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BAEL-3778: Add tests to verify if 2 is prime number or not (#8520)

This commit is contained in:
kwoyke 2020-01-15 06:38:32 +01:00 committed by Grzegorz Piwowarek
parent 7a23abe4ff
commit c4c51d0383
3 changed files with 10 additions and 6 deletions
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2
java-numbers-2/src/main/java/com/baeldung/algorithms/primechecker/BruteForcePrimeChecker.java
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@ -7,7 +7,7 @@ public class BruteForcePrimeChecker implements PrimeChecker<Integer> {
@Override
public boolean isPrime(Integer number) {
return number > 2 ? IntStream.range(2, number)
return number > 1 ? IntStream.range(2, number)
.noneMatch(n -> (number % n == 0)) : false;
}

2
java-numbers-2/src/main/java/com/baeldung/algorithms/primechecker/OptimisedPrimeChecker.java
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@ -6,7 +6,7 @@ public class OptimisedPrimeChecker implements PrimeChecker<Integer> {
@Override
public boolean isPrime(Integer number) {
return number > 2 ? IntStream.rangeClosed(2, (int) Math.sqrt(number))
return number > 1 ? IntStream.rangeClosed(2, (int) Math.sqrt(number))
.noneMatch(n -> (number % n == 0)) : false;
}

12
java-numbers-2/src/test/java/com/baeldung/algorithms/primechecker/PrimeCheckerUnitTest.java
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@ -11,22 +11,24 @@ public class PrimeCheckerUnitTest {
@Test
public void whenCheckIsPrime_thenTrue() {
assertTrue(primeChecker.isPrime(13l));
assertTrue(primeChecker.isPrime(2L));
assertTrue(primeChecker.isPrime(13L));
assertTrue(primeChecker.isPrime(1009L));
assertTrue(primeChecker.isPrime(74207281L));
}
@Test
public void whenCheckIsPrime_thenFalse() {
assertTrue(!primeChecker.isPrime(50L));
assertTrue(!primeChecker.isPrime(1001L));
assertTrue(!primeChecker.isPrime(74207282L));
assertFalse(primeChecker.isPrime(50L));
assertFalse(primeChecker.isPrime(1001L));
assertFalse(primeChecker.isPrime(74207282L));
}
private final BruteForcePrimeChecker bfPrimeChecker = new BruteForcePrimeChecker();
@Test
public void whenBFCheckIsPrime_thenTrue() {
assertTrue(bfPrimeChecker.isPrime(2));
assertTrue(bfPrimeChecker.isPrime(13));
assertTrue(bfPrimeChecker.isPrime(1009));
}
@ -41,6 +43,7 @@ public class PrimeCheckerUnitTest {
@Test
public void whenOptCheckIsPrime_thenTrue() {
assertTrue(optimisedPrimeChecker.isPrime(2));
assertTrue(optimisedPrimeChecker.isPrime(13));
assertTrue(optimisedPrimeChecker.isPrime(1009));
}
@ -55,6 +58,7 @@ public class PrimeCheckerUnitTest {
@Test
public void whenPrimesCheckIsPrime_thenTrue() {
assertTrue(primesPrimeChecker.isPrime(2));
assertTrue(primesPrimeChecker.isPrime(13));
assertTrue(primesPrimeChecker.isPrime(1009));
}