diff --git a/src/test/java/com/thealgorithms/maths/AverageTest.java b/src/test/java/com/thealgorithms/maths/AverageTest.java index c5c751938f5d..638739bc4fda 100644 --- a/src/test/java/com/thealgorithms/maths/AverageTest.java +++ b/src/test/java/com/thealgorithms/maths/AverageTest.java @@ -1,33 +1,48 @@ package com.thealgorithms.maths; -import org.junit.jupiter.api.Assertions; +import static org.junit.jupiter.api.Assertions.assertEquals; +import static org.junit.jupiter.api.Assertions.assertThrows; + +import java.util.stream.Stream; import org.junit.jupiter.api.Test; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.Arguments; +import org.junit.jupiter.params.provider.MethodSource; public class AverageTest { private static final double SMALL_VALUE = 0.00001d; - @Test - public void testAverageDouble12() { - double[] numbers = {3d, 6d, 9d, 12d, 15d, 18d, 21d}; - Assertions.assertEquals(12d, Average.average(numbers), SMALL_VALUE); + @ParameterizedTest(name = "average({0}) should be approximately {1}") + @MethodSource("provideDoubleArrays") + void testAverageDouble(double[] numbers, double expected) { + assertEquals(expected, Average.average(numbers), SMALL_VALUE); } - @Test - public void testAverageDouble20() { - double[] numbers = {5d, 10d, 15d, 20d, 25d, 30d, 35d}; - Assertions.assertEquals(20d, Average.average(numbers), SMALL_VALUE); + @ParameterizedTest(name = "average({0}) should be {1}") + @MethodSource("provideIntArrays") + void testAverageInt(int[] numbers, long expected) { + assertEquals(expected, Average.average(numbers)); } @Test - public void testAverageDouble() { - double[] numbers = {1d, 2d, 3d, 4d, 5d, 6d, 7d, 8d}; - Assertions.assertEquals(4.5d, Average.average(numbers), SMALL_VALUE); + void testAverageDoubleThrowsExceptionOnNullOrEmpty() { + assertThrows(IllegalArgumentException.class, () -> Average.average((double[]) null)); + assertThrows(IllegalArgumentException.class, () -> Average.average(new double[0])); } @Test - public void testAverageInt() { - int[] numbers = {2, 4, 10}; - Assertions.assertEquals(5, Average.average(numbers)); + void testAverageIntThrowsExceptionOnNullOrEmpty() { + assertThrows(IllegalArgumentException.class, () -> Average.average((int[]) null)); + assertThrows(IllegalArgumentException.class, () -> Average.average(new int[0])); + } + + private static Stream provideDoubleArrays() { + return Stream.of(Arguments.of(new double[] {3d, 6d, 9d, 12d, 15d, 18d, 21d}, 12d), Arguments.of(new double[] {5d, 10d, 15d, 20d, 25d, 30d, 35d}, 20d), Arguments.of(new double[] {1d, 2d, 3d, 4d, 5d, 6d, 7d, 8d}, 4.5d), Arguments.of(new double[] {0d, 0d, 0d}, 0d), + Arguments.of(new double[] {-1d, -2d, -3d}, -2d), Arguments.of(new double[] {1e-10, 1e-10, 1e-10}, 1e-10)); + } + + private static Stream provideIntArrays() { + return Stream.of(Arguments.of(new int[] {2, 4, 10}, 5L), Arguments.of(new int[] {0, 0, 0}, 0L), Arguments.of(new int[] {-1, -2, -3}, -2L), Arguments.of(new int[] {1, 1, 1, 1, 1}, 1L)); } } pFad - Phonifier reborn

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