base: avoid evaluating macro argument multiple times.
Previously, in the regex test helpers, we would evaluate the haystack
expression again to generate the error message, which leads to
nonsensical errors if the expression returns a different value on the
second call (e.g. functions like dlerror which return null on subsequent
calls).
Test: bionic-unit-tests with a failure
Test: treehugger
Change-Id: I2126cefeb45e26638194af8a82d0f2a9d7196edf
diff --git a/base/include/android-base/test_utils.h b/base/include/android-base/test_utils.h
index b20f278..f3d7cb0 100644
--- a/base/include/android-base/test_utils.h
+++ b/base/include/android-base/test_utils.h
@@ -53,30 +53,34 @@
CapturedStdout() : CapturedStdFd(STDOUT_FILENO) {}
};
-#define ASSERT_MATCH(str, pattern) \
- do { \
- if (!std::regex_search((str), std::regex((pattern)))) { \
- FAIL() << "regex mismatch: expected " << (pattern) << " in:\n" << (str); \
- } \
+#define ASSERT_MATCH(str, pattern) \
+ do { \
+ auto __s = (str); \
+ if (!std::regex_search(__s, std::regex((pattern)))) { \
+ FAIL() << "regex mismatch: expected " << (pattern) << " in:\n" << __s; \
+ } \
} while (0)
-#define ASSERT_NOT_MATCH(str, pattern) \
- do { \
- if (std::regex_search((str), std::regex((pattern)))) { \
- FAIL() << "regex mismatch: expected to not find " << (pattern) << " in:\n" << (str); \
- } \
+#define ASSERT_NOT_MATCH(str, pattern) \
+ do { \
+ auto __s = (str); \
+ if (std::regex_search(__s, std::regex((pattern)))) { \
+ FAIL() << "regex mismatch: expected to not find " << (pattern) << " in:\n" << __s; \
+ } \
} while (0)
-#define EXPECT_MATCH(str, pattern) \
- do { \
- if (!std::regex_search((str), std::regex((pattern)))) { \
- ADD_FAILURE() << "regex mismatch: expected " << (pattern) << " in:\n" << (str); \
- } \
+#define EXPECT_MATCH(str, pattern) \
+ do { \
+ auto __s = (str); \
+ if (!std::regex_search(__s, std::regex((pattern)))) { \
+ ADD_FAILURE() << "regex mismatch: expected " << (pattern) << " in:\n" << __s; \
+ } \
} while (0)
-#define EXPECT_NOT_MATCH(str, pattern) \
- do { \
- if (std::regex_search((str), std::regex((pattern)))) { \
- ADD_FAILURE() << "regex mismatch: expected to not find " << (pattern) << " in:\n" << (str); \
- } \
+#define EXPECT_NOT_MATCH(str, pattern) \
+ do { \
+ auto __s = (str); \
+ if (std::regex_search(__s, std::regex((pattern)))) { \
+ ADD_FAILURE() << "regex mismatch: expected to not find " << (pattern) << " in:\n" << __s; \
+ } \
} while (0)