Test;3public class TestNG_AssertThrows {4    public void testAssertThrows() {5        Assert.assertThrows(IllegalArgumentException.class, () -> {6            throw new IllegalArgumentException("IllegalArgumentException");7        });8    }9}10Method testAssertThrows() of class TestNG_AssertThrows threw an exception: java.lang.IllegalArgumentException: IllegalArgumentException11    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:86)12    at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)13    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)14    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)15    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)16    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)17    at org.testng.TestRunner.privateRun(TestRunner.java:767)18    at org.testng.TestRunner.run(TestRunner.java:617)19    at org.testng.SuiteRunner.runTest(SuiteRunner.java:348)20    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:343)21    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:305)22    at org.testng.SuiteRunner.run(SuiteRunner.java:254)23    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)24    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)25    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185)26    at org.testng.TestNG.runSuitesLocally(TestNG.java:1110)27    at org.testng.TestNG.runSuites(TestNG.java:1029)28    at org.testng.TestNG.run(TestNG.java:996)29    at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:73)30    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:123)31    at TestNG_AssertThrows.testAssertThrows(TestNG_AssertThrows.java:15)32    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)33    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

assertThrows

Using AI Code Generation

1public void test() throws Exception {2    assertThrows(NullPointerException.class, () -> {3        throw new NullPointerException();4    });5}6public void test() throws Exception {7    assertThrows(NullPointerException.class, () -> {8        throw new NullPointerException();9    });10}11public void test() throws Exception {12    assertThrows(NullPointerException.class, () -> {13        throw new NullPointerException();14    });15}16public void test() throws Exception {17    assertThrows(NullPointerException.class, () -> {18        throw new NullPointerException();19    });20}21public void test() throws Exception {22    assertThrows(NullPointerException.class, () -> {23        throw new NullPointerException();24    });25}26public void test() throws Exception {27    assertThrows(NullPointerException.class, () -> {28        throw new NullPointerException();29    });30}31public void test() throws Exception {32    assertThrows(NullPointerException.class, () -> {33        throw new NullPointerException();34    });35}36public void test() throws Exception {37    assertThrows(NullPointerException.class, () -> {38        throw new NullPointerException();39    });40}41public void test() throws Exception {42    assertThrows(NullPointerException.class, () -> {43        throw new NullPointerException();44    });45}46public void test() throws Exception {47    assertThrows(NullPointerException.class, () -> {48        throw new NullPointerException();49    });50}

TestNG tutorial

TestNG is a Java-based open-source framework for test automation that includes various test types, such as unit testing, functional testing, E2E testing, etc. TestNG is in many ways similar to JUnit and NUnit. But in contrast to its competitors, its extensive features make it a lot more reliable framework. One of the major reasons for its popularity is its ability to structure tests and improve the scripts' readability and maintainability. Another reason can be the important characteristics like the convenience of using multiple annotations, reliance, and priority that make this framework popular among developers and testers for test design. You can refer to the TestNG tutorial to learn why you should choose the TestNG framework.

Chapters

JUnit 5 vs. TestNG: Compare and explore the core differences between JUnit 5 and TestNG from the Selenium WebDriver viewpoint.
Installing TestNG in Eclipse: Start installing the TestNG Plugin and learn how to set up TestNG in Eclipse to begin constructing a framework for your test project.
Create TestNG Project in Eclipse: Get started with creating a TestNG project and write your first TestNG test script.
Automation using TestNG: Dive into how to install TestNG in this Selenium TestNG tutorial, the fundamentals of developing an automation script for Selenium automation testing.
Parallel Test Execution in TestNG: Here are some essential elements of parallel testing with TestNG in this Selenium TestNG tutorial.
Creating TestNG XML File: Here is a step-by-step tutorial on creating a TestNG XML file to learn why and how it is created and discover how to run the TestNG XML file being executed in parallel.
Automation with Selenium, Cucumber & TestNG: Explore for an in-depth tutorial on automation using Selenium, Cucumber, and TestNG, as TestNG offers simpler settings and more features.
JUnit Selenium Tests using TestNG: Start running your regular and parallel tests by looking at how to run test cases in Selenium using JUnit and TestNG without having to rewrite the tests.
Group Test Cases in TestNG: Along with the explanation and demonstration using relevant TestNG group examples, learn how to group test cases in TestNG.
Prioritizing Tests in TestNG: Get started with how to prioritize test cases in TestNG for Selenium automation testing.
Assertions in TestNG: Examine what TestNG assertions are, the various types of TestNG assertions, and situations that relate to Selenium automated testing.
DataProviders in TestNG: Deep dive into learning more about TestNG's DataProvider and how to effectively use it in our test scripts for Selenium test automation.
Parameterization in TestNG: Here are the several parameterization strategies used in TestNG tests and how to apply them in Selenium automation scripts.
TestNG Listeners in Selenium WebDriver: Understand the various TestNG listeners to utilize them effectively for your next plan when working with TestNG and Selenium automation.
TestNG Annotations: Learn more about the execution order and annotation attributes, and refer to the prerequisites required to set up TestNG.
TestNG Reporter Log in Selenium: Find out how to use the TestNG Reporter Log and learn how to eliminate the need for external software with TestNG Reporter Class to boost productivity.
TestNG Reports in Jenkins: Discover how to generate TestNG reports in Jenkins if you want to know how to create, install, and share TestNG reports in Jenkins.

Certification

You can push your abilities to do automated testing using TestNG and advance your career by earning a TestNG certification. Check out our TestNG certification.