Format build.gradle and add dependency for JUnit tests

build.gradle

@@ -1,3 +1,5 @@
+import org.gradle.plugins.ide.eclipse.model.SourceFolder
+
 /*
  * This file was generated by the Gradle 'init' task.
  *
@@ -8,7 +10,7 @@
 
 buildscript {
     repositories {
-        maven { url "https://plugins.gradle.org/m2/" }
+        maven { url 'https://plugins.gradle.org/m2/' }
     }
     dependencies {
         classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.18'
@@ -16,40 +18,41 @@ buildscript {
 }
 
 plugins {
-    // Apply the application plugin to add support for building a CLI application
+    id 'java' // Apply the java plugin to add support for Java
-    id 'application'
+    id 'java-library' // Apply the java-library plugin for API and implementation separation.
+    id 'application' // Apply the application plugin to add support for building a CLI application
+    id 'com.google.protobuf' version '0.8.18' // Apply the protobuf auto generator
+    id 'com.diffplug.spotless' version '6.11.0' // Apply the Spotless linter plugin.
 
-    // Apply the java plugin to add support for Java
+    id 'eclipse' // Eclipse Support
-    id 'java'
+    id 'idea' // IntelliJ Support
 
-    // Apply the protobuf auto generator
+    id 'maven-publish' // Support for publishing to Maven repositories.
-    id 'com.google.protobuf' version "0.8.18"
+    id 'signing' // Support for signing build artifacts.
 
-    // Eclipse Support
+    id 'io.freefair.lombok' version '6.6.1' // Lombok for delombok'ification
-    id 'eclipse'
-
-    // IntelliJ Support
-    id 'idea'
-
-    // Maven
-    id 'maven-publish'
-    id 'signing'
-
-    // Lombok for delombok'ification
-    id "io.freefair.lombok" version "6.6.1"
 }
 
-compileJava.options.encoding = "UTF-8"
+spotless {
-compileTestJava.options.encoding = "UTF-8"
+    java {
+        importOrder('io.grasscutter', '', 'java', 'javax', '\\#java', '\\#') // Configure import order.
+        googleJavaFormat('1.15.0') // Use Google's Java formatter.
+            .reflowLongStrings() // Reflow long strings.
+        formatAnnotations() // Reformat annotations.
+        endWithNewline() // Ensure files end with a newline.
+        indentWithTabs(2); indentWithSpaces(4) // Use 4 spaces for indentation.
+        toggleOffOn() // Toggle off/on.
+    }
+}
+
+compileJava.options.encoding = 'UTF-8'
+compileTestJava.options.encoding = 'UTF-8'
 
 sourceCompatibility = JavaVersion.VERSION_17
 targetCompatibility = JavaVersion.VERSION_17
 
-group = 'xyz.grasscutters'
+group = 'io.grasscutter'
-version = '1.4.7'
+version = '2.0.0-unstable'
-
-sourceCompatibility = 17
-targetCompatibility = 17
 
 java {
     withJavadocJar()
@@ -61,53 +64,77 @@ repositories {
 }
 
 dependencies {
+    // Additional JAR libraries.
     implementation fileTree(dir: 'lib', include: ['*.jar'])
 
     implementation group: 'it.unimi.dsi', name: 'fastutil', version: '8.5.8'
 
+    // Logging libraries.
     implementation group: 'org.slf4j', name: 'slf4j-api', version: '1.7.36'
     implementation group: 'ch.qos.logback', name: 'logback-core', version: '1.2.11'
     implementation group: 'ch.qos.logback', name: 'logback-classic', version: '1.2.11'
 
+    // Line reading libraries.
     implementation group: 'org.jline', name: 'jline', version: '3.21.0'
     implementation group: 'org.jline', name: 'jline-terminal-jna', version: '3.21.0'
     implementation group: 'net.java.dev.jna', name: 'jna', version: '5.10.0'
 
+    // Java Netty for networking.
     implementation group: 'io.netty', name: 'netty-common', version: '4.1.79.Final'
     implementation group: 'io.netty', name: 'netty-handler', version: '4.1.79.Final'
     implementation group: 'io.netty', name: 'netty-transport-native-epoll', version: '4.1.79.Final'
     implementation group: 'io.netty', name: 'netty-transport-native-kqueue', version: '4.1.79.Final'
 
+    // Serialization.
     implementation group: 'com.google.code.gson', name: 'gson', version: '2.9.0'
-    implementation group: 'com.google.protobuf', name: 'protobuf-java', version: '3.18.2'
+    implementation group: 'com.google.protobuf', name: 'protobuf-java', version: '3.19.6'
 
+    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.14.2'
+    implementation platform('com.fasterxml.jackson:jackson-bom:2.14.0')
+    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.14.2'
+
+    // Reflections libraries.
     implementation group: 'org.reflections', name: 'reflections', version: '0.10.2'
-
-    implementation group: 'dev.morphia.morphia', name: 'morphia-core', version: '2.2.7'
-
-    implementation group: 'org.greenrobot', name: 'eventbus-java', version: '3.3.1'
-    //implementation group: 'org.danilopianini', name: 'java-quadtree', version: '0.1.9'
-
-    implementation group: 'org.quartz-scheduler', name: 'quartz', version: '2.3.2'
-    implementation group: 'org.quartz-scheduler', name: 'quartz-jobs', version: '2.3.2'
-
-    implementation group: 'org.luaj', name: 'luaj-jse', version: '3.0.1'
-
     implementation group: 'com.esotericsoftware', name: 'reflectasm', version: '1.11.9'
     implementation group: 'com.github.davidmoten', name: 'rtree-multi', version: '0.1'
 
-    implementation group: 'io.javalin', name: 'javalin', version: '4.6.4'
+    // MongoDB object mapper.
-    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.13.3'
+    implementation group: 'dev.morphia.morphia', name: 'morphia-core', version: '2.2.7'
 
+    // Utility libraries.
+    implementation group: 'org.greenrobot', name: 'eventbus-java', version: '3.3.1'
+    // implementation group: 'org.danilopianini', name: 'java-quadtree', version: '0.1.9'
+
+    // Long-term scheduler.
+    implementation group: 'org.quartz-scheduler', name: 'quartz', version: '2.3.2'
+    implementation group: 'org.quartz-scheduler', name: 'quartz-jobs', version: '2.3.2'
+
+    // Lua script engine library.
+    implementation group: 'org.luaj', name: 'luaj-jse', version: '3.0.1'
+
+    // Java HTTP server library.
+    implementation group: 'io.javalin', name: 'javalin', version: '4.6.4'
+
+    // Google Protocol Buffer definitions.
+    // These are the raw '.proto' files.
     protobuf files('proto/')
 
-    compileOnly 'org.projectlombok:lombok:1.18.24'
+    // Testing libraries.
-    annotationProcessor 'org.projectlombok:lombok:1.18.24'
+    testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.8.2'
-    testCompileOnly 'org.projectlombok:lombok:1.18.24'
+    testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-params', version: '5.8.2'
-    testAnnotationProcessor 'org.projectlombok:lombok:1.18.24'
+    testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: '5.8.2'
+
+    // HTTP client library for testing.
+    testImplementation group: 'com.squareup.okhttp3', name: 'okhttp', version: '4.10.0'
+
+    // Lombok.
+    compileOnly group: 'org.projectlombok', name: 'lombok', version: '1.18.26'
+    annotationProcessor group: 'org.projectlombok', name: 'lombok', version: '1.18.26'
+    testCompileOnly group: 'org.projectlombok', name: 'lombok', version: '1.18.26'
+    testAnnotationProcessor group: 'org.projectlombok', name: 'lombok', version: '1.18.26'
 }
 
-configurations.all {
+configurations.configureEach {
     exclude group: 'org.slf4j', module: 'slf4j'
 }
 
@@ -129,7 +156,9 @@ jar {
     }
 
     from {
-        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
+        configurations.runtimeClasspath.collect {
+            it.isDirectory() ? it : zipTree(it)
+        }
     }
 
     duplicatesStrategy = DuplicatesStrategy.INCLUDE
@@ -138,7 +167,7 @@ jar {
         include '*.xml'
     }
 
-    destinationDirectory = file(".")
+    destinationDirectory = file('.')
 }
 
 publishing {
@@ -154,6 +183,7 @@ publishing {
                     fromResolutionResult()
                 }
             }
+
             pom {
                 name = 'Grasscutter'
                 description = 'A server software reimplementation for an anime game.'
@@ -179,10 +209,15 @@ publishing {
             }
         }
     }
+
     repositories {
         maven {
             if (version.endsWith('-dev')) {
-                println("Publishing to 4benj-maven")
+                // Check if the action being ran is 'publish'.
+                if (project.hasProperty('publish')) {
+                    println('Publishing to Ben4J-Maven')
+                }
+
                 url 'https://repo.4benj.com/releases'
                 name '4benj-maven'
                 credentials {
@@ -190,7 +225,11 @@ publishing {
                     password System.getenv('benj_maven_token')
                 }
             } else {
-                println("Publishing to sonatype")
+                // Check if the action being ran is 'publish'.
+                if (project.hasProperty('publish')) {
+                    println('Publishing to Sonatype')
+                }
+
                 def releasesRepoUrl = 'https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/'
                 def snapshotsRepoUrl = 'https://s01.oss.sonatype.org/content/repositories/snapshots/'
                 url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl
@@ -232,13 +271,14 @@ idea {
         // proto files and generated Java files are automatically added as
         // source dirs.
         // If you have additional sources, add them here:
-        sourceDirs += file("/proto/");
+        sourceDirs += file('/proto/');
     }
 }
 
 eclipse {
     classpath {
-        file.whenMerged { cp -> cp.entries.add(new org.gradle.plugins.ide.eclipse.model.SourceFolder('src/generated/main/java', null))
+        file.whenMerged {
+            cp -> cp.entries.add(new SourceFolder('src/generated/main/java', null))
         }
     }
 }
@@ -254,39 +294,39 @@ javadoc {
     if (JavaVersion.current().isJava9Compatible()) {
         options.addBooleanOption('html5', true)
     }
+
     // Add this to avoid warning caused by lack of comments in proto generated java files
     options.addStringOption('Xdoclint:none', '-quiet')
     exclude '**/*.md'
 }
 
-task injectGitHash {
+tasks.register('injectGitHash') {
     def gitCommitHash = {
         try {
             return 'git rev-parse --verify --short HEAD'.execute().text.trim()
         } catch (ignored) {
-            return "GIT_NOT_FOUND"
+            return 'GIT_NOT_FOUND'
         }
     }
 
-    new File(projectDir, "src/main/java/emu/grasscutter/BuildConfig.java").text = """package emu.grasscutter;
+    new File(projectDir, 'src/main/java/emu/grasscutter/BuildConfig.java').text = """package emu.grasscutter;
 
 public final class BuildConfig {
     public static final String VERSION = \"${version}\";
     public static final String GIT_HASH = \"${gitCommitHash()}\";
 }"""
-
 }
 
 processResources {
-    dependsOn "generateProto"
+    dependsOn 'generateProto'
 }
 
 sourcesJar {
-    dependsOn "generateProto"
+    dependsOn 'generateProto'
 }
 
 delombok {
-    dependsOn "generateProto"
+    dependsOn 'generateProto'
 }
 
 // For terminal interacting in IDEA running