commit fffad3b84d2f9bfa30e23950874134a01d7e1293
author Kelvin Zhang <zhangkelvin@google.com> Fri Oct 01 16:47:05 2021 -0700
committer Kelvin Zhang <zhangkelvin@google.com> Tue Oct 05 13:11:52 2021 -0700
tree 680318ad05e9abb7425b8c81a20b3ac6899a1188
parent 5d74b7297ace300f0364025427e3a5810c5f454b

Add some helper macros for testing precondition

We usually do TEST_AND_RETURN_FALSE(x == y), but that macro doesn't
print the exact values of x and y on failure. Add a set of macros which
do that.

Test: th
Change-Id: Ia84093d6adc34e99a634c5d62ba4f21a6bd51046

common/utils.h

diff --git a/common/utils.h b/common/utils.h
index c1820ee..003455d 100644
--- a/common/utils.h
+++ b/common/utils.h
@@ -534,4 +534,22 @@
     }                                          \
   } while (0)
 
+#define TEST_OP(_x, _y, op)                                                \
+  do {                                                                     \
+    const auto& x = _x;                                                    \
+    const auto& y = _y;                                                    \
+    if (!(x op y)) {                                                       \
+      LOG(ERROR) << #_x " " #op " " #_y << " failed: " << x << " " #op " " \
+                 << y;                                                     \
+      return {};                                                           \
+    }                                                                      \
+  } while (0)
+
+#define TEST_EQ(_x, _y) TEST_OP(_x, _y, ==)
+#define TEST_NE(_x, _y) TEST_OP(_x, _y, !=)
+#define TEST_LE(_x, _y) TEST_OP(_x, _y, <=)
+#define TEST_GE(_x, _y) TEST_OP(_x, _y, >=)
+#define TEST_LT(_x, _y) TEST_OP(_x, _y, <)
+#define TEST_GT(_x, _y) TEST_OP(_x, _y, >)
+
 #endif  // UPDATE_ENGINE_COMMON_UTILS_H_