Skip to content

Add Boundary Test to MultiplicationWithoutMultiplyTest #54

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
nguyengiangk62uet wants to merge 1 commit into
base: master
Choose a base branch
from
+23 −0
Open

Add Boundary Test to MultiplicationWithoutMultiplyTest #54

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
23 changes: 23 additions & 0 deletions src/test/java/com/github/pedrovgs/problem20/MultiplicationWithoutMultiplyTest.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,9 @@
*/
public class MultiplicationWithoutMultiplyTest {

private final static int MAX_INT = Integer.MAX_VALUE;
private final static int MIN_INT = -MAX_INT;

private MultiplicationWithoutMultiply multiply;

@Before public void setUp() {
Expand All @@ -46,4 +49,24 @@ public class MultiplicationWithoutMultiplyTest {
@Test public void shouldTakeIntoAccountNegativeNumbers() {
assertEquals(-14, multiply.calculate(-2, 7));
}

@Test public void boundaryTest() {
assertEquals(0, multiply.calculate(0, MAX_INT));
assertEquals(0, multiply.calculate(0, MIN_INT));
assertEquals(MAX_INT, multiply.calculate(1, MAX_INT));
assertEquals(MIN_INT, multiply.calculate(1, MIN_INT));
assertEquals(1, multiply.calculate(MAX_INT, MAX_INT));
assertEquals(1, multiply.calculate(MIN_INT, MIN_INT));
}

@Test public void strongBoundaryTest() {
assertEquals(4, multiply.calculate(MAX_INT - 1, MAX_INT - 1));
assertEquals(0, multiply.calculate(MAX_INT + 1, MAX_INT + 1));
assertEquals(4, multiply.calculate(MIN_INT + 1, MIN_INT + 1));
assertEquals(0, multiply.calculate(MIN_INT - 1, MIN_INT - 1));
assertEquals(0, multiply.calculate(0, MAX_INT - 1));
assertEquals(0, multiply.calculate(0, MIN_INT - 1));
assertEquals(MAX_INT - 1, multiply.calculate(1, MAX_INT - 1));
assertEquals(MIN_INT - 1, multiply.calculate(1, MIN_INT - 1));
}
}