messing with poms to get test generation in there. it doesn't seem to compiled and properly though. mvn compile works but mvn install doesn't finished compiling generated tests.

antlr4-testgen-maven-plugin/pom.xml

@@ -187,6 +187,22 @@
                 </configuration>
             </plugin>
 
+            <plugin>
+              <groupId>org.antlr</groupId>
+              <artifactId>antlr4-testgen-maven-plugin</artifactId>
+              <version>${project.version}</version>
+              <executions>
+                <execution>
+                  <goals>
+                    <goal>antlr4.testgen</goal>
+                  </goals>
+                  <configuration>
+                    <runtimeTemplates>${session.executionRootDirectory}/runtime-testsuite/resources/org/antlr/v4/test/runtime/java/Java.test.stg</runtimeTemplates>
+                  </configuration>
+                </execution>
+              </executions>
+            </plugin>
+
         </plugins>
 
     </build>

runtime-testsuite/pom.xml

@@ -23,17 +23,6 @@
       <artifactId>ST4</artifactId>
       <version>4.0.8</version>
     </dependency>
-    <dependency>
-      <groupId>org.antlr</groupId>
-      <artifactId>antlr4</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>org.antlr</groupId>
-      <artifactId>antlr4</artifactId>
-      <version>${project.version}</version>
-      <type>test-jar</type>
-    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
@@ -44,6 +33,7 @@
 
   <build>
     <sourceDirectory>src</sourceDirectory>
+    <testSourceDirectory>ignored</testSourceDirectory>
     <pluginManagement>
       <plugins>
         <plugin>
@@ -112,6 +102,5 @@
         <artifactId>maven-surefire-plugin</artifactId>
       </plugin>
     </plugins>
-    <testSourceDirectory>ignored</testSourceDirectory>
   </build>
 </project>

runtime-testsuite/src/org/antlr/v4/testgen/TestGenerator.java

@@ -64,10 +64,6 @@ public class TestGenerator {
 	 *
 	 * Example:
 	 *
-	 * $ java org.antlr.v4.testgen.TestGenerator -o /tmp -templates /Users/parrt/antlr/code/antlr4/tool/test/org/antlr/v4/test/runtime/java/Java.test.stg
-	 * 
-	 * Most commonly:
-	 * 
 	 * $ java org.antlr.v4.testgen.TestGenerator -root /Users/parrt/antlr/code/antlr4
 	 */
 	public static void main(String[] args) {
@@ -280,8 +276,7 @@ public class TestGenerator {
 	public String getTestTemplatesResourceDir() { return "org/antlr/v4/test/runtime/templates"; }
 
 	public String getTargetNameFromTemplatesFileName() {
-		// runtimeTemplates is like /Users/parrt/antlr/code/antlr4/tool/test/org/antlr/v4/test/runtime/java/Java.test.stg
-		// extra target name
+		// runtimeTemplates is like ~/antlr/code/antlr4/runtime-testsuite/resources/org/antlr/v4/test/runtime/java/Java.test.stg
 		int targetEnd = runtimeTemplates.getName().indexOf(".test.stg");
 		return runtimeTemplates.getName().substring(0, targetEnd);
 	}

tool/pom.xml

@@ -85,22 +85,6 @@
           </execution>
         </executions>
       </plugin>
-
-      <plugin>
-        <groupId>org.antlr</groupId>
-        <artifactId>antlr4-testgen-maven-plugin</artifactId>
-        <version>${project.version}</version>
-        <executions>
-          <execution>
-            <goals>
-              <goal>antlr4.testgen</goal>
-            </goals>
-            <configuration>
-              <runtimeTemplates>test/org/antlr/v4/test/runtime/java/Java.test.stg</runtimeTemplates>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
     </plugins>
   </build>
 </project>