TestUtil (ExoPlayer library)

java.lang.Object
- com.google.android.exoplayer2.testutil.TestUtil

```
public class TestUtil
extends Object
```
Utility methods for tests.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`assertBitmapsAreSimilar(Bitmap expectedBitmap, Bitmap actualBitmap, double psnrThresholdDb)`	Asserts whether actual bitmap is very similar to the expected bitmap at some quality level.
`static void`	`assertBufferInfosEqual(MediaCodec.BufferInfo expected, MediaCodec.BufferInfo actual)`	Returns whether two `BufferInfos` are equal.
`static void`	`assertDataSourceContent(DataSource dataSource, DataSpec dataSpec, byte[] expectedData, boolean expectKnownLength)`	Asserts that data read from a `DataSource` matches `expected`.
`static Uri`	`buildAssetUri(String assetPath)`	Returns the `Uri` for the given asset path.
`static byte[]`	`buildTestData(int length)`	Equivalent to `buildTestData(length, length)`.
`static byte[]`	`buildTestData(int length, int seed)`	Generates an array of random bytes with the specified length.
`static byte[]`	`buildTestData(int length, Random random)`	Generates an array of random bytes with the specified length.
`static String`	`buildTestString(int length, Random random)`	Generates a random string with the specified length.
`static byte[]`	`createByteArray(int... bytes)`	Converts an array of integers in the range [0, 255] into an equivalent byte array.
`static ImmutableList<Byte>`	`createByteList(int... bytes)`	Converts an array of integers in the range [0, 255] into an equivalent byte list.
`static MetadataInputBuffer`	`createMetadataInputBuffer(byte[] data)`	Create a new `MetadataInputBuffer` and copy `data` into the backing `ByteBuffer`.
`static File`	`createTestFile(File file, long length)`	Writes test data with the specified length to the file and returns it.
`static File`	`createTestFile(File directory, String name)`	Writes one byte long test data to the file and returns it.
`static File`	`createTestFile(File directory, String name, long length)`	Writes test data with the specified length to the file and returns it.
`static FakeExtractorOutput`	`extractAllSamplesFromFile(Extractor extractor, Context context, String fileName)`	Extracts all samples from the given file into a `FakeTrackOutput`.
`static SeekMap`	`extractSeekMap(Extractor extractor, FakeExtractorOutput output, DataSource dataSource, Uri uri)`	Reads from the given input using the given `Extractor`, until it can produce the `SeekMap` and all of the track formats have been identified, or until the extractor encounters EOF.
`static Bitmap`	`getBitmap(Context context, String fileName)`	Returns a `Bitmap` read from an asset file.
`static byte[]`	`getByteArray(Context context, String fileName)`	Returns the bytes of an asset file.
`static ExtractorInput`	`getExtractorInputFromPosition(DataSource dataSource, long position, Uri uri)`	Returns an `ExtractorInput` to read from the given input at given position.
`static DatabaseProvider`	`getInMemoryDatabaseProvider()`	Returns a `DatabaseProvider` that provides an in-memory database.
`static InputStream`	`getInputStream(Context context, String fileName)`	Returns an `InputStream` for reading from an asset file.
`static String`	`getString(Context context, String fileName)`	Returns a `String` read from an asset file.
`static int`	`seekToTimeUs(Extractor extractor, SeekMap seekMap, long seekTimeUs, DataSource dataSource, FakeTrackOutput trackOutput, Uri uri)`	Seeks to the given seek time of the stream from the given input, and keeps reading from the input until we can extract at least one sample following the seek position, or until end-of-input is reached.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - buildTestData
```
public static byte[] buildTestData(int length)
```
    Equivalent to buildTestData(length, length).
    
    Parameters:
    
    length - The length of the array.
    
    Returns:
    
    The generated array.
  - buildTestData
```
public static byte[] buildTestData(int length,
                                   int seed)
```
    Generates an array of random bytes with the specified length.
    
    Parameters:
    
    length - The length of the array.
    
    seed - A seed for an internally created source of randomness.
    
    Returns:
    
    The generated array.
  - buildTestData
```
public static byte[] buildTestData(int length,
                                   Random random)
```
    Generates an array of random bytes with the specified length.
    
    Parameters:
    
    length - The length of the array.
    
    random - A source of randomness.
    
    Returns:
    
    The generated array.
  - buildTestString
```
public static String buildTestString(int length,
                                     Random random)
```
    Generates a random string with the specified length.
    
    Parameters:
    
    length - The length of the string.
    
    random - A source of randomness.
    
    Returns:
    
    The generated string.
  - createByteArray
```
public static byte[] createByteArray(int... bytes)
```
    Converts an array of integers in the range [0, 255] into an equivalent byte array.
    
    Parameters:
    
    bytes - An array of integers, all of which must be in the range [0, 255].
    
    Returns:
    
    The equivalent byte array.
  - createByteList
```
public static ImmutableList<Byte> createByteList(int... bytes)
```
    Converts an array of integers in the range [0, 255] into an equivalent byte list.
    
    Parameters:
    
    bytes - An array of integers, all of which must be in the range [0, 255].
    
    Returns:
    
    The equivalent byte list.
  - createTestFile
```
public static File createTestFile(File directory,
                                  String name)
                           throws IOException
```
    Writes one byte long test data to the file and returns it.
    
    Throws:
    
    IOException
  - createTestFile
```
public static File createTestFile(File directory,
                                  String name,
                                  long length)
                           throws IOException
```
    Writes test data with the specified length to the file and returns it.
    
    Throws:
    
    IOException
  - createTestFile
```
public static File createTestFile(File file,
                                  long length)
                           throws IOException
```
    Writes test data with the specified length to the file and returns it.
    
    Throws:
    
    IOException
  - getByteArray
```
public static byte[] getByteArray(Context context,
                                  String fileName)
                           throws IOException
```
    Returns the bytes of an asset file.
    
    Throws:
    
    IOException
  - getInputStream
```
public static InputStream getInputStream(Context context,
                                         String fileName)
                                  throws IOException
```
    Returns an InputStream for reading from an asset file.
    
    Throws:
    
    IOException
  - getString
```
public static String getString(Context context,
                               String fileName)
                        throws IOException
```
    Returns a String read from an asset file.
    
    Throws:
    
    IOException
  - getBitmap
```
public static Bitmap getBitmap(Context context,
                               String fileName)
                        throws IOException
```
    Returns a Bitmap read from an asset file.
    
    Throws:
    
    IOException
  - getInMemoryDatabaseProvider
```
public static DatabaseProvider getInMemoryDatabaseProvider()
```
    Returns a DatabaseProvider that provides an in-memory database.
  - assertDataSourceContent
```
public static void assertDataSourceContent(DataSource dataSource,
                                           DataSpec dataSpec,
                                           byte[] expectedData,
                                           boolean expectKnownLength)
                                    throws IOException
```
    Asserts that data read from a DataSource matches expected.
    
    Parameters:
    
    dataSource - The DataSource through which to read.
    
    dataSpec - The DataSpec to use when opening the DataSource.
    
    expectedData - The expected data.
    
    expectKnownLength - Whether to assert that DataSource.open(com.google.android.exoplayer2.upstream.DataSpec) returns the expected data length. If false then it's asserted that C.LENGTH_UNSET is returned.
    
    Throws:
    
    IOException - If an error occurs reading fom the DataSource.
  - assertBufferInfosEqual
```
public static void assertBufferInfosEqual(MediaCodec.BufferInfo expected,
                                          MediaCodec.BufferInfo actual)
```
    Returns whether two BufferInfos are equal.
  - assertBitmapsAreSimilar
```
public static void assertBitmapsAreSimilar(Bitmap expectedBitmap,
                                           Bitmap actualBitmap,
                                           double psnrThresholdDb)
```
    Asserts whether actual bitmap is very similar to the expected bitmap at some quality level.
    This is defined as their PSNR value is greater than or equal to the threshold. The higher the threshold, the more similar they are.
    
    Parameters:
    
    expectedBitmap - The expected bitmap.
    
    actualBitmap - The actual bitmap.
    
    psnrThresholdDb - The PSNR threshold (in dB), at or above which bitmaps are considered very similar.
  - buildAssetUri
```
public static Uri buildAssetUri(String assetPath)
```
    Returns the Uri for the given asset path.
  - extractSeekMap
```
public static SeekMap extractSeekMap(Extractor extractor,
                                     FakeExtractorOutput output,
                                     DataSource dataSource,
                                     Uri uri)
                              throws IOException
```
    Reads from the given input using the given Extractor, until it can produce the SeekMap and all of the track formats have been identified, or until the extractor encounters EOF.
    
    Parameters:
    
    extractor - The Extractor to extractor from input.
    
    output - The FakeTrackOutput to store the extracted SeekMap and track.
    
    dataSource - The DataSource that will be used to read from the input.
    
    uri - The Uri of the input.
    
    Returns:
    
    The extracted SeekMap.
    
    Throws:
    
    IOException - If an error occurred reading from the input, or if the extractor finishes reading from input without extracting any SeekMap.
  - extractAllSamplesFromFile
```
public static FakeExtractorOutput extractAllSamplesFromFile(Extractor extractor,
                                                            Context context,
                                                            String fileName)
                                                     throws IOException
```
    Extracts all samples from the given file into a FakeTrackOutput.
    
    Parameters:
    
    extractor - The Extractor to extractor from input.
    
    context - A Context.
    
    fileName - The name of the input file.
    
    Returns:
    
    The FakeTrackOutput containing the extracted samples.
    
    Throws:
    
    IOException - If an error occurred reading from the input, or if the extractor finishes reading from input without extracting any SeekMap.
  - seekToTimeUs
```
public static int seekToTimeUs(Extractor extractor,
                               SeekMap seekMap,
                               long seekTimeUs,
                               DataSource dataSource,
                               FakeTrackOutput trackOutput,
                               Uri uri)
                        throws IOException
```
    Seeks to the given seek time of the stream from the given input, and keeps reading from the input until we can extract at least one sample following the seek position, or until end-of-input is reached.
    
    Parameters:
    
    extractor - The Extractor to extract from input.
    
    seekMap - The SeekMap of the stream from the given input.
    
    seekTimeUs - The seek time, in micro-seconds.
    
    trackOutput - The FakeTrackOutput to store the extracted samples.
    
    dataSource - The DataSource that will be used to read from the input.
    
    uri - The Uri of the input.
    
    Returns:
    
    The index of the first extracted sample written to the given trackOutput after the seek is completed, or C.INDEX_UNSET if the seek is completed without any extracted sample.
    
    Throws:
    
    IOException
  - getExtractorInputFromPosition
```
public static ExtractorInput getExtractorInputFromPosition(DataSource dataSource,
                                                           long position,
                                                           Uri uri)
                                                    throws IOException
```
    Returns an ExtractorInput to read from the given input at given position.
    
    Throws:
    
    IOException
  - createMetadataInputBuffer
```
public static MetadataInputBuffer createMetadataInputBuffer(byte[] data)
```
    Create a new MetadataInputBuffer and copy data into the backing ByteBuffer.

Class TestUtil

Method Summary

Methods inherited from class java.lang.Object

Method Detail

buildTestData

buildTestData

buildTestData

buildTestString

createByteArray

createByteList

createTestFile

createTestFile

createTestFile

getByteArray

getInputStream

getString

getBitmap

getInMemoryDatabaseProvider

assertDataSourceContent

assertBufferInfosEqual

assertBitmapsAreSimilar

buildAssetUri

extractSeekMap

extractAllSamplesFromFile

seekToTimeUs

getExtractorInputFromPosition

createMetadataInputBuffer