Implemented #3843: An 8 digit keyword is generated

src/main/java/de/thm/arsnova/services/SessionService.java

@@ -195,4 +195,11 @@ public class SessionService implements ISessionService {
 		} catch (ClassCastException e) {}
 		return null;
 	}
+
+	public String generateKeyword() {
+		// Generates a number between >=low and <high, so our keyword has exactly 8 digits.
+		final int low = 10000000;
+		final int high = 100000000;
+		return String.valueOf((int)(Math.random() * (high - low) + low));
+	}
 }

src/test/java/de/thm/arsnova/services/SessionServiceTest.java

+/*
+ * Copyright (C) 2012 THM webMedia
+ * 
+ * This file is part of ARSnova.
+ *
+ * ARSnova is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * ARSnova is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package de.thm.arsnova.services;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class SessionServiceTest {
+	
+	@Test
+	public void shouldGenerateSessionKeyword() {
+		SessionService session = new SessionService();
+		System.out.println(session.generateKeyword());
+		assertTrue(session.generateKeyword().matches("^[0-9]{8}$"));
+	}
+}
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