add modules test

The build of package 'nodeinfo' is implicitly tested by the modules test.

test/run-tests.sh

@@ -0,0 +1,106 @@
+#!/usr/bin/env bash
+
+# Modules integration test runner.
+# The test (./test.nix) uses the NixOS testing framework and is executed in a VM.
+#
+# Usage:
+#   Run test
+#   ./run-tests.sh
+#
+#   Run test and save result to avoid garbage collection
+#   ./run-tests.sh build --out-link /tmp/nix-bitcoin-test
+#
+#   Run interactive test debugging
+#   ./run-tests.sh debug
+#
+#   This starts the testing VM and drops you into a Python REPL where you can
+#   manually execute the tests from ./test-script.py
+
+set -eo pipefail
+
+numCPUs=${numCPUs:-$(nproc)}
+# Min. 800 MiB needed to avoid 'out of memory' errors
+memoryMiB=${memoryMiB:-2048}
+
+scriptDir=$(cd "${BASH_SOURCE[0]%/*}" && pwd)
+
+getPkgs() {
+    nix eval --raw -f "$scriptDir/../pkgs/nixpkgs-pinned.nix" $1
+}
+export NIX_PATH=nixpkgs=$(getPkgs nixpkgs):nixpkgs-unstable=$(getPkgs nixpkgs-unstable)
+
+# Run the test. No temporary files are left on the host system.
+run() {
+    # TMPDIR is also used by the test driver for VM tmp files
+    export TMPDIR=$(mktemp -d -p /tmp nix-bitcoin-test.XXXXXX)
+    trap "rm -rf $TMPDIR" EXIT
+
+    nix-build --out-link $TMPDIR/driver "$scriptDir/test.nix" -A driver
+
+    # Variable 'tests' contains the Python code that is executed by the driver on startup
+    if [[ $1 == --interactive ]]; then
+        echo "Running interactive testing environment"
+        tests=$(
+            echo 'is_interactive = True'
+            # The test script raises an error when 'is_interactive' is defined so
+            # that it just loads the initial helper functions and stops before
+            # executing the actual tests
+            echo 'try:'
+            echo '    exec(os.environ["testScript"])'
+            echo 'except:'
+            echo '    pass'
+            # Start VM
+            echo 'start_all()'
+            # Start REPL
+            echo 'import code'
+            echo 'code.interact(local=globals())'
+        )
+    else
+        tests='exec(os.environ["testScript"])'
+    fi
+
+    echo "VM stats: CPUs: $numCPUs, memory: $memoryMiB MiB"
+    [[ $NB_TEST_ENABLE_NETWORK ]] || QEMU_NET_OPTS='restrict=on'
+    env -i \
+        NIX_PATH="$NIX_PATH" \
+        TMPDIR="$TMPDIR" \
+        tests="$tests" \
+        QEMU_OPTS="-smp $numCPUs -m $memoryMiB -nographic $QEMU_OPTS"  \
+        QEMU_NET_OPTS="$QEMU_NET_OPTS" \
+        $TMPDIR/driver/bin/nixos-test-driver
+}
+
+debug() {
+    run --interactive
+}
+
+# Run the test by building the test derivation
+build() {
+    vmTestNixExpr | nix-build --no-out-link "$@" -
+}
+
+# On continuous integration nodes there are few other processes running alongside the
+# test, so use more memory here for maximum performance.
+exprForCI() {
+    memoryMiB=3072
+    memTotalKiB=$(awk '/MemTotal/ { print $2 }' /proc/meminfo)
+    memAvailableKiB=$(awk '/MemAvailable/ { print $2 }' /proc/meminfo)
+    # Round down to nearest multiple of 50 MiB for improved test build caching
+    ((memAvailableMiB = memAvailableKiB / (1024 * 50) * 50))
+    ((memAvailableMiB < memoryMiB)) && memoryMiB=$memAvailableMiB
+    >&2 echo "Host memory: total $((memTotalKiB / 1024)) MiB, available $memAvailableMiB MiB, VM $memoryMiB MiB"
+    vmTestNixExpr
+}
+
+vmTestNixExpr() {
+  cat <<EOF
+    (import "$scriptDir/test.nix" {}).overrideAttrs (old: rec {
+      buildCommand = ''
+        export QEMU_OPTS="-smp $numCPUs -m $memoryMiB"
+        echo "VM stats: CPUs: $numCPUs, memory: $memoryMiB MiB"
+      '' + old.buildCommand;
+    })
+EOF
+}
+
+eval "${@:-build}"