[Test/GMSH2OGS] Added a test to test the conversion of linear elements

Applications/Utils/Tests.cmake

@@ -737,3 +737,14 @@ AddTest(
     DIFF_DATA
     Cube-BackPolylinePropertyChange_at_least_one_element_node_inside.vtu Cube-BackPolylinePropertyChange_at_least_one_element_node_inside.vtu ValidCells ValidCells 0 0
 )
+
+MeshTest(
+    NAME GMSH2OGS_linearElements
+    PATH Utils/GMSH2OGS
+    WORKING_DIRECTORY ${Data_SOURCE_DIR}/Utils/GMSH2OGS
+    EXECUTABLE GMSH2OGS
+    EXECUTABLE_ARGS -i linear_mesh.msh
+                    -o ${Data_BINARY_DIR}/Utils/GMSH2OGS/linear_mesh.vtu
+    REQUIREMENTS NOT (OGS_USE_MPI)
+    DIFF_DATA linear_mesh.vtu linear_mesh.vtu 1.e-16
+)

Tests/Data/Utils/GMSH2OGS/linear_mesh.msh

+$MeshFormat
+2.2 0 8
+$EndMeshFormat
+$Nodes
+12
+1 0 0 1
+2 1 0 1
+3 0 0 0
+4 1 0 0
+5 1 1 1
+6 1 1 0
+7 2 0 0
+8 2 1 0
+9 2 1 1
+10 2 0 1
+11 1 0 2
+12 0.5 -1 0.5
+$EndNodes
+$Elements
+7
+1 1 2 0 1 1 2
+2 2 2 0 1 1 2 5
+3 3 2 0 1 3 4 2 1
+4 4 2 0 1 1 2 5 11
+5 5 2 0 1 4 6 5 2 7 8 9 10
+6 6 2 0 1 3 4 6 1 2 5
+7 7 2 0 1 3 4 2 1 12
+$EndElements

Tests/Data/Utils/GMSH2OGS/linear_mesh.vtu

+<?xml version="1.0"?>
+<VTKFile type="UnstructuredGrid" version="1.0" byte_order="LittleEndian" header_type="UInt64">
+  <UnstructuredGrid>
+    <Piece NumberOfPoints="12"                   NumberOfCells="7"                   >
+      <PointData>
+      </PointData>
+      <CellData>
+        <DataArray type="Int32" Name="MaterialIDs" format="appended" RangeMin="0"                    RangeMax="0"                    offset="0"                   />
+      </CellData>
+      <Points>
+        <DataArray type="Float64" Name="Points" NumberOfComponents="3" format="appended" RangeMin="0"                    RangeMax="2.4494897428"         offset="48"                  />
+      </Points>
+      <Cells>
+        <DataArray type="Int64" Name="connectivity" format="appended" RangeMin=""                     RangeMax=""                     offset="444"                 />
+        <DataArray type="Int64" Name="offsets" format="appended" RangeMin=""                     RangeMax=""                     offset="796"                 />
+        <DataArray type="UInt8" Name="types" format="appended" RangeMin=""                     RangeMax=""                     offset="884"                 />
+      </Cells>
+    </Piece>
+  </UnstructuredGrid>
+  <AppendedData encoding="base64">
+   _HAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA8D8AAAAAAADwPwAAAAAAAAAAAAAAAAAA8D8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADwPwAAAAAAAAAAAAAAAAAAAAAAAAAAAADwPwAAAAAAAPA/AAAAAAAA8D8AAAAAAADwPwAAAAAAAPA/AAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAPA/AAAAAAAAAAAAAAAAAAAAQAAAAAAAAPA/AAAAAAAA8D8AAAAAAAAAQAAAAAAAAAAAAAAAAAAA8D8AAAAAAADwPwAAAAAAAAAAAAAAAAAAAEAAAAAAAADgPwAAAAAAAPC/AAAAAAAA4D8=AAEAAAAAAAAAAAAAAAAAAAEAAAAAAAAABAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAgAAAAAAAAADAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAAAABAAAAAAAAAAKAAAAAAAAAAMAAAAAAAAABQAAAAAAAAAEAAAAAAAAAAEAAAAAAAAABgAAAAAAAAAHAAAAAAAAAAgAAAAAAAAACQAAAAAAAAAAAAAAAAAAAAEAAAAAAAAABAAAAAAAAAACAAAAAAAAAAMAAAAAAAAABQAAAAAAAAACAAAAAAAAAAMAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAsAAAAAAAAAOAAAAAAAAAACAAAAAAAAAAUAAAAAAAAACQAAAAAAAAANAAAAAAAAABUAAAAAAAAAGwAAAAAAAAAgAAAAAAAAAA==BwAAAAAAAAADBQkKDA0O
+  </AppendedData>
+</VTKFile>