test(components): add accessibilityState merge regression tests for Input/TextArea

Covers #221's fix (now merged): a caller-supplied accessibilityState
merges with the component's own computed disabled value, with disabled
winning on conflict. One consolidated test per component rather than
separate #217/#220 tests, since they're one fix now.

Verified each test fails against its respective pre-#221 source (Input's
original no-merge-at-all code, TextArea's original caller-wins-on-conflict
code) and passes against the fix.

Author: Chibuzor-Nwemambu

packages/components/src/components/Input/Input.test.tsx

@@ -66,6 +66,19 @@ describe("Input", () => {
         expect(input).toHaveProp("accessibilityState", { disabled: false });
     });
 
+    it("merges a caller-supplied accessibilityState, with the component's own disabled value winning on conflict", () => {
+        render(
+            <Input
+                accessibilityState={{ selected: true, disabled: true }}
+                placeholder="Type here"
+            />
+        );
+        expect(screen.getByPlaceholderText("Type here")).toHaveProp(
+            "accessibilityState",
+            { selected: true, disabled: false }
+        );
+    });
+
     it("calls the user-provided onFocus and onBlur handlers", () => {
         const onFocus = jest.fn();
         const onBlur = jest.fn();

packages/components/src/components/TextArea/TextArea.test.tsx

@@ -86,6 +86,19 @@ describe("TextArea", () => {
         expect(input).toHaveProp("accessibilityState", { disabled: false });
     });
 
+    it("merges a caller-supplied accessibilityState, with the component's own disabled value winning on conflict", () => {
+        render(
+            <TextArea
+                accessibilityState={{ selected: true, disabled: true }}
+                defaultValue="hi"
+            />
+        );
+        expect(screen.getByDisplayValue("hi")).toHaveProp(
+            "accessibilityState",
+            { selected: true, disabled: false }
+        );
+    });
+
     it("defaults accessibilityHint to the joined description and helperMessage", () => {
         render(
             <TextArea