Add tests for unsupported types

tests/test-unsupported

@@ -0,0 +1,37 @@
+#!/bin/bash
+set -euo pipefail
+
+# Verify that all the unsupported.*parquet files result in an error when creating the virtual table,
+# but don't segfault.
+
+load_unsupported() {
+  file=${1:?must provide file to load}
+  basename=$(basename "$file")
+  cat <<EOF
+.echo on
+.load parquet/libparquet
+.testcase $basename
+.bail on
+CREATE VIRTUAL TABLE test USING parquet('$file');
+SELECT 123;
+EOF
+}
+
+main() {
+  root=$(dirname "${BASH_SOURCE[0]}")/..
+  root=$(readlink -f "$root")
+  cd "$root"
+
+  unsupported_files=$(find . -type f -name 'unsupported*.parquet')
+  while read -r unsupported; do
+    echo "Testing: $unsupported"
+    "$root"/sqlite/sqlite3 -init <(load_unsupported "$unsupported") < /dev/null > /dev/null 2> testcase-err.txt
+    # We expect the 'SELECT 123' command to NOT have been run
+    if grep -q 123 testcase-out.txt; then
+      echo "...FAILED" >&2
+      exit 1
+    fi
+  done < <(echo "$unsupported_files")
+}
+
+main "$@"