Testing Data Scheme URI Handling Implementation in SmartTube
This test suite validates the DataSchemeDataSource class in ExoPlayer, focusing on handling data URIs with base64 and ASCII encoding. It verifies data reading, range requests, and error handling for data scheme URIs.
Test Coverage Overview
Implementation Analysis
Technical Details
Best Practices Demonstrated
yuliskov/smarttube
exoplayer-amzn-2.10.6/library/core/src/test/java/com/google/android/exoplayer2/upstream/DataSchemeDataSourceTest.java
/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.exoplayer2.upstream;
import static com.google.android.exoplayer2.C.RESULT_END_OF_INPUT;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.fail;
import android.net.Uri;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.util.Util;
import java.io.IOException;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
/** Unit tests for {@link DataSchemeDataSource}. */
@RunWith(AndroidJUnit4.class)
public final class DataSchemeDataSourceTest {
private static final String DATA_SCHEME_URI =
"data:text/plain;base64,eyJwcm92aWRlciI6IndpZGV2aW5lX3Rlc3QiLCJjb250ZW50X2lkIjoiTWpBeE5WOTBaV"
+ "0Z5Y3c9PSIsImtleV9pZHMiOlsiMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAiXX0=";
private DataSource schemeDataDataSource;
@Before
public void setUp() {
schemeDataDataSource = new DataSchemeDataSource();
}
@Test
public void testBase64Data() throws IOException {
DataSpec dataSpec = buildDataSpec(DATA_SCHEME_URI);
DataSourceAsserts.assertDataSourceContent(
schemeDataDataSource,
dataSpec,
Util.getUtf8Bytes(
"{\"provider\":\"widevine_test\",\"content_id\":\"MjAxNV90ZWFycw==\",\"key_ids\":"
+ "[\"00000000000000000000000000000000\"]}"));
}
@Test
public void testAsciiData() throws IOException {
DataSourceAsserts.assertDataSourceContent(
schemeDataDataSource,
buildDataSpec("data:,A%20brief%20note"),
Util.getUtf8Bytes("A brief note"));
}
@Test
public void testPartialReads() throws IOException {
byte[] buffer = new byte[18];
DataSpec dataSpec = buildDataSpec("data:,012345678901234567");
assertThat(schemeDataDataSource.open(dataSpec)).isEqualTo(18);
assertThat(schemeDataDataSource.read(buffer, 0, 9)).isEqualTo(9);
assertThat(schemeDataDataSource.read(buffer, 3, 0)).isEqualTo(0);
assertThat(schemeDataDataSource.read(buffer, 9, 15)).isEqualTo(9);
assertThat(schemeDataDataSource.read(buffer, 1, 0)).isEqualTo(0);
assertThat(schemeDataDataSource.read(buffer, 1, 1)).isEqualTo(RESULT_END_OF_INPUT);
assertThat(Util.fromUtf8Bytes(buffer, 0, 18)).isEqualTo("012345678901234567");
}
@Test
public void testSequentialRangeRequests() throws IOException {
DataSpec dataSpec =
buildDataSpec(DATA_SCHEME_URI, /* position= */ 1, /* length= */ C.LENGTH_UNSET);
DataSourceAsserts.assertDataSourceContent(
schemeDataDataSource,
dataSpec,
Util.getUtf8Bytes(
"\"provider\":\"widevine_test\",\"content_id\":\"MjAxNV90ZWFycw==\",\"key_ids\":"
+ "[\"00000000000000000000000000000000\"]}"));
dataSpec = buildDataSpec(DATA_SCHEME_URI, /* position= */ 10, /* length= */ C.LENGTH_UNSET);
DataSourceAsserts.assertDataSourceContent(
schemeDataDataSource,
dataSpec,
Util.getUtf8Bytes(
"\":\"widevine_test\",\"content_id\":\"MjAxNV90ZWFycw==\",\"key_ids\":"
+ "[\"00000000000000000000000000000000\"]}"));
dataSpec = buildDataSpec(DATA_SCHEME_URI, /* position= */ 15, /* length= */ 5);
DataSourceAsserts.assertDataSourceContent(
schemeDataDataSource, dataSpec, Util.getUtf8Bytes("devin"));
}
@Test
public void testInvalidStartPositionRequest() throws IOException {
try {
// Try to open a range starting one byte beyond the resource's length.
schemeDataDataSource.open(
buildDataSpec(DATA_SCHEME_URI, /* position= */ 108, /* length= */ C.LENGTH_UNSET));
fail();
} catch (DataSourceException e) {
assertThat(e.reason).isEqualTo(DataSourceException.POSITION_OUT_OF_RANGE);
}
}
@Test
public void testRangeExceedingResourceLengthRequest() throws IOException {
try {
// Try to open a range exceeding the resource's length.
schemeDataDataSource.open(
buildDataSpec(DATA_SCHEME_URI, /* position= */ 97, /* length= */ 11));
fail();
} catch (DataSourceException e) {
assertThat(e.reason).isEqualTo(DataSourceException.POSITION_OUT_OF_RANGE);
}
}
@Test
public void testIncorrectScheme() {
try {
schemeDataDataSource.open(buildDataSpec("http://www.google.com"));
fail();
} catch (IOException e) {
// Expected.
}
}
@Test
public void testMalformedData() {
try {
schemeDataDataSource.open(buildDataSpec("data:text/plain;base64,,This%20is%20Content"));
fail();
} catch (IOException e) {
// Expected.
}
try {
schemeDataDataSource.open(buildDataSpec("data:text/plain;base64,IncorrectPadding=="));
fail();
} catch (IOException e) {
// Expected.
}
}
private static DataSpec buildDataSpec(String uriString) {
return buildDataSpec(uriString, /* position= */ 0, /* length= */ C.LENGTH_UNSET);
}
private static DataSpec buildDataSpec(String uriString, int position, int length) {
return new DataSpec(Uri.parse(uriString), position, length, /* key= */ null);
}
}