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LinkedQueueTest - add check for tail value - completed #146

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LinkedQueueTest - add check for tail value - completed #146

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17 changes: 14 additions & 3 deletions ...ures-and-algorithms/2-2-3-linked-queue/src/test/java/com/bobocode/cs/LinkedQueueTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,7 @@ void createNodeClass() {

@Test
@Order(2)
void chekFieldsNameInNodeClass() {
void checkFieldsNameInNodeClass() {
Class<?> innerClass = getInnerStaticNodeClass();
boolean hasElementField = hasField(innerClass, ELEMENT_FIELD);
boolean hasNodeField = hasField(innerClass, NODE_FIELD);
Expand Down Expand Up @@ -104,16 +104,19 @@ void addFillsQueueWhenItIsEmpty() {
@Order(5)
void addFillsQueueWhenItIsNotEmpty() {
addIntElementToQueue(12);
addIntElementToQueue(13);
integerQueue.add(111);
int size = getInternalSize();
boolean isEmpty = isEmptyQueue();
Integer firstElement = (Integer) pollElementFromQueue();
Integer secondElement = (Integer) pollElementFromQueue();
Integer tailValue = (Integer) getNodeValue(TAIL_FIELD);

assertThat(size).isEqualTo(2);
assertThat(size).isEqualTo(3);
assertThat(isEmpty).isEqualTo(false);
assertThat(firstElement).isEqualTo(12);
assertThat(secondElement).isEqualTo(111);
assertThat(secondElement).isEqualTo(13);
assertThat(tailValue).isEqualTo(111);
}

@Test
Expand Down Expand Up @@ -363,4 +366,12 @@ private Field getAccessibleFieldByPredicate(Object object, Predicate<Field> pred
field.setAccessible(true);
return field;
}

@SneakyThrows
private Object getNodeValue(Predicate<Field> predicate) {
Object field = getAccessibleFieldByPredicate(integerQueue, predicate).get(integerQueue);
final Field value = getAccessibleFieldByPredicate(field, ELEMENT_FIELD);
value.setAccessible(true);
return value.get(field);
}
}