webFlux with component and Integration test Cases

ReactiveWebfluxMongo/.gitignore

+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

ReactiveWebfluxMongo/build.gradle

+plugins {
+	id 'org.springframework.boot' version '2.3.0.RELEASE'
+	id 'io.spring.dependency-management' version '1.0.9.RELEASE'
+	id 'java'
+}
+
+group = 'com.nisum'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '1.8'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-data-mongodb-reactive'
+	implementation 'org.springframework.boot:spring-boot-starter-webflux'
+  	implementation  'org.springframework.boot:spring-boot-starter-aop'
+ 	compileOnly 'org.projectlombok:lombok'
+	developmentOnly 'org.springframework.boot:spring-boot-devtools'
+	annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'
+	annotationProcessor 'org.projectlombok:lombok'
+	testImplementation'org.springframework.boot:spring-boot-starter-test'
+	testImplementation 'io.projectreactor:reactor-test'
+	testImplementation('de.flapdoodle.embed:de.flapdoodle.embed.mongo')
+
+}
+
+test {
+	useJUnitPlatform()
+}

ReactiveWebfluxMongo/gradle/wrapper/gradle-wrapper.properties

+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

ReactiveWebfluxMongo/gradlew

+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

ReactiveWebfluxMongo/gradlew.bat

+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

ReactiveWebfluxMongo/settings.gradle

+rootProject.name = 'ReactiveWebfluxMongo'

ReactiveWebfluxMongo/src/main/java/com/nisum/ReactiveWebfluxMongoApplication.java

+package com.nisum;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ReactiveWebfluxMongoApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ReactiveWebfluxMongoApplication.class, args);
+	}
+
+}

ReactiveWebfluxMongo/src/main/java/com/nisum/bean/Item.java

+package com.nisum.bean;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Document(collection = "Item")
+
+public class Item {
+
+    @Id
+    private String id;
+    private String name;
+    private Double price;
+    private String description;
+}

ReactiveWebfluxMongo/src/main/java/com/nisum/controller/ItemController.java

+package com.nisum.controller;
+
+
+
+import com.nisum.bean.Item;
+import com.nisum.repository.ItemReactiveRepository;
+import com.nisum.service.ItemService;
+import com.nisum.service.ItemServiceImpl;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+
+@RestController
+@Slf4j
+public class ItemController {
+
+    @Autowired
+    ItemReactiveRepository itemReactiveRepository;
+
+    @Autowired
+    ItemService itemService;
+
+    @PostMapping("/saveItem")
+    @ResponseStatus(HttpStatus.CREATED)
+    public Mono<Item> saveItem(@RequestBody Item item){
+
+        return itemService.saveItem(item);
+
+
+    }
+
+    @GetMapping("/itemDetails"+"/{id}")
+    public Mono<ResponseEntity<Item>> getOneItem(@PathVariable String id){
+
+        return itemReactiveRepository.findById(id)
+                .map((item) -> new ResponseEntity<>(item, HttpStatus.OK))
+                .defaultIfEmpty(new ResponseEntity<>(HttpStatus.NOT_FOUND));
+
+    }
+
+    @GetMapping("/getItem"+"/{id}")
+    public Mono<ResponseEntity<Item>> getItem(@PathVariable String id){
+
+        return itemService.getItem(id)
+                .map((item) -> new ResponseEntity<>(item, HttpStatus.OK))
+                .defaultIfEmpty(new ResponseEntity<>(HttpStatus.NOT_FOUND));
+
+    }
+
+
+    @DeleteMapping("delete"+"/{id}")
+    public Mono<Void> deleteItem(@PathVariable String id){
+
+        return itemReactiveRepository.deleteById(id);
+
+
+    }
+
+
+    @PutMapping("/update"+"/{id}")
+    public Mono<ResponseEntity<Item>> updateItem(@PathVariable String id,
+                                                 @RequestBody Item item){
+
+        return itemReactiveRepository.findById(id)
+                .flatMap(currentItem -> {
+
+                    currentItem.setPrice(item.getPrice());
+                    currentItem.setDescription(item.getDescription());
+                    return itemReactiveRepository.save(currentItem);
+                })
+                .map(updatedItem -> new ResponseEntity<>(updatedItem, HttpStatus.OK))
+                .defaultIfEmpty(new ResponseEntity<>(HttpStatus.NOT_FOUND));
+
+    }
+
+    @PutMapping("/updateItem")
+    public Mono<Item> updateItemDetails(@RequestBody Item item){
+
+                   return itemService.updateItem(item);
+
+
+
+    }
+
+    @GetMapping("/getAllItems")
+    public Flux<Item> getAllItems(){
+
+        return itemService.getAllItems();
+
+    }
+
+
+}

ReactiveWebfluxMongo/src/main/java/com/nisum/repository/ItemReactiveRepository.java

+package com.nisum.repository;
+
+
+import com.nisum.bean.Item;
+import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
+import reactor.core.publisher.Mono;
+
+public interface ItemReactiveRepository extends ReactiveMongoRepository<Item, String> {
+    Mono<Item> findByDescription(String description);
+
+}

ReactiveWebfluxMongo/src/main/java/com/nisum/service/ItemService.java

+package com.nisum.service;
+
+import com.nisum.bean.Item;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+public interface ItemService {
+
+    public Mono<Item> saveItem(Item item);
+    public Mono<Item> getItem(String id);
+
+    public Mono<Item> updateItem(Item item);
+
+
+    public Flux<Item> getAllItems();
+
+}

ReactiveWebfluxMongo/src/main/java/com/nisum/service/ItemServiceImpl.java

+package com.nisum.service;
+
+import com.nisum.bean.Item;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+@Service
+public class ItemServiceImpl implements ItemService {
+
+    @Autowired
+    ReactiveMongoRepository reactiveMongoRepository;
+
+
+    @Override
+    public Mono<Item> saveItem(Item item) {
+
+
+        return reactiveMongoRepository.save(item);
+    }
+
+    @Override
+    public Mono<Item> getItem(String id) {
+
+
+        return reactiveMongoRepository.findById(id);
+    }
+
+    @Override
+    public Mono<Item> updateItem(Item item) {
+
+        return reactiveMongoRepository.save(item);
+    }
+
+    @Override
+    public Flux<Item> getAllItems() {
+        return reactiveMongoRepository.findAll();
+    }
+
+
+}

ReactiveWebfluxMongo/src/main/resources/application.yml

+server:
+  port: 8082
+  data:
+    mongo:
+      host: localhost
+      port: 27017
+      mongodb :
+        database: test

ReactiveWebfluxMongo/src/test/java/com/nisum/ItemControllerTest.java

+package com.nisum;
+
+
+import com.nisum.bean.Item;
+import com.nisum.repository.ItemReactiveRepository;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.util.Arrays;
+import java.util.List;
+
+@SpringBootTest
+@RunWith(SpringRunner.class)
+@DirtiesContext
+@AutoConfigureWebTestClient
+
+public class ItemControllerTest {
+
+    @Autowired
+    WebTestClient webTestClient;
+
+    @Autowired
+    ItemReactiveRepository itemReactiveRepository;
+
+
+
+
+
+    public List<Item> data() {
+
+        return Arrays.asList(
+                new Item(null, "Samsung TV", 399.99,"Super"),
+                new Item("", "LG TV", 329.99,"Good"),
+                new Item("2", "Apple Watch", 349.99,"Avg"),
+                new Item("3", "Beats HeadPhones", 149.99,"Bad"));
+    }
+    @Before
+    public void setUp(){
+        itemReactiveRepository.deleteAll()
+                .thenMany(Flux.fromIterable(data()))
+                .flatMap(itemReactiveRepository::save)
+                .doOnNext((item -> {
+                    System.out.println("Inserted item is : " + item);
+                }))
+                .blockLast();
+    }
+
+    @Test
+    public void getAllItemsTest(){
+        webTestClient.get().uri("/getAllItems")
+                .exchange()
+                .expectStatus().isOk()
+                .expectHeader().contentType(MediaType.APPLICATION_JSON_VALUE)
+                .expectBodyList(Item.class)
+                .hasSize(4);
+
+    }
+    @Test
+    public void saveItemTest(){
+
+        Item item = new Item("123", "Iphone X", 999.99,"Good");
+
+        webTestClient.post().uri("/saveItem")
+                .contentType(MediaType.APPLICATION_JSON_UTF8)
+                .body(Mono.just(item), Item.class)
+                .exchange()
+                .expectStatus().isCreated()
+                .expectBody()
+                .jsonPath("$.id").isNotEmpty()
+                .jsonPath("$.name").isEqualTo("Iphone X")
+                .jsonPath("$.price").isEqualTo(999.99)
+                .jsonPath("$.description").isEqualTo("Good");
+
+
+    }
+    @Test
+    public void updateItemTest(){
+
+        double newPrice =129.99;
+        Item item = new Item(null, "Apple Watch", newPrice,"Avg");
+
+        webTestClient.put().uri( "/update"+"/{id}","2")
+                .contentType(MediaType.APPLICATION_JSON_UTF8)
+                .accept(MediaType.APPLICATION_JSON_UTF8)
+                .body(Mono.just(item), Item.class)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody()
+                .jsonPath("$.price",newPrice);
+
+    }
+
+    @Test
+    public void updateItem_notFoundTest(){
+        double newPrice =129.99;
+        Item item = new Item(null,"Beats HeadPhones", newPrice,"Good");
+
+        webTestClient.put().uri("/update"+"/{id}","123")
+                .contentType(MediaType.APPLICATION_JSON_UTF8)
+                .accept(MediaType.APPLICATION_JSON_UTF8)
+                .body(Mono.just(item), Item.class)
+                .exchange()
+                .expectStatus().isNotFound();
+
+    }
+    @Test
+    public void deleteItemTest(){
+
+        webTestClient.delete().uri("/delete"+"/{id})", "2")
+                .accept(MediaType.APPLICATION_JSON_UTF8)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody(Void.class);
+
+    }
+}

ReactiveWebfluxMongo/src/test/java/com/nisum/ItemDetailsIntegrationTest.java

+package com.nisum;
+
+import com.nisum.bean.Item;
+import com.nisum.controller.ItemController;
+import com.nisum.repository.ItemReactiveRepository;
+import com.nisum.service.ItemService;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import reactor.test.StepVerifier;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.refEq;
+import static org.mockito.Mockito.when;
+
+@SpringBootTest
+@RunWith(SpringRunner.class)
+@AutoConfigureWebTestClient
+public class ItemDetailsIntegrationTest {
+
+
+
+    @Autowired
+    private WebTestClient webTestClient;
+
+    @InjectMocks
+    private ItemController itemController;
+
+    @Mock
+    private ItemService itemService;
+
+    @Mock
+    private ItemReactiveRepository itemReactiveRepository;
+    public List<Item> data() {
+
+        return Arrays.asList(
+                new Item(null, "Samsung TV", 399.99,"Super"),
+                new Item("", "LG TV", 329.99,"Good"),
+                new Item("2", "Apple Watch", 349.99,"Avg"),
+                new Item("3", "Beats HeadPhones", 149.99,"Bad"));
+    }
+
+
+    @Test
+    public void save_UsingWebTestClient() {
+        Item item=new Item("1","Beats HeadPhones", 129.33,"Good");
+        webTestClient.post().uri("/saveItem").
+                contentType(MediaType.APPLICATION_JSON).body(Mono.just(item), Item.class)
+                .exchange()
+                .expectStatus()
+                .isCreated()
+                .expectBody()
+                .jsonPath("$.id")
+                .isEqualTo("1");
+    }
+
+    @Test
+    public void saveItemTest() {
+        Item item=new Item("1","Beats HeadPhones", new Double(129.33),"Good");
+
+        when(itemService.saveItem(item)).thenReturn(Mono.just(item));
+
+        Mono<Item> itemMono = itemController.saveItem(item);
+
+        StepVerifier.create(itemMono).expectNextMatches(responseDetails->{
+            assertEquals("1", responseDetails.getId());
+            assertEquals("Beats HeadPhones", responseDetails.getName());
+
+            assertEquals(new Double(129.33), responseDetails.getPrice());
+            assertEquals("Good", responseDetails.getDescription());
+           return true;
+        }).expectComplete().verify();
+    }
+
+
+
+    @Test
+    public void getItemTest() {
+
+        Item item=new Item("1","Beats HeadPhones", new Double(129.33),"Good");
+
+        when(itemService.getItem("1")).thenReturn(Mono.just(item));
+
+        Mono<ResponseEntity<Item>> itemMono = itemController.getItem("1");
+
+        StepVerifier.create(itemMono).expectNextMatches(responseDetails->{
+            assertEquals("1", responseDetails.getBody().getId());
+            assertEquals("Beats HeadPhones", responseDetails.getBody().getName());
+
+            assertEquals(new Double(129.33), responseDetails.getBody().getPrice());
+            assertEquals("Good", responseDetails.getBody().getDescription());
+            return true;
+        }).expectComplete().verify();
+    }
+
+    @Test
+    public void updateItemTest() {
+
+        Item item=new Item("1","Beats HeadPhones", new Double(129.33),"Good");
+
+        when(itemService.getItem("1")).thenReturn(Mono.just(item));
+
+        Mono<ResponseEntity<Item>> itemMono = itemController.getItem("1");
+
+        StepVerifier.create(itemMono).expectNextMatches(responseDetails->{
+            assertEquals("1", responseDetails.getBody().getId());
+            assertEquals("Beats HeadPhones", responseDetails.getBody().getName());
+
+            assertEquals(new Double(129.33), responseDetails.getBody().getPrice());
+            assertEquals("Good", responseDetails.getBody().getDescription());
+            return true;
+        }).expectComplete().verify();
+    }
+
+    @Test
+       public void updateItemDetailsTest(){
+        Item item=new Item("1","Beats HeadPhones", new Double(129.33),"Good");
+
+        Item item2=new Item("1","Beats HeadPhones", new Double(129.33),"AVG");
+
+
+        when(itemService.updateItem(item)).thenReturn(Mono.just(item2));
+
+        Mono<Item> itemMono = itemController.updateItemDetails(item);
+        StepVerifier.create(itemMono).expectNextMatches(responseDetails->{
+            assertEquals("1", responseDetails.getId());
+            assertEquals("Beats HeadPhones", responseDetails.getName());
+
+            assertEquals(new Double(129.33), responseDetails.getPrice());
+            assertEquals("AVG", responseDetails.getDescription());
+            return true;
+        }).expectComplete().verify();
+    }
+
+   @Test
+    public void getAllItems(){
+
+       List<Item> items = Arrays.asList(
+               new Item(null, "Samsung TV", 399.99, "Super"),
+               new Item("", "LG TV", 329.99, "Good"),
+               new Item("2", "Apple Watch", 349.99, "Avg"),
+               new Item("3", "Beats HeadPhones", 149.99, "Bad"));
+
+
+       when(itemService.getAllItems()).thenReturn(Flux.fromIterable(items));
+
+       Flux<Item> allItems = itemController.getAllItems();
+
+       StepVerifier.create(allItems).expectNextCount(4).verifyComplete();
+
+
+   }
+
+
+
+}
+
+
+
+
+
+
+
+
+
+
+
+
+