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Location: NPO-Accounting/import2ledger/tests/test_hook_ledger_entry.py

Brett Smith
hooks.ledger_entry: Look up templates dynamically.

If there's a 'ledger entry' key in the entry data, use that value as the
name of the template to load. Thanks to this, nbpy2017 could collapse
multiple importers into one.

Otherwise, build a default template name based on the importer source, and
try to use that.

All the configuration names now end with "ledger entry" instead of starting
with "template". This makes it clearer what they're for, in case we
support other kinds of output templates in the future.

I ended up changing the names of some of the importers so the default
template name was nice, rather than specifying template names for all of
them, to reduce the amount of name discrepancies across the codebase.
import collections
import configparser
import contextlib
import datetime
import decimal
import io
import pathlib

import pytest
from import2ledger import errors
from import2ledger.hooks import ledger_entry

from . import DATA_DIR, normalize_whitespace

DATE = datetime.date(2015, 3, 14)

config = configparser.ConfigParser(comment_prefixes='#')
with pathlib.Path(DATA_DIR, 'templates.ini').open() as conffile:
    config.read_file(conffile)

def template_from(section_name, *args, **kwargs):
    return ledger_entry.Template(config[section_name]['template'], *args, **kwargs)

def template_vars(payee, amount, currency='USD', date=DATE, other_vars=None):
    call_vars = {
        'amount': decimal.Decimal(amount),
        'currency': currency,
        'date': date,
        'payee': payee,
        'ledger template': 'template',
    }
    if other_vars is None:
        return call_vars
    else:
        return collections.ChainMap(call_vars, other_vars)

def render_lines(render_vars, section_name, *args, **kwargs):
    tmpl = template_from(section_name, *args, **kwargs)
    rendered = tmpl.render(render_vars)
    return [normalize_whitespace(s) for s in rendered.splitlines()]

def assert_easy_render(tmpl, entity, amount, currency, expect_date, expect_amt):
    rendered = tmpl.render(template_vars(entity, amount, currency))
    lines = [normalize_whitespace(s) for s in rendered.splitlines()]
    assert lines == [
        "",
        "{} {}".format(expect_date, entity),
        "  Accrued:Accounts Receivable  " + expect_amt,
        "  Income:Donations  " + expect_amt.replace(amount, "-" + amount),
    ]
    assert not tmpl.is_empty()

def test_easy_template():
    tmpl = template_from('Simplest')
    assert_easy_render(tmpl, 'JJ', '5.99', 'CAD', '2015/03/14', '5.99 CAD')

def test_date_formatting():
    tmpl = template_from('Simplest', date_fmt='%Y-%m-%d')
    assert_easy_render(tmpl, 'KK', '6.99', 'CAD', '2015-03-14', '6.99 CAD')

def test_currency_formatting():
    tmpl = template_from('Simplest', signed_currencies=['USD'])
    assert_easy_render(tmpl, 'CC', '7.99', 'USD', '2015/03/14', '$7.99')

def test_empty_template():
    tmpl = ledger_entry.Template("\n \n")
    assert tmpl.render(template_vars('BB', '8.99')) == ''
    assert tmpl.is_empty()

def test_complex_template():
    render_vars = template_vars('TT', '125.50', other_vars={
        'entity': 'T-T',
        'program': 'Spectrum Defense',
        'txid': 'ABCDEF',
    })
    lines = render_lines(
        render_vars, 'Complex',
        date_fmt='%Y-%m-%d',
        signed_currencies=['USD'],
    )
    assert lines == [
        "",
        "2015-03-14 TT",
        "  ;Tag: Value",
        "  ;TransactionID: ABCDEF",
        "  Accrued:Accounts Receivable  $125.50",
        "  ;Entity: Supplier",
        "  Income:Donations:Spectrum Defense  $-119.85",
        "  ;Program: Spectrum Defense",
        "  ;Entity: T-T",
        "  Income:Donations:General  $-5.65",
        "  ;Entity: T-T",
    ]

def test_balancing():
    lines = render_lines(template_vars('FF', '1.01'), 'FiftyFifty')
    assert lines == [
        "",
        "2015/03/14 FF",
        "  Accrued:Accounts Receivable  1.01 USD",
        "  Income:Donations  -0.50 USD",
        "  Income:Sales  -0.51 USD",
    ]

def test_multivalue():
    render_vars = template_vars('DD', '150.00', other_vars={
        'tax': decimal.Decimal('12.50'),
    })
    lines = render_lines(render_vars, 'Multivalue')
    assert lines == [
        "",
        "2015/03/14 DD",
        "  Expenses:Taxes  12.50 USD",
        "  ;TaxAuthority: IRS",
        "  Accrued:Accounts Receivable  137.50 USD",
        "  Income:RBI  -15.00 USD",
        "  Income:Donations  -135.00 USD",
    ]

def test_zeroed_account_skipped():
    render_vars = template_vars('GG', '110.00', other_vars={
        'tax': decimal.Decimal(0),
    })
    lines = render_lines(render_vars, 'Multivalue')
    assert lines == [
        "",
        "2015/03/14 GG",
        "  Accrued:Accounts Receivable  110.00 USD",
        "  Income:RBI  -11.00 USD",
        "  Income:Donations  -99.00 USD",
    ]

def test_zeroed_account_last():
    render_vars = template_vars('JJ', '90.00', other_vars={
        'item_sales': decimal.Decimal(0),
    })
    lines = render_lines(render_vars, 'Multisplit')
    assert lines == [
        "",
        "2015/03/14 JJ",
        "  Assets:Cash  90.00 USD",
        "  Income:Sales  -90.00 USD",
        "  ; :NonItem:",
    ]

def test_multiple_postings_same_account():
    render_vars = template_vars('LL', '80.00', other_vars={
        'item_sales': decimal.Decimal(30),
    })
    lines = render_lines(render_vars, 'Multisplit')
    assert lines == [
        "",
        "2015/03/14 LL",
        "  Assets:Cash  80.00 USD",
        "  Income:Sales  -50.00 USD",
        "  ; :NonItem:",
        "  Income:Sales  -30.00 USD",
        "  ; :Item:",
    ]

def test_custom_payee_line():
    render_vars = template_vars('ZZ', '10.00', other_vars={
        'custom_date': datetime.date(2014, 2, 13),
    })
    lines = render_lines(render_vars, 'Custom Payee')
    assert lines == [
        "",
        "2014/02/13  ZZ - Custom",
        "  Accrued:Accounts Receivable  10.00 USD",
        "  Income:Donations  -10.00 USD",
    ]

def test_line1_not_custom_payee():
    render_vars = template_vars('VV', '15.00', other_vars={
        'custom_date': datetime.date(2014, 2, 12),
    })
    lines = render_lines(render_vars, 'Simplest')
    assert lines == [
        "",
        "2015/03/14 VV",
        "  Accrued:Accounts Receivable  15.00 USD",
        "  Income:Donations  -15.00 USD",
    ]

@pytest.mark.parametrize('amount_expr', [
    '',
    'name',
    '-',
    '()',
    '+()',
    '{}',
    '{{}}',
    '{()}',
    '{name',
    'name}',
    '{42}',
    '(5).real',
    '{amount.real}',
    '{amount.is_nan()}',
    '{Decimal}',
    '{FOO}',
])
def test_bad_amount_expression(amount_expr):
    with pytest.raises(errors.UserInputError):
        ledger_entry.Template(" Income  " + amount_expr)

class Config:
    def __init__(self, use_section):
        self.section_name = use_section
        self.stdout = io.StringIO()

    @contextlib.contextmanager
    def open_output_file(self):
        yield self.stdout

    def get_section(self, name=None):
        return config[self.section_name]


def run_hook(entry_data, config_section):
    hook_config = Config(config_section)
    hook = ledger_entry.LedgerEntryHook(hook_config)
    assert hook.run(entry_data) is None
    stdout = hook_config.stdout.getvalue()
    return normalize_whitespace(stdout).splitlines()

def test_hook_renders_template():
    entry_data = template_vars('BB', '0.99')
    lines = run_hook(entry_data, 'Simplest')
    assert lines == [
        "",
        "2015-03-14 BB",
        "  Accrued:Accounts Receivable  $0.99",
        "  Income:Donations  -$0.99",
    ]

def test_hook_handles_empty_template():
    entry_data = template_vars('CC', 1)
    assert not run_hook(entry_data, 'Empty')

def test_hook_handles_template_undefined():
    entry_data = template_vars('DD', 1)
    assert not run_hook(entry_data, 'Nonexistent')