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Dev: Added CoordinateConverter for Cartesian and Polar coordinate conversions (#6628)

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Added CoordinateConverter utility class for Cartesian and Polar coordinate conversions
This commit is contained in:
Banula Kumarage
2025-10-05 16:56:13 +05:30
committed by GitHub
parent a0b6c52790
commit e6cb96f390
2 changed files with 91 additions and 0 deletions
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src/test/java/com/thealgorithms/conversions/CoordinateConverterTest.java Normal file
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package com.thealgorithms.conversions;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
public class CoordinateConverterTest {
@ParameterizedTest
@CsvSource({"0, 0, 0, 0", "1, 0, 1, 0", "0, 1, 1, 90", "-1, 0, 1, 180", "0, -1, 1, -90", "3, 4, 5, 53.13010235415599"})
void testCartesianToPolar(double x, double y, double expectedR, double expectedTheta) {
assertArrayEquals(new double[] {expectedR, expectedTheta}, CoordinateConverter.cartesianToPolar(x, y), 1e-9);
}
@ParameterizedTest
@CsvSource({"1, 0, 1, 0", "1, 90, 0, 1", "1, 180, -1, 0", "1, -90, 0, -1", "5, 53.13010235415599, 3, 4"})
void testPolarToCartesian(double r, double theta, double expectedX, double expectedY) {
assertArrayEquals(new double[] {expectedX, expectedY}, CoordinateConverter.polarToCartesian(r, theta), 1e-9);
}
@ParameterizedTest
@CsvSource({"NaN, 1", "1, NaN", "Infinity, 1", "1, Infinity", "-Infinity, 1", "1, -Infinity"})
void testCartesianToPolarInvalidInputs(double x, double y) {
assertThrows(IllegalArgumentException.class, () -> CoordinateConverter.cartesianToPolar(x, y));
}
@ParameterizedTest
@CsvSource({"-1, 0", "1, NaN", "1, Infinity", "1, -Infinity"})
void testPolarToCartesianInvalidInputs(double r, double theta) {
assertThrows(IllegalArgumentException.class, () -> CoordinateConverter.polarToCartesian(r, theta));
}
}