Read the file to force streaming.

Bug: 263449831
Test: atest
android.incrementalinstall.cts.IncrementalInstallTest#testAddSplitToExistingInstallAfterReboot
--iterations

Change-Id: I0219b1be3f699adcbb39e0279ee2943a98821da8
Merged-In: I0219b1be3f699adcbb39e0279ee2943a98821da8
diff --git a/hostsidetests/incrementalinstall/appvalidator/src/android/incrementalinstall/inrementaltestappvalidation/AppValidationTest.java b/hostsidetests/incrementalinstall/appvalidator/src/android/incrementalinstall/inrementaltestappvalidation/AppValidationTest.java
index 6654d5b..5dc7dd8 100644
--- a/hostsidetests/incrementalinstall/appvalidator/src/android/incrementalinstall/inrementaltestappvalidation/AppValidationTest.java
+++ b/hostsidetests/incrementalinstall/appvalidator/src/android/incrementalinstall/inrementaltestappvalidation/AppValidationTest.java
@@ -39,6 +39,11 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
 @RunWith(AndroidJUnit4.class)
 @AppModeFull
 public class AppValidationTest {
@@ -87,6 +92,17 @@
         assertEquals(isIncfsInstallation,
                 new PathChecker().isIncFsPath(installedAppInfo.installationPath));
         assertEquals(versionCode, installedAppInfo.versionCode);
+        // Read the whole file to make sure it's streamed.
+        readFullFile(new File(installedAppInfo.installationPath, "base.apk"));
+    }
+
+    private static void readFullFile(File file) throws IOException {
+        try (InputStream inputStream = new FileInputStream(file)) {
+            byte[] buffer = new byte[1024];
+            while (inputStream.read(buffer) != -1) {
+                // ignore
+            }
+        }
     }
 
     private void launchTestApp() throws Exception {
diff --git a/hostsidetests/incrementalinstall/src/android/incrementalinstall/cts/IncrementalInstallTest.java b/hostsidetests/incrementalinstall/src/android/incrementalinstall/cts/IncrementalInstallTest.java
index a2e316a..c050b2c 100644
--- a/hostsidetests/incrementalinstall/src/android/incrementalinstall/cts/IncrementalInstallTest.java
+++ b/hostsidetests/incrementalinstall/src/android/incrementalinstall/cts/IncrementalInstallTest.java
@@ -23,6 +23,7 @@
 import static android.incrementalinstall.common.Consts.SupportedComponents.ON_CREATE_COMPONENT_2;
 import static android.incrementalinstall.common.Consts.SupportedComponents.UNCOMPRESSED_NATIVE_COMPONENT;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assume.assumeTrue;
@@ -261,9 +262,9 @@
         getDevice().executeAdbCommand("push",
                 getFilePathFromBuildInfo(TEST_APP_DYNAMIC_CODE_NAME + SIG_SUFFIX),
                 deviceLocalPath);
-        getDevice().executeShellCommand(
+        assertEquals("Success\n", getDevice().executeShellCommand(
                 String.format("pm install-incremental -p %s %s", TEST_APP_PACKAGE_NAME,
-                        deviceLocalPath + TEST_APP_DYNAMIC_CODE_NAME));
+                        deviceLocalPath + TEST_APP_DYNAMIC_CODE_NAME)));
         // Verify still on Incremental.
         verifyInstallationTypeAndVersion(TEST_APP_PACKAGE_NAME, /* isIncfs= */ true,
                 TEST_APP_V1_VERSION);