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Add tests for Average (#3652)

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Philippe CANCELLIER 2022-10-25 14:00:53 +02:00 committed by GitHub
parent d88b70113f
commit 6235fd6505
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2 changed files with 29 additions and 28 deletions
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31
src/main/java/com/thealgorithms/maths/Average.java
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@ -5,25 +5,6 @@ package com.thealgorithms.maths;
*/
public class Average {
private static final double SMALL_VALUE = 0.00001f;
public static void main(String[] args) {
assert Math.abs(
average(new double[] { 3, 6, 9, 12, 15, 18, 21 }) - 12
) <
SMALL_VALUE;
assert Math.abs(
average(new double[] { 5, 10, 15, 20, 25, 30, 35 }) - 20
) <
SMALL_VALUE;
assert Math.abs(
average(new double[] { 1, 2, 3, 4, 5, 6, 7, 8 }) - 4.5
) <
SMALL_VALUE;
int[] array = { 2, 4, 10 };
assert average(array) == 5;
}
/**
* Calculate average of a list of numbers
*
@ -41,15 +22,15 @@ public class Average {
/**
* find average value of int array
*
* @param array the array contains element and the sum does not excess long
* value limit
* @param numbers the array contains element and the sum does not excess long
* value limit
* @return average value
*/
public static int average(int[] array) {
public static int average(int[] numbers) {
long sum = 0;
for (int i = 0; i < array.length; ++i) {
sum += array[i];
for (int number : numbers) {
sum += number;
}
return (int) (sum / array.length);
return (int) (sum / numbers.length);
}
}

26
src/test/java/com/thealgorithms/maths/AverageTest.java
View File

@ -5,10 +5,30 @@ import org.junit.jupiter.api.Test;
public class AverageTest {
double[] numbers = { 3, 6, 9, 12, 15, 18, 21 };
private static final double SMALL_VALUE = 0.00001d;
@Test
public void testAverage() {
Assertions.assertEquals(12, Average.average(numbers));
public void testAverage_double_12() {
double[] numbers = {3d, 6d, 9d, 12d, 15d, 18d, 21d};
Assertions.assertEquals(12d, Average.average(numbers), SMALL_VALUE);
}
@Test
public void testAverage_double_20() {
double[] numbers = {5d, 10d, 15d, 20d, 25d, 30d, 35d};
Assertions.assertEquals(20d, Average.average(numbers), SMALL_VALUE);
}
@Test
public void testAverage_double_4_5() {
double[] numbers = {1d, 2d, 3d, 4d, 5d, 6d, 7d, 8d};
Assertions.assertEquals(4.5d, Average.average(numbers), SMALL_VALUE);
}
@Test
public void testAverage_int_5() {
int[] numbers = {2, 4, 10};
Assertions.assertEquals(5, Average.average(numbers));
}
}