Implement Sign Up without Security

.gitignore

@@ -0,0 +1,36 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

README.md

@@ -0,0 +1,6 @@
+# Spring Boot && JWT Demo
+
+Spring Boot를 이용한 간단한 JWT 예시 레포지토리 
+
+# Getting Started
+

build.gradle

@@ -0,0 +1,57 @@
+plugins {
+	id 'org.springframework.boot' version '2.6.7'
+	id 'io.spring.dependency-management' version '1.0.11.RELEASE'
+	id 'java'
+}
+
+group = 'demo'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '11'
+
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	/*
+	starter
+	 */
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+
+	/*
+	Data JPA
+	 */
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+
+	/*
+	Lombok
+	 */
+    compileOnly 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok'
+
+	/*
+	H2 DB
+	 */
+	runtimeOnly 'com.h2database:h2'
+
+	/*
+	Security
+	 */
+//	implementation 'org.springframework.boot:spring-boot-starter-security'
+
+	/*
+	Validation
+	 */
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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 POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | 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" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@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 execute
+
+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 execute
+
+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
+
+: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 %*
+
+: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

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'api'

src/main/java/demo/api/ApiApplication.java

@@ -0,0 +1,19 @@
+package demo.api;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+
+@SpringBootApplication
+/**
+ * 스프링 부트의 Entry 포인트 클래스에
+ * @EnableJpaAuditing 어노테이션을 적용하여 JPA Auditing을 활성화
+ */
+@EnableJpaAuditing
+public class ApiApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ApiApplication.class, args);
+	}
+
+}

src/main/java/demo/api/AppConfig.java

@@ -0,0 +1,31 @@
+package demo.api;
+
+import demo.api.user.UserService;
+import demo.api.user.UserServiceImpl;
+import demo.api.user.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class AppConfig {
+  private final UserRepository userRepository;
+
+  public AppConfig(UserRepository userRepository) {
+    System.out.println("AppConfig");
+    System.out.println("userRepository = " + userRepository);
+    this.userRepository = userRepository;
+  }
+
+  @Bean
+  public UserService userService() {
+    System.out.println("userService");
+    return new UserServiceImpl(userRepository);
+  }
+
+//  @Bean
+//  public BCryptPasswordEncoder passwordEncoder() {
+//    System.out.println("passwordEncoder");
+//    return new BCryptPasswordEncoder();
+//  }
+}

src/main/java/demo/api/common/domain/CoreEntity.java

@@ -0,0 +1,44 @@
+package demo.api.common.domain;
+
+import java.time.LocalDate;
+import javax.persistence.Column;
+import javax.persistence.EntityListeners;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.MappedSuperclass;
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Getter @Setter
+/**
+ * JPA Entity 클래스들이 CoreEntity 추상 클래스를 상속할 경우
+ * createDate, modifiedDate를 컬럼으로 인식하도록
+ * MappedSuperclass 어노테이션을 추가
+ */
+@MappedSuperclass
+/**
+ * Spring Data JPA에서 시간에 대해서 자동으로 값을 넣어주는 기능인
+ * JPA Audit를 사용하기 위해 아래 줄을 통해
+ * CoreEntity 클래스에 Auditing 기능을 포함
+ *
+ * 그리고
+ * 스프링 부트의 Entry 포인트 클래스에
+ * @EnableJpaAuditing 어노테이션을 적용하여 JPA Auditing을 활성화
+ */
+@EntityListeners({AuditingEntityListener.class})
+public class CoreEntity {
+  @CreatedDate
+  private LocalDate createdAt;
+
+  @LastModifiedDate
+  private LocalDate updateAt;
+
+  @Id // 이 프로퍼티가 pk 역할을 한다는 것을 명시
+  @Column(name = "id") // 객체 필드와 DB 테이블 컬럼을 맵핑
+  @GeneratedValue(strategy= GenerationType.IDENTITY) // @GeneratedValue는 pk의 값을 위한 자동 생성 전략을 명시하는데 사용
+  private Long id;
+}

src/main/java/demo/api/user/UserController.java

@@ -0,0 +1,35 @@
+package demo.api.user;
+
+import demo.api.user.domain.User;
+import demo.api.user.dtos.UserSignUpRequest;
+import lombok.RequiredArgsConstructor;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * User 관련 HTTP 요청 처리
+ */
+@RestController
+@RequestMapping("/user")
+@RequiredArgsConstructor
+public class UserController {
+  private final UserService userService;
+
+  @PostMapping("/signUp")
+  public Boolean signUp(@ModelAttribute @Validated UserSignUpRequest signUpReq) throws Exception {
+    if(userService.isEmailExist(signUpReq.getEmail())) {
+      throw new Exception("Your Mail already Exist.");
+    }
+    User newUser = userService.signUp(signUpReq.toUserEntity());
+    System.out.println("newUser = " + newUser.toString());
+    if(newUser.getId() != null) {
+      System.out.println("running");
+      return true;
+    }
+    return false;
+  }
+}

src/main/java/demo/api/user/UserService.java

@@ -0,0 +1,34 @@
+package demo.api.user;
+
+import demo.api.user.domain.User;
+
+public interface UserService {
+  /**
+   * 유저의 정보로 회원가입
+   * @param user 가입할 유저의 정보
+   * @return 가입된 유저 정보
+   */
+  User signUp(User user);
+
+  /**
+   * 이메일을 통해 유저 조회
+   * @param email
+   * @return 조회된 유저
+   */
+  User findUserByEmail(String email);
+
+  /**
+   * 유저 정보 수정
+   * @param user 수정활 User Entity
+   * @param newInfo
+   * @return 수정된 User
+   */
+  User updateUser(User user, String newInfo);
+
+  /**
+   * 이메일 중복 여부를 확인
+   * @param email
+   * @return true | false
+   */
+  boolean isEmailExist(String email);
+}

src/main/java/demo/api/user/UserServiceImpl.java

@@ -0,0 +1,36 @@
+package demo.api.user;
+
+import demo.api.user.domain.User;
+import demo.api.user.repository.UserRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class UserServiceImpl implements UserService {
+//  private final BCryptPasswordEncoder passwordEncoder;
+  private final UserRepository userRepository;
+
+  @Override
+  public User signUp(User user) {
+//    user.hashPassword(passwordEncoder);
+    return userRepository.save(user);
+  }
+
+  @Override
+  public User findUserByEmail(String email) {
+    return null;
+  }
+
+  @Override
+  public User updateUser(User user, String newInfo) {
+    return null;
+  }
+
+  @Override
+  public boolean isEmailExist(String email) {
+    return false;
+  }
+}

src/main/java/demo/api/user/domain/User.java

@@ -0,0 +1,54 @@
+package demo.api.user.domain;
+
+import demo.api.common.domain.CoreEntity;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+//import org.springframework.security.crypto.password.PasswordEncoder;
+
+// @Entity 어노테이션을 클래스에 선언하면 그 클래스는 JPA가 관리
+@Entity
+@Getter @Setter
+@NoArgsConstructor
+@ToString
+public class User extends CoreEntity {
+  @Column(nullable = false, unique = true)
+  private String email;
+  @Column(nullable = false)
+  private String password;
+  @Column(length = 10, nullable = false)
+  private String name;
+
+  @Builder
+  public User(String email, String password, String name) {
+    this.email = email;
+    this.password = password;
+    this.name = name;
+  }
+
+  // https://reflectoring.io/spring-security-password-handling/
+  /**
+   * 비밀번호를 암호화
+   * @param passwordEncoder 암호화 할 인코더 클래스
+   * @return 변경된 유저 Entity
+   */
+//  public User hashPassword(PasswordEncoder passwordEncoder) {
+//    this.password = passwordEncoder.encode(this.password);
+//    return this;
+//  }
+
+  /**
+   * 비밀번호 확인
+   * @param plainPassword 암호화 이전의 비밀번호
+   * @param passwordEncoder 암호화에 사용된 클래스
+   * @return true | false
+   */
+//  public boolean checkPassword(String plainPassword, PasswordEncoder passwordEncoder) {
+//    System.out.println("checkPW");
+//    return passwordEncoder.matches(plainPassword, this.password);
+//  }
+}

src/main/java/demo/api/user/dtos/UserSignUpRequest.java

@@ -0,0 +1,32 @@
+package demo.api.user.dtos;
+
+import demo.api.user.domain.User;
+import javax.validation.constraints.Email;
+import javax.validation.constraints.NotEmpty;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter @Setter
+public class UserSignUpRequest {
+  @NotEmpty(message = "Please enter your Email")
+  @Email
+  private String email;
+  @NotEmpty(message = "Please enter your Password")
+  private String password;
+  @NotEmpty(message = "Please enter your Name")
+  private String name;
+
+  /**
+   * Transform to User Entity
+   * @return User Entity
+   */
+  public User toUserEntity() {
+    return User.builder()
+        .email(this.getEmail())
+        .password(this.getPassword())
+        .name(this.getName())
+        .build();
+  }
+}

src/main/java/demo/api/user/repository/UserRepository.java

@@ -0,0 +1,14 @@
+package demo.api.user.repository;
+
+import demo.api.user.domain.User;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+// @Repository
+public interface UserRepository extends JpaRepository<User, Long> {
+
+  Optional<User> findByEmail(String email);
+
+  boolean existsByEmail(String email);
+}

src/main/resources/application.yml

@@ -0,0 +1,18 @@
+server:
+  port: 3000
+spring:
+  datasource:
+    url: jdbc:h2:tcp://localhost/~/demoapi
+    driver-class-name: org.h2.Driver
+    username: sa
+  jpa:
+    show-sql: true
+    hibernate:
+      ddl-auto: none
+  mvc:
+    servlet:
+      load-on-startup: 1
+  security:
+    user:
+      name: test
+      password: tester

src/test/java/demo/api/ApiApplicationTests.java

@@ -0,0 +1,13 @@
+package demo.api;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class ApiApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

src/test/java/demo/api/user/service/UserServiceTest.java

@@ -0,0 +1,67 @@
+package demo.api.user.service;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+import demo.api.AppConfig;
+import demo.api.user.UserService;
+import demo.api.user.UserServiceImpl;
+import demo.api.user.domain.User;
+import demo.api.user.repository.UserRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.transaction.annotation.Transactional;
+
+@SpringBootTest
+@DisplayName("User Service Test")
+class UserServiceTest {
+  private static final String EMAIL = "test@email.com";
+  private static final String PASSWORD = "12345";
+  private static final String NAME = "김정호";
+  UserService userService;
+
+  @Autowired
+  UserRepository userRepository;
+
+  @BeforeEach
+  public void beforeEach() {
+    AppConfig appConfig = new AppConfig(userRepository);
+    userService = appConfig.userService();
+  }
+
+  @Test
+  @DisplayName("User Sign Up")
+  void signUp() {
+    User user = createUser();
+    System.out.println("user = " + user.toString());
+    User newUser = userService.signUp(user);
+
+    System.out.println("newUser = " + newUser.toString());
+    assertThat(newUser.getEmail()).isEqualTo(EMAIL);
+  }
+
+  @Test
+  void findUserByEmail() {
+  }
+
+  @Test
+  void updateUserName() {
+  }
+
+  @Test
+  void isEmailExist() {
+  }
+
+  private User createUser() {
+    return User.builder()
+        .email(EMAIL)
+        .password(PASSWORD)
+        .name(NAME)
+        .build();
+  }
+}