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316def4ea6
* Add Snell's Law implementation for refraction angle * Add tests for Snell's Law calculations * Update documentation with reference link to Snell's Law Added a reference link to Snell's Law in the documentation. * Prevent instantiation of SnellLaw class Make SnellLaw class non-instantiable by adding a private constructor. * Rename SnellsLawTest to SnellLawTest * Refactor SnellLawTest for clarity and accuracy * Rename SnellsLaw.java to SnellLaw.java * Refactor SnellLawTest with additional assertions * Refactor SnellLaw class constructor and error handling Refactor SnellLaw constructor and error message formatting. * Fix missing newline at end of SnellLawTest.java Ensure that the SnellLawTest class has a newline at the end of the file. * Simplify assertions in SnellLawTest * Simplify exception throwing for total internal reflection
42 lines
1.1 KiB
Java
42 lines
1.1 KiB
Java
package com.thealgorithms.physics;
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import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import org.junit.jupiter.api.Test;
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public class SnellLawTest {
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@Test
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public void testRefractedAngle() {
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double n1 = 1.0; // air
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double n2 = 1.5; // glass
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double theta1 = Math.toRadians(30);
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double theta2 = SnellLaw.refractedAngle(n1, n2, theta1);
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double expected = Math.asin(n1 / n2 * Math.sin(theta1));
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assertEquals(expected, theta2, 1e-12);
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}
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@Test
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public void testTotalInternalReflection() {
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double n1 = 1.5;
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double n2 = 1.0;
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double theta1 = Math.toRadians(60); // large angle
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assertThrows(IllegalArgumentException.class, () -> SnellLaw.refractedAngle(n1, n2, theta1));
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}
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@Test
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public void testNoTotalInternalReflectionAtLowAngles() {
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double n1 = 1.5;
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double n2 = 1.0;
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double theta1 = Math.toRadians(10);
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assertDoesNotThrow(() -> SnellLaw.refractedAngle(n1, n2, theta1));
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}
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}
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