fix(ivy): special case [style] and [class] bindings for future use (#23232)

PR Close #23232

packages/compiler/test/render3/r3_view_compiler_styling_spec.ts

@@ -0,0 +1,94 @@
+/**
+ * @license
+ * Copyright Google Inc. 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 {MockDirectory, setup} from '../aot/test_util';
+import {compile, expectEmit} from './mock_compile';
+
+describe('compiler compliance: styling', () => {
+  const angularFiles = setup({
+    compileAngular: true,
+    compileAnimations: false,
+    compileCommon: true,
+  });
+
+  describe('[style]', () => {
+    it('should create style instructions on the element', () => {
+      const files = {
+        app: {
+          'spec.ts': `
+                import {Component, NgModule} from '@angular/core';
+
+                @Component({
+                  selector: 'my-component',
+                  template: \`<div [style]="myStyleExp"></div>\`
+                })
+                export class MyComponent {
+                  myStyleExp = [{color:'red'}, {color:'blue', duration:1000}]
+                }
+
+                @NgModule({declarations: [MyComponent]})
+                export class MyModule {}
+            `
+        }
+      };
+
+      const template = `
+          template: function MyComponent_Template(rf: $RenderFlags$, $ctx$: $MyComponent$) {
+            if (rf & 1) {
+              $r3$.ɵE(0, 'div');
+              $r3$.ɵe();
+            }
+            if (rf & 2) {
+              $r3$.ɵs(0,$r3$.ɵb($ctx$.myStyleExp));
+            }
+          }
+          `;
+
+      const result = compile(files, angularFiles);
+      expectEmit(result.source, template, 'Incorrect template');
+    });
+  });
+
+  describe('[class]', () => {
+    it('should create class styling instructions on the element', () => {
+      const files = {
+        app: {
+          'spec.ts': `
+                import {Component, NgModule} from '@angular/core';
+
+                @Component({
+                  selector: 'my-component',
+                  template: \`<div [class]="myClassExp"></div>\`
+                })
+                export class MyComponent {
+                  myClassExp = [{color:'orange'}, {color:'green', duration:1000}]
+                }
+
+                @NgModule({declarations: [MyComponent]})
+                export class MyModule {}
+            `
+        }
+      };
+
+      const template = `
+          template: function MyComponent_Template(rf: $RenderFlags$, $ctx$: $MyComponent$) {
+            if (rf & 1) {
+              $r3$.ɵE(0, 'div');
+              $r3$.ɵe();
+            }
+            if (rf & 2) {
+              $r3$.ɵk(0,$r3$.ɵb($ctx$.myClassExp));
+            }
+          }
+          `;
+
+      const result = compile(files, angularFiles);
+      expectEmit(result.source, template, 'Incorrect template');
+    });
+  });
+});