-S for Seed Argument Support

src/main/java/org/scalatest/tools/maven/AbstractScalaTestMojo.java

@@ -159,6 +159,12 @@ abstract class AbstractScalaTestMojo extends AbstractMojo {
      */
     String jUnitClasses;
 
+    /**
+     * Set the seed used by generators of property-driven tests. 
+     * @parameter property="seed"
+     */
+    String seed;
+
     /**
      * Option to specify the forking mode. Can be "never" or "once". "always", which would
      * fork for each test-class, may be supported later.
@@ -467,6 +473,7 @@ List<String> sharedConfiguration() {
             addAll(testsFiles());
             addAll(junitClasses());
             addAll(spanScaleFactor());
+            addAll(seed());
         }});
     }
 
@@ -667,4 +674,19 @@ private List<String> testsFiles() {
     private List<String> junitClasses() {
         return suiteArg("-j", jUnitClasses);
     }
+
+    private List<String> seed() {
+        List<String> list = new ArrayList<String>();
+        if (seed != null) {
+            try {
+                Long.parseLong(seed);
+                list.add("-S");
+                list.add(seed);
+            }
+            catch (NumberFormatException e) {
+                throw new RuntimeException("Invalid seed value: " + seed);
+            }
+        }
+        return unmodifiableList(list);
+    }
 }

src/test/scala/org/scalatest/tools/maven/PluginTest.scala

@@ -235,6 +235,12 @@ final class PluginTest
     configure(_.memoryFiles = comma("a", "b", "c")) should containSuiteArgs("-M", "a", "b", "c")
   }
 
+  def testSeed {
+    configure { m => 
+      m.seed = "1234567890"
+    } should containSlice("-S", "1234567890")
+  }
+
   def testTestsFiles {
     configure(_.testsFiles = comma("nonesuch", "pom.xml", "src")) should containSuiteArgs("-A", "pom.xml", "src")
   }
@@ -266,4 +272,5 @@ final class PluginTest
     MojoUtils.stripNewLines("-XmsXg\r\n-XmxYg -XX:MaxPermSize=Zm") should be("-XmsXg -XmxYg -XX:MaxPermSize=Zm")
     MojoUtils.stripNewLines("-XmsXg\r\n-XmxYg") should be("-XmsXg -XmxYg")
   }
+
 }