Fixed conflicts

libraries/src/main/java/com/baeldung/derive4j/adt/Either.java

@@ -0,0 +1,10 @@
+package com.baeldung.derive4j.adt;
+
+import org.derive4j.Data;
+
+import java.util.function.Function;
+
+@Data
+interface Either<A,B>{
+    <X> X match(Function<A, X> left, Function<B, X> right);
+}

libraries/src/main/java/com/baeldung/derive4j/lazy/LazyRequest.java

@@ -0,0 +1,21 @@
+package com.baeldung.derive4j.lazy;
+
+import org.derive4j.Data;
+import org.derive4j.Derive;
+import org.derive4j.Make;
+
+@Data(value = @Derive(
+    inClass = "{ClassName}Impl",
+    make = {Make.lazyConstructor, Make.constructors}
+))
+public interface LazyRequest {
+    interface Cases<R>{
+        R GET(String path);
+        R POST(String path, String body);
+        R PUT(String path, String body);
+        R DELETE(String path);
+    }
+
+    <R> R match(LazyRequest.Cases<R> method);
+}
+

libraries/src/main/java/com/baeldung/derive4j/pattern/HTTPRequest.java

@@ -0,0 +1,15 @@
+package com.baeldung.derive4j.pattern;
+
+import org.derive4j.Data;
+
+@Data
+interface HTTPRequest {
+    interface Cases<R>{
+        R GET(String path);
+        R POST(String path, String body);
+        R PUT(String path, String body);
+        R DELETE(String path);
+    }
+
+     <R> R match(Cases<R> method);
+}

libraries/src/main/java/com/baeldung/derive4j/pattern/HTTPResponse.java

@@ -0,0 +1,19 @@
+package com.baeldung.derive4j.pattern;
+
+public class HTTPResponse {
+    private int  statusCode;
+    private String responseBody;
+
+    public int getStatusCode() {
+        return statusCode;
+    }
+
+    public String getResponseBody() {
+        return responseBody;
+    }
+
+    public HTTPResponse(int statusCode, String responseBody) {
+        this.statusCode = statusCode;
+        this.responseBody = responseBody;
+    }
+}

libraries/src/main/java/com/baeldung/derive4j/pattern/HTTPServer.java

@@ -0,0 +1,17 @@
+package com.baeldung.derive4j.pattern;
+
+
+public class HTTPServer {
+    public static String GET_RESPONSE_BODY = "Success!";
+    public static String PUT_RESPONSE_BODY = "Resource Created!";
+    public static String POST_RESPONSE_BODY = "Resource Updated!";
+    public static String DELETE_RESPONSE_BODY = "Resource Deleted!";
+
+    public HTTPResponse acceptRequest(HTTPRequest request) {
+       return HTTPRequests.caseOf(request)
+                .GET((path) -> new HTTPResponse(200, GET_RESPONSE_BODY))
+                .POST((path,body) -> new HTTPResponse(201, POST_RESPONSE_BODY))
+                .PUT((path,body) -> new HTTPResponse(200, PUT_RESPONSE_BODY))
+                .DELETE(path -> new HTTPResponse(200, DELETE_RESPONSE_BODY));
+    }
+}

libraries/src/test/java/com/baeldung/derive4j/adt/EitherUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.derive4j.adt;
+
+import org.assertj.core.api.Assertions;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+import org.mockito.junit.MockitoJUnitRunner;
+
+import java.util.Optional;
+import java.util.function.Function;
+@RunWith(MockitoJUnitRunner.class)
+public class EitherUnitTest {
+    @Test
+    public void testEitherIsCreatedFromRight() {
+       Either<Exception, String> either = Eithers.right("Okay");
+       Optional<Exception> leftOptional = Eithers.getLeft(either);
+       Optional<String> rightOptional = Eithers.getRight(either);
+       Assertions.assertThat(leftOptional).isEmpty();
+       Assertions.assertThat(rightOptional).hasValue("Okay");
+
+    }
+
+    @Test
+    public void testEitherIsMatchedWithRight() {
+        Either<Exception, String> either = Eithers.right("Okay");
+        Function<Exception, String> leftFunction = Mockito.mock(Function.class);
+        Function<String, String> rightFunction = Mockito.mock(Function.class);
+        either.match(leftFunction, rightFunction);
+        Mockito.verify(rightFunction, Mockito.times(1)).apply("Okay");
+        Mockito.verify(leftFunction, Mockito.times(0)).apply(Mockito.any(Exception.class));
+    }
+
+}

libraries/src/test/java/com/baeldung/derive4j/lazy/LazyRequestUnitTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.derive4j.lazy;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import java.util.function.Supplier;
+
+public class LazyRequestUnitTest {
+
+    @Test
+    public void givenLazyContstructedRequest_whenRequestIsReferenced_thenRequestIsLazilyContructed() {
+        LazyRequestSupplier mockSupplier = Mockito.spy(new LazyRequestSupplier());
+
+        LazyRequest request = LazyRequestImpl.lazy(() -> mockSupplier.get());
+        Mockito.verify(mockSupplier, Mockito.times(0)).get();
+        Assert.assertEquals(LazyRequestImpl.getPath(request), "http://test.com/get");
+        Mockito.verify(mockSupplier, Mockito.times(1)).get();
+
+    }
+
+    class LazyRequestSupplier implements Supplier<LazyRequest> {
+        @Override
+        public LazyRequest get() {
+            return LazyRequestImpl.GET("http://test.com/get");
+        }
+    }
+}

libraries/src/test/java/com/baeldung/derive4j/pattern/HTTPRequestUnitTest.java

@@ -0,0 +1,22 @@
+package com.baeldung.derive4j.pattern;
+
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+public class HTTPRequestUnitTest {
+    public static HTTPServer server;
+
+    @BeforeClass
+    public static void setUp() {
+        server = new HTTPServer();
+    }
+
+    @Test
+    public void givenHttpGETRequest_whenRequestReachesServer_thenProperResponseIsReturned() {
+        HTTPRequest postRequest = HTTPRequests.POST("http://test.com/post", "Resource");
+        HTTPResponse response = server.acceptRequest(postRequest);
+        Assert.assertEquals(201, response.getStatusCode());
+        Assert.assertEquals(HTTPServer.POST_RESPONSE_BODY, response.getResponseBody());
+    }
+}

libraries/src/test/java/com/baeldung/fj/FunctionalJavaUnitTest.java

@@ -1,6 +1,8 @@
 package com.baeldung.fj;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
 import org.junit.Test;
 
@@ -30,7 +32,7 @@ public class FunctionalJavaUnitTest {
         List<Integer> fList1 = fList.map(timesTwo);
         List<Integer> fList2 = fList.map(i -> i * 2);
 
-        assertEquals(fList1.equals(fList2), true);
+        assertTrue(fList1.equals(fList2));
     }
 
     @Test
@@ -41,7 +43,7 @@ public class FunctionalJavaUnitTest {
         List<Integer> fList2 = fList.map(plusOne).map(timesTwo);
         Show.listShow(Show.intShow).println(fList2);
 
-        assertEquals(fList1.equals(fList2), false);
+        assertFalse(fList1.equals(fList2));
     }
 
     @Test
@@ -49,10 +51,8 @@ public class FunctionalJavaUnitTest {
         List<Integer> fList = List.list(3, 4, 5, 6);
         List<Boolean> evenList = fList.map(isEven);
         List<Boolean> evenListTrueResult = List.list(false, true, false, true);
-        List<Boolean> evenListFalseResult = List.list(true, false, false, true);
 
-        assertEquals(evenList.equals(evenListTrueResult), true);
-        assertEquals(evenList.equals(evenListFalseResult), false);
+        assertTrue(evenList.equals(evenListTrueResult));
     }
 
     @Test
@@ -60,10 +60,8 @@ public class FunctionalJavaUnitTest {
         List<Integer> fList = List.list(3, 4, 5, 6);
         fList = fList.map(i -> i + 100);
         List<Integer> resultList = List.list(103, 104, 105, 106);
-        List<Integer> falseResultList = List.list(15, 504, 105, 106);
 
-        assertEquals(fList.equals(resultList), true);
-        assertEquals(fList.equals(falseResultList), false);
+        assertTrue(fList.equals(resultList));
     }
 
     @Test
@@ -71,23 +69,19 @@ public class FunctionalJavaUnitTest {
         Array<Integer> array = Array.array(3, 4, 5, 6);
         Array<Integer> filteredArray = array.filter(isEven);
         Array<Integer> result = Array.array(4, 6);
-        Array<Integer> wrongResult = Array.array(3, 5);
 
-        assertEquals(filteredArray.equals(result), true);
-        assertEquals(filteredArray.equals(wrongResult), false);
+        assertTrue(filteredArray.equals(result));
     }
 
     @Test
     public void checkForLowerCase_givenStringArray_returnResult() {
         Array<String> array = Array.array("Welcome", "To", "baeldung");
+        assertTrue(array.exists(s -> List.fromString(s).forall(Characters.isLowerCase)));
+ 
         Array<String> array2 = Array.array("Welcome", "To", "Baeldung");
-        Boolean isExist = array.exists(s -> List.fromString(s).forall(Characters.isLowerCase));
-        Boolean isExist2 = array2.exists(s -> List.fromString(s).forall(Characters.isLowerCase));
-        Boolean isAll = array.forall(s -> List.fromString(s).forall(Characters.isLowerCase));
-
-        assertEquals(isExist, true);
-        assertEquals(isExist2, false);
-        assertEquals(isAll, false);
+        assertFalse(array2.exists(s -> List.fromString(s).forall(Characters.isLowerCase)));
+ 
+        assertFalse(array.forall(s -> List.fromString(s).forall(Characters.isLowerCase)));
     }
 
     @Test
@@ -102,9 +96,9 @@ public class FunctionalJavaUnitTest {
         Option<Integer> result2 = n2.bind(function);
         Option<Integer> result3 = n3.bind(function);
 
-        assertEquals(result1, Option.none());
-        assertEquals(result2, Option.some(102));
-        assertEquals(result3, Option.none());
+        assertEquals(Option.none(), result1);
+        assertEquals(Option.some(102), result2);
+        assertEquals(Option.none(), result3);
     }
 
     @Test
@@ -112,11 +106,11 @@ public class FunctionalJavaUnitTest {
         Array<Integer> intArray = Array.array(17, 44, 67, 2, 22, 80, 1, 27);
         int sumAll = intArray.foldLeft(Integers.add, 0);
 
-        assertEquals(sumAll, 260);
+        assertEquals(260, sumAll);
 
         int sumEven = intArray.filter(isEven).foldLeft(Integers.add, 0);
 
-        assertEquals(sumEven, 148);
+        assertEquals(148, sumEven);
     }
-
+    
 }