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import org.testng.annotations.Test;
import java.util.Comparator;
import java.util.function.BinaryOperator;
import java.util.function.IntBinaryOperator;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;
import java.util.function.DoubleBinaryOperator;
import java.util.function.LongBinaryOperator;
/**
* @test
* @run testng PrimitiveSumMinMaxTest
* @summary test conversion of primitive wrapper sum, min, max, and compareTo methods to functional interfaces
*
* @author Brian Goetz
*/
@Test
public class PrimitiveSumMinMaxTest {
public void testBooleanMethods() {
BinaryOperator<Boolean> and = Boolean::logicalAnd;
BinaryOperator<Boolean> or = Boolean::logicalOr;
BinaryOperator<Boolean> xor = Boolean::logicalXor;
Comparator<Boolean> cmp = Boolean::compare;
assertTrue(and.apply(true, true));
assertFalse(and.apply(true, false));
assertFalse(and.apply(false, true));
assertFalse(and.apply(false, false));
assertTrue(or.apply(true, true));
assertTrue(or.apply(true, false));
assertTrue(or.apply(false, true));
assertFalse(or.apply(false, false));
assertFalse(xor.apply(true, true));
assertTrue(xor.apply(true, false));
assertTrue(xor.apply(false, true));
assertFalse(xor.apply(false, false));
assertEquals(Boolean.TRUE.compareTo(Boolean.TRUE), cmp.compare(true, true));
assertEquals(Boolean.TRUE.compareTo(Boolean.FALSE), cmp.compare(true, false));
assertEquals(Boolean.FALSE.compareTo(Boolean.TRUE), cmp.compare(false, true));
assertEquals(Boolean.FALSE.compareTo(Boolean.FALSE), cmp.compare(false, false));
};
public void testIntMethods() {
BinaryOperator<Integer> sum1 = Integer::sum;
IntBinaryOperator sum2 = Integer::sum;
BinaryOperator<Integer> max1 = Integer::max;
IntBinaryOperator max2 = Integer::max;
BinaryOperator<Integer> min1 = Integer::min;
IntBinaryOperator min2 = Integer::min;
Comparator<Integer> cmp = Integer::compare;
int[] numbers = { -1, 0, 1, 100, Integer.MAX_VALUE, Integer.MIN_VALUE };
for (int i : numbers) {
for (int j : numbers) {
assertEquals(i+j, (int) sum1.apply(i, j));
assertEquals(i+j, sum2.applyAsInt(i, j));
assertEquals(Math.max(i,j), (int) max1.apply(i, j));
assertEquals(Math.max(i,j), max2.applyAsInt(i, j));
assertEquals(Math.min(i,j), (int) min1.apply(i, j));
assertEquals(Math.min(i,j), min2.applyAsInt(i, j));
assertEquals(((Integer) i).compareTo(j), cmp.compare(i, j));
}
}
}
public void testLongMethods() {
BinaryOperator<Long> sum1 = Long::sum;
LongBinaryOperator sum2 = Long::sum;
BinaryOperator<Long> max1 = Long::max;
LongBinaryOperator max2 = Long::max;
BinaryOperator<Long> min1 = Long::min;
LongBinaryOperator min2 = Long::min;
Comparator<Long> cmp = Long::compare;
long[] numbers = { -1, 0, 1, 100, Long.MAX_VALUE, Long.MIN_VALUE };
for (long i : numbers) {
for (long j : numbers) {
assertEquals(i+j, (long) sum1.apply(i, j));
assertEquals(i+j, sum2.applyAsLong(i, j));
assertEquals(Math.max(i,j), (long) max1.apply(i, j));
assertEquals(Math.max(i,j), max2.applyAsLong(i, j));
assertEquals(Math.min(i,j), (long) min1.apply(i, j));
assertEquals(Math.min(i,j), min2.applyAsLong(i, j));
assertEquals(((Long) i).compareTo(j), cmp.compare(i, j));
}
}
}
public void testFloatMethods() {
BinaryOperator<Float> sum1 = Float::sum;
BinaryOperator<Float> max1 = Float::max;
BinaryOperator<Float> min1 = Float::min;
Comparator<Float> cmp = Float::compare;
float[] numbers = { -1, 0, 1, 100, Float.MAX_VALUE, Float.MIN_VALUE };
for (float i : numbers) {
for (float j : numbers) {
assertEquals(i+j, (float) sum1.apply(i, j));
assertEquals(Math.max(i,j), (float) max1.apply(i, j));
assertEquals(Math.min(i,j), (float) min1.apply(i, j));
assertEquals(((Float) i).compareTo(j), cmp.compare(i, j));
}
}
}
public void testDoubleMethods() {
BinaryOperator<Double> sum1 = Double::sum;
DoubleBinaryOperator sum2 = Double::sum;
BinaryOperator<Double> max1 = Double::max;
DoubleBinaryOperator max2 = Double::max;
BinaryOperator<Double> min1 = Double::min;
DoubleBinaryOperator min2 = Double::min;
Comparator<Double> cmp = Double::compare;
double[] numbers = { -1, 0, 1, 100, Double.MAX_VALUE, Double.MIN_VALUE };
for (double i : numbers) {
for (double j : numbers) {
assertEquals(i+j, (double) sum1.apply(i, j));
assertEquals(i+j, sum2.applyAsDouble(i, j));
assertEquals(Math.max(i,j), (double) max1.apply(i, j));
assertEquals(Math.max(i,j), max2.applyAsDouble(i, j));
assertEquals(Math.min(i,j), (double) min1.apply(i, j));
assertEquals(Math.min(i,j), min2.applyAsDouble(i, j));
assertEquals(((Double) i).compareTo(j), cmp.compare(i, j));
}
}
}
}