Add long classpath case to the test plan (#536)

Signed-off-by: Jinbo Wang <jinbwan@microsoft.com>

Author: testforstephen

TestPlan.md

@@ -473,3 +473,19 @@ Exception in thread "main" java.lang.IllegalStateException
 4. Press F5 to verify the variables should be like this:
 
     ![args](images/args.PNG)
+
+## Classpath shortener for long classpath project
+1. Open `longclasspath` project in VS Code.
+2. Append the following config to the launch.json:
+```
+  "shortenCommandLine": "none"
+```
+3. Click Run or Debug CodeLens.
+  - On Windows, it should pop up an error box saying "CreateProcess error"=206, The filename or extension is too long".
+  - On Linux and Macos, it may succeed.
+4. On Windows/Linux/Macos, modify the launch.json with the following combinations. Click Run/Debug both should succeed.
+```
+  "shortenCommandLine": ""/"auto"/"jarmanifest"/"argfile", // argfile requires your Java version is 9 and higher.
+  "console": ""/"internalConsole"/"integratedTerminal"/"externalTerminal"
+
+```

testprojects/longclasspath/.gitignore

@@ -0,0 +1,27 @@
+HELP.md
+.gradle
+/build/
+!gradle/wrapper/gradle-wrapper.jar
+
+### 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/

testprojects/longclasspath/build.gradle

@@ -0,0 +1,27 @@
+plugins {
+	id 'org.springframework.boot' version '2.1.3.RELEASE'
+	id 'java'
+}
+
+apply plugin: 'io.spring.dependency-management'
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '1.8'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	compile("org.springframework.boot:spring-boot-starter-data-mongodb")
+	compile('org.springframework.boot:spring-boot-starter-web')
+	compile('org.apache.spark:spark-core_2.11:2.3.2')
+	compile('org.apache.spark:spark-sql_2.11:2.3.2')
+	// compile('org.mongodb.spark:mongo-spark-connector_2.11:2.3.1')
+	testImplementation('org.springframework.boot:spring-boot-starter-test')
+}
+
+configurations.all {
+    exclude module: 'slf4j-log4j12'
+}

testprojects/longclasspath/gradle/wrapper/gradle-wrapper.jar

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

testprojects/longclasspath/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+pluginManagement {
+	repositories {
+		gradlePluginPortal()
+	}
+}
+rootProject.name = 'longclasspath'

testprojects/longclasspath/gradlew

@@ -0,0 +1,13 @@
+package com.example.longclasspath;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class DemoApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(DemoApplication.class, args);
+	}
+
+}

testprojects/longclasspath/gradlew.bat

@@ -0,0 +1 @@
+