Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Calculator/HydraRingCalculatorBaseTest.cs
===================================================================
diff -u -re69acb9595f7bf1d202ddd1fb51934b66768b75d -rb646e027b7b030947d7339c442d44810d9347893
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Calculator/HydraRingCalculatorBaseTest.cs	(.../HydraRingCalculatorBaseTest.cs)	(revision e69acb9595f7bf1d202ddd1fb51934b66768b75d)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Calculator/HydraRingCalculatorBaseTest.cs	(.../HydraRingCalculatorBaseTest.cs)	(revision b646e027b7b030947d7339c442d44810d9347893)
@@ -19,13 +19,128 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
+using System.Collections.Generic;
 using NUnit.Framework;
+using Ringtoets.HydraRing.Calculation.Calculator;
+using Ringtoets.HydraRing.Calculation.Data;
+using Ringtoets.HydraRing.Calculation.Data.Input;
+using Ringtoets.HydraRing.Calculation.Parsers;
 
 namespace Ringtoets.HydraRing.Calculation.Test.Calculator
 {
     [TestFixture]
     public class HydraRingCalculatorBaseTest
     {
-         
+        [Test]
+        public void Constructor_WithoutHlcdDirectory_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate test = () => new TestHydraRingCalculator(null, null);
+
+            // Assert
+            var paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("hlcdDirectory", paramName);
+        }
+
+        [Test]
+        public void Constructor_WithHlcdDirectory_InitializesOutputWithoutValues()
+        {
+            // Call
+            var calculator = new TestHydraRingCalculator("", null);
+
+            // Assert
+            Assert.IsNull(calculator.OutputFileContent);
+        }
+
+        [Test]
+        public void Calculate_WithCustomParser_ParsersExecutedAndOutputSet()
+        {
+            // Setup
+            var calculator = new TestHydraRingCalculator("", null);
+
+            // Call
+            calculator.PublicCalculate();
+
+            // Assert
+            Assert.AreEqual("Fatal error: File not found: HLCD.sqlite\r\n", calculator.OutputFileContent);
+            Assert.IsTrue(calculator.Output);
+        }
     }
+
+    internal class TestHydraRingCalculator : HydraRingCalculatorBase
+    {
+        private readonly TestParser parser;
+
+        public TestHydraRingCalculator(string hlcdDirectory, string ringId) : base(hlcdDirectory, ringId)
+        {
+            parser = new TestParser();
+        }
+
+        public bool Output { get; set; }
+
+        public void PublicCalculate()
+        {
+            Calculate(HydraRingUncertaintiesType.All, new TestHydraRingCalculationInput());
+        }
+
+        protected override void SetOutputs()
+        {
+            Output = parser.Parsed;
+        }
+
+        protected override IEnumerable<IHydraRingFileParser> GetParsers()
+        {
+            yield return parser;
+        }
+    }
+
+    internal class TestHydraRingCalculationInput : HydraRingCalculationInput
+    {
+        private readonly HydraRingSection section = new HydraRingSection(12, 12, 12);
+
+        public TestHydraRingCalculationInput() : base(12) {}
+
+        public override HydraRingFailureMechanismType FailureMechanismType
+        {
+            get
+            {
+                return 0;
+            }
+        }
+
+        public override int CalculationTypeId
+        {
+            get
+            {
+                return 0;
+            }
+        }
+
+        public override int VariableId
+        {
+            get
+            {
+                return 0;
+            }
+        }
+
+        public override HydraRingSection Section
+        {
+            get
+            {
+                return section;
+            }
+        }
+    }
+
+    internal class TestParser : IHydraRingFileParser
+    {
+        public bool Parsed { get; set; }
+
+        public void Parse(string workingDirectory, int sectionId)
+        {
+            Parsed = true;
+        }
+    }
 }
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