tests: add pytest framework for vdkr and vpdmn

Add pytest-based test suite for testing vdkr and vpdmn CLI tools.
Tests use a separate state directory (~/.vdkr-test/) to avoid
interfering with production images.

Test files:
- conftest.py: Pytest fixtures for VdkrRunner and VpdmnRunner
- test_vdkr.py: Docker CLI tests (images, vimport, vrun, volumes, etc.)
- test_vpdmn.py: Podman CLI tests (mirrors vdkr test coverage)
- memres-test.sh: Helper script for running tests with memres
- pytest.ini: Pytest configuration and markers

Test categories:
- Basic operations: images, info, version
- Import/export: vimport, load, save
- Container execution: vrun, run, exec
- Storage management: system df, vstorage
- Memory resident mode: memres/vmemres start/stop/status

Running tests:
    pytest tests/test_vdkr.py -v --vdkr-dir /tmp/vcontainer-standalone
    pytest tests/test_vpdmn.py -v --vdkr-dir /tmp/vcontainer-standalone

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/tests/memres-test.sh b/tests/memres-test.sh
new file mode 100755
index 00000000..5f10751d
--- /dev/null
+++ b/tests/memres-test.sh
@@ -0,0 +1,87 @@
+#!/bin/bash
+# Helper script to manage memres for the test state directory.
+#
+# Usage:
+#   ./memres-test.sh start [--vdkr-dir /path/to/vdkr] [--arch x86_64|aarch64]
+#   ./memres-test.sh stop  [--vdkr-dir /path/to/vdkr] [--arch x86_64|aarch64]
+#   ./memres-test.sh status [--vdkr-dir /path/to/vdkr] [--arch x86_64|aarch64]
+
+set -e
+
+# Defaults
+VDKR_DIR="${VDKR_STANDALONE_DIR:-/tmp/vdkr-standalone}"
+ARCH="${VDKR_ARCH:-x86_64}"
+TEST_STATE_DIR="$HOME/.vdkr-test"
+
+# Parse arguments
+CMD=""
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        start|stop|status)
+            CMD="$1"
+            shift
+            ;;
+        --vdkr-dir)
+            VDKR_DIR="$2"
+            shift 2
+            ;;
+        --arch)
+            ARCH="$2"
+            shift 2
+            ;;
+        *)
+            echo "Unknown option: $1" >&2
+            exit 1
+            ;;
+    esac
+done
+
+if [ -z "$CMD" ]; then
+    echo "Usage: $0 start|stop|status [--vdkr-dir PATH] [--arch x86_64|aarch64]" >&2
+    exit 1
+fi
+
+# Validate vdkr directory
+if [ ! -d "$VDKR_DIR" ]; then
+    echo "Error: vdkr directory not found: $VDKR_DIR" >&2
+    echo "Set VDKR_STANDALONE_DIR or use --vdkr-dir" >&2
+    exit 1
+fi
+
+# Source environment
+if [ -f "$VDKR_DIR/init-env.sh" ]; then
+    source "$VDKR_DIR/init-env.sh"
+elif [ -f "$VDKR_DIR/setup-env.sh" ]; then
+    source "$VDKR_DIR/setup-env.sh"
+fi
+
+# Find vdkr binary - try symlink first, then main vdkr with --arch
+VDKR_BIN="$VDKR_DIR/vdkr-$ARCH"
+VDKR_ARGS=""
+if [ ! -x "$VDKR_BIN" ]; then
+    # Try main vdkr binary with --arch flag
+    VDKR_BIN="$VDKR_DIR/vdkr"
+    VDKR_ARGS="--arch $ARCH"
+    if [ ! -x "$VDKR_BIN" ]; then
+        echo "Error: vdkr binary not found: $VDKR_DIR/vdkr or $VDKR_DIR/vdkr-$ARCH" >&2
+        exit 1
+    fi
+fi
+
+STATE_DIR="$TEST_STATE_DIR/$ARCH"
+
+case "$CMD" in
+    start)
+        echo "Starting memres for tests (state: $STATE_DIR)..."
+        "$VDKR_BIN" $VDKR_ARGS --state-dir "$STATE_DIR" memres start
+        echo "Memres started. Run tests with:"
+        echo "  pytest tests/test_vdkr.py -v --vdkr-dir $VDKR_DIR --arch $ARCH --skip-destructive"
+        ;;
+    stop)
+        echo "Stopping memres for tests..."
+        "$VDKR_BIN" $VDKR_ARGS --state-dir "$STATE_DIR" memres stop
+        ;;
+    status)
+        "$VDKR_BIN" $VDKR_ARGS --state-dir "$STATE_DIR" memres status
+        ;;
+esac