Fix mixer testing setup

ROMFS/px4fmu_common/mixers/quad_test.mix

+Multirotor mixer for TEST
+===========================
+
+This file defines a single mixer for a quadrotor with a wide configuration.  All controls are mixed 100%.
+
+R: 4w 10000 10000 10000 0
+
+Gimbal / payload mixer for last four channels
+-----------------------------------------------------
+
+M: 1
+O:      10000  10000      0 -10000  10000
+S: 0 4  10000  10000      0 -10000  10000
+
+M: 1
+O:      10000  10000      0 -10000  10000
+S: 0 5  10000  10000      0 -10000  10000
+
+M: 1
+O:      10000  10000      0 -10000  10000
+S: 0 6  10000  10000      0 -10000  10000
+
+M: 1
+O:      10000  10000      0 -10000  10000
+S: 0 7  10000  10000      0 -10000  10000

src/systemcmds/tests/test_mixer.cpp

@@ -402,7 +402,7 @@ int test_mixer(int argc, char *argv[])
 		filename = argv[2];
 
 	} else {
-		filename = "/etc/mixers/quad_w.main.mix";
+		filename = "/etc/mixers/quad_test.mix";
 	}
 
 	load_mixer_file(filename, &buf[0], sizeof(buf));
@@ -414,8 +414,8 @@ int test_mixer(int argc, char *argv[])
 	mixer_group.load_from_buf(&buf[0], mc_loaded);
 	PX4_INFO("complete buffer load: loaded %u mixers", mixer_group.count());
 
-	if (mixer_group.count() != 3) {
-		PX4_ERR("FAIL: Quad W mixer load failed");
+	if (mixer_group.count() != 5) {
+		PX4_ERR("FAIL: Quad test mixer load failed");
 		return 1;
 	}
 

unittests/mixer_test.cpp

@@ -7,6 +7,6 @@
 
 TEST(MixerTest, Mixer)
 {
-	const char *args[] = {"empty", "../ROMFS/px4fmu_common/mixers/IO_pass.mix", "../ROMFS/px4fmu_common/mixers/sk450_deadcat.main.mix"};
+	const char *args[] = {"empty", "../ROMFS/px4fmu_common/mixers/IO_pass.mix", "../ROMFS/px4fmu_common/mixers/quad_test.mix"};
 	ASSERT_EQ(test_mixer(3, (char **)args), 0) << "IO_pass.mix failed";
 }