Added test for getting maven source directory from ancestors

src/test/java/spoon/support/compiler/SpoonPomTest.java

@@ -7,6 +7,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Paths;
 
 import static org.junit.Assert.*;
 
@@ -30,4 +31,21 @@ public void checkVersion(String path, int expected) throws IOException, XmlPullP
 		//contract: Java version is read accurately from pom and does not trigger exceptions
 		assertEquals(expected, version);
 	}
+
+	@Test
+	public void getSourceDirectory() throws IOException, XmlPullParserException {
+		checkSourceDirectory(
+			"src/test/resources/maven-launcher/hierarchy",
+			Paths.get("src/test/resources/maven-launcher/hierarchy/child/src").toAbsolutePath().toString()
+		);
+	}
+
+	public void checkSourceDirectory(String path, String expected) throws IOException, XmlPullParserException {
+		SpoonPom pomModel = new SpoonPom(path, null, MavenLauncher.SOURCE_TYPE.APP_SOURCE, new StandardEnvironment());
+
+		SpoonPom childModel = pomModel.getModules().get(0);
+		//contract: source directory is derived from parent pom.xml if not declared in the current
+		// (childModel) SpoonPom
+		assertEquals(expected, childModel.getSourceDirectories().get(0).getAbsolutePath(), expected);
+	}
 }

src/test/resources/maven-launcher/hierarchy/child/pom.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>sample.text</groupId>
+        <artifactId>parent</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>..</relativePath>
+    </parent>
+    <groupId>sample.text</groupId>
+    <artifactId>child</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <packaging>jar</packaging>
+</project>

src/test/resources/maven-launcher/hierarchy/pom.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>sample.text</groupId>
+        <artifactId>project</artifactId>
+        <version>2.2.2.RELEASE</version>
+        <relativePath/>
+    </parent>
+    <groupId>sample.text</groupId>
+    <artifactId>parent</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>child</module>
+    </modules>
+
+    <build>
+        <sourceDirectory>${project.basedir}/src</sourceDirectory>
+    </build>
+</project>