Add unit tests for odrefresh - step 2

- Define MockableExecUtils, which is a wrapper class to make exec_utils
mockable.
- Add another constructor to the OnDeviceRefresh class to support
injections.
- Update OdrConfig to support overriding the staging directory.
- Add a unit test to verify that odrefresh sets compiler filter based on
"dalvik.vm.systemservercompilerfilter".

Bug: 196188549
Test: atest art_standalone_odrefresh_tests
Test: atest odsign_e2e_tests
Change-Id: Ia7b4347bba6873878490a513b8a5ff6642122d71

1 files changed, 22 insertions, 0 deletions

diff --git a/runtime/exec_utils.h b/runtime/exec_utils.h
index 5e22639a08..e011c822ba 100644
--- a/runtime/exec_utils.h
+++ b/runtime/exec_utils.h
@@ -37,6 +37,28 @@ int ExecAndReturnCode(std::vector<std::string>& arg_vector,
                       /*out*/ bool* timed_out,
                       /*out*/ std::string* error_msg);
 
+// A wrapper class to make the functions above mockable.
+class ExecUtils {
+ public:
+  virtual ~ExecUtils() = default;
+
+  virtual bool Exec(std::vector<std::string>& arg_vector, /*out*/ std::string* error_msg) const {
+    return art::Exec(arg_vector, error_msg);
+  }
+
+  virtual int ExecAndReturnCode(std::vector<std::string>& arg_vector,
+                                /*out*/ std::string* error_msg) const {
+    return art::ExecAndReturnCode(arg_vector, error_msg);
+  }
+
+  virtual int ExecAndReturnCode(std::vector<std::string>& arg_vector,
+                                time_t timeout_secs,
+                                /*out*/ bool* timed_out,
+                                /*out*/ std::string* error_msg) const {
+    return art::ExecAndReturnCode(arg_vector, timeout_secs, timed_out, error_msg);
+  }
+};
+
 }  // namespace art
 
 #endif  // ART_RUNTIME_EXEC_UTILS_H_