### Clone Repository and Setup

Source: https://github.com/android/testing-samples/blob/main/README.md

Clone the repository and set up the Bazel environment by editing the WORKSPACE file to point to your local SDK.

```bash
# Clone the repository if you haven't.
$ git clone https://github.com/google/android-testing
$ cd android-testing

# Edit the path to your local SDK at the top of the WORKSPACE file
$ $EDITOR WORKSPACE
```

--------------------------------

### Uninstall Test Packages from Local Device

Source: https://github.com/android/testing-samples/blob/main/README.md

Manually uninstall test packages from a local device or emulator after testing, as they are not automatically removed. This command lists and uninstalls packages starting with 'com.example.android.testing'.

```bash
# adb shell pm list packages com.example.android.testing | cut -d ':' -f 2 | tr -d '
' | xargs -L1 -t adb uninstall
```

--------------------------------

### CMakeLists.txt Configuration

Source: https://github.com/android/testing-samples/blob/main/unit/BasicNativeAndroidTest/app/src/main/cpp/CMakeLists.txt

Sets up the minimum CMake version, project name, and finds necessary packages like Googletest and JUnit-GTest. Include directories are specified for header files.

```cmake
cmake_minimum_required(VERSION 3.10.2)

project(junit-gtest-example LANGUAGES CXX)

find_package(googletest REQUIRED CONFIG)
find_package(junit-gtest REQUIRED CONFIG)

include_directories(include)
```

--------------------------------

### Run Unit Tests with Gradle

Source: https://github.com/android/testing-samples/blob/main/unit/BasicSample/README.md

Execute all unit tests for the project using the Gradle wrapper script. A successful run will output a 'BUILD SUCCESSFUL' message.

```bash
./gradlew test
```

--------------------------------

### Test on a Local Device or Emulator

Source: https://github.com/android/testing-samples/blob/main/README.md

Run tests on a connected local device or emulator. Ensure the device is listed by `adb devices` before executing.

```bash
# Test with a local device or emulator. Ensure that `adb devices` lists the device.
$ bazel test //... --config=local_device
```

--------------------------------

### Run All Tests with GUI Enabled

Source: https://github.com/android/testing-samples/blob/main/README.md

Execute all tests with the GUI configuration enabled. This is typically used when visual feedback or interaction is required during testing.

```bash
# Test everything with GUI enabled
$ bazel test //... --config=gui
```

--------------------------------

### Run All Tests in Headless Mode

Source: https://github.com/android/testing-samples/blob/main/README.md

Execute all tests in a headless mode, which does not require a graphical display. This is useful for CI environments.

```bash
# Test everything in a headless mode (no graphical display)
$ bazel test //... --config=headless
```

--------------------------------

### Add Native Libraries

Source: https://github.com/android/testing-samples/blob/main/unit/BasicNativeAndroidTest/app/src/main/cpp/CMakeLists.txt

Defines shared libraries for the main application logic ('adder') and its tests ('adder-test'). The 'adder' library is built from src/adder.cpp, and the 'adder-test' library from test/adder_test.cpp.

```cmake
add_library(adder SHARED src/adder.cpp)
```

```cmake
add_library(adder-test SHARED test/adder_test.cpp)
```

--------------------------------

### Test a Single Instrumentation Test

Source: https://github.com/android/testing-samples/blob/main/README.md

Run a specific instrumentation test, identified by its Bazel target and configuration. Ensure to use the --config=headless option for headless execution.

```bash
# Test a single test, e.g. ui/espresso/BasicSample/BUILD.bazel
$ bazel test //ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_21_x86 --config=headless
```

--------------------------------

### Query for Android Instrumentation Test Targets

Source: https://github.com/android/testing-samples/blob/main/README.md

Use Bazel's query command to find all targets of type android_instrumentation_test within the repository. This helps in identifying available tests.

```bash
# Query for all android_instrumentation_test targets
$ bazel query 'kind(android_instrumentation_test, //...)'
//ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_23_x86
//ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_22_x86
//ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_21_x86
//ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_19_x86
//ui/espresso/RecyclerViewSample:RecyclerViewSampleInstrumentationTest_23_x86
//ui/espresso/RecyclerViewSample:RecyclerViewSampleInstrumentationTest_22_x86
//ui/espresso/RecyclerViewSample:RecyclerViewSampleInstrumentationTest_21_x86
//ui/espresso/RecyclerViewSample:RecyclerViewSampleInstrumentationTest_19_x86
//ui/espresso/MultiWindowSample:MultiWindowSampleInstrumentationTest_23_x86
//ui/espresso/MultiWindowSample:MultiWindowSampleInstrumentationTest_22_x86
...
```

--------------------------------

### Link Test Library with Dependencies

Source: https://github.com/android/testing-samples/blob/main/unit/BasicNativeAndroidTest/app/src/main/cpp/CMakeLists.txt

Links the 'adder-test' library with its dependencies: the 'adder' library, Googletest, and JUnit-GTest. This ensures that the test library can access the functionality of the main library and the testing frameworks.

```cmake
target_link_libraries(adder-test
        PRIVATE
        adder
        googletest::gtest
        junit-gtest::junit-gtest
)
```

--------------------------------

### HTML and CSS for Web Form

Source: https://github.com/android/testing-samples/blob/main/ui/espresso/WebBasicSample/app/src/main/assets/web_form_response.html

Basic HTML structure and CSS for styling the web form response page. Includes responsive design adjustments for smaller screens.

```html
body {
  background-color: #f0f0f2;
  margin: 0;
  padding: 0;
  font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

div {
  width: 600px;
  margin: 5em auto;
  padding: 50px;
  background-color: #fff;
  border-radius: 1em;
}

a:link, a:visited {
  color: #38488f;
  text-decoration: none;
}

@media (max-width: 700px) {
  body {
    background-color: #fff;
  }
  div {
    width: auto;
    margin: 0 auto;
    border-radius: 0;
    padding: 1em;
  }
}
```

--------------------------------

### Test on a Specific Local Device

Source: https://github.com/android/testing-samples/blob/main/README.md

When multiple devices are connected, specify the target device serial number using the `--test_arg=--device_serial_number=$identifier` flag.

```bash
# If multiple devices are connected, add --device_serial_number=$identifier where $identifier is the name of the device in `adb devices`
$ bazel test //... --config=local_device --test_arg=--device_serial_number=$identifier
```

--------------------------------

### HTML Structure for Web Form

Source: https://github.com/android/testing-samples/blob/main/ui/espresso/WebBasicSample/app/src/main/assets/web_form.html

Basic HTML structure for a web form with input fields and a display area. This is the content loaded into the WebView.

```html
body {
  background-color: #f0f0f2;
  margin: 0;
  padding: 0;
  font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

div {
  width: 600px;
  margin: 5em auto;
  padding: 50px;
  background-color: #fff;
  border-radius: 1em;
}

#message {
  margin: 0 auto 12px auto;
}

a:link, a:visited {
  color: #38488f;
  text-decoration: none;
}

@media (max-width: 700px) {
  body {
    background-color: #fff;
  }
  div {
    width: auto;
    margin: 0 auto;
    border-radius: 0;
    padding: 1em;
  }
}
```

--------------------------------

### Legacy Support Library Espresso Idling Resource Dependency

Source: https://github.com/android/testing-samples/blob/main/ui/espresso/IdlingResourceSample/README.md

Add this dependency to your app's build.gradle file to use the espresso-idling-resource library with the older Android support libraries.

```gradle
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.android.support.test.espresso:espresso-idling-resource:3.0.2'
```

--------------------------------

### AndroidX Espresso Idling Resource Dependency

Source: https://github.com/android/testing-samples/blob/main/ui/espresso/IdlingResourceSample/README.md

Add this dependency to your app's build.gradle file to use the espresso-idling-resource library with AndroidX.

```gradle
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
implementation 'androidx.test.espresso:espresso-idling-resource:3.1.1'
```

--------------------------------

### JavaScript to Display Form Input

Source: https://github.com/android/testing-samples/blob/main/ui/espresso/WebBasicSample/app/src/main/assets/web_form_response.html

JavaScript code to extract a specific parameter from the URL query string and display it on the page. Assumes the input is the first parameter after a '?' and has a 'name=' prefix.

```javascript
var query = document.location.href.substring(document.location.href.indexOf("?") + 1);
var text_input = query.split("&")[0].split("=")[1];
document.getElementById('response').innerHTML = text_input;
```

--------------------------------

### JavaScript Function to Update Text

Source: https://github.com/android/testing-samples/blob/main/ui/espresso/WebBasicSample/app/src/main/assets/web_form.html

A JavaScript function that reads a value from an input field and updates the content of a message element on the page. This can be called from Espresso.

```javascript
function changeText() {
  var typedText = document.getElementById('text_input').value;
  document.getElementById('message').innerHTML=typedText;
}
```

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