Add script to test puzzles

Makefile

@@ -11,3 +11,7 @@ init:
 # run today's puzzle
 run:
 	./scripts/run.sh
+
+# test today's puzzle
+test:
+	./scripts/test.sh

scripts/test.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+set -e
+
+export PATH="/usr/local/opt/[email protected]/bin:$PATH"
+
+year="${AOC_YEAR:-$(date +%Y)}"
+month="${AOC_MONTH:-$(date +%m)}"
+day="${AOC_DAY:-$(date +%-d)}"
+
+if [[ ! "$month" -eq 12 ]]; then
+  echo "It's not december quite yet. If you wish to run a previous puzzle"
+  echo "specify AOC_YEAR, AOC_MONTH and AOC_DAY"
+  exit 1
+fi
+
+if [[ ! -d "$year/$day" ]]; then
+  echo "Cannot find a puzzle in $year/$day. Have you forgot to initialize it?"
+  exit 1
+fi
+
+main_files="$(find "$year/$day" -depth 1 -iname "main*")"
+for file in $main_files; do
+  name="$(basename "$file")"
+  directory="$(dirname "$file")"
+  pushd "$directory"
+  case "${name##*.}" in
+    "ts")
+      NO_COLOR=1 deno test --quiet --allow-read
+      ;;
+    *)
+      echo "unsupported $file"
+  esac
+  popd
+done