Cannot run-tests with --sandbox

[TingPing]

I'm not sure why this is limited but it is a pretty big restriction that doesn't make sense to me.

[alexlarsson]

I don't think it is disallowed. specifying test-args is, but that is just how you would get --share=network into the tests for instance, which obviously isn't compatible with sandboxing.

[TingPing]

A the time (its been a year..) it errored out-right.

[Unrud]

I don't think it is disallowed.

@alexlarsson It's a bug:

flatpak-builder/src/builder-options.c

Lines 1206 to 1207 in ae29d86

	/* Always run tests readonly */
	g_ptr_array_add (array, g_strdup ("--readonly"));

flatpak-builder/src/builder-options.c

Lines 1220 to 1224 in ae29d86

	if (array->len > 0 && builder_context_get_sandboxed (context))
	{
	g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "Can't specify test-args in sandboxed build");
	return NULL;
	}

array->len > 0 is always true because the array always contains at least the --readonly argument.