it("should login successfully", async () => { await element(by.id("email")).typeText("user@example.com"); await element(by.id("password")).typeText("password123"); await element(by.id("login-button")).tap(); await expect(element(by.text("Welcome"))).toBeVisible(); }); });


## Core Concepts

### Matchers

```typescript
// By ID (recommended)
element(by.id("button"));

// By text
element(by.text("Submit"));

// By label (accessibility)
element(by.label("Close"));

// Nested
element(by.id("list")).atIndex(0);

Actions

await element(by.id("input")).typeText("Hello");
await element(by.id("input")).clearText();
await element(by.id("button")).tap();
await element(by.id("button")).longPress();
await element(by.id("scroll")).scroll(200, "down");
await element(by.id("refresh")).swipe("down");

Expectations

await expect(element(by.id("title"))).toBeVisible();
await expect(element(by.id("title"))).toHaveText("Hello");
await expect(element(by.id("input"))).toHaveFocus();
await expect(element(by.id("modal"))).not.toExist();

Best Practices

Do: Use testID props, reset state between tests Don't: Use platform-specific selectors, rely on timing

References

Detox Documentation

detox

Detox

When to Use

Quick Start

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