Upgrade TypeScript and typecheck tests

.vscode/settings.json

@@ -11,5 +11,6 @@
   "editor.wordWrapColumn": 80,
   "files.trimTrailingWhitespace": true,
   "files.insertFinalNewline": true,
-  "typescript.tsdk": "./node_modules/typescript/lib"
+  "typescript.tsdk": "./node_modules/typescript/lib",
+  "typescript.enablePromptUseWorkspaceTsdk": true
 }

.vscode/tasks.json

@@ -1,27 +1,25 @@
 {
-	"version": "2.0.0",
-	"tasks": [
-		{
-			"label": "TypeScript watch",
-			"type": "shell",
-			"command": "./node_modules/.bin/tsc",
-			"args": [
-				"--build",
-				"tsconfig.build.json",
-				"--watch"
-			],
-			"isBackground": true,
-			"problemMatcher": [
-				"$tsc-watch"
-			],
-			"group": {
-				"kind": "build",
-				"isDefault": true
-			},
-			"presentation": {
-				"reveal": "never",
-				"panel": "dedicated"
-			}
-		}
-	]
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "TypeScript watch",
+      "type": "typescript",
+      "tsconfig": "tsconfig.json",
+      "option": "watch",
+      "problemMatcher": ["$tsc-watch"],
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "presentation": {
+        "reveal": "never",
+        "revealProblems": "never",
+        "panel": "shared",
+        "clear": true
+      },
+      "runOptions": {
+        "runOn": "folderOpen"
+      }
+    }
+  ]
 }

CHANGELOG.md

@@ -19,6 +19,8 @@ The version headers in this history reflect the versions of Apollo Server itself
 - The `graphql-extensions` API (e.g., `GraphQLExtensions`, `extensions`) has been dropped in favor of the new [plugins API](https://www.apollographql.com/docs/apollo-server/integrations/plugins/).
 - In order to let the `graphql-upload` package evolve on its own, uploads are no longer integrated directly with Apollo Server.  To bring them back in their current form, see [the migration guide section on File Uploads](./docs/source/migration.md#File-uploads)
 - Removed deprecated `ApolloServer.schema` field, which never worked with gateways. If you'd like to extract your schema from your server, make a plugin with `serverWillStart`, or register `onSchemaChange` on your gateway.
+- `apollo-server-caching`: The test suite helper works differently, and the `TestableKeyValueCache` interface is removed.
+- `apollo-datasource-rest`: We no longer officially support overriding the `baseURL` property with a getter, because TypeScript 4 does not allow you to do that.
 - Top-level exports have changed. E.g.,
 
   - We no longer re-export the entirety of `graphql-tools` (including `makeExecutableSchema`) from all Apollo Server packages.

docs/source/data/data-sources.mdx

@@ -305,19 +305,7 @@ class PersonalizationAPI extends RESTDataSource {
 
 ### Resolving URLs dynamically
 
-In some cases, you'll want to set your REST API's base URL based on the environment or other contextual values. You can use a getter for this:
-
-```js
-get baseURL() {
-  if (this.context.env === 'development') {
-    return 'https://movies-api-dev.example.com/';
-  } else {
-    return 'https://movies-api.example.com/';
-  }
-}
-```
-
-If you need more customization, including the ability to resolve a URL asynchronously, you can also override `resolveURL`:
+In some cases, you'll want to set the URL based on the environment or other contextual values. To do this, you can override `resolveURL`:
 
 ```js
 async resolveURL(request: RequestOptions) {

jest.config.base.js

@@ -13,16 +13,6 @@ module.exports = {
       "/dist/"
     ],
     moduleFileExtensions: [...defaults.moduleFileExtensions, "ts", "tsx"],
-    moduleNameMapper: {
-      '^__mocks__/(.*)$': '<rootDir>/../../__mocks__/$1',
-      // This regex should match the packages that we want compiled from source
-      // through `ts-jest`, as opposed to loaded from their output files in
-      // `dist`.
-      // We don't want to match `apollo-server-env` and
-      // `apollo-reporting-protobuf`, because these don't depend on
-      // compilation but need to be initialized from as parto of `prepare`.
-      '^(?!apollo-server-env|apollo-reporting-protobuf)(apollo-(?:server|datasource|cache-control|tracing)[^/]*)(?:/dist)?((?:/.*)|$)': '<rootDir>/../../packages/$1/src$2'
-    },
     clearMocks: true,
     globals: {
       "ts-jest": {