unittests: add and use get_meson_log_raw function

This is like get_meson_log but returns the whole contents
not split into individual lines.

unittests/baseplatformtests.py

@@ -322,6 +322,10 @@ class BasePlatformTests(TestCase):
                     each['command'] = compiler + ' ' + f.read()
         return contents
 
+    def get_meson_log_raw(self):
+        with self._open_meson_log() as f:
+            return f.read()
+
     def get_meson_log(self):
         with self._open_meson_log() as f:
             return f.readlines()

unittests/linuxliketests.py

@@ -345,12 +345,12 @@ class LinuxlikeTests(BasePlatformTests):
         testdir = os.path.join(self.framework_test_dir, '4 qt')
         self.init(testdir, extra_args=['-Dmethod=pkg-config'])
         # Confirm that the dependency was found with pkg-config
-        mesonlog = self.get_meson_log()
+        mesonlog = self.get_meson_log_raw()
         if qt4 == 0:
-            self.assertRegex('\n'.join(mesonlog),
+            self.assertRegex(mesonlog,
                              r'Run-time dependency qt4 \(modules: Core\) found: YES 4.* \(pkg-config\)')
         if qt5 == 0:
-            self.assertRegex('\n'.join(mesonlog),
+            self.assertRegex(mesonlog,
                              r'Run-time dependency qt5 \(modules: Core\) found: YES 5.* \(pkg-config\)')
 
     @skip_if_not_base_option('b_sanitize')
@@ -380,8 +380,8 @@ class LinuxlikeTests(BasePlatformTests):
         testdir = os.path.join(self.framework_test_dir, '4 qt')
         self.init(testdir, extra_args=['-Dmethod=qmake'])
         # Confirm that the dependency was found with qmake
-        mesonlog = self.get_meson_log()
-        self.assertRegex('\n'.join(mesonlog),
+        mesonlog = self.get_meson_log_raw()
+        self.assertRegex(mesonlog,
                          r'Run-time dependency qt5 \(modules: Core\) found: YES .* \(qmake\)\n')
 
     def test_qt6dependency_qmake_detection(self):
@@ -400,8 +400,8 @@ class LinuxlikeTests(BasePlatformTests):
         testdir = os.path.join(self.framework_test_dir, '4 qt')
         self.init(testdir, extra_args=['-Dmethod=qmake'])
         # Confirm that the dependency was found with qmake
-        mesonlog = self.get_meson_log()
-        self.assertRegex('\n'.join(mesonlog),
+        mesonlog = self.get_meson_log_raw()
+        self.assertRegex(mesonlog,
                          r'Run-time dependency qt6 \(modules: Core\) found: YES .* \(qmake\)\n')
 
     def glob_sofiles_without_privdir(self, g):

unittests/platformagnostictests.py

@@ -83,9 +83,8 @@ class PlatformAgnosticTests(BasePlatformTests):
         self.assertNotIn(log_msg, output)
 
         # Check if message is written to the meson log
-        mesonlog = os.path.join(self.builddir, 'meson-logs/meson-log.txt')
-        with open(mesonlog, mode='r', encoding='utf-8') as file:
-            self.assertIn(log_msg, file.read())
+        mesonlog = self.get_meson_log_raw()
+        self.assertIn(log_msg, mesonlog)
 
     def test_new_subproject_reconfigure(self):
         testdir = os.path.join(self.unit_test_dir, '107 new subproject on reconfigure')