SumOfArithmeticSeriesTest.java

packagecom.thealgorithms.maths;

importstaticorg.junit.jupiter.api.Assertions.assertEquals;
importstaticorg.junit.jupiter.api.Assertions.assertThrows;

importorg.junit.jupiter.api.Test;

publicclassSumOfArithmeticSeriesTest {
@Test
publicvoidtestSumFrom1To10() {
assertEquals(55.0, SumOfArithmeticSeries.sumOfSeries(1.0, 1.0, 10));
 }

@Test
publicvoidtestSumOfOddNumbers1To19() {
assertEquals(100.0, SumOfArithmeticSeries.sumOfSeries(1.0, 2.0, 10));
 }

@Test
publicvoidtestA() {
assertEquals(460.0, SumOfArithmeticSeries.sumOfSeries(1.0, 10.0, 10));
 }

@Test
publicvoidtestB() {
assertEquals(5.5, SumOfArithmeticSeries.sumOfSeries(0.1, 0.1, 10));
 }

@Test
publicvoidtestC() {
assertEquals(49600.0, SumOfArithmeticSeries.sumOfSeries(1, 10, 100));
 }

@Test
publicvoidtestForZeroTerms() {
assertEquals(0.0, SumOfArithmeticSeries.sumOfSeries(1.0, 100.0, 0), 0.00001);
 }

@Test
publicvoidtestIfThrowsExceptionForNegativeNumberOfTerms() {
assertThrows(IllegalArgumentException.class, () -> SumOfArithmeticSeries.sumOfSeries(1.0, 1.0, -1));
 }

@Test
publicvoidtestWithSingleTerm() {
assertEquals(123.0, SumOfArithmeticSeries.sumOfSeries(123.0, 5.0, 1));
 }

@Test
publicvoidtestWithZeroCommonDiff() {
assertEquals(100.0, SumOfArithmeticSeries.sumOfSeries(1.0, 0.0, 100));
 }
}