adds new HOST_OS_GENERIC_EXECUTABLE constant and adds error handling if the executable doesn't exist in the path provided

Tools/LyTestTools/ly_test_tools/__init__.py

@@ -37,6 +37,7 @@ if WINDOWS:
     HOST_OS_PLATFORM = 'windows'
     HOST_OS_EDITOR = 'windows_editor'
     HOST_OS_DEDICATED_SERVER = 'windows_dedicated'
+    HOST_OS_GENERIC_EXECUTABLE = 'windows_generic'
     import ly_test_tools.mobile.android
     from ly_test_tools.launchers import (
         AndroidLauncher, WinLauncher, DedicatedWinLauncher, WinEditor, WinGenericLauncher)

Tools/LyTestTools/ly_test_tools/_internal/pytest_plugin/test_tools_fixtures.py

@@ -29,7 +29,7 @@ import ly_test_tools.environment.file_system
 import ly_test_tools.launchers.launcher_helper
 import ly_test_tools.launchers.platforms.base
 import ly_test_tools.environment.watchdog
-from ly_test_tools import ALL_PLATFORM_OPTIONS, HOST_OS_PLATFORM
+from ly_test_tools import ALL_PLATFORM_OPTIONS, HOST_OS_PLATFORM, HOST_OS_GENERIC_EXECUTABLE
 
 logger = logging.getLogger(__name__)
 
@@ -287,7 +287,7 @@ def generic_launcher(workspace, request, crash_log_watchdog):
     # type: (...) -> ly_test_tools.launchers.platforms.base.Launcher
     return _generic_launcher(
         workspace=workspace,
-        launcher_platform=get_fixture_argument(request, 'launcher_platform', HOST_OS_PLATFORM),
+        launcher_platform=get_fixture_argument(request, 'launcher_platform', HOST_OS_GENERIC_EXECUTABLE),
         exe_file_name=get_fixture_argument(request, 'exe_file_name', ''))
 
 

Tools/LyTestTools/ly_test_tools/launchers/launcher_helper.py

@@ -75,5 +75,5 @@ def create_generic_launcher(workspace, launcher_platform, exe_file_name, args=No
     :param args: List of arguments to pass to the launcher's 'args' argument during construction
     :return: Launcher instance.
     """
-    launcher_class = ly_test_tools.LAUNCHERS.get(launcher_platform, ly_test_tools.HOST_OS_PLATFORM)
+    launcher_class = ly_test_tools.LAUNCHERS.get(launcher_platform, ly_test_tools.HOST_OS_GENERIC_EXECUTABLE)
     return launcher_class(workspace, exe_file_name, args)

Tools/LyTestTools/ly_test_tools/launchers/platforms/win/launcher.py

@@ -210,12 +210,21 @@ class WinGenericLauncher(WinLauncher):
     def __init__(self, build, exe_file_name, args=None):
         super(WinGenericLauncher, self).__init__(build, args)
         self.exe_file_name = exe_file_name
+        self.expected_executable_path = os.path.join(
+            self.workspace.paths.build_directory(), f"{self.exe_file_name}.exe")
+
+        if not os.path.exists(self.expected_executable_path):
+            raise ProcessNotStartedError(
+                f"Unable to locate executable '{self.exe_file_name}.exe' "
+                f"in path: '{self.expected_executable_path}'")
 
     def binary_path(self):
         """
         Return full path to the .exe file for this build's configuration and project
+        Relies on the build_directory() in self.workspace.paths to be accurate
 
         :return: full path to the given exe file
         """
-        assert self.workspace.project is not None
-        return os.path.join(self.workspace.paths.build_directory(), f"{self.exe_file_name}.exe")
+        assert self.workspace.project is not None, (
+            'Project cannot be NoneType - please specify a project name string.')
+        return self.expected_executable_path