Enable a subset of error prone rules for hostside tests

Enable couple of rules for CTS host sides tests and fix
the errors.
- TryFailThrowable: fail() is throwing and AssertionError
that was caught resulting in the check always passing.

Test: make cts javac-check -j76 TARGET_PRODUCT=aosp_arm64
WITH_DEXPREOPT=false RUN_ERROR_PRONE=true
Bug: 37854485

Change-Id: I99319c3e3083cc01b5be18fb33c6ae2a30ee9c30
diff --git a/build/config.mk b/build/config.mk
index 573dc7b..159dc8d 100644
--- a/build/config.mk
+++ b/build/config.mk
@@ -20,7 +20,7 @@
 BUILD_COMPATIBILITY_SUITE := cts/build/compatibility_test_suite.mk
 BUILD_CTS_EXECUTABLE := cts/build/test_executable.mk
 BUILD_CTS_PACKAGE := cts/build/test_package.mk
-BUILD_CTS_HOST_JAVA_LIBRARY := $(BUILD_HOST_JAVA_LIBRARY)
+BUILD_CTS_HOST_JAVA_LIBRARY := cts/build/host_java_library.mk
 BUILD_CTS_TARGET_JAVA_LIBRARY := cts/build/test_target_java_library.mk
 BUILD_CTS_SUPPORT_PACKAGE := cts/build/support_package.mk
 BUILD_CTS_DEVICE_INFO_PACKAGE := cts/build/device_info_package.mk
diff --git a/build/host_java_library.mk b/build/host_java_library.mk
new file mode 100644
index 0000000..303527e
--- /dev/null
+++ b/build/host_java_library.mk
@@ -0,0 +1,22 @@
+# 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.
+
+# Builds a java library (jar)
+#
+# Replace "include $(BUILD_HOST_JAVA_LIBRARY) with "include $(BUILD_CTS_HOST_JAVA_LIBRARY)
+#
+
+-include cts/error_prone_rules_tests.mk
+
+include $(BUILD_HOST_JAVA_LIBRARY)
diff --git a/error_prone_rules_tests.mk b/error_prone_rules_tests.mk
new file mode 100644
index 0000000..78cb3a0
--- /dev/null
+++ b/error_prone_rules_tests.mk
@@ -0,0 +1,21 @@
+# 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.
+
+# Set of error prone rules to ensure code quality of tests
+
+# Goal is to eventually merge with error_prone_rules.mk
+LOCAL_ERROR_PRONE_FLAGS:= -Xep:JUnit3TestNotRun:ERROR \
+                          -Xep:JUnitAmbiguousTestClass:ERROR \
+                          -Xep:TryFailThrowable:ERROR
+
diff --git a/hostsidetests/appsecurity/src/android/appsecurity/cts/AdoptableHostTest.java b/hostsidetests/appsecurity/src/android/appsecurity/cts/AdoptableHostTest.java
index 16e2765..78b03e4 100644
--- a/hostsidetests/appsecurity/src/android/appsecurity/cts/AdoptableHostTest.java
+++ b/hostsidetests/appsecurity/src/android/appsecurity/cts/AdoptableHostTest.java
@@ -269,10 +269,14 @@
             // Kick through a remount cycle, which should purge the adopted app
             getDevice().executeShellCommand("sm mount " + vol.volId);
             runDeviceTests(PKG, CLASS, "testDataInternal");
+            boolean didThrow = false;
             try {
                 runDeviceTests(PKG, CLASS, "testDataRead");
-                fail("Unexpected data from adopted volume picked up");
             } catch (AssertionError expected) {
+                didThrow = true;
+            }
+            if (!didThrow) {
+                fail("Unexpected data from adopted volume picked up");
             }
             getDevice().executeShellCommand("sm unmount " + vol.volId);
 
diff --git a/hostsidetests/appsecurity/src/android/appsecurity/cts/PermissionsHostTest.java b/hostsidetests/appsecurity/src/android/appsecurity/cts/PermissionsHostTest.java
index b7f7f88..79f838c 100644
--- a/hostsidetests/appsecurity/src/android/appsecurity/cts/PermissionsHostTest.java
+++ b/hostsidetests/appsecurity/src/android/appsecurity/cts/PermissionsHostTest.java
@@ -76,22 +76,30 @@
     public void testFail() throws Exception {
         // Sanity check that remote failure is host failure
         assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_23), false, false));
+        boolean didThrow = false;
         try {
             runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest23",
                     "testFail");
-            fail("Expected remote failure");
         } catch (AssertionError expected) {
+            didThrow = true;
+        }
+        if (!didThrow) {
+            fail("Expected remote failure");
         }
     }
 
     public void testKill() throws Exception {
         // Sanity check that remote kill is host failure
         assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_23), false, false));
+        boolean didThrow = false;
         try {
             runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest23",
                     "testKill");
-            fail("Expected remote failure");
         } catch (AssertionError expected) {
+            didThrow = true;
+        }
+        if (!didThrow) {
+            fail("Expected remote failure");
         }
     }
 
@@ -103,11 +111,15 @@
 
     public void testCompatRevoked22() throws Exception {
         assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_22), false, false));
+        boolean didThrow = false;
         try {
             runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest22",
                     "testCompatRevoked_part1");
-            fail("App must be killed on a permission revoke");
         } catch (AssertionError expected) {
+            didThrow = true;
+        }
+        if (!didThrow) {
+            fail("App must be killed on a permission revoke");
         }
         runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest22",
                 "testCompatRevoked_part2");
@@ -169,10 +181,15 @@
 
     public void testRevokeAffectsWholeGroup23() throws Exception {
         assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_23), false, false));
+        boolean didThrow = false;
         try {
             runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest23",
                     "testRevokeAffectsWholeGroup_part1");
         } catch (AssertionError expected) {
+            didThrow = true;
+        }
+        if (!didThrow) {
+            fail("Should have thrown an exception.");
         }
         runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest23",
                 "testRevokeAffectsWholeGroup_part2");
@@ -180,11 +197,15 @@
 
     public void testGrantPreviouslyRevokedWithPrejudiceShowsPrompt23() throws Exception {
         assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_23), false, false));
+        boolean didThrow = false;
         try {
             runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest23",
                     "testGrantPreviouslyRevokedWithPrejudiceShowsPrompt_part1");
-            fail("App must be killed on a permission revoke");
         } catch (Throwable expected) {
+            didThrow = true;
+        }
+        if (!didThrow) {
+            fail("App must be killed on a permission revoke");
         }
         runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest23",
                 "testGrantPreviouslyRevokedWithPrejudiceShowsPrompt_part2");
@@ -225,10 +246,14 @@
 
     public void testNoDowngradePermissionModel() throws Exception {
         assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_23), false, false));
+        boolean didThrow = false;
         try {
             assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_22), true, false));
-            fail("Permission mode downgrade not allowed");
         } catch (AssertionError expected) {
+            didThrow = true;
+        }
+        if (!didThrow) {
+            fail("Permission mode downgrade not allowed");
         }
     }
 
@@ -244,11 +269,15 @@
 
     public void testRevokePropagatedOnUpgradeOldToNewModel() throws Exception {
         assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_22), false, false));
+        boolean didThrow = false;
         try {
             runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest22",
                     "testRevokePropagatedOnUpgradeOldToNewModel_part1");
-            fail("App must be killed on a permission revoke");
         } catch (AssertionError expected) {
+            didThrow = true;
+        }
+        if (!didThrow) {
+            fail("App must be killed on a permission revoke");
         }
         assertNull(getDevice().installPackage(mBuildHelper.getTestFile(APK_23), true, false));
         runDeviceTests(USES_PERMISSION_PKG, "com.android.cts.usepermission.UsePermissionTest23",