feat(material/schematics): add slider styles migrator and tests

src/material/schematics/ng-generate/mdc-migration/rules/components/slider/slider-styles.spec.ts

@@ -0,0 +1,151 @@
+import {createTestApp, patchDevkitTreeToExposeTypeScript} from '@angular/cdk/schematics/testing';
+import {SchematicTestRunner, UnitTestTree} from '@angular-devkit/schematics/testing';
+import {createNewTestRunner, migrateComponent, THEME_FILE} from '../test-setup-helper';
+
+describe('slider styles', () => {
+  let runner: SchematicTestRunner;
+  let cliAppTree: UnitTestTree;
+
+  async function runMigrationTest(oldFileContent: string, newFileContent: string) {
+    cliAppTree.create(THEME_FILE, oldFileContent);
+    const tree = await migrateComponent('slider', runner, cliAppTree);
+    expect(tree.readContent(THEME_FILE)).toBe(newFileContent);
+  }
+
+  beforeEach(async () => {
+    runner = createNewTestRunner();
+    cliAppTree = patchDevkitTreeToExposeTypeScript(await createTestApp(runner));
+  });
+
+  describe('mixin migrations', () => {
+    it('should replace the old theme with the new ones', async () => {
+      await runMigrationTest(
+        `
+        @use '@angular/material' as mat;
+        $theme: ();
+        @include mat.slider-theme($theme);
+      `,
+        `
+        @use '@angular/material' as mat;
+        $theme: ();
+        @include mat.mdc-slider-theme($theme);
+        @include mat.mdc-slider-typography($theme);
+      `,
+      );
+    });
+
+    it('should use the correct namespace', async () => {
+      await runMigrationTest(
+        `
+        @use '@angular/material' as arbitrary;
+        $theme: ();
+        @include arbitrary.slider-theme($theme);
+      `,
+        `
+        @use '@angular/material' as arbitrary;
+        $theme: ();
+        @include arbitrary.mdc-slider-theme($theme);
+        @include arbitrary.mdc-slider-typography($theme);
+      `,
+      );
+    });
+
+    it('should handle updating multiple themes', async () => {
+      await runMigrationTest(
+        `
+        @use '@angular/material' as mat;
+        $light-theme: ();
+        $dark-theme: ();
+        @include mat.slider-theme($light-theme);
+        @include mat.slider-theme($dark-theme);
+      `,
+        `
+        @use '@angular/material' as mat;
+        $light-theme: ();
+        $dark-theme: ();
+        @include mat.mdc-slider-theme($light-theme);
+        @include mat.mdc-slider-typography($light-theme);
+        @include mat.mdc-slider-theme($dark-theme);
+        @include mat.mdc-slider-typography($dark-theme);
+      `,
+      );
+    });
+
+    it('should preserve whitespace', async () => {
+      await runMigrationTest(
+        `
+        @use '@angular/material' as mat;
+        $theme: ();
+
+
+        @include mat.slider-theme($theme);
+
+
+      `,
+        `
+        @use '@angular/material' as mat;
+        $theme: ();
+
+
+        @include mat.mdc-slider-theme($theme);
+        @include mat.mdc-slider-typography($theme);
+
+
+      `,
+      );
+    });
+  });
+
+  describe('selector migrations', () => {
+    it('should update the legacy mat-slider classname', async () => {
+      await runMigrationTest(
+        `
+        .mat-slider {
+          width: 100%;
+        }
+      `,
+        `
+        .mat-mdc-slider {
+          width: 100%;
+        }
+      `,
+      );
+    });
+
+    it('should add comment for potentially deprecated multi-line selector', async () => {
+      await runMigrationTest(
+        `
+        .some-class
+        .mat-slider-thumb {
+          height: 16px;
+        }
+      `,
+        `
+        /* TODO: The following rule targets internal classes of slider that may no longer apply for the MDC version. */
+
+        .some-class
+        .mat-slider-thumb {
+          height: 16px;
+        }
+      `,
+      );
+    });
+
+    it('should update the legacy mat-slider class and add comment for potentially deprecated selector', async () => {
+      await runMigrationTest(
+        `
+        .mat-slider.some-class, .mat-slider-thumb {
+          background-color: transparent;
+        }
+      `,
+        `
+        /* TODO: The following rule targets internal classes of slider that may no longer apply for the MDC version. */
+
+        .mat-mdc-slider.some-class, .mat-slider-thumb {
+          background-color: transparent;
+        }
+      `,
+      );
+    });
+  });
+});

src/material/schematics/ng-generate/mdc-migration/rules/components/slider/slider-styles.ts

@@ -0,0 +1,24 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {ClassNameChange, StyleMigrator} from '../../style-migrator';
+
+export class SliderStylesMigrator extends StyleMigrator {
+  component = 'slider';
+
+  deprecatedPrefix = 'mat-slider';
+
+  mixinChanges = [
+    {
+      old: 'slider-theme',
+      new: ['mdc-slider-theme', 'mdc-slider-typography'],
+    },
+  ];
+
+  classChanges: ClassNameChange[] = [{old: '.mat-slider', new: '.mat-mdc-slider'}];
+}

src/material/schematics/ng-generate/mdc-migration/rules/index.ts

@@ -11,6 +11,7 @@ import {CheckboxStylesMigrator} from './components/checkbox/checkbox-styles';
 import {ProgressBarStylesMigrator} from './components/progress-bar/progress-bar-styles';
 import {RadioStylesMigrator} from './components/radio/radio-styles';
 import {SlideToggleStylesMigrator} from './components/slide-toggle/slide-toggle-styles';
+import {SliderStylesMigrator} from './components/slider/slider-styles';
 import {StyleMigrator} from './style-migrator';
 
 export const MIGRATORS: StyleMigrator[] = [
@@ -19,4 +20,5 @@ export const MIGRATORS: StyleMigrator[] = [
   new ProgressBarStylesMigrator(),
   new RadioStylesMigrator(),
   new SlideToggleStylesMigrator(),
+  new SliderStylesMigrator(),
 ];