Merge pull request #473 from fidelman/anfidelman/relay-mock-payload-g…

…enerator-supports-nested-lists

RelayMockPayloadGenerator supports nested lists

change/@graphitation-graphql-js-operation-payload-generator-b3a83ef2-d0ca-4533-ad1e-515fc9eb0f9e.json

@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "RelayMockPayloadGenerator supports nested lists",
+  "packageName": "@graphitation/graphql-js-operation-payload-generator",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}

packages/graphql-js-operation-payload-generator/src/__tests__/RelayMockPayloadGenerator.test.ts

@@ -20,17 +20,46 @@ import {
 import { readFileSync } from "fs";
 
 import { graphql } from "@graphitation/graphql-js-tag";
+import { mergeSchemas } from "@graphql-tools/schema";
 import { generate, MockResolvers } from "..";
 import { TypeMap } from "./__generated__/schema-types";
 
 import { FIXTURE_TAG } from "relay-test-utils-internal/lib/generateTestsFromFixtures";
 
-const schema = buildSchema(
-  readFileSync(
-    require.resolve("relay-test-utils-internal/lib/testschema.graphql"),
-    "utf8",
-  ),
-);
+const schema = mergeSchemas({
+  schemas: [
+    buildSchema(
+      readFileSync(
+        require.resolve("relay-test-utils-internal/lib/testschema.graphql"),
+        "utf8",
+      ),
+    ),
+    // extension over "relay-test-utils-internal" schema
+    buildSchema(/* GraphQL */ `
+      type Query {
+        justList(id: ID!): [CustomNodeA!]!
+        nestedList(id: ID!): [[CustomNodeA!]!]!
+        deeplyNestedList(id: ID!): [[[CustomNodeA!]!]!]!
+      }
+
+      type CustomNodeA {
+        id: ID!
+        nodeB: CustomNodeB!
+        nodesB: [CustomNodeB!]!
+      }
+
+      type CustomNodeB {
+        id: ID!
+        nodeC: CustomNodeC!
+        nodesC: [CustomNodeC!]!
+      }
+
+      type CustomNodeC {
+        id: ID!
+      }
+    `),
+  ],
+});
 
 function testGeneratedData(
   documentNode: DocumentNode,
@@ -2067,3 +2096,191 @@ test("uses explicit mock data over type based mock data", () => {
     },
   );
 });
+
+test("mocks list with nested structure", () => {
+  testGeneratedData(
+    graphql`
+      query RelayMockPayloadGeneratorTestDeeplyNestedMockDataQuery {
+        justList(id: "my-just-list-id") {
+          __typename
+          id
+          nodeB {
+            id
+            __typename
+            nodeC {
+              id
+              __typename
+            }
+            nodesC {
+              id
+              __typename
+            }
+          }
+          nodesB {
+            id
+            __typename
+            nodeC {
+              id
+              __typename
+            }
+            nodesC {
+              id
+              __typename
+            }
+          }
+        }
+      }
+    `,
+  );
+});
+
+test("mocks list with nested structure with provided resolver", () => {
+  testGeneratedData(
+    graphql`
+      query RelayMockPayloadGeneratorTestDeeplyNestedMockDataQuery {
+        justList(id: "my-just-list-id") {
+          __typename
+          id
+          nodeB {
+            id
+            __typename
+            nodeC {
+              id
+              __typename
+            }
+            nodesC {
+              id
+              __typename
+            }
+          }
+          nodesB {
+            id
+            __typename
+            nodeC {
+              id
+              __typename
+            }
+            nodesC {
+              id
+              __typename
+            }
+          }
+        }
+      }
+    `,
+    {
+      Query: () =>
+        ({
+          justList: [
+            {
+              __typename: "CustomNodeA",
+              id: "custom-nodeA-id",
+              nodeB: {
+                id: "nodeB-id",
+                __typename: "CustomNodeB",
+                nodeC: { id: "nodeC-id", __typename: "CustomNodeC" },
+                nodesC: [
+                  { id: "nodesC-id-1", __typename: "CustomNodeC" },
+                  { id: "nodesC-id-2", __typename: "CustomNodeC" },
+                ],
+              },
+              nodesB: [
+                {
+                  __typename: "CustomNodeB",
+                  id: "nodesB-id-1",
+                  nodeC: { id: "nodeC-id-1", __typename: "CustomNodeC" },
+                  nodesC: [
+                    { id: "nodesC-id-1-1", __typename: "CustomNodeC" },
+                    { id: "nodesC-id-1-2", __typename: "CustomNodeC" },
+                  ],
+                },
+                {
+                  __typename: "CustomNodeB",
+                  id: "nodesB-id-2",
+                  nodeC: { id: "nodeC-id-2", __typename: "CustomNodeC" },
+                  nodesC: [
+                    { id: "nodesC-id-2-1", __typename: "CustomNodeC" },
+                    { id: "nodesC-id-2-2", __typename: "CustomNodeC" },
+                  ],
+                },
+              ],
+            },
+          ],
+        } as any),
+    },
+  );
+});
+
+test("mocks 2d list with nested structure", () => {
+  testGeneratedData(
+    graphql`
+      query RelayMockPayloadGeneratorTestDeeplyNestedMockDataQuery {
+        nestedList(id: "my-nested-list-id") {
+          __typename
+          id
+          nodeB {
+            id
+            __typename
+            nodeC {
+              id
+              __typename
+            }
+            nodesC {
+              id
+              __typename
+            }
+          }
+          nodesB {
+            id
+            __typename
+            nodeC {
+              id
+              __typename
+            }
+            nodesC {
+              id
+              __typename
+            }
+          }
+        }
+      }
+    `,
+  );
+});
+
+test("mocks 3d list with nested structure", () => {
+  testGeneratedData(
+    graphql`
+      query RelayMockPayloadGeneratorTestDeeplyNestedMockDataQuery {
+        deeplyNestedList(id: "my-deeply-nested-list-id") {
+          __typename
+          id
+          nodeB {
+            id
+            __typename
+            nodeC {
+              id
+              __typename
+            }
+            nodesC {
+              id
+              __typename
+            }
+          }
+          nodesB {
+            id
+            __typename
+            nodeC {
+              id
+              __typename
+            }
+            nodesC {
+              id
+              __typename
+            }
+          }
+        }
+      }
+    `,
+  );
+});