CTS test to ensure statsd isn't in boostrap apexes

Reads boostrap-apex-info-list.xml and parses it.
Ensures that statsd is not present in the list.

Also, add a clang-format

Test: atest CtsStatsdHostTestCases#BootstrapApexTests
Bug: 186767843
Change-Id: I8299a7c274671b5310b1de75b743f3589287a120

2 files changed, 92 insertions, 0 deletions

diff --git a/tests/.clang-format b/tests/.clang-format
new file mode 100644
index 00000000..2b2c71ac
--- /dev/null
+++ b/tests/.clang-format
@@ -0,0 +1,13 @@
+BasedOnStyle: Google
+
+AccessModifierOffset: -4
+AlignOperands: false
+AllowShortFunctionsOnASingleLine: Inline
+AlwaysBreakBeforeMultilineStrings: false
+ColumnLimit: 100
+CommentPragmas: NOLINT:.*
+ConstructorInitializerIndentWidth: 6
+ContinuationIndentWidth: 8
+IndentWidth: 4
+PenaltyBreakBeforeFirstCallParameter: 100000
+SpacesBeforeTrailingComments: 1
\ No newline at end of file
diff --git a/tests/src/android/cts/statsd/apex/BootstrapApexTests.java b/tests/src/android/cts/statsd/apex/BootstrapApexTests.java
new file mode 100644
index 00000000..647a9e32
--- /dev/null
+++ b/tests/src/android/cts/statsd/apex/BootstrapApexTests.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2021 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 android.cts.statsd.apex;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.cts.statsd.atom.BaseTestCase;
+import com.android.compatibility.common.util.ApiLevelUtil;
+import com.android.tradefed.log.LogUtil;
+import java.io.StringReader;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import org.junit.Before;
+import org.w3c.dom.Document;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.InputSource;
+
+/**
+ * Verify statsd is not in the bootstrap apexes
+ */
+public class BootstrapApexTests extends BaseTestCase {
+    private static final String TAG = "Statsd.BootstrapApexTests";
+
+    // Constants
+    private static final String BOOTSTRAP_APEX_FILE = "/apex/.bootstrap-apex-info-list.xml";
+
+    private boolean sdkLevelAtLeast(int sdkLevel, String codename) throws Exception {
+        return ApiLevelUtil.isAtLeast(getDevice(), sdkLevel)
+                || ApiLevelUtil.codenameEquals(getDevice(), codename);
+    }
+
+    public void testStatsdNotPresent() throws Exception {
+        if (!sdkLevelAtLeast(31, "S")) {
+            return;
+        }
+        String adbCommand = "cat " + BOOTSTRAP_APEX_FILE;
+        String fileContents = getDevice().executeShellCommand(adbCommand);
+
+        LogUtil.CLog.d(TAG + " Received the following file: " + fileContents);
+        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+        DocumentBuilder builder = factory.newDocumentBuilder();
+        Document xml = builder.parse(new InputSource(new StringReader(fileContents)));
+
+        NodeList apexInfoList = xml.getElementsByTagName("apex-info-list");
+        assertThat(apexInfoList.getLength()).isEqualTo(1);
+        NodeList apexInfoNodes = apexInfoList.item(0).getChildNodes();
+        assertThat(apexInfoNodes.getLength()).isGreaterThan(0);
+
+        int numApexes = 0;
+        for (int i = 0; i < apexInfoNodes.getLength(); i++) {
+            Node apexInfoNode = apexInfoNodes.item(i);
+            String name = apexInfoNode.getNodeName();
+            if (name.equals("apex-info")) {
+                numApexes++;
+                NamedNodeMap attr = apexInfoNode.getAttributes();
+                Node moduleName = attr.getNamedItem("moduleName");
+                assertThat(moduleName).isNotNull();
+                assertThat(moduleName.getNodeValue()).isNotEqualTo("com.android.os.statsd");
+            }
+        }
+        assertThat(numApexes).isGreaterThan(0);
+    }
+}