Add macro to generate logging category declarations for Qt5.

This makes life a bit easier for developers who use the categorised
logging in Qt5 in the common case - rather than creating two new files,
and remembering to put in the #ifdef for the default verbosity settings
in Qt 5.4, they can just add a couple of lines to their CMakeLists.txt.

REVIEW: 124595

2 files changed, 125 insertions, 0 deletions

diff --git a/tests/ECMQtDeclareLoggingCategoryTest/CMakeLists.txt b/tests/ECMQtDeclareLoggingCategoryTest/CMakeLists.txt
new file mode 100644
index 00000000..15ece187
--- /dev/null
+++ b/tests/ECMQtDeclareLoggingCategoryTest/CMakeLists.txt
@@ -0,0 +1,42 @@
+project(ECMQtDeclareLoggingCategoryTest)
+cmake_minimum_required(VERSION 2.8.12)
+set(ECM_MODULE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../modules")
+
+set(CMAKE_MODULE_PATH ${ECM_MODULE_DIR})
+
+include(ECMQtDeclareLoggingCategory)
+
+ecm_qt_declare_logging_category(
+    sources
+    HEADER "log1.h"
+    IDENTIFIER "log1"
+    CATEGORY_NAME "log.one"
+)
+
+ecm_qt_declare_logging_category(
+    sources
+    HEADER "log2.h"
+    IDENTIFIER "foo::bar::log2"
+    CATEGORY_NAME "log.two"
+)
+
+ecm_qt_declare_logging_category(
+    sources
+    HEADER "${CMAKE_CURRENT_BINARY_DIR}/log3.h"
+    IDENTIFIER "log3"
+    CATEGORY_NAME "three"
+    DEFAULT_SEVERITY Critical
+)
+
+find_package(Qt5Core REQUIRED)
+
+add_executable(testmain testmain.cpp ${sources})
+target_include_directories(testmain
+    PRIVATE
+        "${CMAKE_CURRENT_BINARY_DIR}"
+)
+target_link_libraries(testmain
+    PRIVATE
+        Qt5::Core
+)
+
diff --git a/tests/ECMQtDeclareLoggingCategoryTest/testmain.cpp b/tests/ECMQtDeclareLoggingCategoryTest/testmain.cpp
new file mode 100644
index 00000000..a06614a1
--- /dev/null
+++ b/tests/ECMQtDeclareLoggingCategoryTest/testmain.cpp
@@ -0,0 +1,83 @@
+#include <QCoreApplication>
+
+#include "log1.h"
+#include "log2.h"
+#include "log3.h"
+
+#include <iostream>
+
+int main(int argc, char **argv) {
+    QCoreApplication qapp(argc, argv);
+
+    bool success = true;
+
+    // NB: we cannot test against QtInfoMsg, as that (a) does not exist before
+    // Qt 5.5, and (b) has incorrect semantics in Qt 5.5, in that it is
+    // treated as more severe than QtCriticalMsg.
+
+    if (log1().categoryName() != QLatin1String("log.one")) {
+        qWarning("log1 category was \"%s\", expected \"log.one\"", log1().categoryName());
+        success = false;
+    }
+#if QT_VERSION < QT_VERSION_CHECK(5, 4, 0)
+    if (!log1().isDebugEnabled()) {
+        qWarning("log1 debug messages were not enabled");
+        success = false;
+    }
+#else
+    if (log1().isDebugEnabled()) {
+        qWarning("log1 debug messages were enabled");
+        success = false;
+    }
+    if (!log1().isWarningEnabled()) {
+        qWarning("log1 warning messages were not enabled");
+        success = false;
+    }
+#endif
+
+    if (foo::bar::log2().categoryName() != QLatin1String("log.two")) {
+        qWarning("log2 category was \"%s\", expected \"log.two\"", foo::bar::log2().categoryName());
+        success = false;
+    }
+#if QT_VERSION < QT_VERSION_CHECK(5, 4, 0)
+    if (!foo::bar::log2().isDebugEnabled()) {
+        qWarning("log2 debug messages were not enabled");
+        success = false;
+    }
+#else
+    if (foo::bar::log2().isDebugEnabled()) {
+        qWarning("log2 debug messages were enabled");
+        success = false;
+    }
+    if (!foo::bar::log2().isWarningEnabled()) {
+        qWarning("log2 warning messages were not enabled");
+        success = false;
+    }
+#endif
+
+    if (log3().categoryName() != QLatin1String("three")) {
+        qWarning("log3 category was \"%s\", expected \"three\"", log3().categoryName());
+        success = false;
+    }
+#if QT_VERSION < QT_VERSION_CHECK(5, 4, 0)
+    if (!log3().isDebugEnabled()) {
+        qWarning("log3 debug messages were not enabled");
+        success = false;
+    }
+#else
+    if (log3().isDebugEnabled()) {
+        qWarning("log3 debug messages were enabled");
+        success = false;
+    }
+    if (log3().isWarningEnabled()) {
+        qWarning("log3 warning messages were enabled");
+        success = false;
+    }
+    if (!log3().isCriticalEnabled()) {
+        qWarning("log3 critical messages were not enabled");
+        success = false;
+    }
+#endif
+
+    return success ? 0 : 1;
+}