fix(replay-ui): the selector key list comes from the cross-runtime contract

The hand-copied list carried textPrefix and classPrefix, which are not keys any
runtime emits, and omitted testTag, data-testid, identifier and
accessibilityIdentifier. testTag is the primary Android identification route,
so the most common action rendered as raw text. Importing
pkg/spec/test/fixtures/selector-keys.json leaves no second copy to drift.

replay-ui/src/__tests__/action-format.test.ts

@@ -1,5 +1,7 @@
 import { describe, it, expect } from "bun:test";
+import { readFileSync } from "node:fs";
 import {
+  SELECTOR_KEYS,
   formatActionRow,
   formatElapsed,
   parseSelector,
@@ -7,6 +9,34 @@ import {
 } from "../lib/action-format";
 import { summary } from "./fixtures";
 
+const contractPath = new URL(
+  "../../../pkg/spec/test/fixtures/selector-keys.json",
+  import.meta.url,
+);
+const contract: { keys: string[] } = JSON.parse(
+  readFileSync(contractPath, "utf8"),
+);
+
+// The runtimes reject a selector key they do not know, so the key list the UI
+// reads rows against has to be the same list. A key the UI omits renders a real
+// action as raw text; a key only the UI carries formats a selector no runtime
+// could ever emit. internal/hierarchy/selector_keys_test.go and
+// pkg/spec/test/selector-keys.test.ts assert the SAME file.
+describe("selector keys", () => {
+  it("is the cross-runtime list", () => {
+    expect([...SELECTOR_KEYS]).toEqual(contract.keys);
+  });
+
+  it("parses every key the runtimes accept", () => {
+    for (const key of contract.keys) {
+      expect(parseSelector(`${key}:value`)).toEqual({
+        kind: key,
+        value: "value",
+      });
+    }
+  });
+});
+
 // Bug class: selector parsing mislabels every action row. Splitting on the
 // wrong colon, treating a value-with-colon as the kind, or dropping the prefix
 // ellipsis would render the wrong target tag for every step.
@@ -14,13 +44,31 @@ describe("parseSelector", () => {
   const cases: { input: string; out: ReturnType<typeof parseSelector> }[] = [
     { input: "id:login", out: { kind: "id", value: "login" } },
     { input: "text:Sign In", out: { kind: "text", value: "Sign In" } },
-    { input: "textPrefix:Hello", out: { kind: "textPrefix", value: "Hello" } },
+    {
+      input: "testTag:AccountCard",
+      out: { kind: "testTag", value: "AccountCard" },
+    },
+    {
+      input: "data-testid:ledger-row",
+      out: { kind: "data-testid", value: "ledger-row" },
+    },
+    {
+      input: "accessibilityIdentifier:pay_now",
+      out: { kind: "accessibilityIdentifier", value: "pay_now" },
+    },
+    {
+      input: "identifier:pay_now",
+      out: { kind: "identifier", value: "pay_now" },
+    },
+    { input: "descPrefix:Hello", out: { kind: "descPrefix", value: "Hello" } },
     {
       input: "idPrefix:customer_row_",
       out: { kind: "idPrefix", value: "customer_row_" },
     },
     { input: "id:com.app:id/btn", out: { kind: "id", value: "com.app:id/btn" } },
     { input: "bogus:x", out: null },
+    { input: "textPrefix:Hello", out: null },
+    { input: "classPrefix:android.widget", out: null },
     { input: ":leading", out: null },
     { input: "no-colon", out: null },
   ];
@@ -33,9 +81,10 @@ describe("parseSelector", () => {
 
 describe("tagFromSelector", () => {
   it("appends ellipsis only for prefix selectors", () => {
-    expect(tagFromSelector("textPrefix:Hel")).toBe("Hel...");
+    expect(tagFromSelector("descPrefix:Hel")).toBe("Hel...");
     expect(tagFromSelector("idPrefix:customer_row_")).toBe("customer_row_...");
     expect(tagFromSelector("text:Hello")).toBe("Hello");
+    expect(tagFromSelector("testTag:AccountCard")).toBe("AccountCard");
     expect(tagFromSelector("plain")).toBe("plain");
   });
 });
@@ -63,6 +112,30 @@ describe("formatActionRow", () => {
     ).toEqual({ verb: "Click", target: "(10, 20)", targetIsTag: false });
   });
 
+  // internal/verifier/worker.go labels android and ios taps with testTag,
+  // identifier and accessibilityIdentifier; pkg/spec/src/web-runtime.ts labels
+  // web taps with data-testid. testTag is the commonest label of the four.
+  it("formats the selector keys the verifier and the web runtime actually emit", () => {
+    expect(
+      formatActionRow(
+        summary({ action_kind: "Tap", action_label: "testTag:AccountCard" }),
+      ),
+    ).toEqual({ verb: "Click", target: "AccountCard", targetIsTag: true });
+    expect(
+      formatActionRow(
+        summary({ action_kind: "Tap", action_label: "data-testid:ledger-row" }),
+      ),
+    ).toEqual({ verb: "Click", target: "ledger-row", targetIsTag: true });
+    expect(
+      formatActionRow(
+        summary({
+          action_kind: "Tap",
+          action_label: "accessibilityIdentifier:pay_now",
+        }),
+      ),
+    ).toEqual({ verb: "Click", target: "pay_now", targetIsTag: true });
+  });
+
   it("maps known verbs and falls back to the raw kind", () => {
     expect(formatActionRow(summary({ action_kind: "InputText", action_label: "hi" })).verb).toBe("Type");
     expect(formatActionRow(summary({ action_kind: "Swipe" })).verb).toBe("Swipe");

replay-ui/src/lib/action-format.ts

@@ -1,3 +1,4 @@
+import selectorKeysContract from "../../../pkg/spec/test/fixtures/selector-keys.json";
 import type { StepSummary } from "../types";
 
 export interface FormattedRow {
@@ -6,17 +7,10 @@ export interface FormattedRow {
   targetIsTag: boolean;
 }
 
-const SELECTOR_PREFIXES = [
-  "id",
-  "idPrefix",
-  "text",
-  "textPrefix",
-  "desc",
-  "descPrefix",
-  "class",
-  "classPrefix",
-  "package",
-];
+// Imported from the cross-runtime contract rather than restated, because a
+// copy here goes stale silently: an unlisted key renders a real action as raw
+// text instead of a formatted row, and nothing fails to tell anyone.
+export const SELECTOR_KEYS: readonly string[] = selectorKeysContract.keys;
 
 export function parseSelector(
   selector: string,
@@ -27,7 +21,7 @@ export function parseSelector(
   }
   const kind = selector.slice(0, colonIndex);
   const value = selector.slice(colonIndex + 1);
-  if (!SELECTOR_PREFIXES.includes(kind)) {
+  if (!SELECTOR_KEYS.includes(kind)) {
     return null;
   }
   return { kind, value };