forked from plusone/plusone-commons
36 lines
1.1 KiB
Java
36 lines
1.1 KiB
Java
package xyz.zhouxy.plusone.commons.util;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import org.junit.jupiter.api.Test;
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class NumberUtilTest {
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@Test
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void testSum() {
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long result = 0;
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for (int i = 0; i < Integer.MAX_VALUE; i++) {
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result += Short.MAX_VALUE;
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}
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System.out.println("Integer.MAX_VALUE: " + Integer.MAX_VALUE);
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System.out.println("result: " + result);
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assertFalse(Integer.MAX_VALUE > result);
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result = 0;
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for (int i = 0; i < Integer.MAX_VALUE; i++) {
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result += Short.MAX_VALUE;
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}
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System.out.println("Long.MAX_VALUE: " + Long.MAX_VALUE);
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System.out.println("result: " + result);
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assertTrue(Long.MAX_VALUE > result);
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result = 0;
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for (int i = 0; i < Integer.MAX_VALUE; i++) {
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result += Integer.MAX_VALUE;
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}
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System.out.println("Long.MAX_VALUE: " + Long.MAX_VALUE);
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System.out.println("result: " + result);
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assertTrue(Long.MAX_VALUE > result);
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}
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}
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