util_test: Don’t crash when run from the wrong location

util/test/multiprocess_exec_test.cc

Index: util/test/multiprocess_exec_test.cc
diff --git a/util/test/multiprocess_exec_test.cc b/util/test/multiprocess_exec_test.cc
index c30843ed51dda7c7dec49d4ceeaa985837eaad66..ecadc4444cd8454145f95405a5b3eb159900e1fb 100644
--- a/util/test/multiprocess_exec_test.cc
+++ b/util/test/multiprocess_exec_test.cc
@@ -33,10 +33,13 @@ class TestMultiprocessExec final : public MultiprocessExec {
 
  private:
   void MultiprocessParent() override {
+    // Use Logging*FD() instead of Checked*FD() so that the test can fail
+    // gracefully with a gtest assertion if the child does not execute properly.
+
     char c = 'z';
-    CheckedWriteFD(WritePipeFD(), &c, 1);
+    ASSERT_TRUE(LoggingWriteFD(WritePipeFD(), &c, 1));
 
-    CheckedReadFD(ReadPipeFD(), &c, 1);
+    ASSERT_TRUE(LoggingReadFD(ReadPipeFD(), &c, 1));
     EXPECT_EQ('Z', c);
   }