From b4d6a1be9635a246e6f2c90d5dcd1cc698087843 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20G=C3=BCndling?= <felix.guendling@gmail.com>
Date: Wed, 22 Jan 2025 17:28:08 +0100
Subject: [PATCH] logging: add streamed test case, make log threshold global

---
 include/utl/logging.h | 10 ++--------
 test/logging_test.cc  | 32 ++++++++++++++++++++++++++------
 2 files changed, 28 insertions(+), 14 deletions(-)

diff --git a/include/utl/logging.h b/include/utl/logging.h
index 888be98..dd7bec9 100644
--- a/include/utl/logging.h
+++ b/include/utl/logging.h
@@ -1,9 +1,5 @@
 #pragma once
 
-#ifdef LOGGING_HEADER
-#include LOGGING_HEADER
-#else
-
 #include <chrono>
 #include <iomanip>
 #include <iostream>
@@ -28,7 +24,7 @@ constexpr char const* to_str(log_level const level) {
   return "";
 }
 
-static log_level s_verbosity;
+extern log_level log_verbosity;
 
 inline std::string now() {
   using clock = std::chrono::system_clock;
@@ -55,7 +51,7 @@ struct log {
         msg_{fmt::format(fmt_str, std::forward<Args>(args)...)} {}
 
   ~log() {
-    if (LogLevel >= utl::s_verbosity) {
+    if (LogLevel >= log_verbosity) {
 #if defined(_WIN32)
       auto const base_file_name = strrchr(loc_.file_name(), '\\')
                                       ? strrchr(loc_.file_name(), '\\') + 1
@@ -126,5 +122,3 @@ log_error(const char* ctx, fmt::format_string<Args...>,
           Args&&... args) -> log_error<Args...>;
 
 }  // namespace utl
-
-#endif  // LOGGING_HEADER
diff --git a/test/logging_test.cc b/test/logging_test.cc
index 1aee74f..c0930de 100644
--- a/test/logging_test.cc
+++ b/test/logging_test.cc
@@ -14,7 +14,7 @@ TEST(log, can_send_info_msg) {
       testing::internal::GetCapturedStderr(),
       MatchesRegex(
           ".+T.+Z \\[info\\] \\[logging.+:.+\\] \\[MyCtx\\] Message\n"));
-};
+}
 
 TEST(log, can_send_debug_msg) {
   testing::internal::CaptureStderr();
@@ -23,7 +23,7 @@ TEST(log, can_send_debug_msg) {
       testing::internal::GetCapturedStderr(),
       MatchesRegex(
           ".+T.+Z \\[debug\\] \\[logging.+:.+\\] \\[MyCtx\\] Message\n"));
-};
+}
 
 TEST(log, can_send_error_msg) {
   testing::internal::CaptureStderr();
@@ -32,7 +32,7 @@ TEST(log, can_send_error_msg) {
       testing::internal::GetCapturedStderr(),
       MatchesRegex(
           ".+T.+Z \\[error\\] \\[logging.+:.+\\] \\[MyCtx\\] Message\n"));
-};
+}
 
 TEST(log, can_format_extra_params) {
   testing::internal::CaptureStderr();
@@ -41,7 +41,7 @@ TEST(log, can_format_extra_params) {
   EXPECT_THAT(testing::internal::GetCapturedStderr(),
               MatchesRegex(".+T.+Z \\[info\\] \\[logging.+:.+\\] \\[MyCtx\\] "
                            "String=Hello Int=42\n"));
-};
+}
 
 TEST(log, accept_string_view_as_extra_param) {
   testing::internal::CaptureStderr();
@@ -50,7 +50,7 @@ TEST(log, accept_string_view_as_extra_param) {
   EXPECT_THAT(testing::internal::GetCapturedStderr(),
               MatchesRegex(".+T.+Z \\[info\\] \\[logging.+:.+\\] \\[MyCtx\\] "
                            "Hello world!\n"));
-};
+}
 
 TEST(log, accept_string_view_as_extra_param_inline) {
   testing::internal::CaptureStderr();
@@ -59,7 +59,7 @@ TEST(log, accept_string_view_as_extra_param_inline) {
   EXPECT_THAT(testing::internal::GetCapturedStderr(),
               MatchesRegex(".+T.+Z \\[info\\] \\[logging.+:.+\\] \\[MyCtx\\] "
                            "Hello world!\n"));
-};
+}
 
 TEST(log, can_have_optional_attrs) {
   testing::internal::CaptureStderr();
@@ -68,4 +68,24 @@ TEST(log, can_have_optional_attrs) {
       testing::internal::GetCapturedStderr(),
       MatchesRegex(
           ".+T.+Z \\[info\\] \\[logging.+:.+\\] \\[MyCtx\\] Message\n"));
+}
+
+
+struct dtor {
+  friend std::ostream& operator<<(std::ostream& out, dtor const& x) {
+    return out << x.x_;
+  }
+  ~dtor() { std::clog << "DESTROY\n";}
+  int x_;
 };
+TEST(log, temporary_streamed) {
+  testing::internal::CaptureStderr();
+  auto const tmp = []() {
+    return dtor{.x_ = 9999};
+  };
+  utl::log_info("MyCtx", "{} {}", fmt::streamed(tmp()), fmt::streamed(tmp()));
+  EXPECT_THAT(
+      testing::internal::GetCapturedStderr(),
+      MatchesRegex(
+          ".+T.+Z \\[info\\] \\[logging.+:.+\\] \\[MyCtx\\] 9999 9999\nDESTROY\nDESTROY\n"));
+}