tests for $ref resolution across schemas

Author: aeschli

src/test/schema.test.ts

@@ -411,6 +411,96 @@ suite('JSON Schema', () => {
 
 	});
 
+
+	test('Resolving external $ref two levels', async function () {
+		const service = new SchemaService.JSONSchemaService(newMockRequestService(), workspaceContext);
+		service.setSchemaContributions({
+			schemas: {
+				"https://myschemastore/main/schema1.json": {
+					id: 'https://myschemastore/main/schema1.json',
+					definitions: {
+						"world": {
+							$id: '#world',
+							type: 'string',
+							const: 'world'
+						}
+					},
+					type: 'object',
+					properties: {
+						p1: {
+							$ref: 'schema2.json#blue'
+						}
+					}
+				},
+				"https://myschemastore/main/schema3.json": {
+					id: 'https://myschemastore/main/schema3.json',
+					definitions: {
+						"world": {
+							$id: '#world',
+							type: 'string',
+							const: 'world'
+						}
+					}
+				},
+				"https://myschemastore/main/schema2.json": {
+					id: 'https://myschemastore/main/schema2.json',
+					definitions: {
+						"blue": {
+							$id: '#blue',
+							$ref: 'schema3.json#world'
+						}
+					}
+				}
+			}
+		});
+
+		const resolvedSchema = await service.getResolvedSchema('https://myschemastore/main/schema1.json');
+		assert.deepStrictEqual(resolvedSchema?.schema.properties?.p1, {
+			type: 'string',
+			const: 'world'
+		});
+	});
+
+
+	test('Resolving external $ref recursive', async function () {
+		const service = new SchemaService.JSONSchemaService(newMockRequestService(), workspaceContext);
+		service.setSchemaContributions({
+			schemas: {
+				"https://myschemastore/main/schema1.json": {
+					id: 'https://myschemastore/main/schema1.json',
+					definitions: {
+						"world": {
+							$id: '#world',
+							type: 'string',
+							const: 'world'
+						}
+					},
+					type: 'object',
+					properties: {
+						p1: {
+							$ref: 'schema2.json#blue'
+						}
+					}
+				},
+				"https://myschemastore/main/schema2.json": {
+					id: 'https://myschemastore/main/schema2.json',
+					definitions: {
+						"blue": {
+							$id: '#blue',
+							$ref: 'schema1.json#world'
+						}
+					}
+				}
+			}
+		});
+
+		const resolvedSchema = await service.getResolvedSchema('https://myschemastore/main/schema1.json');
+		assert.deepStrictEqual(resolvedSchema?.schema.properties?.p1, {
+			type: 'string',
+			const: 'world'
+		});
+	});
+
 	test('Resolving $refs 5', async function() {
 		const service = new SchemaService.JSONSchemaService(newMockRequestService(), workspaceContext);
 		service.setSchemaContributions({