Add script to run unit tests

scripts/unit_tests/driver.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+# Function to display help information
+function display_help {
+    echo "Usage:"
+    echo "  $0 binary_name all                     # Runs all standard tests"
+    echo "  $0 binary_name custom <ranks> <filter> # Runs custom test configuration"
+    echo
+    echo "Arguments:"
+    echo "  binary_name: Name of the binary to run."
+    echo "  all: Executes predefined test configurations."
+    echo "  custom: Executes a test with custom MPI ranks and GTest filter."
+    echo "  ranks: Number of MPI ranks (required for custom mode)."
+    echo "  filter: GTest filter string (required for custom mode)."
+    echo
+}
+
+# Validate number of arguments for each mode
+if [[ "$#" -lt 2 ]] || 
+   { [[ "$2" == "all" ]] && [[ "$#" -ne 2 ]]; } ||
+   { [[ "$2" == "custom" ]] && [[ "$#" -ne 4 ]]; }; then
+    display_help
+    exit 1
+fi
+
+binary_name=$1
+mode=$2
+timestamp=$(date "+%Y-%m-%d-%H:%M:%S")
+log_file="unit_tests_${timestamp}.log"
+
+# Function to execute mpirun command
+function run_mpirun {
+    local np=$1
+    local gtest_filter=$2
+    echo "mpirun -np $np $binary_name --gtest_filter='$gtest_filter'" | tee -a "$log_file"
+    mpirun -np "$np" "$binary_name" --gtest_filter="$gtest_filter" >> "$log_file" 2>&1
+}
+
+# Processing modes
+case $mode in
+    all)
+        run_mpirun 4 "-IPCImplSimpleCoarseTestFixture.*:IPCImplSimpleFineTestFixture.*"
+        run_mpirun 2 "IPCImplSimpleCoarseTestFixture.*:IPCImplSimpleFineTestFixture.*"
+        ;;
+    custom)
+        # Check if ranks is a positive integer
+        if [[ "$3" -le 1 ]]; then
+            echo "Error: 'ranks' must be a positive integer."
+            display_help
+            exit 1
+        fi
+        run_mpirun $3 $4
+        ;;
+    *)
+        echo "Error: Invalid mode '$mode'." | tee -a "$log_file"
+        display_help
+        exit 1
+        ;;
+esac
+
+echo "Tests Completed"
+echo "log file: '$log_file'"