feat(ct): svelte vite context (#26554)

packages/playwright-ct-svelte/hooks.d.ts

@@ -14,11 +14,14 @@
  * limitations under the License.
  */
 
-import type { SvelteComponent } from 'svelte';
+import type { ComponentConstructorOptions, SvelteComponent } from 'svelte';
 import type { JsonObject } from '@playwright/experimental-ct-core/types/component';
 
 export declare function beforeMount<HooksConfig extends JsonObject>(
-  callback: (params: { hooksConfig?: HooksConfig }) => Promise<void>
+  callback: (params: {
+    hooksConfig?: HooksConfig,
+    App: new (options: Partial<ComponentConstructorOptions>) => SvelteComponent
+  }) => Promise<SvelteComponent | void>
 ): void;
 export declare function afterMount<HooksConfig extends JsonObject>(
   callback: (params: {

packages/playwright-ct-svelte/registerSource.mjs

@@ -52,7 +52,7 @@ function isComponent(component) {
  */
 async function __pwResolveComponent(component) {
   if (!isComponent(component))
-    return
+    return;
 
   let componentFactory = __pwLoaderRegistry.get(component.type);
   if (!componentFactory) {
@@ -68,7 +68,7 @@ async function __pwResolveComponent(component) {
   if (!componentFactory)
     throw new Error(`Unregistered component: ${component.type}. Following components are registered: ${[...__pwRegistry.keys()]}`);
 
-  if(componentFactory)
+  if (componentFactory)
     __pwRegistry.set(component.type, await componentFactory())
 
   if ('children' in component)
@@ -84,8 +84,8 @@ function __pwCreateSlots(slots) {
 
   for (const slotName in slots) {
     const template = document
-        .createRange()
-        .createContextualFragment(slots[slotName]);
+      .createRange()
+      .createContextualFragment(slots[slotName]);
     svelteSlots[slotName] = [createSlotFn(template)];
   }
 
@@ -111,22 +111,31 @@ const __pwSvelteComponentKey = Symbol('svelteComponent');
 window.playwrightMount = async (component, rootElement, hooksConfig) => {
   await __pwResolveComponent(component);
   const componentCtor = __pwRegistry.get(component.type);
-  
+
   if (component.kind !== 'object')
     throw new Error('JSX mount notation is not supported');
 
-
-  for (const hook of window.__pw_hooks_before_mount || [])
-    await hook({ hooksConfig });
-
-  const svelteComponent = /** @type {SvelteComponent} */ (new componentCtor({
-    target: rootElement,
-    props: {
-      ...component.options?.props,
-      $$slots: __pwCreateSlots(component.options?.slots),
-      $$scope: {},
+  class App extends componentCtor {
+    constructor(options = {}) {
+      super({
+        target: rootElement,
+        props: {
+          ...component.options?.props,
+          $$slots: __pwCreateSlots(component.options?.slots),
+          $$scope: {},
+        },
+        ...options
+      });
     }
-  }));
+  }
+
+  let svelteComponent;
+  for (const hook of window.__pw_hooks_before_mount || [])
+    svelteComponent = await hook({ hooksConfig, App });
+
+  if (!svelteComponent)
+    svelteComponent = new App();
+
   rootElement[__pwSvelteComponentKey] = svelteComponent;
 
   for (const [key, listener] of Object.entries(component.options?.on || {}))

tests/components/ct-svelte-vite/playwright/index.ts

@@ -2,11 +2,17 @@ import '../src/assets/index.css';
 import { beforeMount, afterMount } from '@playwright/experimental-ct-svelte/hooks';
 
 export type HooksConfig = {
-  route: string;
+  context?: string;
+  route?: string;
 }
 
-beforeMount<HooksConfig>(async ({ hooksConfig }) => {
+beforeMount<HooksConfig>(async ({ hooksConfig, App }) => {
   console.log(`Before mount: ${JSON.stringify(hooksConfig)}`);
+  return new App({
+    context: new Map([
+      ['context-key', hooksConfig?.context]
+    ]),
+  });
 });
 
 afterMount<HooksConfig>(async () => {

tests/components/ct-svelte-vite/src/components/Context.svelte

@@ -0,0 +1,6 @@
+<script lang="ts">
+import { getContext } from 'svelte';
+const contextValue = getContext('context-key');
+</script>
+
+<div>{contextValue}</div>

tests/components/ct-svelte-vite/tests/render.spec.ts

@@ -1,6 +1,8 @@
 import { test, expect } from '@playwright/experimental-ct-svelte';
+import type { HooksConfig } from 'playwright';
 import Button from '@/components/Button.svelte';
 import Empty from '@/components/Empty.svelte';
+import Context from '@/components/Context.svelte';
 
 test('render props', async ({ mount }) => {
   const component = await mount(Button, {
@@ -17,3 +19,12 @@ test('get textContent of the empty component', async ({ mount }) => {
   expect(await component.textContent()).toBe('');
   await expect(component).toHaveText('');
 });
+
+test('render context', async ({ mount }) => {
+  const component = await mount<HooksConfig>(Context, {
+    hooksConfig: {
+      context: 'context-value',
+    }
+  });
+  await expect(component).toContainText('context-value');
+});