content: /*
   * Copyright 2016 Google Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.google.android.things.contrib.driver.apa102;
  
  import static org.junit.Assert.assertArrayEquals;
  import static org.junit.Assert.assertEquals;
  import static org.mockito.Mockito.times;
  
  import android.graphics.Color;
  
  import com.google.android.things.contrib.driver.apa102.Apa102.Mode;
  import com.google.android.things.pio.SpiDevice;
  
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  import org.junit.runner.RunWith;
  import org.mockito.Mock;
  import org.mockito.Mockito;
  import org.mockito.junit.MockitoJUnit;
  import org.mockito.junit.MockitoRule;
  import org.powermock.core.classloader.annotations.PrepareForTest;
  import org.powermock.modules.junit4.PowerMockRunner;
  
  import java.io.IOException;
  
  @RunWith(PowerMockRunner.class)
  @PrepareForTest(android.graphics.Color.class)
  public class Apa102Test {
  
      @Mock
      SpiDevice mSpiDevice;
  
      @Rule
      public MockitoRule mMockitoRule = MockitoJUnit.rule();
  
      @Rule
      public ExpectedException mExpectedException = ExpectedException.none();
  
      @Test
      public void close() throws IOException {
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          leds.close();
          Mockito.verify(mSpiDevice).close();
      }
  
      @Test
      public void close_safeToCallTwice() throws IOException {
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          leds.close();
          leds.close(); // should not throw
          Mockito.verify(mSpiDevice, times(1)).close();
      }
  
      @Test
      public void setBrightness() throws IOException {
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          final int brightness = 10;
          leds.setBrightness(brightness);
          assertEquals(brightness, leds.getBrightness());
      }
  
      @Test
      public void setBrightness_throwsIfTooSmall() throws IOException {
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          mExpectedException.expect(IllegalArgumentException.class);
          leds.setBrightness(-1);
      }
  
      @Test
      public void setBrightness_throwsIfTooLarge() throws IOException {
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          mExpectedException.expect(IllegalArgumentException.class);
          leds.setBrightness(Apa102.MAX_BRIGHTNESS + 1);
      }
  
      @Test
      public void setDirection() throws IOException {
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          leds.setDirection(Apa102.Direction.REVERSED);
          assertEquals(Apa102.Direction.REVERSED, leds.getDirection());
      }
  
      @Test
      public void setDirection_allowsChangeOfDirection() throws IOException {
          ColorMock.mockStatic();
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          final int brightness = 15;
          leds.setBrightness(brightness);
          final int[] colors = {0xff0000, 0x00ff00, 0x0000ff};
          leds.write(colors);
          int headerSize = 4;
          int resetframeSize = 4;
          int endframeSize = 4;
          Mockito.verify(mSpiDevice).write(Mockito.argThat(BytesMatcher.contains(
                  (byte)(0xE0|brightness),
                  (byte)(colors[0]&0xff), (byte)(colors[0]>>8&0xff), (byte)(colors[0]>>16&0xff),
                  (byte)(0xE0|brightness),
                  (byte)(colors[1]&0xff), (byte)(colors[1]>>8&0xff), (byte)(colors[1]>>16&0xff),
                  (byte)(0xE0|brightness),
                  (byte)(colors[2]&0xff), (byte)(colors[2]>>8&0xff), (byte)(colors[2]>>16&0xff)
          )), Mockito.eq(headerSize + colors.length*4 + resetframeSize + endframeSize));
  
          leds.setDirection(Apa102.Direction.REVERSED);
  
          leds.write(colors);
          Mockito.verify(mSpiDevice, times(2)).write(Mockito.argThat(BytesMatcher.contains(
                  (byte)(0xE0|brightness),
                  (byte)(colors[2]&0xff), (byte)(colors[2]>>8&0xff), (byte)(colors[2]>>16&0xff),
                  (byte)(0xE0|brightness),
                  (byte)(colors[1]&0xff), (byte)(colors[1]>>8&0xff), (byte)(colors[1]>>16&0xff),
                  (byte)(0xE0|brightness),
                  (byte)(colors[0]&0xff), (byte)(colors[0]>>8&0xff), (byte)(colors[0]>>16&0xff)
          )), Mockito.eq(headerSize + colors.length*4 + resetframeSize + endframeSize));
      }
  
      @Test
      public void write() throws IOException {
          ColorMock.mockStatic();
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          final int brightness = 15;
          leds.setBrightness(brightness);
          final int[] colors = {0xff0000, 0x00ff00, 0x0000ff};
          leds.write(colors);
          int headerSize = 4;
          int resetframeSize = 4;
          int endframeSize = 4;
          Mockito.verify(mSpiDevice).write(Mockito.argThat(BytesMatcher.contains(
                  (byte)(0xE0|brightness),
                  (byte)(colors[0]&0xff), (byte)(colors[0]>>8&0xff), (byte)(colors[0]>>16&0xff),
                  (byte)(0xE0|brightness),
                  (byte)(colors[1]&0xff), (byte)(colors[1]>>8&0xff), (byte)(colors[1]>>16&0xff),
                  (byte)(0xE0|brightness),
                  (byte)(colors[2]&0xff), (byte)(colors[2]>>8&0xff), (byte)(colors[2]>>16&0xff)
          )), Mockito.eq(headerSize + colors.length*4 + resetframeSize + endframeSize));
      }
  
      @Test
      public void write_reversed() throws IOException {
          ColorMock.mockStatic();
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.REVERSED);
          final int brightness = 15;
          leds.setBrightness(brightness);
          final int[] colors = {0xff0000, 0x00ff00, 0x0000ff};
          leds.write(colors);
          int headerSize = 4;
          int resetframeSize = 4;
          int endframeSize = 4;
          Mockito.verify(mSpiDevice).write(Mockito.argThat(BytesMatcher.contains(
                  (byte)(0xE0|brightness),
                  (byte)(colors[2]&0xff), (byte)(colors[2]>>8&0xff), (byte)(colors[2]>>16&0xff),
                  (byte)(0xE0|brightness),
                  (byte)(colors[1]&0xff), (byte)(colors[1]>>8&0xff), (byte)(colors[1]>>16&0xff),
                  (byte)(0xE0|brightness),
                  (byte)(colors[0]&0xff), (byte)(colors[0]>>8&0xff), (byte)(colors[0]>>16&0xff)
          )), Mockito.eq(headerSize + colors.length*4 + resetframeSize + endframeSize));
      }
  
      @Test
      public void write_throwsIfClosed() throws IOException {
          Apa102 leds = new Apa102(mSpiDevice, Apa102.Mode.BGR, Apa102.Direction.NORMAL);
          leds.close();
          mExpectedException.expect(IllegalStateException.class);
          leds.write(new int[] {0xff0000, 0x00ff00, 0x0000ff});
      }
  
      @Test
      public void copyApaColorData() {
          ColorMock.mockStatic();
  
          final byte brightness = 15;
          final byte r = (byte) 0x33;
          final byte g = (byte) 0xB5;
          final byte b = (byte) 0xE5;
          // #HOLOYOLO
          final int color = Color.argb(0xFF, r & 0xFF, g & 0xFF, b & 0xFF); // suppress sign extension
  
          final byte[] dest = new byte[4];
          Apa102.copyApaColorData(brightness, color, Mode.BGR, dest, 0);
          assertArrayEquals(new byte[]{brightness, b, g, r}, dest);
          Apa102.copyApaColorData(brightness, color, Mode.BRG, dest, 0);
          assertArrayEquals(new byte[]{brightness, b, r, g}, dest);
          Apa102.copyApaColorData(brightness, color, Mode.GBR, dest, 0);
          assertArrayEquals(new byte[]{brightness, g, b, r}, dest);
          Apa102.copyApaColorData(brightness, color, Mode.GRB, dest, 0);
          assertArrayEquals(new byte[]{brightness, g, r, b}, dest);
          Apa102.copyApaColorData(brightness, color, Mode.RBG, dest, 0);
          assertArrayEquals(new byte[]{brightness, r, b, g}, dest);
          Apa102.copyApaColorData(brightness, color, Mode.RGB, dest, 0);
          assertArrayEquals(new byte[]{brightness, r, g, b}, dest);
      }
  
      @Test
      public void copyApaColorData_throwsIfNullArray() {
          mExpectedException.expect(IllegalArgumentException.class);
          Apa102.copyApaColorData((byte) 0, 0, Mode.BGR, null, 0);
      }
  
      @Test
      public void copyApaColorData_throwsIfArrayTooSmall() {
          mExpectedException.expect(IllegalArgumentException.class);
          Apa102.copyApaColorData((byte) 0, 0, Mode.BGR, new byte[3], 0);
      }
  }
  