playwright/docs/src/writing-tests-java.md

---
id: writing-tests
title: "Writing Tests"
---

Playwright assertions are created specifically for the dynamic web. Checks are automatically retried until the necessary conditions are met. Playwright comes with [auto-wait](./actionability.md) built in meaning it waits for elements to be actionable prior to performing actions. Playwright provides [assertThat](./test-assertions.md) overloads to write assertions.

Take a look at the example test below to see how to write a test using web first assertions, locators and selectors.

```java
package org.example;

import java.util.regex.Pattern;
import com.microsoft.playwright.*;

import static com.microsoft.playwright.assertions.PlaywrightAssertions.assertThat;

public class App {
    public static void main(String[] args) {
        try (Playwright playwright = Playwright.create()) {
            Browser browser = playwright.chromium().launch();
            Page page = browser.newPage();
            page.navigate("http://playwright.dev");

            // Expect a title "to contain" a substring.
            assertThat(page).hasTitle(Pattern.compile("Playwright"));

            // create a locator
            Locator getStarted = page.locator("text=Get Started");

            // Expect an attribute "to be strictly equal" to the value.
            assertThat(getStarted).hasAttribute("href", "/docs/intro");

            // Click the get started link.
            getStarted.click();

            // Expects the URL to contain intro.
            assertThat(page).hasURL(Pattern.compile(".*intro"));
        }
    }
}
```


### Assertions

Playwright provides [`assertThat`](./test-assertions.md) overloads which will wait until the expected condition is met.

```java
import java.util.regex.Pattern;
import static com.microsoft.playwright.assertions.PlaywrightAssertions.assertThat;

assertThat(page).hasTitle(Pattern.compile("Playwright"));
```


### Locators

[Locators](./locators.md) are the central piece of Playwright's auto-waiting and retry-ability. Locators represent a way to find element(s) on the page at any moment and are used to perform actions on elements such as `.click` `.fill` etc. Custom locators can be created with the [`method: Page.locator`] method.

```java
import static com.microsoft.playwright.assertions.PlaywrightAssertions.assertThat;

Locator getStarted = page.locator("text=Get Started");

assertThat(getStarted).hasAttribute("href", "/docs/intro");
getStarted.click();
```

[Selectors](./selectors.md) are strings that are used to create Locators. Playwright supports many different selectors like [Text](./selectors.md#text-selector), [CSS](./selectors.md#css-selector), [XPath](./selectors.md#xpath-selectors) and many more. Learn more about available selectors and how to pick one in this [in-depth guide](./selectors.md).


```java
import static com.microsoft.playwright.assertions.PlaywrightAssertions.assertThat;

assertThat(page.locator("text=Installation")).isVisible();
```


### Test Isolation

Playwright has the concept of a [BrowserContext] which is an in-memory isolated browser profile. It's recommended to create a new [BrowserContext] for each test to ensure they don't interfere with each other.

```java
Browser browser = playwright.chromium().launch();
BrowserContext context = browser.newContext();
Page page = context.newPage();
```

## What's Next

- [Run single test, multiple tests, headed mode](./running-tests.md)
- [Generate tests with Codegen](./codegen.md)
- [See a trace of your tests](./trace-viewer-intro.md)