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Add different types of Mean (#4339)

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Punit Patel
2023-09-02 22:52:28 +05:30
committed by GitHub
parent cfdbc413f1
commit a96ad84fac
3 changed files with 132 additions and 2 deletions
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src/test/java/com/thealgorithms/maths/MeansTest.java Normal file
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package com.thealgorithms.maths;
import static org.junit.jupiter.api.Assertions.*;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.Vector;
import org.assertj.core.util.Lists;
import org.assertj.core.util.Sets;
import org.junit.jupiter.api.Test;
class MeansTest {
@Test
void arithmeticMeanZeroNumbers() throws IllegalArgumentException {
List<Double> numbers = new ArrayList<>();
assertThrows(IllegalArgumentException.class, () -> Means.arithmetic(numbers));
}
@Test
void geometricMeanZeroNumbers() throws IllegalArgumentException {
List<Double> numbers = new ArrayList<>();
assertThrows(IllegalArgumentException.class, () -> Means.geometric(numbers));
}
@Test
void harmonicMeanZeroNumbers() throws IllegalArgumentException {
List<Double> numbers = new ArrayList<>();
assertThrows(IllegalArgumentException.class, () -> Means.harmonic(numbers));
}
@Test
void arithmeticMeanSingleNumber() {
List<Double> numbers = Lists.newArrayList(2.5);
assertEquals(2.5, Means.arithmetic(numbers));
}
@Test
void geometricMeanSingleNumber() {
Set<Double> numbers = Sets.newHashSet(Lists.newArrayList(2.5));
assertEquals(2.5, Means.geometric(numbers));
}
@Test
void harmonicMeanSingleNumber() {
LinkedHashSet<Double> numbers = Sets.newLinkedHashSet(2.5);
assertEquals(2.5, Means.harmonic(numbers));
}
@Test
void arithmeticMeanMultipleNumbers() {
Set<Double> numbers = Sets.newTreeSet(1d, 2.5, 83.3, 25.9999, 46.0001, 74.7, 74.5);
assertEquals(44, Means.arithmetic(numbers));
}
@Test
void geometricMeanMultipleNumbers() {
LinkedList<Double> numbers = new LinkedList<>() {};
numbers.addAll(Lists.newArrayList(1d, 2d, 3d, 4d, 5d, 6d, 1.25));
assertEquals(2.6426195539300585, Means.geometric(numbers));
}
@Test
void harmonicMeanMultipleNumbers() {
Vector<Double> numbers = new Vector<>(Lists.newArrayList(1d, 2.5, 83.3, 25.9999, 46.0001, 74.7, 74.5));
assertEquals(4.6697322801074135, Means.harmonic(numbers));
}
}