[maven] Use the "test" classpath within sarl-maven-plugin.

Within the implementation of the sarl-maven-plugin, the classpath that
was used for compiling the test code is the same as the classpath for
compiling the regular code. The specific classpath for test stage is
used for compiling the test code by the sarl-maven-plugin.

close #839

Signed-off-by: Stéphane Galland <galland@arakhne.org>

main/internalmaven/sarl-maven-plugin/src/main/java/io/sarl/maven/compiler/AbstractSarlBatchCompilerMojo.java

@@ -351,10 +351,11 @@ protected String readSarlEclipseSetting(String sourceDirectory) {
 		return null;
 	}
 
-	/** Replies the current classpath.
+	/** Replies the classpath for the standard code.
 	 *
 	 * @return the current classpath.
 	 * @throws MojoExecutionException on failure.
+	 * @see #getTestClassPath()
 	 */
 	protected List<File> getClassPath() throws MojoExecutionException {
 		final Set<String> classPath = new LinkedHashSet<>();
@@ -381,4 +382,35 @@ protected List<File> getClassPath() throws MojoExecutionException {
 		return files;
 	}
 
+	/** Replies the classpath for the test code.
+	 *
+	 * @return the current classpath.
+	 * @throws MojoExecutionException on failure.
+	 * @since 0.8
+	 * @see #getClassPath()
+	 */
+	protected List<File> getTestClassPath() throws MojoExecutionException {
+		final Set<String> classPath = new LinkedHashSet<>();
+		final MavenProject project = getProject();
+		classPath.add(project.getBuild().getTestSourceDirectory());
+		try {
+			classPath.addAll(project.getTestClasspathElements());
+		} catch (DependencyResolutionRequiredException e) {
+			throw new MojoExecutionException(e.getLocalizedMessage(), e);
+		}
+		for (final Artifact dep : project.getArtifacts()) {
+			classPath.add(dep.getFile().getAbsolutePath());
+		}
+		final List<File> files = new ArrayList<>();
+		for (final String filename : classPath) {
+			final File file = new File(filename);
+			if (file.exists()) {
+				files.add(file);
+			} else {
+				getLog().warn(MessageFormat.format(Messages.AbstractSarlBatchCompilerMojo_10, filename));
+			}
+		}
+		return files;
+	}
+
 }

main/internalmaven/sarl-maven-plugin/src/main/java/io/sarl/maven/compiler/TestCompileMojo.java

@@ -74,7 +74,7 @@ protected void compileSARL() throws MojoExecutionException, MojoFailureException
 				compileSourceRoots.add(file);
 			}
 		}
-		final List<File> classPath = getClassPath();
+		final List<File> classPath = getTestClassPath();
 		project.addTestCompileSourceRoot(outputDirectory.getAbsolutePath());
 		compile(classPath, compileSourceRoots, outputDirectory,
 				makeAbsolute(new File(getProject().getBuild().getTestOutputDirectory())));