Add test on download and install lib on usage.

Both test that when user does not wnat to download install Sloeber does
not do it and the reverse.

io.sloeber.core/src/io/sloeber/arduinoFramework/internal/ArduinoLibraryVersion.java

@@ -67,7 +67,7 @@ public ArduinoLibraryVersion(JsonElement json, ArduinoLibrary arduinoLibrary) {
 			archiveFileName = getSafeString(jsonObject, "archiveFileName");
 			size = jsonObject.get("size").getAsInt();
 			checksum = getSafeString(jsonObject, "checksum");
-			calculateFQN();
+			myFQN=calculateFQN(getName());
 		} catch (Exception e) {
 			throw new JsonParseException("failed to parse json  " + e.getMessage(),e);
 		}
@@ -205,9 +205,8 @@ public IPath getExamplePath() {
 		return getInstallPath().append(EXAMPLES_FOLDER);
 	}
 
-	private void calculateFQN() {
-		myFQN=  Path.fromPortableString(SLOEBER_LIBRARY_FQN);
-		myFQN=myFQN.append(MANAGED).append(getName());
+	static public IPath calculateFQN(String libName) {
+		return  Path.fromPortableString(SLOEBER_LIBRARY_FQN).append(MANAGED).append(libName);
 	}
 
 	@Override

io.sloeber.tests/src/io/sloeber/core/BuildTests.java

@@ -31,6 +31,7 @@
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.NullProgressMonitor;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
@@ -792,4 +793,43 @@ public void NightlyBoardPatron(String name, MCUBoard boardID, Example example, C
 
     }
 
+    @Test
+    public void onlyInstallLibraryWhenAllowed() throws Exception {
+    	String libName="SD";
+
+        //set option not to install lib
+    	ConfigurationPreferences.setInstallLibraries(false);
+
+        //uninstall lib
+    	LibraryManager.uninstallLibrary( libName);
+
+    	// create a project that uses a the lib
+        String testName = "onlyInstallLibraryWhenAllowed";
+        IProgressMonitor  monitor=new NullProgressMonitor();
+        IPath templateFolder = Shared.getTemplateFolder(testName);
+        CodeDescription codeDescriptor = CodeDescription.createCustomTemplate(templateFolder);
+        MCUBoard unoboard = Arduino.uno();
+        IProject theTestProject = SloeberProject.createArduinoProject(testName, null, unoboard.getBoardDescriptor(), codeDescriptor,
+        		 new CompileDescription(), monitor);
+        //wait for indexer and so on
+		Shared.waitForAllJobsToFinish();
+
+
+        //Building the project should fail
+		assertNotNull( Shared.buildAndVerify(theTestProject,3,IncrementalProjectBuilder.FULL_BUILD ,monitor),"Sloeber wrongly installed lib "+libName);
+
+        //set option to install libs
+		ConfigurationPreferences.setInstallLibraries(true);
+
+		//trigger the indexer
+		ICProject cTestProject = CoreModel.getDefault().getCModel().getCProject(theTestProject.getName());
+		CCorePlugin.getIndexManager().reindex(cTestProject);
+		Shared.waitForIndexer(theTestProject);
+
+        //build should not fail
+		assertNull( Shared.buildAndVerify(theTestProject,3,IncrementalProjectBuilder.FULL_BUILD ,monitor),"Sloeber dit not install lib "+libName);
+
+
+
+    }
 }

io.sloeber.tests/src/io/sloeber/core/Shared.java

@@ -31,6 +31,7 @@
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.FileLocator;
 import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Platform;
@@ -259,23 +260,9 @@ public static String buildAndVerifyGivenBuilders(String projectName, BoardDescri
 			autoDesc.setBuilder(curBuilder);
 			coreModel.setProjectDescription(theTestProject, projectDescription);
 
-			theTestProject.build(IncrementalProjectBuilder.FULL_BUILD, monitor);
-
-			if (hasBuildErrors(theTestProject)!=null) {
-				Shared.waitForAllJobsToFinish();
-				Thread.sleep(2000);
-				theTestProject.build(IncrementalProjectBuilder.FULL_BUILD, monitor);
-				if (hasBuildErrors(theTestProject)!=null) {
-					Shared.waitForAllJobsToFinish();
-					Thread.sleep(2000);
-					theTestProject.build(IncrementalProjectBuilder.FULL_BUILD, monitor);
-					String buildError=hasBuildErrors(theTestProject);
-					if (buildError!=null) {
-						myLastFailMessage = myLastFailMessage + NEWLINE +buildError+ NEWLINE+ "Failed to compile the project:" + projectName
-								+ " with builder " + curBuilder;
-					}
-				}
-			}
+			buildAndVerify(theTestProject,3,IncrementalProjectBuilder.FULL_BUILD, monitor);
+
+
 
 		}
 		if (!myLastFailMessage.isBlank()) {
@@ -295,6 +282,26 @@ public static String buildAndVerifyGivenBuilders(String projectName, BoardDescri
 		return null;
 	}
 
+	static String buildAndVerify(IProject theTestProject, int maxTries, int buildType, IProgressMonitor monitor) throws Exception {
+		int curTry = 0;
+		String buildError=null;
+		while (curTry++ < maxTries) {
+			theTestProject.build(buildType, monitor);
+			Shared.waitForAllJobsToFinish();
+			Thread.sleep(2000);
+			buildError = hasBuildErrors(theTestProject);
+			if (buildError == null) {
+				return buildError;
+			}
+		}
+		IAutoBuildConfigurationDescription autoDesc = IAutoBuildConfigurationDescription
+				.getActiveConfig(theTestProject,false);
+		String builder=autoDesc.getBuilder().getId();
+		myLastFailMessage = myLastFailMessage + NEWLINE + buildError + NEWLINE + "Failed to compile the project:"
+				+ theTestProject.getName() + " with builder " + builder;
+		return buildError;
+	}
+
 	/*
 	 * For some boards that do not run out of the box we know how to fix it. This
 	 * code fixes these things

io.sloeber.tests/src/templates/onlyInstallLibraryWhenAllowed/sketch.ino

@@ -0,0 +1,14 @@
+#include "Arduino.h"
+#include "SD.h"
+//The setup function is called once at startup of the sketch
+void setup()
+{
+// Add your initialization code here
+}
+
+// The loop function is called in an endless loop
+void loop()
+{
+//Add your repeated code here
+}
+