Get redirect test to pass

server/config-docs.ts

@@ -211,6 +211,24 @@ export const checkURLsForCorrespondingFiles = (
   }, []);
 };
 
+// checkDuplicateRedirects checks the provided redirects for duplicates and
+// returns an array of Redirect objects. Duplicate checks are based on the
+// source of each redirect.
+export const checkDuplicateRedirects = (
+  redirects: Array<Redirect>
+): Array<Redirect> => {
+  const result: Array<Redirect> = [];
+  const uniques = new Set();
+  redirects.forEach((r) => {
+    if (uniques.has(r.source)) {
+      result.push(r);
+      return;
+    }
+    uniques.add(r.source);
+  });
+  return result;
+};
+
 // checkURLForCorrespondingFile determines whether a file exists in the content
 // directory rooted at dirRoot for the file corresponding to the provided URL path.// If a file does not exist, it returns false.
 const correspondingFileExistsForURL = (

uvu-tests/config-docs.test.ts

@@ -1,11 +1,16 @@
 import { Redirect } from "next/dist/lib/load-custom-routes";
 import { suite } from "uvu";
 import * as assert from "uvu/assert";
-import { Config, checkURLsForCorrespondingFiles } from "../server/config-docs";
+import {
+  Config,
+  checkURLsForCorrespondingFiles,
+  checkDuplicateRedirects,
+} from "../server/config-docs";
 import { generateNavPaths } from "../server/pages-helpers";
 import { randomUUID } from "crypto";
 import { join } from "path";
 import { Volume, createFsFromVolume } from "memfs";
+import type { Redirect } from "next/dist/lib/load-custom-routes";
 
 const Suite = suite("server/config-docs");
 
@@ -459,4 +464,53 @@ title: Deploying the Database Service on Kubernetes
   );
 });
 
+Suite("Checks for duplicate redirects", () => {
+  const redirects: Array<Redirect> = [
+    {
+      source: "/getting-started/",
+      destination: "/get-started/",
+      permanent: true,
+    },
+    {
+      source: "/getting-started/",
+      destination: "/get-started/",
+      permanent: true,
+    },
+    {
+      source: "/application-access/",
+      destination: "/connecting-apps/",
+      permanent: true,
+    },
+    {
+      source: "/application-access/",
+      destination: "/connecting-apps/",
+      permanent: true,
+    },
+    {
+      source: "/database-access/",
+      destination: "/connecting-databases/",
+      permanent: true,
+    },
+  ];
+
+  const expected: Array<Redirect> = [
+    {
+      source: "/getting-started/",
+      destination: "/get-started/",
+      permanent: true,
+    },
+    {
+      source: "/application-access/",
+      destination: "/connecting-apps/",
+      permanent: true,
+    },
+  ];
+
+  const actual = checkDuplicateRedirects(redirects);
+  assert.equal(actual, expected);
+});
+
+// TODO: Test for from files that exist (maybe do this in
+// CheckForCorresponding?)
+
 Suite.run();