@Test
public void shouldReturnNegativeIntForNullArray() {
String errorMsg = "response not a negative int";
int position = positionFinder.getPosition(null, 3);
assertTrue(errorMsg, position < 0);
}
private void assertMidPointIsAsExpected(int low, int high, int expectedMidPoint) {
String errorMsg = "midpoint not as expected";
int actualMidPoint;
actualMidPoint = positionFinder.getMidPoint(low, high);
assertEquals(errorMsg, expectedMidPoint, actualMidPoint);
}
@Test
public void shouldReturnNegativePositionIfValueDoesNotExistInArray() {
String errorMsg = "position is not less than 0";
int[] valueArray = {1, 2, 3, 4, 5};
int position = positionFinder.getPosition(valueArray, 9);
assertTrue(errorMsg, position < 0);
}
@Test
public void shouldReturnPositivePositionIfValueExistInArray() {
String errorMsg = "position is not greater than 0";
int[] valueArray = {1, 2, 3, 4, 5};
int position = positionFinder.getPosition(valueArray, 3);
assertTrue(errorMsg, position > 0);
}
@Test
public void shouldReturnHighGivenArray() {
String errorMsg = "midpoint not as expected";
int[] valueArray = {1, 2, 3, 4, 5};
int high = positionFinder.getHigh(valueArray);
assertEquals(errorMsg, 4, high);
}
private void assertPositionIsAsExpected(int[] valueArray, int value, int expectedPosition) {
String errorMsg = "position not as expected";
int actualPosition = positionFinder.getPosition(valueArray, value);
assertEquals(errorMsg, expectedPosition, actualPosition);
}