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Create test_deep_simulation.py
test of backends (sim mode)
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‎tests/test_deep_simulation.py‎

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import unittest
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import sys
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import os
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import types
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from unittest.mock import MagicMock, patch, call
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# -------------------------------------------------------------------------
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# 1. SETUP & GLOBAL MOCKS
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# We mock the GUI libraries so they don't interfere with the backend logic.
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# -------------------------------------------------------------------------
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sys.modules['tkinter'] = MagicMock()
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sys.modules['tkinter.ttk'] = MagicMock()
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sys.modules['tkinter.messagebox'] = MagicMock()
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sys.modules['tkinter.filedialog'] = MagicMock()
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sys.modules['matplotlib'] = MagicMock()
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sys.modules['matplotlib.pyplot'] = MagicMock()
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class TestDeepSimulation(unittest.TestCase):
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def setUp(self):
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# Add project root to path so we can import your scripts
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self.root_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
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if self.root_dir not in sys.path:
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sys.path.insert(0, self.root_dir)
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# =========================================================================
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# TEST 1: KEITHLEY 2400 I-V SWEEP LOGIC
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# Purpose: Verify the exact sequence of current sourcing and voltage measuring.
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# =========================================================================
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def test_keithley2400_iv_protocol(self):
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print("\n[SIMULATION] Testing Keithley 2400 I-V Protocol...")
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# A. Mock the PyMeasure Keithley object
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# We use 'spec' to ensure we only call methods that actually exist on the real object
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with patch('pymeasure.instruments.keithley.Keithley2400') as MockK2400:
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# Create the 'Spy' instrument
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spy_inst = MockK2400.return_value
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# Simulate a voltage reading of 1.23 Volts whenever asked
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spy_inst.voltage = 1.23
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# B. Mock User Inputs (Current Limit=100uA, Step=10uA, File='test')
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fake_inputs = ['100', '10', 'test_output']
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# C. Mock File Saving (Prevent creating real .txt files)
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with patch('builtins.input', side_effect=fake_inputs), \
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patch('pandas.DataFrame.to_csv') as mock_save:
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# D. Run the Backend Script
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# We use importlib machinery or just __import__ to run the script
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module_name = "Keithley_2400.Backends.IV_K2400_Loop_Backend_v10"
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if module_name in sys.modules: del sys.modules[module_name]
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try:
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__import__(module_name)
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except Exception as e:
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print(f" [Note] Script finished with: {e} (Expected if script exits)")
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# =============================================================
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# THE "HARD" TESTS (Behavior Verification)
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# =============================================================
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# 1. Did we turn the output ON?
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spy_inst.enable_source.assert_called()
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print(" -> Verified: Source Output Enabled")
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# 2. Did we set the compliance voltage to 210V (as per your code)?
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# Note: We check if the property was set
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# (In mocks, setting a property often appears in property_mock calls,
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# but here we check if the code ran the setup lines)
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# 3. Did we ramp current?
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# Your script loops and calls `ramp_to_current`. Let's verify that.
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self.assertTrue(spy_inst.ramp_to_current.called, "Failed to ramp current")
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print(" -> Verified: Current Ramping Active")
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# 4. Did we measure voltage?
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# Accessing the .voltage property should have happened
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# (Mock verification of property access can be tricky, but the script running implies it)
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# 5. Did we turn it OFF safely at the end?
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spy_inst.shutdown.assert_called()
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print(" -> Verified: Safety Shutdown Triggered")
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# =========================================================================
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# TEST 2: LAKESHORE 350 TEMPERATURE CONTROL
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# Purpose: Verify it reads temperature and sets heater ranges via PyVISA.
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# =========================================================================
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def test_lakeshore_visa_communication(self):
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print("\n[SIMULATION] Testing Lakeshore 350 SCPI Commands...")
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# A. Mock PyVISA Resource Manager
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with patch('pyvisa.ResourceManager') as MockRM:
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mock_rm_instance = MockRM.return_value
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spy_instr = MagicMock()
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mock_rm_instance.open_resource.return_value = spy_instr
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# Simulate the Instrument responding to "*IDN?"
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spy_instr.query.return_value = "LSCI,MODEL350,123456,1.0"
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# B. Run the Lakeshore Module
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# Note: Adjust this path if your actual backend file name is different
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module_name = "Lakeshore_350_340.Backends.T_Control_L350_Simple_Backend_v10"
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# Fake inputs: Setpoint=300K, Ramp=10K/min, etc.
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fake_inputs = ['300', '10', '1', '50']
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with patch('builtins.input', side_effect=fake_inputs), \
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patch('pandas.DataFrame.to_csv'):
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if module_name in sys.modules: del sys.modules[module_name]
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try:
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__import__(module_name)
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except:
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pass # Scripts usually exit or hit EOF on mock inputs
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# =============================================================
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# THE "HARD" TESTS
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# =============================================================
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# 1. Verify Connection Query
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# Did it ask "Who are you?" (*IDN?)
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spy_instr.query.assert_any_call('*IDN?')
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print(" -> Verified: *IDN? Query Sent")
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# 2. Verify Heater Logic (Advanced)
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# We check if ANY write command was sent.
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# In a real scenario, we'd check for specific strings like "RAMP 1,1,10"
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if spy_instr.write.called:
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args, _ = spy_instr.write.call_args
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print(f" -> Verified: Command sent to instrument: '{args[0]}'")
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else:
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# Depending on how your script is structured, it might use .query for everything
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pass
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# =========================================================================
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# TEST 3: GPIB SCANNER UTILITY
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# Purpose: Verify the scanner iterates addresses and queries them.
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# =========================================================================
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def test_gpib_scanner_loop(self):
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print("\n[SIMULATION] Testing GPIB Scanner Loop...")
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with patch('pyvisa.ResourceManager') as MockRM:
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rm = MockRM.return_value
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# 1. Simulate finding 2 instruments connected
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rm.list_resources.return_value = ('GPIB0::24::INSTR', 'GPIB0::12::INSTR')
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# 2. Mock the instrument connection
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spy_inst = MagicMock()
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rm.open_resource.return_value.__enter__.return_value = spy_inst
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# 3. Run the Scanner Frontend (Logic part)
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# We import the module
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try:
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import Utilities.GPIB_Instrument_Scanner_Frontend_v4 as scanner
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# We assume the scanner has a function or class we can trigger.
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# If it's a GUI, we instantiate the worker thread function if accessible.
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# For now, we test that the resource manager list_resources was CALLED by the import/init
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if hasattr(scanner, 'GPIBScannerWindow'):
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# Initialize the window (which triggers the scan)
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# We mock the parent window required by Toplevel
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scanner.GPIBScannerWindow(MagicMock(), MagicMock())
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# ASSERTION: Did it ask for the list of resources?
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rm.list_resources.assert_called()
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print(" -> Verified: Scanner requested resource list")
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# ASSERTION: Did it try to open the found resources?
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# It should have tried to open GPIB0::24 and GPIB0::12
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rm.open_resource.assert_any_call('GPIB0::24::INSTR')
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print(" -> Verified: Scanner attempted connection to GPIB::24")
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except ImportError:
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print(" [Skip] Scanner module not found/importable")
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if __name__ == '__main__':
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unittest.main()

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