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package org.robolectric.shadows;
import static android.os.Build.VERSION_CODES.LOLLIPOP;
import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.junit.Assert.assertThrows;
import static org.mockito.Mockito.when;
import static org.robolectric.Shadows.shadowOf;
import android.content.Context;
import android.hardware.usb.UsbConfiguration;
import android.hardware.usb.UsbConstants;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbDeviceConnection;
import android.hardware.usb.UsbEndpoint;
import android.hardware.usb.UsbInterface;
import android.hardware.usb.UsbManager;
import androidx.annotation.Nullable;
import androidx.test.core.app.ApplicationProvider;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.robolectric.annotation.Config;
/** Unit tests for {@link ShadowUsbDeviceConnection}. */
@RunWith(AndroidJUnit4.class)
public class ShadowUsbDeviceConnectionTest {
private static final String DEVICE_NAME = "usb";
private UsbManager usbManager;
@Mock private UsbDevice usbDevice;
@Mock private UsbConfiguration usbConfiguration;
@Mock private UsbInterface usbInterface;
@Before
public void setUp() {
MockitoAnnotations.initMocks(this);
usbManager =
(UsbManager)
ApplicationProvider.getApplicationContext().getSystemService(Context.USB_SERVICE);
when(usbDevice.getDeviceName()).thenReturn(DEVICE_NAME);
when(usbDevice.getConfigurationCount()).thenReturn(1);
when(usbDevice.getConfiguration(0)).thenReturn(usbConfiguration);
when(usbConfiguration.getInterfaceCount()).thenReturn(1);
when(usbConfiguration.getInterface(0)).thenReturn(usbInterface);
}
@Test
@Config(minSdk = LOLLIPOP)
public void claimInterface() {
UsbDeviceConnection usbDeviceConnection = usbManager.openDevice(usbDevice);
UsbInterface usbInterface = selectInterface(usbDevice);
assertThat(usbDeviceConnection.claimInterface(usbInterface, /* force= */ false)).isTrue();
assertThat(usbDeviceConnection.releaseInterface(usbInterface)).isTrue();
}
@Test
@Config(minSdk = LOLLIPOP)
public void setInterface() {
UsbDeviceConnection usbDeviceConnection = usbManager.openDevice(usbDevice);
UsbInterface usbInterface = selectInterface(usbDevice);
assertThat(usbDeviceConnection.setInterface(usbInterface)).isTrue();
}
@Test
@Config(minSdk = LOLLIPOP)
public void controlTransfer() {
UsbDeviceConnection usbDeviceConnection = usbManager.openDevice(usbDevice);
UsbInterface usbInterface = selectInterface(usbDevice);
usbDeviceConnection.claimInterface(usbInterface, /* force= */ false);
int len = 10;
assertThat(
usbDeviceConnection.controlTransfer(
/* requestType= */ 0,
/* request= */ 0,
/* value= */ 0,
/* index= */ 0,
/* buffer= */ new byte[len],
/* length= */ len,
/* timeout= */ 0))
.isEqualTo(len);
assertThat(
usbDeviceConnection.controlTransfer(
/* requestType= */ 0,
/* request= */ 0,
/* value= */ 0,
/* index= */ 0,
/* buffer= */ new byte[len],
/* offset= */ 0,
/* length= */ len,
/* timeout= */ 0))
.isEqualTo(len);
}
@Test
@Config(minSdk = LOLLIPOP)
public void bulkTransfer() throws Exception {
UsbDeviceConnection usbDeviceConnection = usbManager.openDevice(usbDevice);
UsbInterface usbInterface = selectInterface(usbDevice);
UsbEndpoint usbEndpointOut = getEndpoint(usbInterface, UsbConstants.USB_DIR_OUT);
usbDeviceConnection.claimInterface(usbInterface, /* force= */ false);
InputStream outgoingData = shadowOf(usbDeviceConnection).getOutgoingDataStream();
byte[] msg = "Hello World".getBytes(UTF_8);
assertThat(usbDeviceConnection.bulkTransfer(usbEndpointOut, msg, msg.length, /* timeout= */ 0))
.isEqualTo(msg.length);
byte[] buffer = new byte[1024];
int read = outgoingData.read(buffer);
assertThat(Arrays.copyOf(buffer, read)).isEqualTo(msg);
msg = "Goodbye World".getBytes(UTF_8);
assertThat(
usbDeviceConnection.bulkTransfer(
usbEndpointOut, msg, /* offset= */ 0, msg.length, /* timeout= */ 0))
.isEqualTo(msg.length);
buffer = new byte[1024];
read = outgoingData.read(buffer);
assertThat(Arrays.copyOf(buffer, read)).isEqualTo(msg);
}
@Test
@Config(minSdk = LOLLIPOP)
public void releaseInterface_closesOutgoingDataStream() throws Exception {
UsbDeviceConnection usbDeviceConnection = usbManager.openDevice(usbDevice);
UsbInterface usbInterface = selectInterface(usbDevice);
UsbEndpoint usbEndpointOut = getEndpoint(usbInterface, UsbConstants.USB_DIR_OUT);
usbDeviceConnection.claimInterface(usbInterface, /* force= */ false);
InputStream outgoingData = shadowOf(usbDeviceConnection).getOutgoingDataStream();
byte[] msg = "Hello World".getBytes(UTF_8);
assertThat(usbDeviceConnection.bulkTransfer(usbEndpointOut, msg, msg.length, /* timeout= */ 0))
.isEqualTo(msg.length);
usbDeviceConnection.releaseInterface(usbInterface);
byte[] buffer = new byte[1024];
assertThrows(IOException.class, () -> outgoingData.read(buffer));
}
@Nullable
private static UsbInterface selectInterface(UsbDevice device) {
for (int i = 0; i < device.getConfigurationCount(); i++) {
UsbConfiguration configuration = device.getConfiguration(i);
for (int j = 0; j < configuration.getInterfaceCount(); j++) {
return configuration.getInterface(i);
}
}
return null;
}
@Nullable
private static UsbEndpoint getEndpoint(UsbInterface usbInterface, int direction) {
for (int i = 0; i < usbInterface.getEndpointCount(); i++) {
UsbEndpoint endpoint = usbInterface.getEndpoint(i);
if (endpoint.getDirection() == direction) {
return endpoint;
}
}
return null;
}
}
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