Add should_fail kwarg to test to indicate tests that should fail.

backends.py

@@ -87,7 +87,7 @@ def do_conf_file(src, dst, confdata):
 
 class TestSerialisation:
     def __init__(self, name, fname, is_cross, exe_wrapper, is_parallel, cmd_args, env,
-                 valgrind_args):
+                 should_fail, valgrind_args):
         self.name = name
         self.fname = fname
         self.is_cross = is_cross
@@ -95,6 +95,7 @@ class TestSerialisation:
         self.is_parallel = is_parallel
         self.cmd_args = cmd_args
         self.env = env
+        self.should_fail = should_fail
         self.valgrind_args = valgrind_args
 
 # This class contains the basic functionality that is needed by all backends.
@@ -315,7 +316,7 @@ class Backend():
             else:
                 exe_wrapper = None
             ts = TestSerialisation(t.get_name(), fname, is_cross, exe_wrapper,
-                                   t.is_parallel, t.cmd_args, t.env, t.valgrind_args)
+                                   t.is_parallel, t.cmd_args, t.env, t.should_fail, t.valgrind_args)
             arr.append(ts)
         pickle.dump(arr, datafile)
 

interpreter.py

@@ -429,13 +429,14 @@ class RunTargetHolder(InterpreterObject):
         self.held_object = build.RunTarget(name, command, args, subdir)
 
 class Test(InterpreterObject):
-    def __init__(self, name, exe, is_parallel, cmd_args, env, valgrind_args):
+    def __init__(self, name, exe, is_parallel, cmd_args, env, should_fail, valgrind_args):
         InterpreterObject.__init__(self)
         self.name = name
         self.exe = exe
         self.is_parallel = is_parallel
         self.cmd_args = cmd_args
         self.env = env
+        self.should_fail = should_fail
         self.valgrind_args = valgrind_args
 
     def get_exe(self):
@@ -1310,7 +1311,10 @@ class Interpreter():
         for a in valgrind_args:
             if not isinstance(a, str):
                 raise InterpreterException('Valgrind_arg not a string.')
-        t = Test(args[0], args[1].held_object, par, cmd_args, env, valgrind_args)
+        should_fail = kwargs.get('should_fail', False)
+        if not isinstance(should_fail, bool):
+            raise InterpreterException('Keyword argument should_fail must be a boolean.')
+        t = Test(args[0], args[1].held_object, par, cmd_args, env, should_fail, valgrind_args)
         self.build.tests.append(t)
         mlog.debug('Adding test "', mlog.bold(args[0]), '".', sep='')
 

meson_test.py

@@ -99,7 +99,8 @@ def run_single_test(wrap, test):
         duration = endtime - starttime
         stdo = stdo.decode()
         stde = stde.decode()
-        if p.returncode == 0:
+        if (not test.should_fail and p.returncode == 0) or \
+            (test.should_fail and p.returncode != 0):
             res = 'OK'
         else:
             res = 'FAIL'

test cases/common/75 should fail/failing.c

@@ -0,0 +1,3 @@
+int main(int argc, char **argv) {
+    return 1;
+}

test cases/common/75 should fail/meson.build

@@ -0,0 +1,4 @@
+project('should fail', 'c')
+
+exe = executable('prog', 'failing.c')
+test('failing', exe, should_fail : true)