Do not actually reboot the device in VTS test.

- Sometimes reboot takes longer time and makes following tests fail.
- If the device has a screen lock, tests get stuck there.

This is not a new issue, but a recently added test (#launchApp) tries
to start an Activity and it fails when the device is still booting or at
a screen lock.

Bug: 185483743
Bug: 185576411
Test: atest FrameworksServicesTests:UpdatableFontDirTest
Test: atest UpdatableSystemFontTest
Change-Id: I86d4be1761e648114503b5f3560992a89c0b34d7

5 files changed, 46 insertions, 16 deletions

diff --git a/services/core/java/com/android/server/graphics/fonts/FontManagerService.java b/services/core/java/com/android/server/graphics/fonts/FontManagerService.java
index 7269a8f021f6..91581997849e 100644
--- a/services/core/java/com/android/server/graphics/fonts/FontManagerService.java
+++ b/services/core/java/com/android/server/graphics/fonts/FontManagerService.java
@@ -314,6 +314,10 @@ public final class FontManagerService extends IFontManager.Stub {
         }
     }
 
+    /* package */ void restart() {
+        initialize();
+    }
+
     /* package */ Map<String, File> getFontFileMap() {
         if (mUpdatableFontDir == null) {
             return Collections.emptyMap();
diff --git a/services/core/java/com/android/server/graphics/fonts/FontManagerShellCommand.java b/services/core/java/com/android/server/graphics/fonts/FontManagerShellCommand.java
index 5457ef2c77a9..8508aa786926 100644
--- a/services/core/java/com/android/server/graphics/fonts/FontManagerShellCommand.java
+++ b/services/core/java/com/android/server/graphics/fonts/FontManagerShellCommand.java
@@ -95,6 +95,15 @@ public class FontManagerShellCommand extends ShellCommand {
         w.println();
         w.println("clear");
         w.println("    Remove all installed font files and reset to the initial state.");
+        w.println();
+        w.println("restart");
+        w.println("    Restart FontManagerService emulating device reboot.");
+        w.println("    WARNING: this is not a safe operation. Other processes may misbehave if");
+        w.println("    they are using fonts updated by FontManagerService.");
+        w.println("    This command exists merely for testing.");
+        w.println();
+        w.println("status");
+        w.println("    Prints status of current system font configuration.");
     }
 
     /* package */ void dumpAll(@NonNull IndentingPrintWriter w) {
@@ -368,7 +377,13 @@ public class FontManagerShellCommand extends ShellCommand {
         return 0;
     }
 
-    private int status(ShellCommand shell) throws SystemFontException {
+    private int restart(ShellCommand shell) {
+        mService.restart();
+        shell.getOutPrintWriter().println("Success");
+        return 0;
+    }
+
+    private int status(ShellCommand shell) {
         final IndentingPrintWriter writer =
                 new IndentingPrintWriter(shell.getOutPrintWriter(), "  ");
         FontConfig config = mService.getSystemFontConfig();
@@ -396,6 +411,8 @@ public class FontManagerShellCommand extends ShellCommand {
                     return update(shell);
                 case "clear":
                     return clear(shell);
+                case "restart":
+                    return restart(shell);
                 case "status":
                     return status(shell);
                 default:
diff --git a/services/core/java/com/android/server/graphics/fonts/UpdatableFontDir.java b/services/core/java/com/android/server/graphics/fonts/UpdatableFontDir.java
index c0ab09319a06..b39bd7db797d 100644
--- a/services/core/java/com/android/server/graphics/fonts/UpdatableFontDir.java
+++ b/services/core/java/com/android/server/graphics/fonts/UpdatableFontDir.java
@@ -125,7 +125,7 @@ final class UpdatableFontDir {
     private final Supplier<Long> mCurrentTimeSupplier;
 
     private long mLastModifiedMillis;
-    private int mConfigVersion = 1;
+    private int mConfigVersion;
 
     /**
      * A mutable map containing mapping from font file name (e.g. "NotoColorEmoji.ttf") to {@link
@@ -152,9 +152,15 @@ final class UpdatableFontDir {
         mCurrentTimeSupplier = currentTimeSupplier;
     }
 
+    /**
+     * Loads fonts from file system, validate them, and delete obsolete font files.
+     * Note that this method may be called by multiple times in integration tests via {@link
+     * FontManagerService#restart()}.
+     */
     /* package */ void loadFontFileMap() {
         mFontFileInfoMap.clear();
         mLastModifiedMillis = 0;
+        mConfigVersion = 1;
         boolean success = false;
         try {
             PersistentSystemFontConfig.Config config = new PersistentSystemFontConfig.Config();
diff --git a/services/tests/servicestests/src/com/android/server/graphics/fonts/UpdatableFontDirTest.java b/services/tests/servicestests/src/com/android/server/graphics/fonts/UpdatableFontDirTest.java
index 8e5136d9659b..f1e5782f110d 100644
--- a/services/tests/servicestests/src/com/android/server/graphics/fonts/UpdatableFontDirTest.java
+++ b/services/tests/servicestests/src/com/android/server/graphics/fonts/UpdatableFontDirTest.java
@@ -381,6 +381,21 @@ public final class UpdatableFontDirTest {
     }
 
     @Test
+    public void loadFontFileMap_twice() throws Exception {
+        FakeFontFileParser parser = new FakeFontFileParser();
+        FakeFsverityUtil fakeFsverityUtil = new FakeFsverityUtil();
+        UpdatableFontDir dir = new UpdatableFontDir(
+                mUpdatableFontFilesDir, mPreinstalledFontDirs, parser, fakeFsverityUtil,
+                mConfigFile, mCurrentTimeSupplier);
+        dir.loadFontFileMap();
+        dir.update(Collections.singletonList(newFontUpdateRequest("test.ttf,1", GOOD_SIGNATURE)));
+        assertThat(dir.getFontFileMap()).containsKey("test.ttf");
+        File fontFile = dir.getFontFileMap().get("test.ttf");
+        dir.loadFontFileMap();
+        assertThat(dir.getFontFileMap().get("test.ttf")).isEqualTo(fontFile);
+    }
+
+    @Test
     public void installFontFile() throws Exception {
         FakeFontFileParser parser = new FakeFontFileParser();
         FakeFsverityUtil fakeFsverityUtil = new FakeFsverityUtil();
diff --git a/tests/UpdatableSystemFontTest/src/com/android/updatablesystemfont/UpdatableSystemFontTest.java b/tests/UpdatableSystemFontTest/src/com/android/updatablesystemfont/UpdatableSystemFontTest.java
index 19dfdabd936f..74f6bca4d7a0 100644
--- a/tests/UpdatableSystemFontTest/src/com/android/updatablesystemfont/UpdatableSystemFontTest.java
+++ b/tests/UpdatableSystemFontTest/src/com/android/updatablesystemfont/UpdatableSystemFontTest.java
@@ -196,9 +196,8 @@ public class UpdatableSystemFontTest extends BaseHostJUnit4Test {
         String fontPath = getFontPath(NOTO_COLOR_EMOJI_TTF);
         assertThat(fontPath).startsWith(DATA_FONTS_DIR);
 
-        expectRemoteCommandToSucceed("stop");
-        expectRemoteCommandToSucceed("start");
-        waitUntilFontCommandIsReady();
+        // Emulate reboot by 'cmd font restart'.
+        expectRemoteCommandToSucceed("cmd font restart");
         String fontPathAfterReboot = getFontPath(NOTO_COLOR_EMOJI_TTF);
         assertThat(fontPathAfterReboot).isEqualTo(fontPath);
     }
@@ -242,17 +241,6 @@ public class UpdatableSystemFontTest extends BaseHostJUnit4Test {
                 .isNotEqualTo(CommandStatus.SUCCESS);
     }
 
-    private void waitUntilFontCommandIsReady() {
-        waitUntil(SECONDS.toMillis(30), () -> {
-            try {
-                return getDevice().executeShellV2Command("cmd font status").getStatus()
-                        == CommandStatus.SUCCESS;
-            } catch (DeviceNotAvailableException e) {
-                return false;
-            }
-        });
-    }
-
     private void waitUntil(long timeoutMillis, ThrowingSupplier<Boolean> func) {
         long untilMillis = System.currentTimeMillis() + timeoutMillis;
         do {