Add drupal8 test, for ddev#22

tests/drupal8.bats

@@ -0,0 +1,30 @@
+# Requires bats-assert and bats-support
+# brew tap kaos/shell &&
+# brew install bats-core bats-assert bats-support jq mkcert yq
+setup() {
+  load setup.sh
+}
+
+teardown() {
+  load teardown.sh
+}
+
+@test "drupal8" {
+  load per_test.sh
+  template="drupal8"
+  for source in $PROJECT_SOURCE platformsh/ddev-platformsh; do
+    echo "# ddev get $source with template ${template} PROJNAME=${PROJNAME} in ${TESTDIR} ($(pwd))" >&3
+    per_test_setup
+
+    run ddev exec -s db 'echo ${DDEV_DATABASE}'
+    assert_output "mariadb:10.4"
+    run ddev exec "php --version | awk 'NR==1 { sub(/\.[0-9]+$/, \"\", \$2); print \$2 }'"
+    assert_output "7.4"
+    ddev describe -j >describe.json
+    run  jq -r .raw.docroot <describe.json
+    assert_output "web"
+
+    docker inspect ddev-${PROJNAME}-redis >/dev/null
+    per_test_teardown
+  done
+}