Re #9693 Adding unit test

Code/Mantid/Framework/Algorithms/CMakeLists.txt

@@ -646,6 +646,7 @@ set ( TEST_FILES
 	FitPeakTest.h
 	FixGSASInstrumentFileTest.h
 	FlatPlateAbsorptionTest.h
+	GeneralisedSecondDifferenceTest.h
 	GenerateEventsFilterTest.h
 	GeneratePeaksTest.h
 	GeneratePythonScriptTest.h

Code/Mantid/Framework/Algorithms/test/GeneralisedSecondDifferenceTest.h

@@ -0,0 +1,67 @@
+#ifndef GENERALISEDSECONDDIFFERENCETEST_H_
+#define GENERALISEDSECONDDIFFERENCETEST_H_
+
+#include <cxxtest/TestSuite.h>
+
+#include "MantidAlgorithms/GeneralisedSecondDifference.h"
+#include <boost/assign.hpp>
+
+using namespace Mantid::Algorithms;
+using namespace Mantid::API;
+
+class GeneralisedSecondDifferenceTest : public CxxTest::TestSuite {
+
+public:
+  void testName() {
+    TS_ASSERT_EQUALS(gsd.name(), "GeneralisedSecondDifference");
+  }
+
+  void testCategory() { TS_ASSERT_EQUALS(gsd.category(), "Arithmetic"); }
+
+  void testInit() {
+    TS_ASSERT_THROWS_NOTHING(gsd.initialize());
+    TS_ASSERT(gsd.isInitialized());
+  }
+
+  void testExec() {
+
+    std::vector<double> x =
+        boost::assign::list_of(0)(1)(2)(3)(4)(5)(6)(7)(8)(9);
+    std::vector<double> y = boost::assign::list_of(0.3)(0.3)(0.3)(0.47)(3.9)
+        (10.3)(3.9)(0.47)(0.3)(0.3);
+    MatrixWorkspace_sptr inputWs = WorkspaceFactory::Instance().create(
+        "Workspace2D", 1, y.size(), y.size());
+    inputWs->dataY(0) = y;
+    inputWs->dataX(0) = x;
+
+    gsd.setProperty("InputWorkspace", inputWs);
+    gsd.setProperty("M", "1");
+    gsd.setProperty("Z", "2");
+    gsd.setPropertyValue("OutputWorkspace", "secondDiff");
+
+    gsd.execute();
+    TS_ASSERT(gsd.isExecuted());
+
+    MatrixWorkspace_sptr outWs = Mantid::API::AnalysisDataService::Instance()
+                                     .retrieveWS<MatrixWorkspace>("secondDiff");
+    TS_ASSERT(outWs);
+
+    TS_ASSERT_EQUALS(outWs->getNumberHistograms(), 1);
+    TS_ASSERT_EQUALS(outWs->blocksize(), 4);
+
+    x = outWs->readX(0);
+    TS_ASSERT_EQUALS(x[0], 3);
+    TS_ASSERT_EQUALS(x[3], 6);
+
+    y = outWs->readY(0);
+    TS_ASSERT_DELTA(y[1], -7.0300, 0.0001);
+    TS_ASSERT_DELTA(y[2], -20.0000, 0.0001);
+
+    Mantid::API::AnalysisDataService::Instance().remove("secondDiff");
+  }
+
+private:
+  GeneralisedSecondDifference gsd;
+};
+
+#endif /* GENERALISEDSECONDDIFERENCETEST_H_ */