When packets are loaded, verify that they pass verifySeedPacket.

This catches instances where seeds have a local seed reference that is incorrect.

Part of #39.

src/garden.ts

@@ -17,7 +17,7 @@ import {
 } from './environment.js';
 
 import {
-	Seed, expandSeedPacket
+	Seed, expandSeedPacket, verifySeedPacket
 } from './seed.js';
 
 import {
@@ -167,6 +167,8 @@ export class Garden {
 		//Ensure seed packet is shaped properly
 		seedPacket.parse(packet);
 		const expandedPacket = expandSeedPacket(packet);
+		//This will throw if there are errors in the packet.
+		verifySeedPacket(expandedPacket);
 		if (!this._location) this._location = location;
 		for (const [id, seed] of Object.entries(expandedPacket.seeds)) {
 			const ref : AbsoluteSeedReference = {

test/base/test.ts

@@ -20,6 +20,7 @@ import {
 	EnvironmentData,
 	ExpandedSeedPacket,
 	SeedDataCompose,
+	SeedPacket,
 	SeedReference,
 	seedID,
 	seedPacket,
@@ -595,6 +596,28 @@ Suffix`;
 		assert.deepStrictEqual(result, golden);
 	});
 
+	it ('testing a packet with an invalid ref is caught', async () => {
+		const garden = loadTestGarden();
+		const packet : SeedPacket = {
+			'version': 0,
+			'seeds': {
+				'foo': {
+					'type': 'var',
+					'name': {
+						'id': 'bar-typo'
+					}
+				},
+				'bar': {
+					'type': 'log',
+					'value': 'hello, world'
+				}
+			}
+		};
+		assert.throws(() => {
+			garden.plantSeedPacket('test/base/c_test.json', packet);
+		});
+	});
+
 
 });