test(back-button): migrate to generators (#27289)

Issue number: N/A

---------

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Back button uses legacy E2E format

## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Back button uses generator format

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->


## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->

core/src/components/back-button/test/basic/back-button.e2e-legacy.ts

@@ -1,12 +0,0 @@
-import { expect } from '@playwright/test';
-import { test } from '@utils/test/playwright';
-
-test.describe('back-button: basic', () => {
-  test('should not have visual regressions', async ({ page }) => {
-    await page.goto(`/src/components/back-button/test/basic`);
-
-    await page.setIonViewport();
-
-    await expect(page).toHaveScreenshot(`back-button-basic-${page.getSnapshotSettings()}.png`);
-  });
-});

core/src/components/back-button/test/basic/back-button.e2e.ts

@@ -0,0 +1,14 @@
+import { expect } from '@playwright/test';
+import { configs, test } from '@utils/test/playwright';
+
+configs().forEach(({ config, screenshot, title }) => {
+  test.describe(title('back-button: basic'), () => {
+    test('should not have visual regressions', async ({ page }) => {
+      await page.goto(`/src/components/back-button/test/basic`, config);
+
+      await page.setIonViewport();
+
+      await expect(page).toHaveScreenshot(screenshot(`back-button-basic`));
+    });
+  });
+});

core/src/components/back-button/test/toolbar/back-button.e2e-legacy.ts

@@ -1,12 +0,0 @@
-import { expect } from '@playwright/test';
-import { test } from '@utils/test/playwright';
-
-test.describe('back-button: toolbar', () => {
-  test('should not have visual regressions', async ({ page }) => {
-    await page.goto(`/src/components/back-button/test/toolbar`);
-
-    await page.setIonViewport();
-
-    await expect(page).toHaveScreenshot(`back-button-toolbar-${page.getSnapshotSettings()}.png`);
-  });
-});

core/src/components/back-button/test/toolbar/back-button.e2e.ts

@@ -0,0 +1,14 @@
+import { expect } from '@playwright/test';
+import { configs, test } from '@utils/test/playwright';
+
+configs().forEach(({ config, screenshot, title }) => {
+  test.describe(title('back-button: toolbar'), () => {
+    test('should not have visual regressions', async ({ page }) => {
+      await page.goto(`/src/components/back-button/test/toolbar`, config);
+
+      await page.setIonViewport();
+
+      await expect(page).toHaveScreenshot(screenshot(`back-button-toolbar`));
+    });
+  });
+});