#!/usr/bin/env python3 import os import sys import unittest sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "utils"))) from class_process import Process class ProcessTest(unittest.TestCase): """Unit test for Process class""" def setUp(self): """Sets up base_data with example config data""" self._base_data = { "tech_nm": 7, "voltage": 0.7, "metal_prefix": "M", "metal_layer": "M4", "pin_width_nm": 24, "pin_pitch_nm": 48, "metal_track_pitch_nm": 48, "contacted_poly_pitch_nm": 54, "column_mux_factor": 1, "fin_pitch_nm": 27, "manufacturing_grid_nm": 1, "snap_width_nm": 190, "snap_height_nm": 1400, } def test_process(self): """Tests process fields based on example config""" process = Process(self._base_data) self.assertIsNotNone(process) self.assertEqual(process.get_tech_nm(), self._base_data["tech_nm"]) self.assertTrue(isinstance(process.get_voltage(), float)) self.assertEqual(process.get_voltage(), self._base_data["voltage"]) self.assertEqual(process.get_metal_prefix(), self._base_data["metal_prefix"]) self.assertEqual(process.get_metal_layer(), self._base_data["metal_layer"]) self.assertEqual(process.get_pin_width_nm(), self._base_data["pin_width_nm"]) self.assertEqual(process.get_pin_pitch_nm(), self._base_data["pin_pitch_nm"]) self.assertEqual( process.get_metal_track_pitch_nm(), self._base_data["metal_track_pitch_nm"] ) self.assertEqual( process.get_contacted_poly_pitch(), self._base_data["contacted_poly_pitch_nm"], ) self.assertEqual(process.get_fin_pitch(), self._base_data["fin_pitch_nm"]) self.assertEqual( process.get_manufacturing_grid_nm(), self._base_data["manufacturing_grid_nm"], ) self.assertEqual(process.get_snap_width_nm(), self._base_data["snap_width_nm"]) self.assertEqual( process.get_snap_height_nm(), self._base_data["snap_height_nm"] ) # check nm -> um self.assertEqual(process.get_tech_um(), process.get_tech_nm() / 1000.0) self.assertEqual( process.get_pin_width_um(), process.get_pin_width_nm() / 1000.0 ) self.assertEqual( process.get_pin_pitch_um(), process.get_pin_pitch_nm() / 1000.0 ) self.assertEqual( process.get_metal_track_pitch_um(), process.get_metal_track_pitch_nm() / 1000.0, ) self.assertEqual( process.get_manufacturing_grid_um(), process.get_manufacturing_grid_nm() / 1000.0, ) self.assertEqual( process.get_column_mux_factor(), self._base_data["column_mux_factor"] ) def test_process_optional_snap(self): """Tests defaulting when snap_width and snap_height are not defined""" process_data = self._base_data.copy() del process_data["snap_width_nm"] del process_data["snap_height_nm"] process = Process(process_data) self.assertEqual(process.get_tech_nm(), self._base_data["tech_nm"]) self.assertEqual(process.get_voltage(), float(self._base_data["voltage"])) self.assertEqual(process.get_metal_prefix(), self._base_data["metal_prefix"]) self.assertEqual(process.get_metal_layer(), self._base_data["metal_layer"]) self.assertEqual(process.get_pin_width_nm(), self._base_data["pin_width_nm"]) self.assertEqual(process.get_pin_pitch_nm(), self._base_data["pin_pitch_nm"]) self.assertEqual( process.get_metal_track_pitch_nm(), self._base_data["metal_track_pitch_nm"] ) self.assertEqual( process.get_contacted_poly_pitch(), self._base_data["contacted_poly_pitch_nm"], ) self.assertEqual(process.get_fin_pitch(), self._base_data["fin_pitch_nm"]) self.assertEqual( process.get_manufacturing_grid_nm(), self._base_data["manufacturing_grid_nm"], ) self.assertEqual(process.get_snap_width_nm(), 1) self.assertEqual(process.get_snap_height_nm(), 1) self.assertEqual(process.get_x_offset(), process.get_pin_pitch_um()) self.assertEqual(process.get_y_offset(), process.get_pin_pitch_um()) self.assertEqual( process.get_y_step(), process.get_y_offset() - (process.get_y_offset() % process.get_manufacturing_grid_um()) + (process.get_pin_width_um() / 2.0), ) def test_process_misaligned_pin_mfg_grid_pitch(self): """ Tests detection that pin pitch is not a multiple of the metal track pitch """ process_data = self._base_data.copy() process_data["pin_pitch_nm"] = 54 process_data["metal_track_pitch_nm"] = 6 process_data["manufacturing_grid_nm"] = 5 with self.assertRaises(Exception): process = Process(process_data) def test_process_misaligned_pin_track_pitch(self): """ Tests detection that pin pitch is not a multiple of the metal track pitch """ process_data = self._base_data.copy() process_data["pin_pitch_nm"] = 54 process_data["metal_track_pitch_nm"] = 5 with self.assertRaises(Exception): process = Process(process_data) def test_bitcell_override(self): """Tests when bitcell size overrides computation""" process_data = self._base_data.copy() process_data["bitcell_width_um"] = 123.0 process_data["bitcell_height_um"] = 456.0 process = Process(process_data) self.assertTrue(process.has_defined_bitcell_size()) bitcell_width, bitcell_height = process.get_bitcell_dimensions() self.assertEqual(bitcell_width, process_data["bitcell_width_um"]) self.assertEqual(bitcell_height, process_data["bitcell_height_um"]) def test_y_step_calc(self): """ Tests y_step calculation y_step = pin_pitch (snapped to grid) + pin_width / 2 """ process = Process(self._base_data) process._calc_y_step() # 0.048 + (0.024 / 2) = 0.06 self.assertEqual(process.get_y_step(), 0.06) # change to different pitch that previously didn't get snapped right # and try again base_data = self._base_data.copy() base_data["metal_track_pitch_nm"] = 23 base_data["pin_pitch_nm"] = 2 * base_data["metal_track_pitch_nm"] base_data["pin_width_nm"] = 12 process = Process(base_data) # 0.046 + (0.024 / 2) = 0.06 process._calc_y_step() self.assertEqual(process.get_y_step(), 0.052) if __name__ == "__main__": unittest.main()