Failing test for schema printing

Author: benjie

src/__testUtils__/viralSDL.ts

@@ -0,0 +1,19 @@
+export const viralSDL = `\
+schema {
+  query: Query
+}
+
+type Query {
+  viruses: [Virus!]
+}
+
+type Virus {
+  name: String!
+  knownMutations: [Mutation!]!
+}
+
+type Mutation {
+  name: String!
+  geneSequence: String!
+}\
+`;

src/__testUtils__/viralSchema.ts

@@ -0,0 +1,44 @@
+import {
+  GraphQLList,
+  GraphQLNonNull,
+  GraphQLObjectType,
+} from '../type/definition.js';
+import { GraphQLString } from '../type/scalars.js';
+import { GraphQLSchema } from '../type/schema.js';
+
+const Mutation = new GraphQLObjectType({
+  name: 'Mutation',
+  fields: {
+    name: {
+      type: new GraphQLNonNull(GraphQLString),
+    },
+    geneSequence: {
+      type: new GraphQLNonNull(GraphQLString),
+    },
+  },
+});
+
+const Virus = new GraphQLObjectType({
+  name: 'Virus',
+  fields: {
+    name: {
+      type: new GraphQLNonNull(GraphQLString),
+    },
+    knownMutations: {
+      type: new GraphQLNonNull(new GraphQLList(new GraphQLNonNull(Mutation))),
+    },
+  },
+});
+
+const Query = new GraphQLObjectType({
+  name: 'Query',
+  fields: {
+    viruses: {
+      type: new GraphQLList(new GraphQLNonNull(Virus)),
+    },
+  },
+});
+
+export const viralSchema = new GraphQLSchema({
+  query: Query,
+});

src/utilities/__tests__/printSchema-test.ts

@@ -2,6 +2,8 @@ import { expect } from 'chai';
 import { describe, it } from 'mocha';
 
 import { dedent, dedentString } from '../../__testUtils__/dedent.js';
+import { viralSchema } from '../../__testUtils__/viralSchema.js';
+import { viralSDL } from '../../__testUtils__/viralSDL.js';
 
 import { DirectiveLocation } from '../../language/directiveLocation.js';
 
@@ -867,4 +869,8 @@ describe('Type System Printer', () => {
       }
     `);
   });
+  it('prints viral schema correctly', () => {
+    const printed = printSchema(viralSchema);
+    expect(printed).to.equal(viralSDL);
+  });
 });