Fixes to new disconnected tests; add a version that doesn't use MVC

bindings/c/CMakeLists.txt

@@ -183,7 +183,11 @@ if(NOT WIN32)
     NAME disconnected_timeout_unit_tests
     COMMAND $<TARGET_FILE:disconnected_timeout_unit_tests>
             @CLUSTER_FILE@
-            fdb
+            )
+  add_unavailable_fdbclient_test(
+    NAME disconnected_timeout_external_client_unit_tests
+    COMMAND $<TARGET_FILE:disconnected_timeout_unit_tests>
+            @CLUSTER_FILE@
             ${CMAKE_CURRENT_BINARY_DIR}/libfdb_c.so
             )
 endif()

tests/TestRunner/fake_cluster.py

@@ -7,6 +7,7 @@ import sys
 from local_cluster import LocalCluster
 from argparse import ArgumentParser, RawDescriptionHelpFormatter
 from pathlib import Path
+from random import choice
 
 class ClusterFileGenerator:
     def __init__(self, output_dir: str):
@@ -16,12 +17,12 @@ class ClusterFileGenerator:
         self.tmp_dir = self.output_dir.joinpath(
             'tmp',
             ''.join(choice(LocalCluster.valid_letters_for_secret) for i in range(16)))
-        tmp_dir.mkdir(parents=True)
+        self.tmp_dir.mkdir(parents=True)
         self.cluster_file_path = self.tmp_dir.joinpath('fdb.cluster')
 
     def __enter__(self):
         with open(self.cluster_file_path, 'x') as f:
-           f.write('foo:bar@1.1.1.1:5678')
+            f.write('foo:bar@1.1.1.1:5678\n')
 
         return self