test_main.py

import unittest
from unittest.mock import patch
import main

class TestMainFunctions(unittest.TestCase):
    # The test_main function is testing the main function from the main module. 
    # It sets up a mock contract, calls the main function with the mock contract as input, 
    # and then checks that the output is as expected.
    @patch('main.Web3')
    def test_main(self, mock_web3):
        # Set up test data
        mock_web3.eth.contract.return_value = 'test_contract'
        
        # Call the function with test inputs
        result = main.main('test_contract')
        
        # Compare actual output with expected output using assertEqual
        self.assertEqual(result, 'expected_result')
    
    # The test_total_supply function is testing the total_supply function from the main module. 
    # It sets up a mock contract, calls the total_supply function with the mock contract as input, 
    # and then checks that the output is as expected.
    @patch('main.Web3')
    def test_total_supply(self, mock_web3):
        # Set up test data
        mock_web3.eth.contract.return_value = 'test_contract'
        
        # Call the function with test inputs
        result = main.total_supply('test_contract')
        
        # Compare actual output with expected output using assertEqual
        self.assertEqual(result, 'expected_result')
    
    # The test_write_to_csv function is testing the write_to_csv function from the main module. 
    # It sets up some test token owners and a test file name, calls the write_to_csv function 
    # with the test token owners and file name as input, and then checks that the file was written correctly.
    @patch('main.Web3')
    def test_write_to_csv(self, mock_web3):
        # Set up test data
        token_owners = {'1': 'wallet1', '2': 'wallet2'}
        file_name = 'test.csv'
        
        # Call the function with test inputs
        main.write_to_csv(token_owners, file_name)
        
        # Check if the file was written correctly
        with open(file_name, 'r') as f:
            content = f.read()
        self.assertEqual(content, 'expected_content')
    
    # The test_create_clean_snapshot function is testing the create_clean_snapshot function from the main module. 
    # It sets up a test input file and output file, calls the create_clean_snapshot function 
    # with the test input file and output file as input, and then checks that the output file was written correctly.
    @patch('main.Web3')
    def test_create_clean_snapshot(self, mock_web3):
        # Set up test data
        input_file = 'test_input.csv'
        output_file = 'test_output.csv'
        
        # Call the function with test inputs
        main.create_clean_snapshot(input_file, output_file)
        
        # Check if the file was written correctly
        with open(output_file, 'r') as f:
            content = f.read()
        self.assertEqual(content, 'expected_content')

if __name__ == '__main__':
    unittest.main()