Add tests for overrideReportedSchema

packages/apollo-server-core/src/plugin/schemaReporting/__tests__/index.test.ts

@@ -0,0 +1,54 @@
+import {
+  ApolloServerPluginSchemaReporting,
+  ApolloServerPluginSchemaReportingOptions,
+} from '..';
+import pluginTestHarness from 'apollo-server-core/dist/utils/pluginTestHarness';
+import { makeExecutableSchema } from 'graphql-tools';
+import { graphql } from 'graphql';
+
+describe('end-to-end', () => {
+  async function runTest({
+    pluginOptions = {},
+  }: {
+    pluginOptions?: ApolloServerPluginSchemaReportingOptions;
+  }) {
+    return await pluginTestHarness({
+      pluginInstance: ApolloServerPluginSchemaReporting(pluginOptions),
+      graphqlRequest: {
+        query: 'query { __typename }',
+      },
+      executor: async ({ request: { query }, context }) => {
+        return await graphql({
+          schema: makeExecutableSchema({ typeDefs: 'type Query { foo: Int }' }),
+          source: query,
+          // context is needed for schema instrumentation to find plugins.
+          contextValue: context,
+        });
+      },
+    });
+  }
+
+  it('fails for unparsable overrideReportedSchema', async () => {
+    await expect(
+      runTest({
+        pluginOptions: {
+          overrideReportedSchema: 'type Query {',
+        },
+      }),
+    ).rejects.toThrowErrorMatchingInlineSnapshot(
+      `"The schema provided to overrideReportedSchema failed to parse or validate: Syntax Error: Expected Name, found <EOF>"`,
+    );
+  });
+
+  it('fails for invalid overrideReportedSchema', async () => {
+    await expect(
+      runTest({
+        pluginOptions: {
+          overrideReportedSchema: 'type Query',
+        },
+      }),
+    ).rejects.toThrowErrorMatchingInlineSnapshot(
+      `"The schema provided to overrideReportedSchema failed to parse or validate: Type Query must define one or more fields."`,
+    );
+  });
+});