Refs #20441 Add test cases

Framework/DataObjects/src/Peak.cpp

@@ -796,6 +796,8 @@ double Peak::getSigmaIntensity() const { return m_sigmaIntensity; }
 
 /** Return the peak intensity divided by the error in the intensity */
 double Peak::getIntensityOverSigma() const {
+  if (m_sigmaIntensity == 0)
+      return 0;
   return m_intensity / m_sigmaIntensity;
 }
 

Framework/DataObjects/test/PeakTest.h

@@ -556,6 +556,45 @@ public:
     TS_ASSERT(Mock::VerifyAndClearExpectations(replacementShape));
   }
 
+  void test_get_intensity_over_sigma() {
+    const int detectorId = 19999;
+    const double wavelength = 2;
+    const double intensity {100};
+    const double sigma {10};
+    Peak p(inst, detectorId, wavelength);
+
+    p.setIntensity(intensity);
+    p.setSigmaIntensity(sigma);
+
+    TS_ASSERT_EQUALS(p.getIntensityOverSigma(), intensity/sigma);
+  }
+
+  void test_get_intensity_over_sigma_empty_sigma() {
+    const int detectorId = 19999;
+    const double wavelength = 2;
+    const double intensity {0};
+    const double sigma {0};
+    Peak p(inst, detectorId, wavelength);
+
+    p.setIntensity(intensity);
+    p.setSigmaIntensity(sigma);
+
+    TS_ASSERT_DELTA(p.getIntensityOverSigma(), 0, 1e-10);
+  }
+
+  void test_get_energy() {
+    const int detectorId = 19999;
+    const double wavelength = 2;
+    const double initialEnergy{100};
+    const double finalEnergy{110};
+    Peak p(inst, detectorId, wavelength);
+
+    p.setInitialEnergy(initialEnergy);
+    p.setFinalEnergy(finalEnergy);
+
+    TS_ASSERT_EQUALS(p.getEnergy(), initialEnergy - finalEnergy);
+  }
+
 private:
   void check_Contributing_Detectors(const Peak &peak,
                                     const std::vector<int> &expected) {