Remove supporting code for Ember < 4

Author: Robert Jackson

addon-test-support/@ember/test-helpers/-internal/get-component-manager.ts

@@ -1,4 +1,3 @@
-import Ember from 'ember';
 import {
   macroCondition,
   importSync,
@@ -11,20 +10,12 @@ if (macroCondition(dependencySatisfies('ember-source', '>=4.5.0-beta.1'))) {
   //@ts-ignore
   renderSettled = importSync('@ember/renderer').renderSettled;
 } else if (
-  macroCondition(dependencySatisfies('ember-source', '>=3.27.0-alpha.1'))
+  macroCondition(dependencySatisfies('ember-source', '>=4.0.0-alpha.1'))
 ) {
   //@ts-ignore
   renderSettled = importSync('@ember/-internals/glimmer').renderSettled;
-} else if (
-  macroCondition(dependencySatisfies('ember-source', '>=3.6.0-alpha.1'))
-) {
-  renderSettled = (Ember as any).__loader.require(
-    '@ember/-internals/glimmer'
-  ).renderSettled;
 } else {
-  renderSettled = (Ember as any).__loader.require(
-    'ember-glimmer'
-  ).renderSettled;
+  throw new Error('Using an unsupported version of Ember  (@ember/test-helpers@3.0.0+ requires Ember 4 or higher)');
 }
 
 export default renderSettled;

addon-test-support/@ember/test-helpers/-internal/is-component.ts

@@ -6,7 +6,6 @@ import {
   TestContext,
 } from './setup-context';
 import global from './global';
-import hasEmberVersion from './has-ember-version';
 import settled from './settled';
 import getTestMetadata from './test-metadata';
 import { runHooks } from './-internal/helper-hooks';
@@ -18,9 +17,7 @@ export interface ApplicationTestContext extends TestContext {
   element?: Element | null;
 }
 
-const CAN_USE_ROUTER_EVENTS = hasEmberVersion(3, 6);
 let routerTransitionsPending: boolean | null = null;
-const ROUTER = new WeakMap();
 const HAS_SETUP_ROUTER = new WeakMap();
 
 // eslint-disable-next-line require-jsdoc
@@ -37,33 +34,7 @@ export function isApplicationTestContext(
   @returns {(boolean|null)} if there are pending transitions
 */
 export function hasPendingTransitions(): boolean | null {
-  if (CAN_USE_ROUTER_EVENTS) {
-    return routerTransitionsPending;
-  }
-
-  let context = getContext();
-
-  // there is no current context, we cannot check
-  if (context === undefined) {
-    return null;
-  }
-
-  let router = ROUTER.get(context);
-
-  if (router === undefined) {
-    // if there is no router (e.g. no `visit` calls made yet), we cannot
-    // check for pending transitions but this is explicitly not an error
-    // condition
-    return null;
-  }
-
-  let routerMicrolib = router._routerMicrolib || router.router;
-
-  if (routerMicrolib === undefined) {
-    return null;
-  }
-
-  return !!routerMicrolib.activeTransition;
+  return routerTransitionsPending;
 }
 
 /**
@@ -90,28 +61,20 @@ export function setupRouterSettlednessTracking() {
 
   let { owner } = context;
   let router: Router | RouterService;
-  if (CAN_USE_ROUTER_EVENTS) {
-    // SAFETY: unfortunately we cannot `assert` here at present because the
-    // class is not exported, only the type, since it is not designed to be
-    // sub-classed. The most we can do at present is assert that it at least
-    // *exists* and assume that if it does exist, it is bound correctly.
-    let routerService = owner.lookup('service:router');
-    assert('router service is not set up correctly', !!routerService);
-    router = routerService as RouterService;
-
-    // track pending transitions via the public routeWillChange / routeDidChange APIs
-    // routeWillChange can fire many times and is only useful to know when we have _started_
-    // transitioning, we can then use routeDidChange to signal that the transition has settled
-    router.on('routeWillChange', () => (routerTransitionsPending = true));
-    router.on('routeDidChange', () => (routerTransitionsPending = false));
-  } else {
-    // SAFETY: similarly, this cast cannot be made safer because on the versions
-    // where we fall into this path, this is *also* not an exported class.
-    let mainRouter = owner.lookup('router:main');
-    assert('router:main is not available', !!mainRouter);
-    router = mainRouter as Router;
-    ROUTER.set(context, router);
-  }
+
+  // SAFETY: unfortunately we cannot `assert` here at present because the
+  // class is not exported, only the type, since it is not designed to be
+  // sub-classed. The most we can do at present is assert that it at least
+  // *exists* and assume that if it does exist, it is bound correctly.
+  let routerService = owner.lookup('service:router');
+  assert('router service is not set up correctly', !!routerService);
+  router = routerService as RouterService;
+
+  // track pending transitions via the public routeWillChange / routeDidChange APIs
+  // routeWillChange can fire many times and is only useful to know when we have _started_
+  // transitioning, we can then use routeDidChange to signal that the transition has settled
+  router.on('routeWillChange', () => (routerTransitionsPending = true));
+  router.on('routeDidChange', () => (routerTransitionsPending = false));
 
   // hook into teardown to reset local settledness state
   let ORIGINAL_WILL_DESTROY = router.willDestroy;
@@ -204,8 +167,6 @@ export function currentRouteName(): string {
   return currentRouteName;
 }
 
-const HAS_CURRENT_URL_ON_ROUTER = hasEmberVersion(2, 13);
-
 /**
   @public
   @returns {string} the applications current url
@@ -220,29 +181,22 @@ export function currentURL(): string {
 
   let router = context.owner.lookup('router:main');
 
-  if (HAS_CURRENT_URL_ON_ROUTER) {
-    let routerCurrentURL = get(router, 'currentURL');
+  let routerCurrentURL = get(router, 'currentURL');
 
-    // SAFETY: this path is a lie for the sake of the public-facing types. The
-    // framework itself sees this path, but users never do. A user who calls the
-    // API without calling `visit()` will see an `UnrecognizedURLError`, rather
-    // than getting back `null`.
-    if (routerCurrentURL === null) {
-      return routerCurrentURL as never as string;
-    }
+  // SAFETY: this path is a lie for the sake of the public-facing types. The
+  // framework itself sees this path, but users never do. A user who calls the
+  // API without calling `visit()` will see an `UnrecognizedURLError`, rather
+  // than getting back `null`.
+  if (routerCurrentURL === null) {
+    return routerCurrentURL as never as string;
+  }
 
-    assert(
-      `currentUrl should be a string, but was ${typeof routerCurrentURL}`,
-      typeof routerCurrentURL === 'string'
-    );
+  assert(
+    `currentUrl should be a string, but was ${typeof routerCurrentURL}`,
+    typeof routerCurrentURL === 'string'
+  );
 
-    return routerCurrentURL;
-  } else {
-    // SAFETY: this is *positively ancient* and should probably be removed at
-    // some point; old routers which don't have `currentURL` *should* have a
-    // `location` with `getURL()` per the docs for 2.12.
-    return (get(router, 'location') as any).getURL();
-  }
+  return routerCurrentURL;
 }
 
 /**

addon-test-support/@ember/test-helpers/-internal/render-settled.ts

@@ -15,12 +15,10 @@ import { Owner } from './build-owner';
 import getTestMetadata from './test-metadata';
 import { assert } from '@ember/debug';
 import { runHooks } from './-internal/helper-hooks';
-import hasEmberVersion from './has-ember-version';
-import isComponent from './-internal/is-component';
-import { macroCondition, dependencySatisfies } from '@embroider/macros';
 import { ComponentRenderMap, SetUsage } from './setup-context';
 import { ensureSafeComponent } from '@embroider/util';
-import type { ComponentInstance } from '@glimmer/interfaces';
+import type { ComponentInstance, InternalComponentManager } from '@glimmer/interfaces';
+import { getInternalComponentManager } from '@glimmer/manager';
 
 const OUTLET_TEMPLATE = hbs`{{outlet}}`;
 const EMPTY_TEMPLATE = hbs``;
@@ -33,6 +31,19 @@ export interface RenderingTestContext extends TestContext {
   [hasCalledSetupRenderingContext]?: true;
 }
 
+/**
+ * We should ultimately get a new API from @glimmer/runtime that provides this functionality
+ * (see https://github.com/emberjs/rfcs/pull/785 for more info).
+ * @private
+ * @param {Object} maybeComponent The thing you think might be a component
+ * @returns {boolean} True if it's a component, false if not
+ */
+function isComponent(maybeComponent: object): boolean {
+  let manager = getInternalComponentManager(maybeComponent, true);
+
+  return !!manager;
+}
+
 //  Isolates the notion of transforming a TextContext into a RenderingTestContext.
 // eslint-disable-next-line require-jsdoc
 function prepare(context: TestContext): RenderingTestContext {
@@ -131,60 +142,38 @@ export function render(
       let OutletTemplate = lookupOutletTemplate(owner);
       let ownerToRenderFrom = options?.owner || owner;
 
-      if (macroCondition(dependencySatisfies('ember-source', '<3.24.0'))) {
-        // Pre 3.24, we just don't support rendering components at all, so we error
-        // if we find anything that isn't a template.
-        const isTemplate =
-          ('__id' in templateOrComponent && '__meta' in templateOrComponent) ||
-          ('id' in templateOrComponent && 'meta' in templateOrComponent);
+      if (isComponent(templateOrComponent)) {
+        // We use this to track when `render` is used with a component so that we can throw an
+        // assertion if `this.{set,setProperty} is used in the same test
+        ComponentRenderMap.set(context, true);
+
+        const setCalls = SetUsage.get(context);
 
-        if (!isTemplate) {
-          throw new Error(
-            `Using \`render\` with something other than a pre-compiled template is not supported until Ember 3.24 (you are on ${Ember.VERSION}).`
+        if (setCalls !== undefined) {
+          assert(
+            `You cannot call \`this.set\` or \`this.setProperties\` when passing a component to \`render\`, but they were called for the following properties:\n${setCalls
+.map((key) => `  - ${key}`)
+.join('\n')}`
           );
         }
 
+        let ProvidedComponent = ensureSafeComponent(
+          templateOrComponent,
+          context
+        );
+
+        context = {
+          ProvidedComponent,
+        };
+        templateOrComponent = INVOKE_PROVIDED_COMPONENT;
+      } else {
         templateId += 1;
         let templateFullName = `template:-undertest-${templateId}` as const;
         ownerToRenderFrom.register(templateFullName, templateOrComponent);
         templateOrComponent = lookupTemplate(
           ownerToRenderFrom,
           templateFullName
         );
-      } else {
-        if (isComponent(templateOrComponent, owner)) {
-          // We use this to track when `render` is used with a component so that we can throw an
-          // assertion if `this.{set,setProperty} is used in the same test
-          ComponentRenderMap.set(context, true);
-
-          const setCalls = SetUsage.get(context);
-
-          if (setCalls !== undefined) {
-            assert(
-              `You cannot call \`this.set\` or \`this.setProperties\` when passing a component to \`render\`, but they were called for the following properties:\n${setCalls
-                .map((key) => `  - ${key}`)
-                .join('\n')}`
-            );
-          }
-
-          let ProvidedComponent = ensureSafeComponent(
-            templateOrComponent,
-            context
-          );
-
-          context = {
-            ProvidedComponent,
-          };
-          templateOrComponent = INVOKE_PROVIDED_COMPONENT;
-        } else {
-          templateId += 1;
-          let templateFullName = `template:-undertest-${templateId}` as const;
-          ownerToRenderFrom.register(templateFullName, templateOrComponent);
-          templateOrComponent = lookupTemplate(
-            ownerToRenderFrom,
-            templateFullName
-          );
-        }
       }
 
       let outletState = {
@@ -216,20 +205,6 @@ export function render(
       };
       toplevelView.setOutletState(outletState);
 
-      // Ember's rendering engine is integration with the run loop so that when a run
-      // loop starts, the rendering is scheduled to be done.
-      //
-      // Ember should be ensuring an instance on its own here (the act of
-      // setting outletState should ensureInstance, since we know we need to
-      // render), but on Ember < 3.23 that is not guaranteed.
-      if (!hasEmberVersion(3, 23)) {
-        // SAFETY: this was correct and type checked on the Ember v3 types, but
-        // since the `run` namespace does not exist in Ember v4, this no longer
-        // can be type checked. When (eventually) dropping support for Ember v3,
-        // and therefore for versions before 3.23, this can be removed entirely.
-        (run as any).backburner.ensureInstance();
-      }
-
       // returning settled here because the actual rendering does not happen until
       // the renderer detects it is dirty (which happens on backburner's end
       // hook), see the following implementation details: