├── .gitignore ├── build.gradle ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle └── src └── test └── java ├── SocialNetworkingShould.java └── com └── codesai └── social_network └── business ├── actions ├── PublishMessageAction.java ├── PublishMessageCommand.java ├── ViewMessagesAction.java └── ViewMessagesCommand.java └── model ├── User.java └── UserRepository.java /.gitignore: -------------------------------------------------------------------------------- 1 | .idea/ 2 | .gradle/ 3 | build/ 4 | out/ 5 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | plugins { 2 | id 'java' 3 | } 4 | 5 | group 'org.example' 6 | version '1.0-SNAPSHOT' 7 | 8 | sourceCompatibility = 1.11 9 | 10 | repositories { 11 | mavenCentral() 12 | } 13 | 14 | test { 15 | useJUnitPlatform() 16 | } 17 | 18 | dependencies { 19 | testImplementation("org.junit.jupiter:junit-jupiter-api:5.6.0") 20 | testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.6.0") 21 | testImplementation("org.mockito:mockito-core:3.3.3") 22 | testCompile("org.assertj:assertj-core:3.15.0") 23 | } 24 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Codesai/kata-social-networking-hexagonal-architecture/cd680099c104c8e52bbaa12c63890c9b5499fc14/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Sat Mar 14 01:12:10 CET 2020 2 | distributionUrl=https\://services.gradle.org/distributions/gradle-6.2-all.zip 3 | distributionBase=GRADLE_USER_HOME 4 | distributionPath=wrapper/dists 5 | zipStorePath=wrapper/dists 6 | zipStoreBase=GRADLE_USER_HOME 7 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | # Determine the Java command to use to start the JVM. 86 | if [ -n "$JAVA_HOME" ] ; then 87 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 88 | # IBM's JDK on AIX uses strange locations for the executables 89 | JAVACMD="$JAVA_HOME/jre/sh/java" 90 | else 91 | JAVACMD="$JAVA_HOME/bin/java" 92 | fi 93 | if [ ! -x "$JAVACMD" ] ; then 94 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 95 | 96 | Please set the JAVA_HOME variable in your environment to match the 97 | location of your Java installation." 98 | fi 99 | else 100 | JAVACMD="java" 101 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 102 | 103 | Please set the JAVA_HOME variable in your environment to match the 104 | location of your Java installation." 105 | fi 106 | 107 | # Increase the maximum file descriptors if we can. 108 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 109 | MAX_FD_LIMIT=`ulimit -H -n` 110 | if [ $? -eq 0 ] ; then 111 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 112 | MAX_FD="$MAX_FD_LIMIT" 113 | fi 114 | ulimit -n $MAX_FD 115 | if [ $? -ne 0 ] ; then 116 | warn "Could not set maximum file descriptor limit: $MAX_FD" 117 | fi 118 | else 119 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 120 | fi 121 | fi 122 | 123 | # For Darwin, add options to specify how the application appears in the dock 124 | if $darwin; then 125 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 126 | fi 127 | 128 | # For Cygwin or MSYS, switch paths to Windows format before running java 129 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 130 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 131 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 132 | JAVACMD=`cygpath --unix "$JAVACMD"` 133 | 134 | # We build the pattern for arguments to be converted via cygpath 135 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 136 | SEP="" 137 | for dir in $ROOTDIRSRAW ; do 138 | ROOTDIRS="$ROOTDIRS$SEP$dir" 139 | SEP="|" 140 | done 141 | OURCYGPATTERN="(^($ROOTDIRS))" 142 | # Add a user-defined pattern to the cygpath arguments 143 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 144 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 145 | fi 146 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 147 | i=0 148 | for arg in "$@" ; do 149 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 150 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 151 | 152 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 153 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 154 | else 155 | eval `echo args$i`="\"$arg\"" 156 | fi 157 | i=`expr $i + 1` 158 | done 159 | case $i in 160 | 0) set -- ;; 161 | 1) set -- "$args0" ;; 162 | 2) set -- "$args0" "$args1" ;; 163 | 3) set -- "$args0" "$args1" "$args2" ;; 164 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;; 165 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 166 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 167 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 168 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 169 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 170 | esac 171 | fi 172 | 173 | # Escape application args 174 | save () { 175 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 176 | echo " " 177 | } 178 | APP_ARGS=`save "$@"` 179 | 180 | # Collect all arguments for the java command, following the shell quoting and substitution rules 181 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 182 | 183 | exec "$JAVACMD" "$@" 184 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto init 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto init 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :init 68 | @rem Get command-line arguments, handling Windows variants 69 | 70 | if not "%OS%" == "Windows_NT" goto win9xME_args 71 | 72 | :win9xME_args 73 | @rem Slurp the command line arguments. 74 | set CMD_LINE_ARGS= 75 | set _SKIP=2 76 | 77 | :win9xME_args_slurp 78 | if "x%~1" == "x" goto execute 79 | 80 | set CMD_LINE_ARGS=%* 81 | 82 | :execute 83 | @rem Setup the command line 84 | 85 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 86 | 87 | @rem Execute Gradle 88 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 89 | 90 | :end 91 | @rem End local scope for the variables with windows NT shell 92 | if "%ERRORLEVEL%"=="0" goto mainEnd 93 | 94 | :fail 95 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 96 | rem the _cmd.exe /c_ return code! 97 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 98 | exit /b 1 99 | 100 | :mainEnd 101 | if "%OS%"=="Windows_NT" endlocal 102 | 103 | :omega 104 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | rootProject.name = 'kata-social-networking' 2 | 3 | -------------------------------------------------------------------------------- /src/test/java/SocialNetworkingShould.java: -------------------------------------------------------------------------------- 1 | import com.codesai.social_network.business.actions.PublishMessageAction; 2 | import com.codesai.social_network.business.actions.PublishMessageCommand; 3 | import com.codesai.social_network.business.actions.ViewMessagesAction; 4 | import com.codesai.social_network.business.actions.ViewMessagesCommand; 5 | import com.codesai.social_network.business.model.User; 6 | import com.codesai.social_network.business.model.UserRepository; 7 | import org.junit.jupiter.api.Test; 8 | import org.mockito.ArgumentCaptor; 9 | 10 | import static java.util.Collections.singletonList; 11 | import static org.assertj.core.api.Assertions.assertThat; 12 | import static org.mockito.Mockito.*; 13 | 14 | /* 15 | - Following: 16 | - Charlie can subscribe to Alice’s and Bob’s timelines, and view an aggregated list of all subscriptions 17 | */ 18 | 19 | public class SocialNetworkingShould { 20 | 21 | public static final String ALICE_ID = "aliceId"; 22 | public static final String ANY_MESSAGE = "Welcome to our first twitch stream!"; 23 | private static final String ALFREDO_ID = "alfredoId"; 24 | private static final String MIGUEL_ID = "miguelId"; 25 | private UserRepository userRepository = mock(UserRepository.class); 26 | private ArgumentCaptor captor = ArgumentCaptor.forClass(User.class); 27 | 28 | @Test 29 | public void 30 | a_user_can_publish_a_message() { 31 | var user = new User(ALICE_ID); 32 | when(userRepository.retrieveById(ALICE_ID)).thenReturn(user); 33 | 34 | new PublishMessageAction(userRepository).execute(new PublishMessageCommand(ALICE_ID, ANY_MESSAGE)); 35 | 36 | verify(userRepository).save(this.captor.capture()); 37 | assertThat(this.captor.getValue().messages).containsExactly(ANY_MESSAGE); 38 | } 39 | @Test 40 | public void 41 | a_user_can_read_the_messages_of_another_user() { 42 | var userWithMessages = new User(ALFREDO_ID); 43 | userWithMessages.publishMessage(ANY_MESSAGE); 44 | var reader = new User(ALICE_ID); 45 | when(userRepository.retrieveById(ALFREDO_ID)).thenReturn(userWithMessages); 46 | when(userRepository.retrieveById(ALICE_ID)).thenReturn(reader); 47 | 48 | var messages = new ViewMessagesAction(userRepository).execute(new ViewMessagesCommand(ALICE_ID, ALFREDO_ID)); 49 | 50 | assertThat(messages).containsExactly(ANY_MESSAGE); 51 | } 52 | @Test 53 | public void 54 | a_user_cannot_read_the_messages_of_another_user_when_they_are_blocked() { 55 | var reader = new User(MIGUEL_ID); 56 | var userWithMessages = new User(ALFREDO_ID, singletonList(reader)); 57 | 58 | userWithMessages.publishMessage(ANY_MESSAGE); 59 | when(userRepository.retrieveById(ALFREDO_ID)).thenReturn(userWithMessages); 60 | when(userRepository.retrieveById(MIGUEL_ID)).thenReturn(reader); 61 | 62 | var messages = new ViewMessagesAction(userRepository).execute(new ViewMessagesCommand(MIGUEL_ID, ALFREDO_ID)); 63 | 64 | assertThat(messages).isEmpty(); 65 | } 66 | } 67 | -------------------------------------------------------------------------------- /src/test/java/com/codesai/social_network/business/actions/PublishMessageAction.java: -------------------------------------------------------------------------------- 1 | package com.codesai.social_network.business.actions; 2 | 3 | import com.codesai.social_network.business.model.UserRepository; 4 | 5 | public class PublishMessageAction { 6 | private final UserRepository repository; 7 | 8 | public PublishMessageAction(UserRepository repository) { 9 | this.repository = repository; 10 | } 11 | 12 | public void execute(PublishMessageCommand command) { 13 | var user = this.repository.retrieveById(command.userId); 14 | user.publishMessage(command.message); 15 | this.repository.save(user); 16 | } 17 | } 18 | -------------------------------------------------------------------------------- /src/test/java/com/codesai/social_network/business/actions/PublishMessageCommand.java: -------------------------------------------------------------------------------- 1 | package com.codesai.social_network.business.actions; 2 | 3 | public class PublishMessageCommand { 4 | final String userId; 5 | final String message; 6 | 7 | public PublishMessageCommand(String userId, String message) { 8 | this.userId = userId; 9 | this.message = message; 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /src/test/java/com/codesai/social_network/business/actions/ViewMessagesAction.java: -------------------------------------------------------------------------------- 1 | package com.codesai.social_network.business.actions; 2 | 3 | import com.codesai.social_network.business.model.UserRepository; 4 | 5 | import java.util.List; 6 | 7 | public class ViewMessagesAction { 8 | private final UserRepository repository; 9 | 10 | public ViewMessagesAction(UserRepository repository) { 11 | this.repository = repository; 12 | } 13 | 14 | public List execute(ViewMessagesCommand command) { 15 | var userWithMessages = repository.retrieveById(command.userWithMessagesToRead); 16 | var reader = repository.retrieveById(command.readerId); 17 | 18 | return userWithMessages.askToReadBy(reader); 19 | } 20 | } 21 | -------------------------------------------------------------------------------- /src/test/java/com/codesai/social_network/business/actions/ViewMessagesCommand.java: -------------------------------------------------------------------------------- 1 | package com.codesai.social_network.business.actions; 2 | 3 | public class ViewMessagesCommand { 4 | final String readerId; 5 | final String userWithMessagesToRead; 6 | 7 | public ViewMessagesCommand(String readerId, String userWithMessagesToRead) { 8 | this.readerId = readerId; 9 | this.userWithMessagesToRead = userWithMessagesToRead; 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /src/test/java/com/codesai/social_network/business/model/User.java: -------------------------------------------------------------------------------- 1 | package com.codesai.social_network.business.model; 2 | 3 | import java.util.ArrayList; 4 | import java.util.Collections; 5 | import java.util.List; 6 | 7 | import static java.util.Collections.emptyList; 8 | 9 | public class User { 10 | public final String id; 11 | private final List blockedUsers; 12 | public List messages = new ArrayList<>(); 13 | 14 | public User(String id) { 15 | this.id = id; 16 | this.blockedUsers = emptyList(); 17 | } 18 | 19 | public User(String id, List blockedUsers) { 20 | this.id = id; 21 | this.blockedUsers = blockedUsers; 22 | } 23 | 24 | public void publishMessage(String message) { 25 | this.messages.add(message); 26 | } 27 | 28 | public List askToReadBy(User reader) { 29 | if (blockedUsers.stream().anyMatch(user -> user.id.equals(reader.id))) return emptyList(); 30 | return messages; 31 | } 32 | } 33 | -------------------------------------------------------------------------------- /src/test/java/com/codesai/social_network/business/model/UserRepository.java: -------------------------------------------------------------------------------- 1 | package com.codesai.social_network.business.model; 2 | 3 | public interface UserRepository { 4 | void save(User user); 5 | 6 | User retrieveById(String id); 7 | } 8 | --------------------------------------------------------------------------------