Fix sonar issues
Remove public keyword from tests.
Swap expected and actual values.
Only one possible runtime exception in the assertThrows.
Use assertNotEquals.
diff --git a/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/BigFractionTest.java b/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/BigFractionTest.java
index f6c147f..594ace9 100644
--- a/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/BigFractionTest.java
+++ b/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/BigFractionTest.java
@@ -786,7 +786,9 @@
Assertions.assertThrows(ArithmeticException.class, () -> BigFraction.ZERO.pow(Integer.MIN_VALUE));
// shall overflow
- Assertions.assertThrows(ArithmeticException.class, () -> BigFraction.of(2).pow(Integer.MIN_VALUE));
- Assertions.assertThrows(ArithmeticException.class, () -> BigFraction.of(1, 2).pow(Integer.MIN_VALUE));
+ final BigFraction f2 = BigFraction.of(2);
+ Assertions.assertThrows(ArithmeticException.class, () -> f2.pow(Integer.MIN_VALUE));
+ final BigFraction f12 = BigFraction.of(1, 2);
+ Assertions.assertThrows(ArithmeticException.class, () -> f12.pow(Integer.MIN_VALUE));
}
}
diff --git a/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/CommonsLangPortedFractionTest.java b/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/CommonsLangPortedFractionTest.java
index 892a6ba..940a6a9 100644
--- a/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/CommonsLangPortedFractionTest.java
+++ b/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/CommonsLangPortedFractionTest.java
@@ -23,6 +23,9 @@
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
+import java.util.function.BiFunction;
+import java.util.function.UnaryOperator;
+
/**
* Test cases for the {@link Fraction} class.
*
@@ -35,7 +38,7 @@
//--------------------------------------------------------------------------
@Test
- public void testConstants() {
+ void testConstants() {
assertEquals(0, Fraction.ZERO.getNumerator());
assertEquals(1, Fraction.ZERO.getDenominator());
@@ -80,7 +83,7 @@
}
@Test
- public void testFactory_int_int() {
+ void testFactory_int_int() {
Fraction f = null;
// zero
@@ -147,7 +150,7 @@
* Removed as not supported in numbers.
*
* @Test
- * public void testFactory_int_int_int() {
+ * void testFactory_int_int_int() {
* Fraction f = null;
*
* // zero
@@ -202,7 +205,7 @@
*/
@Test
- public void testReducedFactory_int_int() {
+ void testReducedFactory_int_int() {
Fraction f = null;
// zero
@@ -284,7 +287,7 @@
}
@Test
- public void testFactory_double() {
+ void testFactory_double() {
assertThrows(IllegalArgumentException.class, () -> Fraction.from(Double.NaN));
assertThrows(IllegalArgumentException.class, () -> Fraction.from(Double.POSITIVE_INFINITY));
assertThrows(IllegalArgumentException.class, () -> Fraction.from(Double.NEGATIVE_INFINITY));
@@ -351,13 +354,13 @@
* Removed as not supported in numbers.
*
* @Test
- * public void testFactory_String() {
+ * void testFactory_String() {
* assertThrows(NullPointerException.class, () -> Fraction.from(null));
* }
*
*
* @Test
- * public void testFactory_String_double() {
+ * void testFactory_String_double() {
* Fraction f = null;
*
* f = Fraction.from("0.0");
@@ -382,7 +385,7 @@
* }
*
* @Test
- * public void testFactory_String_proper() {
+ * void testFactory_String_proper() {
* Fraction f = null;
*
* f = Fraction.from("0 0/1");
@@ -418,7 +421,7 @@
* }
*
* @Test
- * public void testFactory_String_improper() {
+ * void testFactory_String_improper() {
* Fraction f = null;
*
* f = Fraction.from("0/1");
@@ -452,7 +455,7 @@
* }
*
* @Test
- * public void testGets() {
+ * void testGets() {
* Fraction f = null;
*
* f = Fraction.of(3, 5, 6);
@@ -475,7 +478,7 @@
* }
*
* @Test
- * public void testConversions() {
+ * void testConversions() {
* Fraction f = null;
*
* f = Fraction.of(3, 7, 8);
@@ -486,7 +489,7 @@
* }
*
* @Test
- * public void testReduce() {
+ * void testReduce() {
* Fraction f = null;
*
* f = Fraction.of(50, 75);
@@ -535,7 +538,7 @@
* }
*
* @Test
- * public void testreciprocal() {
+ * void testreciprocal() {
* Fraction f = null;
*
* f = Fraction.of(50, 75);
@@ -564,7 +567,7 @@
*/
@Test
- public void testNegate() {
+ void testNegate() {
Fraction f = null;
f = Fraction.of(50, 75);
@@ -593,7 +596,7 @@
}
@Test
- public void testAbs() {
+ void testAbs() {
Fraction f = null;
f = Fraction.of(50, 75);
@@ -626,7 +629,7 @@
}
@Test
- public void testPow() {
+ void testPow() {
Fraction f = null;
f = Fraction.of(3, 5);
@@ -703,26 +706,26 @@
// one to any power is still one.
f = Fraction.of(1, 1);
f = f.pow(0);
- assertEquals(f, Fraction.ONE);
+ assertEquals(Fraction.ONE, f);
f = f.pow(1);
- assertEquals(f, Fraction.ONE);
+ assertEquals(Fraction.ONE, f);
f = f.pow(-1);
- assertEquals(f, Fraction.ONE);
+ assertEquals(Fraction.ONE, f);
f = f.pow(Integer.MAX_VALUE);
- assertEquals(f, Fraction.ONE);
+ assertEquals(Fraction.ONE, f);
f = f.pow(Integer.MIN_VALUE);
- assertEquals(f, Fraction.ONE);
+ assertEquals(Fraction.ONE, f);
- assertThrows(ArithmeticException.class, () -> Fraction.of(Integer.MAX_VALUE, 1).pow(2));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(Integer.MAX_VALUE, 1), a -> a.pow(2));
// Numerator growing too negative during the pow operation.
- assertThrows(ArithmeticException.class, () -> Fraction.of(Integer.MIN_VALUE, 1).pow(3));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(Integer.MIN_VALUE, 1), a -> a.pow(3));
- assertThrows(ArithmeticException.class, () -> Fraction.of(65536, 1).pow(2));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(65536, 1), a -> a.pow(2));
}
@Test
- public void testAdd() {
+ void testAdd() {
Fraction f = null;
Fraction f1 = null;
Fraction f2 = null;
@@ -808,7 +811,7 @@
assertThrows(ArithmeticException.class, () -> overflower.add(Fraction.ONE)); // should overflow
// denominator should not be a multiple of 2 or 3 to trigger overflow
- assertThrows(ArithmeticException.class, () -> Fraction.of(Integer.MIN_VALUE, 5).add(Fraction.of(-1, 5)));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(Integer.MIN_VALUE, 5), Fraction.of(-1, 5), Fraction::add);
final Fraction maxValue = Fraction.of(-Integer.MAX_VALUE, 1);
assertThrows(ArithmeticException.class, () -> maxValue.add(maxValue));
@@ -822,7 +825,7 @@
}
@Test
- public void testSubtract() {
+ void testSubtract() {
Fraction f = null;
Fraction f1 = null;
Fraction f2 = null;
@@ -898,22 +901,22 @@
assertEquals(1, f.getDenominator());
// Should overflow
- assertThrows(ArithmeticException.class, () -> Fraction.of(1, Integer.MAX_VALUE).subtract(Fraction.of(1, Integer.MAX_VALUE - 1)));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(1, Integer.MAX_VALUE), Fraction.of(1, Integer.MAX_VALUE - 1), Fraction::subtract);
f = f1.subtract(f2);
// denominator should not be a multiple of 2 or 3 to trigger overflow
- assertThrows(ArithmeticException.class, () -> Fraction.of(Integer.MIN_VALUE, 5).subtract(Fraction.of(1, 5)));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(Integer.MIN_VALUE, 5), Fraction.of(1, 5), Fraction::subtract);
- assertThrows(ArithmeticException.class, () -> Fraction.of(Integer.MIN_VALUE, 1).subtract(Fraction.ONE));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(Integer.MIN_VALUE, 1), Fraction.ONE, Fraction::subtract);
- assertThrows(ArithmeticException.class, () -> Fraction.of(Integer.MAX_VALUE, 1).subtract(Fraction.ONE.negate()));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(Integer.MAX_VALUE, 1), Fraction.ONE.negate(), Fraction::subtract);
// Should overflow
- assertThrows(ArithmeticException.class, () -> Fraction.of(3, 327680).subtract(Fraction.of(2, 59049)));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(3, 327680), Fraction.of(2, 59049), Fraction::subtract);
}
@Test
- public void testMultiply() {
+ void testMultiply() {
Fraction f = null;
Fraction f1 = null;
Fraction f2 = null;
@@ -974,7 +977,7 @@
}
@Test
- public void testDivide() {
+ void testDivide() {
Fraction f = null;
Fraction f1 = null;
Fraction f2 = null;
@@ -985,7 +988,7 @@
assertEquals(3, f.getNumerator());
assertEquals(2, f.getDenominator());
- assertThrows(ArithmeticException.class, () -> Fraction.of(3, 5).divide(Fraction.ZERO));
+ assertOperationThrows(ArithmeticException.class, Fraction.of(3, 5), Fraction.ZERO, Fraction::divide);
f1 = Fraction.of(0, 5);
f2 = Fraction.of(2, 7);
@@ -1012,14 +1015,16 @@
assertThrows(NullPointerException.class, () -> fr.divide(null));
final Fraction smallest = Fraction.of(1, Integer.MAX_VALUE);
- assertThrows(ArithmeticException.class, () -> smallest.divide(smallest.reciprocal())); // Should overflow
+ final Fraction smallestReciprocal = smallest.reciprocal();
+ assertThrows(ArithmeticException.class, () -> smallest.divide(smallestReciprocal)); // Should overflow
final Fraction negative = Fraction.of(1, -Integer.MAX_VALUE);
- assertThrows(ArithmeticException.class, () -> negative.divide(negative.reciprocal())); // Should overflow
+ final Fraction negativeReciprocal = negative.reciprocal();
+ assertThrows(ArithmeticException.class, () -> negative.divide(negativeReciprocal)); // Should overflow
}
@Test
- public void testEquals() {
+ void testEquals() {
Fraction f1 = null;
Fraction f2 = null;
@@ -1042,21 +1047,21 @@
}
@Test
- public void testHashCode() {
+ void testHashCode() {
final Fraction f1 = Fraction.of(3, 5);
Fraction f2 = Fraction.of(3, 5);
assertEquals(f1.hashCode(), f2.hashCode());
f2 = Fraction.of(2, 5);
- assertTrue(f1.hashCode() != f2.hashCode());
+ assertNotEquals(f1.hashCode(), f2.hashCode());
f2 = Fraction.of(6, 10);
assertEquals(f1.hashCode(), f2.hashCode());
}
@Test
- public void testCompareTo() {
+ void testCompareTo() {
Fraction f1 = null;
Fraction f2 = null;
@@ -1092,7 +1097,7 @@
}
@Test
- public void testToString() {
+ void testToString() {
Fraction f = null;
f = Fraction.of(3, 5);
@@ -1123,7 +1128,7 @@
* Removed as not supported in numbers.
*
* @Test
- * public void testToProperString() {
+ * void testToProperString() {
* Fraction f = null;
*
* f = Fraction.of(3, 5);
@@ -1158,4 +1163,37 @@
* assertEquals("-1", Fraction.of(-1).toProperString());
* }
*/
+
+ /**
+ * Assert the specified operation on the fraction throws the expected type.
+ * This method exists to ensure the fractions are constructed without an exception
+ * and the operation is tested to throw the exception.
+ *
+ * @param <T> the generic type
+ * @param expectedType the expected type
+ * @param f the fraction
+ * @param operation the operation
+ * @return the throwable
+ */
+ private static <T extends Throwable> T assertOperationThrows(Class<T> expectedType,
+ Fraction f, UnaryOperator<Fraction> operation) {
+ return assertThrows(expectedType, () -> operation.apply(f));
+ }
+
+ /**
+ * Assert the specified operation on two fractions throws the expected type.
+ * This method exists to ensure the fractions are constructed without an exception
+ * and the operation is tested to throw the exception.
+ *
+ * @param <T> the generic type
+ * @param expectedType the expected type
+ * @param f1 the first fraction
+ * @param f2 the second fraction
+ * @param operation the operation
+ * @return the throwable
+ */
+ private static <T extends Throwable> T assertOperationThrows(Class<T> expectedType,
+ Fraction f1, Fraction f2, BiFunction<Fraction, Fraction, Fraction> operation) {
+ return assertThrows(expectedType, () -> operation.apply(f1, f2));
+ }
}
diff --git a/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/FractionTest.java b/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/FractionTest.java
index 8b5506d..478c196 100644
--- a/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/FractionTest.java
+++ b/commons-numbers-fraction/src/test/java/org/apache/commons/numbers/fraction/FractionTest.java
@@ -629,8 +629,10 @@
Assertions.assertThrows(ArithmeticException.class, () -> Fraction.ZERO.pow(Integer.MIN_VALUE));
// shall overflow
- Assertions.assertThrows(ArithmeticException.class, () -> Fraction.of(2).pow(Integer.MIN_VALUE));
- Assertions.assertThrows(ArithmeticException.class, () -> Fraction.of(1, 2).pow(Integer.MIN_VALUE));
+ final Fraction f2 = Fraction.of(2);
+ Assertions.assertThrows(ArithmeticException.class, () -> f2.pow(Integer.MIN_VALUE));
+ final Fraction f12 = Fraction.of(1, 2);
+ Assertions.assertThrows(ArithmeticException.class, () -> f12.pow(Integer.MIN_VALUE));
}
/**
