Merge pull request #16479 from sk1418/int-to-short

[int-to-short] int to short

Author: theangrydev

core-java-modules/core-java-numbers-conversions-2/README.md

@@ -0,0 +1 @@
+### Relevant Articles:

core-java-modules/core-java-numbers-conversions-2/pom.xml

@@ -0,0 +1,14 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-conversions.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-numbers-conversions-2</artifactId>
+    <packaging>jar</packaging>
+    <name>core-java-numbers-conversions-2</name>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+</project>

core-java-modules/core-java-numbers-conversions-2/src/test/java/com/baeldung/inttoshort/ConvertIntToShortUnitTest.java

@@ -0,0 +1,55 @@
+package com.baeldung.inttoshort;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+class ConvertIntToShortUnitTest {
+
+    @Test
+    void whenUsingCasting_thenCorrect() {
+        short expected = 42;
+        int i = 42;
+        short result = (short) i;
+        assertEquals(expected, result);
+    }
+
+    @Test
+    void whenUsingIntegerShortValue_thenCorrect() {
+        short expected = 42;
+        Integer intObj = 42;
+        short result = intObj.shortValue();
+        assertEquals(expected, result);
+    }
+
+    @Test
+    void whenIntOutOfShortRange_thenGetTheUnexpectedResult() {
+        int oneMillion = 1_000_000;
+        short result = (short) oneMillion;
+        assertEquals(16960, result);
+
+        int twoMillion = 2_000_000;
+        result = (short) twoMillion;
+        assertEquals(-31616, result);
+    }
+
+    short intToShort(int i) {
+        if (i < Short.MIN_VALUE || i > Short.MAX_VALUE) {
+            throw new IllegalArgumentException("Int is out of short range");
+        }
+        return (short) i;
+    }
+
+    @Test
+    void whenCheckShortRangeBeforeCasting_thenGetExpectedResult() {
+        short expected = 42;
+        int int42 = 42;
+        assertEquals(expected, intToShort(int42));
+
+        int oneMillion = 1_000_000;
+        assertThrows(IllegalArgumentException.class, () -> intToShort(oneMillion));
+
+    }
+
+}

core-java-modules/pom.xml

@@ -36,6 +36,7 @@
         <!-- <module>core-java-modules/core-java-18</module> --> <!-- JAVA-26056 -->
         <!-- <module>core-java-modules/core-java-19</module> --> <!-- JAVA-26056 -->
         <module>core-java-numbers-conversions</module>
+        <module>core-java-numbers-conversions-2</module>
         <module>core-java-9-improvements</module>
         <module>core-java-9-streams</module>
         <module>core-java-9</module>