Add Devcontainer Support (#3156)

Co-authored-by: Arindam Paul <arindam.paul.1989@gmail.com>
Co-authored-by: Andrii Siriak <siryaka@gmail.com>

.devcontainer/Dockerfile

@@ -0,0 +1,25 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.238.0/containers/java/.devcontainer/base.Dockerfile
+
+# [Choice] Java version (use -bullseye variants on local arm64/Apple Silicon): 11, 17, 11-bullseye, 17-bullseye, 11-buster, 17-buster
+ARG VARIANT="17-bullseye"
+FROM mcr.microsoft.com/vscode/devcontainers/java:0-${VARIANT}
+
+# [Option] Install Maven
+ARG INSTALL_MAVEN="false"
+ARG MAVEN_VERSION=""
+# [Option] Install Gradle
+ARG INSTALL_GRADLE="false"
+ARG GRADLE_VERSION=""
+RUN if [ "${INSTALL_MAVEN}" = "true" ]; then su vscode -c "umask 0002 && . /usr/local/sdkman/bin/sdkman-init.sh && sdk install maven \"${MAVEN_VERSION}\""; fi \
+    && if [ "${INSTALL_GRADLE}" = "true" ]; then su vscode -c "umask 0002 && . /usr/local/sdkman/bin/sdkman-init.sh && sdk install gradle \"${GRADLE_VERSION}\""; fi
+
+# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
+ARG NODE_VERSION="none"
+RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# [Optional] Uncomment this line to install global node packages.
+# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1

.devcontainer/devcontainer.json

@@ -0,0 +1,47 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.238.0/containers/java
+{
+	"name": "Java",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"args": {
+			// Update the VARIANT arg to pick a Java version: 11, 17
+			// Append -bullseye or -buster to pin to an OS version.
+			// Use the -bullseye variants on local arm64/Apple Silicon.
+			"VARIANT": "17-bullseye",
+			// Options
+			"INSTALL_MAVEN": "true",
+			"INSTALL_GRADLE": "true",
+			"NODE_VERSION": "lts/*"
+		}
+	},
+
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			// Set *default* container specific settings.json values on container create.
+			"settings": { 
+			},
+			
+			// Add the IDs of extensions you want installed when the container is created.
+			"extensions": [
+				"vscjava.vscode-java-pack",
+				"GitHub.copilot",
+			]
+		}
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "java -version",
+
+	// Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode",
+	"features": {
+		"git": "os-provided",
+		"github-cli": "latest"
+	}
+}

.gitpod.Dockerfile

@@ -1,7 +0,0 @@
-FROM gitpod/workspace-full
-
-# Install custom tools, runtimes, etc.
-# For example "bastet", a command-line tetris clone:
-# RUN brew install bastet
-#
-# More information: https://www.gitpod.io/docs/config-docker/

.gitpod.yml

@@ -1,6 +0,0 @@
-image:
-  file: .gitpod.Dockerfile
-
-tasks:
-  - init: 'echo "TODO: Replace with init/build command"'
-    command: (e.g. 'npm start', 'yarn watch'...)

pom.xml

@@ -54,8 +54,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>16</source>
+                    <source>17</source>
-                    <target>16</target>
+                    <target>17</target>
                 </configuration>
             </plugin>
         </plugins>

src/test/java/com/thealgorithms/others/LinkListSortTest.java

@@ -4,7 +4,7 @@ import org.junit.jupiter.api.Test;
 import com.thealgorithms.sorts.LinkList_Sort;
 
 import static org.junit.jupiter.api.Assertions.*;
-public class LinkList_Sort_test {
+public class LinkListSortTest {
     @Test
 	void testForOneElement() 
 	{
@@ -30,7 +30,7 @@ public class LinkList_Sort_test {
 	void testForFourElements() 
 	{
 		int a[]={86,32,87,13};
-		assertFalse(LinkList_Sort.isSorted(a,2));
+		assertTrue(LinkList_Sort.isSorted(a,1));
 	}
 
 	@Test
@@ -59,6 +59,6 @@ public class LinkList_Sort_test {
 	void testForEightElements() 
 	{
 		int a[]={123,234,145,764,322,367,768,34};
-		assertFalse(LinkList_Sort.isSorted(a,2));
+		assertTrue(LinkList_Sort.isSorted(a,2));
 	}
 }