Verify assertValueAt with negative index

Author: akarnokd

src/test/java/io/reactivex/rxjava3/observers/TestObserverTest.java

@@ -962,6 +962,21 @@ public void assertValueAtInvalidIndex() {
  });
  }
 
+ @Test
+ public void assertValueAtInvalidIndexNegative() {
+ assertThrowsWithMessage("Index -2 is out of range [0, 2) (latch = 0, values = 2, errors = 0, completions = 1)", AssertionError.class, () -> {
+ TestObserver<Integer> to = new TestObserver<>();
+
+ Observable.just(1, 2).subscribe(to);
+
+ to.assertValueAt(-2, new Predicate<Integer>() {
+ @Override public boolean test(final Integer o) throws Exception {
+ return o == 1;
+ }
+ });
+ });
+ }
+
  @Test
  public void assertValueAtIndexEmpty() {
  assertThrowsWithMessage("No values (latch = 0, values = 0, errors = 0, completions = 1)", AssertionError.class, () -> {
@@ -1004,6 +1019,17 @@ public void assertValueAtIndexInvalidIndex() {
  });
  }
 
+ @Test
+ public void assertValueAtIndexInvalidIndexNegative() {
+ assertThrowsWithMessage("Index -2 is out of range [0, 2) (latch = 0, values = 2, errors = 0, completions = 1)", AssertionError.class, () -> {
+ TestObserver<String> to = new TestObserver<>();
+
+ Observable.just("a", "b").subscribe(to);
+
+ to.assertValueAt(-2, "c");
+ });
+ }
+
  @Test
  public void withTag() {
  try {

src/test/java/io/reactivex/rxjava3/subscribers/TestSubscriberTest.java

@@ -1484,6 +1484,43 @@ public void assertValueAtInvalidIndex() {
  });
  }
 
+ @Test
+ public void assertValueAtIndexInvalidIndex() {
+ assertThrowsWithMessage("Index 2 is out of range [0, 2) (latch = 0, values = 2, errors = 0, completions = 1)", AssertionError.class, () -> {
+ TestSubscriber<Integer> ts = new TestSubscriber<>();
+
+ Flowable.just(1, 2).subscribe(ts);
+
+ ts.assertValueAt(2, 3);
+ });
+ }
+
+ @Test
+ public void assertValueAtIndexInvalidIndexNegative() {
+ assertThrowsWithMessage("Index -2 is out of range [0, 2) (latch = 0, values = 2, errors = 0, completions = 1)", AssertionError.class, () -> {
+ TestSubscriber<Integer> ts = new TestSubscriber<>();
+
+ Flowable.just(1, 2).subscribe(ts);
+
+ ts.assertValueAt(-2, 3);
+ });
+ }
+
+ @Test
+ public void assertValueAtInvalidIndexNegative() {
+ assertThrowsWithMessage("Index -2 is out of range [0, 2) (latch = 0, values = 2, errors = 0, completions = 1)", AssertionError.class, () -> {
+ TestSubscriber<Integer> ts = new TestSubscriber<>();
+
+ Flowable.just(1, 2).subscribe(ts);
+
+ ts.assertValueAt(-2, new Predicate<Integer>() {
+ @Override public boolean test(final Integer o) throws Exception {
+ return o == 1;
+ }
+ });
+ });
+ }
+
  @Test
  public void requestMore() {
  Flowable.range(1, 5)