add tests/examples/step-15

diff --git a/tests/examples/step-15.diff b/tests/examples/step-15.diff
new file mode 100644 (file)
index 0000000..68a3cb7
--- /dev/null
+++ b/tests/examples/step-15.diff
@@ -0,0 +1,4 @@
+684c684
+<     while (last_residual_norm > 1e-2);
+---
+>     while (last_residual_norm > 1e-1);

diff --git a/tests/examples/step-15.output b/tests/examples/step-15.output
new file mode 100644 (file)
index 0000000..3d47787
--- /dev/null
+++ b/tests/examples/step-15.output
@@ -0,0 +1,48 @@
+Mesh refinement step 0
+  Initial residual: 1.53143
+  Residual: 1.08746
+  Residual: 0.966748
+  Residual: 0.859602
+  Residual: 0.766462
+  Residual: 0.685475
+
+Mesh refinement step 1
+  Initial residual: 0.868959
+  Residual: 0.762125
+  Residual: 0.677792
+  Residual: 0.605762
+  Residual: 0.542748
+  Residual: 0.48704
+
+Mesh refinement step 2
+  Initial residual: 0.426445
+  Residual: 0.382731
+  Residual: 0.343865
+  Residual: 0.30918
+  Residual: 0.278147
+  Residual: 0.250327
+
+Mesh refinement step 3
+  Initial residual: 0.282026
+  Residual: 0.253146
+  Residual: 0.227414
+  Residual: 0.20441
+  Residual: 0.183803
+  Residual: 0.165319
+
+Mesh refinement step 4
+  Initial residual: 0.154404
+  Residual: 0.138723
+  Residual: 0.124694
+  Residual: 0.112124
+  Residual: 0.100847
+  Residual: 0.0907222
+
+Mesh refinement step 5
+  Initial residual: 0.0819655
+  Residual: 0.0737378
+  Residual: 0.0663465
+  Residual: 0.0597032
+  Residual: 0.0537298
+  Residual: 0.0483571
+