Arrays without an items schema

They can now use the new ANY type

.changeset/grumpy-keys-change.md

@@ -0,0 +1,5 @@
+---
+"@openapi-generator-plus/core": minor
+---
+
+Add support for arrays without a specified items schema

packages/core/src/__tests__/openapiv31.spec.ts

@@ -1,6 +1,6 @@
 import { createTestDocument } from './common'
 import { idx } from '..'
-import { CodegenAllOfStrategy, CodegenObjectSchema, CodegenSchemaType } from '@openapi-generator-plus/types'
+import { CodegenAllOfStrategy, CodegenArraySchema, CodegenObjectSchema, CodegenSchemaType } from '@openapi-generator-plus/types'
 import { findProperty } from '../process/schema/utils'
 
 test('process document', async() => {
@@ -98,3 +98,16 @@ test('any schema', async() => {
 	const property = idx.get(schema.properties!, 'test')
 	expect(property?.schema.schemaType).toBe(CodegenSchemaType.ANY)
 })
+
+test('array without items schema', async() => {
+	const result = await createTestDocument('openapiv31/array-without-items-schema.yml')
+	expect(result).toBeDefined()
+
+	const schema = idx.get(result.schemas, 'TestObject') as CodegenObjectSchema
+	expect(schema.schemaType).toBe(CodegenSchemaType.OBJECT)
+
+	const property = idx.get(schema.properties!, 'test')
+	expect(property?.schema.schemaType).toBe(CodegenSchemaType.ARRAY)
+
+	expect((property?.schema as CodegenArraySchema).component.schema.schemaType).toBe(CodegenSchemaType.ANY)
+})

packages/core/src/__tests__/openapiv31/array-without-items-schema.yml

@@ -0,0 +1,17 @@
+openapi: 3.1.0
+info:
+  title: Array without items schema
+  description: Lorem ipsum
+  version: '1.0.1'
+servers:
+- url: http://example.com/api/v1
+  description: Example server
+- url: https://example.com/api/v1
+paths: {}
+components:
+  schemas:
+    TestObject:
+      type: object
+      properties:
+        test:
+          type: array

packages/core/src/process/schema/array.ts

@@ -13,14 +13,10 @@ export function toCodegenArraySchema(apiSchema: OpenAPIX.SchemaObject, naming: S
 		throw new Error('Not an array schema')
 	}
 
-	if (!apiSchema.items) {
-		throw new Error('items missing for schema type "array"')
-	}
-
 	const vendorExtensions = toCodegenVendorExtensions(apiSchema)
 
 	/* Component properties are implicitly required as we don't expect to have `null` entries in the array. */
-	const componentSchemaUsage = toCodegenSchemaUsage(apiSchema.items, state, {
+	const componentSchemaUsage = toCodegenSchemaUsage(apiSchema.items || {}, state, {
 		required: true,
 		suggestedName: suggestedItemModelName,
 		purpose: CodegenSchemaPurpose.ARRAY_ITEM,