85 lines
3.1 KiB
Java
85 lines
3.1 KiB
Java
package base;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Locale;
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import java.util.Objects;
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/**
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* @author Georgiy Korneev (kgeorgiy@kgeorgiy.info)
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*/
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@SuppressWarnings("StaticMethodOnlyUsedInOneClass")
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public final class Asserts {
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static {
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Locale.setDefault(Locale.US);
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}
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private Asserts() {
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}
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public static void assertEquals(final String message, final Object expected, final Object actual) {
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final String reason = String.format("%s:%n expected `%s`,%n actual `%s`",
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message, toString(expected), toString(actual));
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assertTrue(reason, Objects.deepEquals(expected, actual));
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}
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public static String toString(final Object value) {
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if (value != null && value.getClass().isArray()) {
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final String result = Arrays.deepToString(new Object[]{value});
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return result.substring(1, result.length() - 1);
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} else {
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return Objects.toString(value);
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}
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}
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public static <T> void assertEquals(final String message, final List<T> expected, final List<T> actual) {
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for (int i = 0; i < Math.min(expected.size(), actual.size()); i++) {
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assertEquals(message + ":" + (i + 1), expected.get(i), actual.get(i));
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}
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assertEquals(message + ": Number of items", expected.size(), actual.size());
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}
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public static void assertTrue(final String message, final boolean value) {
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if (!value) {
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throw error("%s", message);
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}
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}
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public static void assertEquals(final String message, final double expected, final double actual, final double precision) {
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assertTrue(
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String.format("%s: Expected %.12f, found %.12f", message, expected, actual),
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isEqual(expected, actual, precision)
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);
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}
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public static boolean isEqual(final double expected, final double actual, final double precision) {
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final double error = Math.abs(actual - expected);
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return error <= precision
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|| error <= precision * Math.abs(expected)
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|| !Double.isFinite(expected)
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|| Math.abs(expected) > 1e100
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|| Math.abs(expected) < precision && !Double.isFinite(actual);
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}
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public static void assertSame(final String message, final Object expected, final Object actual) {
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assertTrue(String.format("%s: expected same objects: %s and %s", message, expected, actual), expected == actual);
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}
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public static void checkAssert(final Class<?> c) {
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if (!c.desiredAssertionStatus()) {
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throw error("You should enable assertions by running 'java -ea %s'", c.getName());
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}
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}
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public static AssertionError error(final String format, final Object... args) {
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final String message = String.format(format, args);
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return args.length > 0 && args[args.length - 1] instanceof Throwable
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? new AssertionError(message, (Throwable) args[args.length - 1])
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: new AssertionError(message);
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}
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public static void printStackTrace(final String message) {
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new Exception(message).printStackTrace(System.out);
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}
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}
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