ci: added script to the CI step for comparing parallel run results

.github/compare_parallel_results.sh

@@ -0,0 +1,29 @@
+#! /bin/bash
+
+for processes in 2 4 8; do
+    if [ -s "diffs" ]; then
+        rm diffs
+    fi
+
+    for file in $(ls bin_1/fromfile_sol.zarr/); do
+        filename=$(ls bin_1/fromfile_sol.zarr/$file)
+        hexdump bin_1/fromfile_sol.zarr/$file/$filename > original
+        hexdump bin_${processes}/fromfile_sol.zarr/$file/$filename > new
+        diff original new >> diffs
+    done;
+    rm new original
+
+    diff bin_1/fromfile_sol.zarr/.zattrs bin_${processes}/fromfile_sol.zarr/.zattrs >> diffs
+    diff bin_1/fromfile_sol.zarr/.zgroup bin_${processes}/fromfile_sol.zarr/.zgroup >> diffs
+    for file in $(ls bin_1/fromfile_sol.zarr/); do
+        filename=$(ls -la bin_1/fromfile_sol.zarr/$file)
+        diff bin_1/fromfile_sol.zarr/$file/.zattrs bin_${processes}/fromfile_sol.zarr/$file/.zattrs >> diffs
+        diff bin_1/fromfile_sol.zarr/$file/.zarray bin_${processes}/fromfile_sol.zarr/$file/.zarray >> diffs
+    done;
+
+    if [ -s "diffs" ]; then
+      echo "Run with ${processes} processes has different results than sequential run"
+      exit 1;
+    fi
+done;
+exit 0;

.github/workflows/build.yml

@@ -101,3 +101,4 @@ jobs:
         mv bin bin_4
         mpiexec -n 8 --host localhost:64 ./examples/fromfile/src/fromfile ../examples/fromfile/src/config/fromfile_config.yaml
         mv bin bin_8
+        bash -l ../.github/compare_parallel_results.sh