ci: generate graphql schema in GH action

test/generateGraphQLSchema.ts

@@ -0,0 +1,19 @@
+import path from 'path';
+import fs from 'fs';
+import { generateGraphQLSchema } from '../src/bin/generateGraphQLSchema';
+
+const [testConfigDir] = process.argv.slice(2);
+
+const testDir = path.resolve(__dirname, testConfigDir);
+setPaths(testDir);
+generateGraphQLSchema();
+
+// Set config path and TS output path using test dir
+function setPaths(dir) {
+  const configPath = path.resolve(dir, 'config.ts');
+  if (fs.existsSync(configPath)) {
+    process.env.PAYLOAD_CONFIG_PATH = configPath;
+    return true;
+  }
+  return false;
+}

test/graphql-schema-gen/config.ts

@@ -0,0 +1,84 @@
+import path from 'path';
+import type { CollectionConfig } from '../../src/collections/config/types';
+import { buildConfig } from '../buildConfig';
+
+export interface Relation {
+  id: string;
+  name: string;
+}
+
+const openAccess = {
+  create: () => true,
+  read: () => true,
+  update: () => true,
+  delete: () => true,
+};
+
+const collectionWithName = (collectionSlug: string): CollectionConfig => {
+  return {
+    slug: collectionSlug,
+    access: openAccess,
+    fields: [
+      {
+        name: 'name',
+        type: 'text',
+      },
+    ],
+  };
+};
+
+export const slug = 'posts';
+export const relationSlug = 'relation';
+export default buildConfig({
+  graphQL: {
+    schemaOutputFile: path.resolve(__dirname, 'generated-schema.graphql'),
+  },
+  collections: [
+    {
+      slug,
+      access: openAccess,
+      fields: [
+        {
+          name: 'title',
+          type: 'text',
+        },
+        {
+          name: 'description',
+          type: 'text',
+        },
+        {
+          name: 'number',
+          type: 'number',
+        },
+        // Relationship
+        {
+          name: 'relationField',
+          type: 'relationship',
+          relationTo: relationSlug,
+        },
+        // Relation hasMany
+        {
+          name: 'relationHasManyField',
+          type: 'relationship',
+          relationTo: relationSlug,
+          hasMany: true,
+        },
+        // Relation multiple relationTo
+        {
+          name: 'relationMultiRelationTo',
+          type: 'relationship',
+          relationTo: [relationSlug, 'dummy'],
+        },
+        // Relation multiple relationTo hasMany
+        {
+          name: 'relationMultiRelationToHasMany',
+          type: 'relationship',
+          relationTo: [relationSlug, 'dummy'],
+          hasMany: true,
+        },
+      ],
+    },
+    collectionWithName(relationSlug),
+    collectionWithName('dummy'),
+  ],
+});