message: Add mixed mesh tests to "CEED mass & diffusion".
diff: @@ -427,10 +427,15 @@ TEST_CASE("CEED mass & diffusion", "[CEED]")
  auto pb = GENERATE(Problem::Mass,Problem::Diffusion,Problem::MassDiffusion,
  Problem::VectorMass,Problem::VectorDiffusion);
  auto order = GENERATE(1);
  - auto mesh = GENERATE("../../data/inline-quad.mesh","../../data/inline-hex.mesh",
  + auto mesh = GENERATE("../../data/inline-quad.mesh",
  + "../../data/inline-hex.mesh",
  "../../data/periodic-square.mesh",
  - "../../data/star-q2.mesh","../../data/fichera-q2.mesh",
  - "../../data/amr-quad.mesh","../../data/fichera-amr.mesh");
  + "../../data/star-q2.mesh",
  + "../../data/fichera-q2.mesh",
  + "../../data/amr-quad.mesh",
  + "../../data/fichera-amr.mesh",
  + "../../data/square-mixed.mesh",
  + "../../data/fichera-mixed.mesh");
  test_ceed_operator(mesh, order, coeff_type, pb, assembly);
  } // test case
  