tests: Add unit tests for communicate as back door user PBA

monkey/tests/unit_tests/infection_monkey/post_breach/actions/test_communicate_as_backdoor_user.py

@@ -0,0 +1,38 @@
+from infection_monkey.post_breach.actions.communicate_as_new_user import (
+    USERNAME_PREFIX,
+    CommunicateAsNewUser,
+)
+
+URL = "this-is-where-i-wanna-go"
+
+
+def test_get_random_new_user_name():
+    username = CommunicateAsNewUser.get_random_new_user_name()
+    assert len(username) == len(USERNAME_PREFIX) + 5
+    assert username.islower()
+    assert username.startswith(USERNAME_PREFIX)
+
+
+def test_get_commandline_for_http_request_windows():
+    cmd_line = CommunicateAsNewUser.get_commandline_for_http_request(URL, is_windows=True)
+    assert "powershell.exe" in cmd_line
+    assert URL in cmd_line
+
+
+def test_get_commandline_for_http_request_linux_curl(monkeypatch):
+    monkeypatch.setattr(
+        "infection_monkey.post_breach.actions.communicate_as_new_user.shutil.which",
+        lambda _: "not None",
+    )
+    cmd_line = CommunicateAsNewUser.get_commandline_for_http_request(URL, is_windows=False)
+    assert "curl" in cmd_line
+    assert URL in cmd_line
+
+
+def test_get_commandline_for_http_request_linux_wget(monkeypatch):
+    monkeypatch.setattr(
+        "infection_monkey.post_breach.actions.communicate_as_new_user.shutil.which", lambda _: None
+    )
+    cmd_line = CommunicateAsNewUser.get_commandline_for_http_request(URL, is_windows=False)
+    assert "wget" in cmd_line
+    assert URL in cmd_line