test: add harness tests for RiveLog handler and deprecation warnings

Author: mfazekas

example/__tests__/rivelog.harness.tsx

@@ -0,0 +1,78 @@
+import { describe, it, expect, cleanup } from 'react-native-harness';
+import { RiveFileFactory, RiveLog } from '@rive-app/react-native';
+
+const BOUNCING_BALL = require('../assets/rive/bouncing_ball.riv');
+
+type LogEntry = { level: string; tag: string; message: string };
+
+describe('RiveLog', () => {
+  it('captures deprecation warning from sync method', async () => {
+    const logs: LogEntry[] = [];
+    RiveLog.setHandler((level, tag, message) => {
+      logs.push({ level, tag, message });
+    });
+
+    const file = await RiveFileFactory.fromSource(BOUNCING_BALL, undefined);
+
+    file.defaultArtboardViewModel();
+
+    const deprecation = logs.find((l) => l.tag === 'Deprecation');
+    expect(deprecation).toBeDefined();
+    expect(deprecation!.level).toBe('warn');
+    expect(deprecation!.message).toContain('defaultArtboardViewModel');
+    expect(deprecation!.message).toContain('defaultArtboardViewModelAsync');
+
+    RiveLog.resetHandler();
+    cleanup();
+  });
+
+  it('emits each deprecation only once', async () => {
+    const logs: LogEntry[] = [];
+    RiveLog.setHandler((level, tag, message) => {
+      logs.push({ level, tag, message });
+    });
+
+    const file = await RiveFileFactory.fromSource(BOUNCING_BALL, undefined);
+
+    // Use artboardNames — a different deprecated method so the once-per-session
+    // dedup doesn't collide with the previous test.
+    file.artboardNames;
+    file.artboardNames;
+
+    const deprecations = logs.filter(
+      (l) => l.tag === 'Deprecation' && l.message.includes('artboardNames')
+    );
+    expect(deprecations.length).toBe(1);
+
+    RiveLog.resetHandler();
+    cleanup();
+  });
+
+  it('suppresses all logs with a no-op handler', async () => {
+    const logs: LogEntry[] = [];
+    RiveLog.setHandler(() => {});
+
+    const file = await RiveFileFactory.fromSource(BOUNCING_BALL, undefined);
+
+    file.artboardCount;
+
+    expect(logs.length).toBe(0);
+
+    RiveLog.resetHandler();
+    cleanup();
+  });
+
+  it('resetHandler restores default logging without throwing', async () => {
+    RiveLog.setHandler(() => {});
+    RiveLog.resetHandler();
+
+    const file = await RiveFileFactory.fromSource(BOUNCING_BALL, undefined);
+
+    file.viewModelByName('nonexistent');
+
+    // If we got here without throwing, the default handler works.
+    expect(true).toBe(true);
+
+    cleanup();
+  });
+});