Use venom for tests

Dockerfile

@@ -59,9 +59,12 @@ ENV PATH=/data/node_modules/.bin:$PATH
 
 # Temporary build stage where we can run the test suite.
 FROM base AS test
-COPY --from=ghcr.io/goss-org/goss:latest /usr/bin/goss /usr/bin/goss
-ADD goss.yml /tmp/goss.yml
-RUN goss --gossfile=/tmp/goss.yml validate
+
+USER root
+RUN apk add bats
+
+ADD tests.bats /tmp/tests.bats
+RUN bats /tmp/tests.bats
 
 FROM base AS run
 CMD ["bash"]

tests.bats

@@ -0,0 +1,25 @@
+#!/usr/bin/env bats
+
+setup() {
+  # load helper libraries when using the official Docker image
+  bats_load_library bats-support
+  bats_load_library bats-assert
+}
+
+@test "npm --help exits 1 and mentions DISCLAIMER" {
+  run npm --help
+  [ "$status" -eq 1 ]
+  assert_output --partial "DISCLAIMER"
+}
+
+@test "yarn --help exits 0 and mentions DISCLAIMER" {
+  run yarn --help
+  [ "$status" -eq 0 ]
+  assert_output --partial "DISCLAIMER"
+}
+
+@test "pnpm --help exits 0 and mentions 'compiled to binary'" {
+  run pnpm --help
+  [ "$status" -eq 0 ]
+  assert_output --partial "compiled to binary"
+}