refactor: make cli testing not depending on MAPDL. (#3678)

* refactor: make cli testing not depending on MAPDL.

* chore: adding changelog file 3678.added.md [dependabot-skip]

* test: improving test coverage

---------

Co-authored-by: pyansys-ci-bot <[email protected]>

doc/changelog.d/3678.added.md

@@ -0,0 +1 @@
+refactor: make cli testing not depending on MAPDL.

src/ansys/mapdl/core/cli/list_instances.py

@@ -36,7 +36,7 @@
     flag_value=True,
     type=bool,
     default=False,
-    help="Print only instances",
+    help="Do not print the child process, only the main processes (instances).",
 )
 @click.option(
     "--long",
@@ -72,6 +72,15 @@ def list_instances(instances, long, cmd, location) -> None:
     # Assuming all ansys processes have -grpc flag
     mapdl_instances = []
 
+    def is_grpc_based(proc):
+        cmdline = proc.cmdline()
+        return "-grpc" in cmdline
+
+    def get_port(proc):
+        cmdline = proc.cmdline()
+        ind_grpc = cmdline.index("-port")
+        return cmdline[ind_grpc + 1]
+
     def is_valid_process(proc):
         valid_status = proc.status() in [
             psutil.STATUS_RUNNING,
@@ -81,12 +90,7 @@ def is_valid_process(proc):
         valid_ansys_process = ("ansys" in proc.name().lower()) or (
             "mapdl" in proc.name().lower()
         )
-        # Early exit to avoid checking 'cmdline' of a protected process (raises psutil.AccessDenied)
-        if not valid_ansys_process:
-            return False
-
-        grpc_is_active = "-grpc" in proc.cmdline()
-        return valid_status and valid_ansys_process and grpc_is_active
+        return valid_status and valid_ansys_process and is_grpc_based(proc)
 
     for proc in psutil.process_iter():
         # Check if the process is running and not suspended
@@ -104,8 +108,6 @@ def is_valid_process(proc):
             continue
 
     # printing
-    table = []
-
     if long:
         cmd = True
         location = True
@@ -120,18 +122,10 @@ def is_valid_process(proc):
     if location:
         headers.append("Working directory")
 
-    def get_port(proc):
-        cmdline = proc.cmdline()
-        ind_grpc = cmdline.index("-port")
-        return cmdline[ind_grpc + 1]
-
-    def is_grpc_based(proc):
-        cmdline = proc.cmdline()
-        return "-grpc" in cmdline
-
     table = []
     for each_p in mapdl_instances:
-        if not each_p.ansys_instance or not is_grpc_based(each_p):
+        if instances and not each_p.ansys_instance:
+            # Skip child processes if only printing instances
             continue
 
         proc_line = []

src/ansys/mapdl/core/cli/start.py

@@ -281,7 +281,6 @@ def start(
         additional_switches=additional_switches,
         start_timeout=start_timeout,
         port=port,
-        license_server_check=license_server_check,
         license_type=license_type,
         version=version,
     )

src/ansys/mapdl/core/cli/stop.py

@@ -68,8 +68,6 @@ def stop(port: int, pid: Optional[int], all: bool) -> None:
     """
     import psutil
 
-    from ansys.mapdl.core.launcher import is_ansys_process
-
     PROCESS_OK_STATUS = [
         # List of all process status, comment out the ones that means that
         # process is not OK.
@@ -97,15 +95,11 @@ def stop(port: int, pid: Optional[int], all: bool) -> None:
         killed_ = False
         for proc in psutil.process_iter():
             try:
-                if (
-                    psutil.pid_exists(proc.pid)
-                    and proc.status() in PROCESS_OK_STATUS
-                    and is_ansys_process(proc)
-                ):
+                if _is_valid_ansys_process(PROCESS_OK_STATUS, proc):
                     # Killing "all"
                     if all:
                         try:
-                            proc.kill()
+                            _kill_process(proc)
                             killed_ = True
                         except psutil.NoSuchProcess:
                             pass
@@ -114,7 +108,7 @@ def stop(port: int, pid: Optional[int], all: bool) -> None:
                         # Killing by ports
                         if str(port) in proc.cmdline():
                             try:
-                                proc.kill()
+                                _kill_process(proc)
                                 killed_ = True
                             except psutil.NoSuchProcess:
                                 pass
@@ -154,8 +148,9 @@ def stop(port: int, pid: Optional[int], all: bool) -> None:
 
         p = psutil.Process(pid)
         for child in p.children(recursive=True):
-            child.kill()
-        p.kill()
+            _kill_process(child)
+
+        _kill_process(p)
 
         if p.status == "running":
             click.echo(
@@ -168,3 +163,19 @@ def stop(port: int, pid: Optional[int], all: bool) -> None:
                 + f"The process with PID {pid} and its children have been stopped."
             )
         return
+
+
+def _kill_process(proc):
+    proc.kill()
+
+
+def _is_valid_ansys_process(PROCESS_OK_STATUS, proc):
+    import psutil
+
+    from ansys.mapdl.core.launcher import is_ansys_process
+
+    return (
+        psutil.pid_exists(proc.pid)
+        and proc.status() in PROCESS_OK_STATUS
+        and is_ansys_process(proc)
+    )