Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableTotalAssemblyResultTest.cs
===================================================================
diff -u -ra30b67748bed77736f62b6b3c30c82649bb9cf4e -r9c2c56fafb538c2367a09f52ff602d2bfba82f70
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableTotalAssemblyResultTest.cs	(.../SerializableTotalAssemblyResultTest.cs)	(revision a30b67748bed77736f62b6b3c30c82649bb9cf4e)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableTotalAssemblyResultTest.cs	(.../SerializableTotalAssemblyResultTest.cs)	(revision 9c2c56fafb538c2367a09f52ff602d2bfba82f70)
@@ -61,19 +61,35 @@
         }
 
         [Test]
-        [TestCase(null)]
+        public void Constructor_IdNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate call = () => new SerializableTotalAssemblyResult(null,
+                                                                          new SerializableAssessmentProcess(),
+                                                                          new SerializableFailureMechanismAssemblyResult(),
+                                                                          new SerializableFailureMechanismAssemblyResult(),
+                                                                          new SerializableAssessmentSectionAssemblyResult());
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("id", exception.ParamName);
+        }
+
+        [Test]
+        [TestCase(" ")]
         [TestCase("")]
-        public void Constructor_IdInvalid_ThrowsArgumentException(string id)
+        [TestCase(" InvalidId")]
+        public void Constructor_InvalidId_ThrowsArgumentNullException(string invalidId)
         {
             // Call
-            TestDelegate call = () => new SerializableTotalAssemblyResult(id,
+            TestDelegate call = () => new SerializableTotalAssemblyResult(invalidId,
                                                                           new SerializableAssessmentProcess(),
                                                                           new SerializableFailureMechanismAssemblyResult(),
                                                                           new SerializableFailureMechanismAssemblyResult(),
                                                                           new SerializableAssessmentSectionAssemblyResult());
 
             // Assert
-            const string expectedMessage = "'id' must have a value.";
+            const string expectedMessage = "'id' must have a value and consist only of alphanumerical characters, '-', '_' or '.'.";
             TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentException>(call, expectedMessage);
         }
 
@@ -143,7 +159,7 @@
             // Setup
             const string id = "id";
 
-            var assessmentProcess = new SerializableAssessmentProcess("process id",
+            var assessmentProcess = new SerializableAssessmentProcess("processId",
                                                                       new SerializableAssessmentSection());
             var resultWithoutProbability = new SerializableFailureMechanismAssemblyResult();
             var resultWithProbability = new SerializableFailureMechanismAssemblyResult();