Merge pull request #10210 from vishal1023/BAEL-4236

Bael 4236

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exception/indexoutofbounds/CopyListUsingAddAllMethodDemo.java

@@ -0,0 +1,14 @@
+package com.baeldung.exception.indexoutofbounds;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class CopyListUsingAddAllMethodDemo {
+    static List<Integer> copyList(List<Integer> source) {
+        List<Integer> destination =  new ArrayList<>();
+
+        destination.addAll(source);
+
+        return destination;
+    }
+}

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exception/indexoutofbounds/CopyListUsingCollectionsCopyMethodDemo.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import java.util.Collections;
+import java.util.List;
+
+public class CopyListUsingCollectionsCopyMethodDemo {
+    static void copyList(List<Integer> source, List<Integer> destination) {
+        Collections.copy(destination, source);
+    }
+}

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exception/indexoutofbounds/CopyListUsingConstructorDemo.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class CopyListUsingConstructorDemo {
+    static List<Integer> copyList(List<Integer> source) {
+        return new ArrayList<>(source);
+    }
+}

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exception/indexoutofbounds/CopyListUsingJava8StreamDemo.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class CopyListUsingJava8StreamDemo {
+    static List<Integer> copyList(List<Integer> source) {
+        return source
+                .stream()
+                .collect(Collectors.toList());
+    }
+}

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exception/indexoutofbounds/IndexOutOfBoundsExceptionDemo.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class IndexOutOfBoundsExceptionDemo {
+    static List<Integer> copyList(List<Integer> source) {
+        List<Integer> destination = new ArrayList<>(source.size());
+        Collections.copy(destination, source);
+        return destination;
+    }
+}

core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/exception/indexoutofbounds/CopyListUsingAddAllMethodDemoUnitTest.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class CopyListUsingAddAllMethodDemoUnitTest {
+
+    @Test
+    void whenPassValidArrayList_thenCopyListUsingAddAllMethod() {
+        List<Integer> source = Arrays.asList(11, 22, 33);
+
+        assertEquals(source, CopyListUsingAddAllMethodDemo.copyList(source));
+    }
+}

core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/exception/indexoutofbounds/CopyListUsingCollectionsCopyMethodDemoUnitTest.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class CopyListUsingCollectionsCopyMethodDemoUnitTest {
+    @Test
+    void whenCopyListUsingCollectionsCopy_thenOverrideAllDestinationListValues() {
+        List<Integer> source = Arrays.asList(11, 22, 33);
+        List<Integer> destination = Arrays.asList(1, 2, 3);
+
+        CopyListUsingCollectionsCopyMethodDemo.copyList(source, destination);
+
+        assertEquals(source, destination);
+    }
+
+    @Test
+    void whenCopyListUsingCollectionsCopy_thenOverrideInitialDestinationValuesAndOthersShouldBeUnchanged(){
+        List<Integer> source = Arrays.asList(11, 22, 33);
+        List<Integer> destination = Arrays.asList(1, 2, 3, 4, 5);
+        List<Integer> expectedList = Arrays.asList(11, 22, 33, 4, 5);
+
+        CopyListUsingCollectionsCopyMethodDemo.copyList(source, destination);
+
+        assertEquals(expectedList, destination);
+    }
+}

core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/exception/indexoutofbounds/CopyListUsingConstructorDemoUnitTest.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class CopyListUsingConstructorDemoUnitTest {
+
+    @Test
+    void whenCopyListUsingConstructor_thenMakeACopyOfList() {
+        List<Integer> source = Arrays.asList(11, 22, 33);
+
+        assertEquals(source, CopyListUsingConstructorDemo.copyList(source));
+    }
+}

core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/exception/indexoutofbounds/CopyListUsingJava8StreamDemoUnitTest.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class CopyListUsingJava8StreamDemoUnitTest {
+
+    @Test
+    void whenCopyListUsingStream_thenMakeACopyOfArrayList() {
+        List<Integer> source = Arrays.asList(11, 22, 33);
+
+        assertEquals(source, CopyListUsingJava8StreamDemo.copyList(source));
+    }
+}

core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/exception/indexoutofbounds/IndexOutOfBoundsExceptionDemoUnitTest.java

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+package com.baeldung.exception.indexoutofbounds;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+
+class IndexOutOfBoundsExceptionDemoUnitTest {
+
+    @Test
+    void givenDestinationArrayListSizeIsZero_whenCopySourceArrayListToDestination_thenShouldThrowIndexOutOfBoundsException() {
+        List<Integer> source = Arrays.asList(1, 2, 3, 4, 5);
+
+        assertThrows(IndexOutOfBoundsException.class, () -> IndexOutOfBoundsExceptionDemo.copyList(source));
+    }
+
+    @Test
+    void givenSourceAndDestinationListSizeIsEqual_whenCopySourceArrayListToDestination_thenShouldNotThrowIndexOutOfBoundsException() {
+        List<Integer> source = Collections.emptyList();
+
+        assertEquals(source, IndexOutOfBoundsExceptionDemo.copyList(source));
+    }
+}