Fix #331

testing/SimpleUniUni.rrtest

@@ -0,0 +1,43 @@
+[SBML]
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Created by libAntimony version v2.8.0 on 2016-05-12 16:26 with libSBML version 5.11.9. -->
+<sbml xmlns="http://www.sbml.org/sbml/level3/version1/core" level="3" version="1">
+  <model id="__main" name="__main">
+    <listOfCompartments>
+      <compartment sboTerm="SBO:0000410" id="default_compartment" spatialDimensions="3" size="1" constant="true"/>
+    </listOfCompartments>
+    <listOfSpecies>
+      <species id="S1" compartment="default_compartment" initialConcentration="1" hasOnlySubstanceUnits="false" boundaryCondition="false" constant="false"/>
+      <species id="S2" compartment="default_compartment" hasOnlySubstanceUnits="false" boundaryCondition="false" constant="false"/>
+    </listOfSpecies>
+    <listOfParameters>
+      <parameter id="k1" value="0.1" constant="true"/>
+    </listOfParameters>
+    <listOfReactions>
+      <reaction id="J1" reversible="true" fast="false">
+        <listOfReactants>
+          <speciesReference species="S1" stoichiometry="1" constant="true"/>
+        </listOfReactants>
+        <listOfProducts>
+          <speciesReference species="S2" stoichiometry="1" constant="true"/>
+        </listOfProducts>
+        <kineticLaw>
+          <math xmlns="http://www.w3.org/1998/Math/MathML">
+            <apply>
+              <times/>
+              <ci> k1 </ci>
+              <ci> S1 </ci>
+            </apply>
+          </math>
+        </kineticLaw>
+      </reaction>
+    </listOfReactions>
+  </model>
+</sbml>
+
+[Stoichiometry Matrix]
+-1
+1
+
+[Reduced Stoichiometry Matrix]
+-1