[FEATURE] Test all supported TS versions in CI

.github/workflows/ci.yml

@@ -32,6 +32,40 @@ jobs:
       - name: linting
         run: yarn lint
 
+  types:
+    name: Type Checking (current version)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 12.x
+          cache: yarn
+      - name: install dependencies
+        run: yarn install --frozen-lockfile --non-interactive
+      - name: Check types
+        run: yarn type-check
+
+  types-range:
+    name: Type Checking (other supported versions)
+    runs-on: ubuntu-latest
+    needs: ['types']
+    strategy:
+      matrix:
+        ts-version: ['next']
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 12.x
+          cache: yarn
+      - name: install dependencies
+        run: yarn install --frozen-lockfile --non-interactive
+      - name: install TS@${{matrix.ts-version}}
+        run: yarn add -D typescript@${{ matrix.ts-version }}
+      - name: Check types with TS@${{matrix.ts-version}}
+        run: yarn type-check
+
   basic-test:
     name: Debug and Prebuilt (All Tests by Package + Canary Features)
     runs-on: ubuntu-latest
@@ -61,7 +95,7 @@ jobs:
   browserstack-test:
     name: Browserstack Tests (Safari, Edge)
     runs-on: ubuntu-latest
-    needs: [basic-test, lint]
+    needs: [basic-test, lint, types]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
@@ -87,7 +121,7 @@ jobs:
   smoke-test:
     name: Smoke tests (Full Ember Apps)
     runs-on: ubuntu-latest
-    needs: [basic-test, lint]
+    needs: [basic-test, lint, types]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v2
@@ -110,7 +144,7 @@ jobs:
   production-test:
     name: Production (All Tests + Canary Features)
     runs-on: ubuntu-latest
-    needs: [basic-test, lint]
+    needs: [basic-test, lint, types]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
@@ -130,7 +164,7 @@ jobs:
   production-debug-render-test:
     name: Production (All Tests + Canary Features with Debug Render Tree)
     runs-on: ubuntu-latest
-    needs: [basic-test, lint]
+    needs: [basic-test, lint, types]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
@@ -151,7 +185,7 @@ jobs:
   extend-prototypes-test:
     name: Extend Prototypes
     runs-on: ubuntu-latest
-    needs: [basic-test, lint]
+    needs: [basic-test, lint, types]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
@@ -172,7 +206,7 @@ jobs:
   node-test:
     name: Node.js Tests
     runs-on: ubuntu-latest
-    needs: [basic-test, lint]
+    needs: [basic-test, lint, types]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
@@ -212,7 +246,7 @@ jobs:
   browser-test:
     name: Browser Tests (Firefox)
     runs-on: ubuntu-latest
-    needs: [basic-test, lint]
+    needs: [basic-test, lint, types]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
@@ -236,7 +270,18 @@ jobs:
   deploy-tag:
     name: Deploy tags to npm
     runs-on: ubuntu-latest
-    needs: [basic-test, lint, browserstack-test, production-test, production-debug-render-test, extend-prototypes-test, node-test, blueprint-test, browser-test]
+    needs:
+      [
+        basic-test,
+        lint,
+        browserstack-test,
+        production-test,
+        production-debug-render-test,
+        extend-prototypes-test,
+        node-test,
+        blueprint-test,
+        browser-test,
+      ]
     if: startsWith(github.ref, 'refs/tags/v')
     steps:
       - uses: actions/checkout@v3
@@ -257,7 +302,18 @@ jobs:
   publish:
     name: Publish channel to s3
     runs-on: ubuntu-latest
-    needs: [basic-test, lint, browserstack-test, production-test, production-debug-render-test, extend-prototypes-test, node-test, blueprint-test, browser-test]
+    needs:
+      [
+        basic-test,
+        lint,
+        browserstack-test,
+        production-test,
+        production-debug-render-test,
+        extend-prototypes-test,
+        node-test,
+        blueprint-test,
+        browser-test,
+      ]
     # Only run on pushes to branches that are not from the cron workflow
     if: github.event_name == 'push' && contains(github.ref, 'cron') != true
     steps:
@@ -280,7 +336,18 @@ jobs:
   publish-alpha:
     name: Publish alpha from default branch
     runs-on: ubuntu-latest
-    needs: [basic-test, lint, browserstack-test, production-test, production-debug-render-test, extend-prototypes-test, node-test, blueprint-test, browser-test]
+    needs:
+      [
+        basic-test,
+        lint,
+        browserstack-test,
+        production-test,
+        production-debug-render-test,
+        extend-prototypes-test,
+        node-test,
+        blueprint-test,
+        browser-test,
+      ]
     # Only run on pushes to master
     if: github.event_name == 'push' && github.ref == 'refs/heads/master'
     steps:
@@ -301,4 +368,3 @@ jobs:
           S3_BUCKET_NAME: 'builds.emberjs.com'
           S3_SECRET_ACCESS_KEY: ${{ secrets.S3_SECRET_ACCESS_KEY}}
           S3_ACCESS_KEY_ID: ${{ secrets.S3_ACCESS_KEY_ID}}
-

.github/workflows/night-ts.yml

@@ -0,0 +1,18 @@
+name: Nightly TypeScript Run
+
+jobs:
+  ts-next:
+    name: typescript@next
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: volta-cli/action@v1
+      - run: yarn install --frozen-lockfile --non-interactive
+      - run: yarn add -D typescript@next
+      - run: yarn type-check
+
+# ...nightly at midnight
+on:
+  schedule:
+    - cron: 0 0 * * *
+  workflow_dispatch:

package.json

@@ -41,16 +41,16 @@
     "lint:docs": "qunit tests/docs/coverage-test.js",
     "lint:eslint": "eslint --report-unused-disable-directives --cache .",
     "lint:eslint:fix": "npm-run-all \"lint:eslint --fix\"",
-    "lint:tsc:stable": "tsc --noEmit",
-    "lint:tsc:preview": "tsc --noEmit --project type-tests/preview",
-    "lint:tsc": "npm-run-all lint:tsc:*",
     "lint:fix": "npm-run-all lint:*:fix",
     "test": "node bin/run-tests.js",
     "test:blueprints:js": "mocha node-tests/blueprints/**/*-test.js",
     "test:blueprints:ts": "EMBER_TYPESCRIPT_BLUEPRINTS=true yarn test:blueprints:js",
     "test:blueprints": "yarn test:blueprints:js && yarn test:blueprints:ts",
     "test:node": "qunit tests/node/**/*-test.js",
-    "test:browserstack": "node bin/run-browserstack-tests.js"
+    "test:browserstack": "node bin/run-browserstack-tests.js",
+    "type-check:stable": "tsc --noEmit",
+    "type-check:preview": "tsc --noEmit --project type-tests/preview",
+    "type-check": "npm-run-all type-check:*"
   },
   "dependencies": {
     "@babel/helper-module-imports": "^7.16.7",
@@ -98,6 +98,7 @@
     "@glimmer/validator": "0.84.2",
     "@simple-dom/document": "^1.4.0",
     "@tsconfig/ember": "^1.0.1",
+    "@types/node": "^18.7.23",
     "@types/qunit": "^2.19.2",
     "@types/rsvp": "^4.0.4",
     "@typescript-eslint/eslint-plugin": "^5.38.0",

packages/@ember/debug/data-adapter.ts

@@ -10,6 +10,7 @@ import { A as emberA } from '@ember/array';
 import type { Cache } from '@glimmer/validator';
 import { consumeTag, createCache, getValue, tagFor, untrack } from '@glimmer/validator';
 import type ContainerDebugAdapter from '@ember/debug/container-debug-adapter';
+import { assert } from '.';
 
 /**
 @module @ember/debug/data-adapter
@@ -34,13 +35,27 @@ type WrappedRecord<T> = {
 
 type RecordCallback<T> = (records: Array<{ columnValues: object; object: T }>) => void;
 
+// Represents the base contract for iterables as understood in the GLimmer VM
+// historically. This is *not* the public API for it, because there *is* no
+// public API for it. Recent versions of Glimmer simply use `Symbol.iterator`,
+// but some older consumers still use this basic shape.
+interface GlimmerIterable<T> {
+  length: number;
+  forEach(fn: (value: T) => void): void;
+}
+
 function iterate<T>(arr: Array<T>, fn: (value: T) => void): void {
   if (Symbol.iterator in arr) {
     for (let item of arr) {
       fn(item);
     }
   } else {
-    arr.forEach(fn);
+    // SAFETY: this cast required to work this way to interop between TS 4.8
+    // and 4.9. When we drop support for 4.8, it will narrow correctly via the
+    // use of the `in` operator above. (Preferably we will solve this by just
+    // switching to require `Symbol.iterator` instead.)
+    assert('', typeof (arr as unknown as GlimmerIterable<T>).forEach === 'function');
+    (arr as unknown as GlimmerIterable<T>).forEach(fn);
   }
 }
 

packages/@ember/routing/route.ts

@@ -353,7 +353,7 @@ class Route<T = unknown>
     if (params.length === 1) {
       let [name] = params;
       assert('has name', name);
-      if (name in model) {
+      if (typeof model === 'object' && name in model) {
         object[name] = get(model, name);
       } else if (/_id$/.test(name)) {
         object[name] = get(model, 'id');

yarn.lock

@@ -1666,6 +1666,11 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-16.7.10.tgz#7aa732cc47341c12a16b7d562f519c2383b6d4fc"
   integrity sha512-S63Dlv4zIPb8x6MMTgDq5WWRJQe56iBEY0O3SOFA9JrRienkOVDXSXBjjJw6HTNQYSE2JI6GMCR6LVbIMHJVvA==
 
+"@types/node@^18.7.23":
+  version "18.7.23"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-18.7.23.tgz#75c580983846181ebe5f4abc40fe9dfb2d65665f"
+  integrity sha512-DWNcCHolDq0ZKGizjx2DZjR/PqsYwAcYUJmfMWqtVU2MBMG5Mo+xFZrhGId5r/O5HOuMPyQEcM6KUBp5lBZZBg==
+
 "@types/node@^9.6.0":
   version "9.6.0"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-9.6.0.tgz#d3480ee666df9784b1001a1872a2f6ccefb6c2d7"
@@ -7708,9 +7713,9 @@ morgan@^1.10.0:
     on-headers "~1.0.2"
 
 mout@^1.0.0:
-  version "1.2.4"
-  resolved "https://registry.yarnpkg.com/mout/-/mout-1.2.4.tgz#9ffd261c4d6509e7ebcbf6b641a89b36ecdf8155"
-  integrity sha512-mZb9uOruMWgn/fw28DG4/yE3Kehfk1zKCLhuDU2O3vlKdnBBr4XaOCqVTflJ5aODavGUPqFHZgrFX3NJVuxGhQ==
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/mout/-/mout-1.2.3.tgz#bd1477d8c7f2db5fcf43c91de30b6cc746b78e10"
+  integrity sha512-vtE+eZcSj/sBkIp6gxB87MznryWP+gHIp0XX9SKrzA5TAkvz6y7VTuNruBjYdJozd8NY5i9XVIsn8cn3SwNjzg==
 
 [email protected]:
   version "2.0.0"