Revert "test_superfaktura_api: add type ignore for pytest"

This reverts commit d0147a0451.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,38 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+ - Device: [e.g. iPhone6]
+ - OS: [e.g. iOS8.1]
+ - Browser [e.g. stock browser, safari]
+ - Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/deploy-docs.yml

@@ -0,0 +1,33 @@
+name: Deploy Sphinx Documentation
+
+on: [push]
+permissions:
+  contents: write
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+
+      - name: Install dependencies
+        run: |
+          pip install sphinx sphinx-rtd-theme
+          pip install -e .
+
+      - name: Build documentation
+        run: |
+          make -C docs html
+          touch docs/build/html/.nojekyll
+
+      - name: Deploy to GitHub Pages
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: gh-pages
+          folder: docs/build/html

.github/workflows/mypy.yml

@@ -0,0 +1,24 @@
+name: MyPy Type Checking
+
+on: [push]
+
+jobs:
+  type-check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements_dev.txt
+
+      - name: Run MyPy
+        run: mypy .

.github/workflows/pylint.yml

@@ -0,0 +1,48 @@
+name: Pylint
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pylint
+    - name: pylint
+      run: |
+        pylint $(git ls-files '*.py' | grep -v '^test/') --fail-under=9.0 --output-format=json > pylint-report.json
+
+    - name: Generate Pylint Score
+      id: pylint_score
+      run: |
+        SCORE=$(cat pylint-report.json | jq '[.[].score] | add / length' || echo 0)
+        echo "score=${SCORE:-0}" >> $GITHUB_ENV
+
+    - name: Upload Pylint Report
+      uses: actions/upload-artifact@v4
+      with:
+        name: pylint-report
+        path: pylint-report.json
+
+    - name: Create Pylint Badge
+      run: |
+        SCORE=$(echo "${{ env.score }}" | awk '{print int($1)}')
+        COLOR="red"
+        if [ "$SCORE" -ge 8 ]; then COLOR="green"; elif [ "$SCORE" -ge 5 ]; then COLOR="yellow"; fi
+        curl -o pylint-badge.svg "https://img.shields.io/badge/Pylint-$SCORE%2F10-$COLOR"
+
+    - name: Upload Pylint Badge
+      uses: actions/upload-artifact@v4
+      with:
+        name: pylint-badge
+        path: pylint-badge.svg

.github/workflows/pytest.yml

@@ -0,0 +1,29 @@
+name: PyTest
+
+on: [push]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.10'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements_dev.txt
+    - name: Test with pytest
+      run: |
+        mkdir -p junit
+        pytest test/ --doctest-modules --junitxml=junit/test-results.xml --cov=superfaktura --cov-report=xml --cov-report=html
+    - name: Upload pytest test results
+      uses: actions/upload-artifact@v4
+      with:
+        name: pytest-results
+        path: junit/test-results.xml
+      # Use always() to always run this step to publish test results when there are test failures
+      if: ${{ always() }}

.github/workflows/python-package.yml

@@ -0,0 +1,37 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+
+name: Python package
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.9", "3.10", "3.11"]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics

LICENSE

@@ -1,674 +1,21 @@
-                    GNU GENERAL PUBLIC LICENSE
+MIT License
-                       Version 3, 29 June 2007
+
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- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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README.md

@@ -1,5 +1,9 @@
 # SuperFaktura API client
 
+![Pylint Score](https://github.com/eledio-helpers/superfaktura-client/actions/workflows/pylint.yml/badge.svg)
+
+[Online documentation](https://eledio.github.io/superfaktura-client)
+
 Library for handling of SuperFaktura API.
 
 Environment variables:

docs/Makefile

@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = source
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/make.bat

@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=source
+set BUILDDIR=build
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd

docs/source/conf.py

@@ -0,0 +1,35 @@
+# type: ignore
+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+import os
+import sys
+
+sys.path.insert(0, os.path.abspath("../.."))
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+
+project = "SuperFaktura API client"
+copyright = "2025, Richard Kubíček, Eledio s.r.o."
+author = "Richard Kubíček"
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.napoleon",
+    "sphinx.ext.autosummary",
+]
+
+templates_path = ["_templates"]
+exclude_patterns = []
+
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = "sphinx_rtd_theme"
+html_static_path = ["_static"]

docs/source/examples.rst

@@ -0,0 +1,19 @@
+Examples of SuperFaktura API client usage
+====================
+
+
+Add Invoice
+---------------------------------
+
+.. automodule:: examples.add_invoice
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+Get country list
+------------------------------------
+
+.. automodule:: examples.get_country_list
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/index.rst

@@ -0,0 +1,9 @@
+Welcome to SuperFaktura Client's documentation
+=============================================
+
+.. toctree::
+   :maxdepth: 2
+
+   superfaktura
+   installation
+   examples

docs/source/installation.rst

@@ -0,0 +1,7 @@
+Installation
+====================
+
+To install SuperFaktura Client, run the following command::
+
+    pip install git+https://github.com/Eledio/superfaktura-client
+

docs/source/superfaktura.bank_account.rst

@@ -0,0 +1,7 @@
+superfaktura.bank\_account module
+=================================
+
+.. automodule:: superfaktura.bank_account
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.client_contacts.rst

@@ -0,0 +1,7 @@
+superfaktura.client\_contacts module
+====================================
+
+.. automodule:: superfaktura.client_contacts
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.enumerations.currency.rst

@@ -0,0 +1,7 @@
+superfaktura.enumerations.currency module
+=========================================
+
+.. automodule:: superfaktura.enumerations.currency
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.enumerations.rst

@@ -0,0 +1,21 @@
+superfaktura.enumerations package
+=================================
+
+Submodules
+----------
+
+superfaktura.enumerations.currency module
+-----------------------------------------
+
+.. automodule:: superfaktura.enumerations.currency
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+Module contents
+---------------
+
+.. automodule:: superfaktura.enumerations
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.invoice.rst

@@ -0,0 +1,7 @@
+superfaktura.invoice module
+===========================
+
+.. automodule:: superfaktura.invoice
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.rst

@@ -0,0 +1,35 @@
+SuperFaktura API client
+====================
+
+
+Bank account
+---------------------------------
+
+.. automodule:: superfaktura.bank_account
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+Client contacts
+------------------------------------
+
+.. automodule:: superfaktura.client_contacts
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+Invoice
+---------------------------
+
+.. automodule:: superfaktura.invoice
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+SuperFaktura API
+-------------------------------------
+
+.. automodule:: superfaktura.superfaktura_api
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.superfaktura_api.rst

@@ -0,0 +1,7 @@
+superfaktura.superfaktura\_api module
+=====================================
+
+.. automodule:: superfaktura.superfaktura_api
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.utils.country.rst

@@ -0,0 +1,7 @@
+superfaktura.utils.country module
+=================================
+
+.. automodule:: superfaktura.utils.country
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.utils.data_types.rst

@@ -0,0 +1,7 @@
+superfaktura.utils.data\_types module
+=====================================
+
+.. automodule:: superfaktura.utils.data_types
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/superfaktura.utils.rst

@@ -0,0 +1,29 @@
+superfaktura.utils package
+==========================
+
+Submodules
+----------
+
+superfaktura.utils.country module
+---------------------------------
+
+.. automodule:: superfaktura.utils.country
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+superfaktura.utils.data\_types module
+-------------------------------------
+
+.. automodule:: superfaktura.utils.data_types
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+Module contents
+---------------
+
+.. automodule:: superfaktura.utils
+   :members:
+   :undoc-members:
+   :show-inheritance:

examples/add_invoice.py

@@ -0,0 +1,87 @@
+"""
+Main script to add an invoice and save it as a PDF using the SuperFaktura API.
+
+This script demonstrates how to create an invoice with multiple items,
+retrieve the invoice as a PDF, and save the PDF to a file.
+
+Usage:
+    Run this script directly to create and save an invoice PDF.
+
+Dependencies:
+    - superfaktura.bank_account.BankAccount
+    - superfaktura.client_contacts.ClientContactModel
+    - superfaktura.enumerations.currency.Currencies
+    - superfaktura.enumerations.language.Language
+    - superfaktura.invoice.Invoice
+    - superfaktura.invoice.InvoiceModel
+    - superfaktura.invoice.InvoiceType
+    - superfaktura.invoice.InvoiceItem
+    - superfaktura.invoice.InvoiceSettings
+    - superfaktura.utils.data_types.Date
+"""
+
+from superfaktura.bank_account import BankAccount, NoDefaultBankAccountException
+from superfaktura.client_contacts import ClientContactModel
+from superfaktura.enumerations.currency import Currencies
+from superfaktura.enumerations.language import Language
+from superfaktura.invoice import (
+    Invoice,
+    InvoiceModel,
+    InvoiceType,
+    InvoiceItem,
+    InvoiceSettings,
+)
+from superfaktura.utils.data_types import Date
+
+
+def main():
+    """
+    Main function to add Invoice and save it as a pdf using the SuperFaktura API.
+    """
+    invoice = Invoice()
+    bank = BankAccount()
+    try:
+        # Get default bank account
+        bank_account = bank.default().as_dict()
+    except NoDefaultBankAccountException as e:
+        print(f"Error getting default bank account: {e}")
+        bank_account = {}
+    resp = invoice.add(
+        invoice_model=InvoiceModel(
+            type=InvoiceType.INVOICE,
+            name="My First Invoice",
+            due=Date("2025-04-01"),
+            invoice_currency=Currencies.EUR,
+            header_comment="We invoice you for services",
+            bank_accounts=[bank_account],
+        ),
+        items=[
+            InvoiceItem(
+                name="Website Development", unit_price=1000.0, quantity=1, tax=20
+            ),
+            InvoiceItem(
+                name="Hosting Service (1 year)", unit_price=500.0, quantity=1, tax=20
+            ),
+        ],
+        contact=ClientContactModel(
+            name="John Doe",
+            email="john.doe@examle.com",
+            phone="+1 555-1234",
+            address="123 Main Street, New York",
+            ico="987654321",
+            update=True,
+            country_id=225,
+        ),
+        invoice_settings=InvoiceSettings(language=Language.English),
+    )
+
+    try:
+        with open("invoice.pdf", "wb") as f:
+            invoice.get_pdf(invoice=resp, descriptor=f, language=Language.English)
+        print("Invoice saved to 'invoice.pdf'")
+    except Exception as e:
+        print(f"Error generating or saving invoice as PDF: {e}")
+
+
+if __name__ == "__main__":
+    main()

examples/get_country_list.py

@@ -0,0 +1,18 @@
+"""
+This script retrieves and prints the list of countries using the SuperFaktura API.
+"""
+
+from pprint import pprint
+
+from superfaktura.utils.country import country_list
+
+
+def main():
+    """
+    Main function to retrieve and print the list of countries using the SuperFaktura API.
+    """
+    pprint(country_list())
+
+
+if __name__ == "__main__":
+    main()

requirements.txt

@@ -1,2 +1,3 @@
 requests~=2.32.3
 python-dotenv~=1.0.1
+setuptools~=75.8.0

requirements_dev.txt

@@ -0,0 +1,7 @@
+requests~=2.32.3
+python-dotenv~=1.0.1
+pytest~=8.3.5
+pytest-cov~=6.0.0
+mypy~=1.9.0
+types-requests~=2.31
+types-setuptools~=68.2

ruff.toml

@@ -0,0 +1,5 @@
+[lint]
+ignore = [
+    # Use a single `if` statement instead of nested `if` statements
+    "SIM102",
+]

setup.py

@@ -1,15 +1,12 @@
 from setuptools import setup, find_namespace_packages
 
 setup(
-    name='superfaktura_client',
+    name="superfaktura_client",
-    version='0.1.0',
+    version="1.0.0",
     packages=find_namespace_packages(),
-    url='https://github.com/eledio-helpers/superfaktura-client',
+    url="https://github.com/eledio-helpers/superfaktura-client",
-    license='GNU GPLv3',
+    license="MIT",
-    author='Richard Kubíček',
+    author="Richard Kubíček",
-    author_email='kubicekr@eledio.com',
+    author_email="kubicekr@eledio.com",
-    install_requires=[
+    install_requires=["requests", "python-dotenv"],
-        "requests",
-        "python-dotenv"
-    ],
 )

superfaktura/bank_account.py

@@ -1,3 +1,32 @@
+"""
+Bank Account Module.
+
+This module provides classes and functions for working with bank accounts in the SuperFaktura API.
+It allows for retrieving, creating, updating, and deleting bank accounts.
+
+Classes:
+    - BankAccountModel: Dataclass representing a bank account.
+    - BankAccount: Class for interacting with bank accounts.
+
+Exceptions:
+    - NoDefaultBankAccountException: Exception for when no default bank account is found.
+
+Functions:
+    - (none)
+
+Usage:
+    >>> import superfaktura.bank_account
+    >>> # Create an instance of BankAccount
+    >>> bank = superfaktura.bank_account.BankAccount()
+    >>> # Retrieve a list of bank accounts
+    >>> accounts = bank.list()
+    >>> # Get the default bank account
+    >>> default_account = bank.default()
+    >>> # Create or update a bank account
+    >>> data = {"account": "1234567890", "bank_code": "1234567890", "default": True}
+    >>> bank.post(data)
+"""
+
 from dataclasses import dataclass, asdict
 from typing import Optional
 
@@ -5,11 +34,13 @@ from superfaktura.superfaktura_api import SuperFakturaAPI
 
 
 class NoDefaultBankAccountException(Exception):
-    pass
+    """Exception for when no default bank account is found."""
 
 
 @dataclass
 class BankAccountModel:
+    """Dataclass representing a bank account."""
+
     account: Optional[str]
     bank_code: Optional[str]
     bank_name: Optional[str]
@@ -20,6 +51,7 @@ class BankAccountModel:
     id: Optional[int]
 
     def as_dict(self) -> dict:
+        """Returns a dictionary representation of the BankAccountModel."""
         data = asdict(self)
         for key in list(data.keys()):
             if data[key] is None:
@@ -28,24 +60,42 @@ class BankAccountModel:
 
     @staticmethod
     def from_dict(data: dict) -> "BankAccountModel":
+        """Creates a BankAccountModel from a dictionary."""
         return BankAccountModel(
-            **{
+            **{k: v for k, v in data.items() if k in BankAccountModel.__annotations__}
-                k: v
-                for k, v in data.items()
-                if k in BankAccountModel.__dataclass_fields__
-            }
         )
 
 
 class BankAccount(SuperFakturaAPI):
+    """
+    Bank Account Class.
+
+    This class provides methods for interacting with bank accounts in the SuperFaktura API.
+    It allows for retrieving, creating, updating, and deleting bank accounts.
+
+    Methods:
+        - list: Retrieves a list of bank accounts.
+        - default: Retrieves the default bank account.
+        - post: Creates or updates a bank account.
+
+    Usage:
+        >>> bank = BankAccount()
+        >>> accounts = bank.list()
+        >>> default_account = bank.default()
+        >>> data = {"account": "1234567890", "bank_code": "1234567890", "default": True}
+        >>> bank.post(data)
+    """
+
     def __init__(self):
         super().__init__()
 
     def list(self) -> dict:
+        """Retrieves a list of bank accounts."""
         url = "bank_accounts/index"
         return self.get(url)
 
     def default(self) -> Optional[BankAccountModel]:
+        """Retrieves the default bank account."""
         accounts = self.list()["BankAccounts"]
         for account in accounts:
             if account["BankAccount"]["default"]:

superfaktura/client_contacts.py

@@ -1,3 +1,24 @@
+"""
+Module for interacting with client contacts in SuperFaktura.
+
+This module provides classes and functions for working with client contacts,
+including creating, reading, and updating contact information.
+
+Classes:
+    ClientException: Base class for client exceptions.
+    ClientContactModel: Dataclass representing a client contact.
+
+Functions:
+    (none)
+
+Variables:
+    (none)
+
+Notes:
+    This module uses the SuperFaktura API to interact with client contacts.
+    You must have a valid API key and credentials to use this module.
+"""
+
 import dataclasses
 import json
 from pprint import pprint
@@ -7,11 +28,13 @@ from superfaktura.superfaktura_api import SuperFakturaAPI
 
 
 class ClientException(Exception):
-    pass
+    """Base class for client exceptions."""
 
 
 @dataclasses.dataclass
 class ClientContactModel:
+    """Client contact model."""
+
     name: str
     address: Optional[str] = None
     bank_account: Optional[str] = None
@@ -48,6 +71,7 @@ class ClientContactModel:
     id: Optional[int] = None
 
     def as_dict(self) -> dict:
+        """Returns a dictionary representation of the ClientContactModel."""
         data = dataclasses.asdict(self)
         for key in list(data.keys()):
             if data[key] is None:
@@ -56,32 +80,34 @@ class ClientContactModel:
 
     @staticmethod
     def from_dict(data: dict) -> "ClientContactModel":
+        """Creates a ClientContactModel from a dictionary."""
         return ClientContactModel(
-            **{
+            **{k: v for k, v in data.items() if k in ClientContactModel.__annotations__}
-                k: v
-                for k, v in data.items()
-                if k in ClientContactModel.__dataclass_fields__
-            }
         )
 
 
 class ClientContact(SuperFakturaAPI):
+    """Client contact class."""
+
     def __init__(self):
         super().__init__()
 
     def add_contact(self, contact: ClientContactModel) -> bool:
+        """Adds a new client contact."""
         url = "clients/create"
         data = {"Client": contact.as_dict()}
-        resp = self.post(endpoint=url, data=json.dumps(data))
+        response = self.post(endpoint=url, data=json.dumps(data))
-        if resp["error_message"] == "Client created":
+        if response["error_message"] == "Client created":
             return True
         return False
 
     def list(self) -> dict:
+        """Lists all exists client contacts."""
         url = "clients/index.json"
         return self.get(endpoint=url)
 
     def get_client(self, client_id: int) -> ClientContactModel:
+        """Gets a client contact by ID."""
         url = f"clients/view/{client_id}"
         data = self.get(endpoint=url)
         if "Client" not in data:

superfaktura/enumerations/currency.py

@@ -1,3 +1,30 @@
+"""
+Currency Enumeration.
+
+This module provides an enumeration of currencies that can be used in the SuperFaktura API.
+
+Classes:
+    - Currencies: Enumeration of currencies.
+
+Usage:
+    from superfaktura.enumerations.currency import Currencies
+    currency = Currencies.CZK
+"""
+
+
 class Currencies:
+    """
+    Currency Enumeration.
+
+    This enumeration represents the different currencies that can be used in the SuperFaktura API.
+
+    Values:
+        - CZK: Czech Koruna
+        - EUR: Euro
+
+    Usage:
+        currency = Currencies.CZK
+    """
+
     CZK = "CZK"
     EUR = "EUR"

superfaktura/enumerations/language.py

@@ -0,0 +1,54 @@
+"""
+Language Enumeration.
+
+This module provides an enumeration of languages that can be used in the SuperFaktura API.
+
+Classes:
+    - Language: Enumeration of languages.
+
+Usage:
+    from superfaktura.enumerations.language import Language
+    language = Language.Czech
+"""
+
+
+class Language:
+    """
+    Language Enumeration.
+
+    This enumeration represents the different languages that can be used in the SuperFaktura API.
+
+    Values:
+        - Czech: Czech
+        - German: German
+        - English: English
+        - Croatian: Croatian
+        - Hungarian: Hungarian
+        - Italian: Italian
+        - Dutch: Dutch
+        - Polish: Polish
+        - Romanian: Romanian
+        - Russian: Russian
+        - Slovak: Slovak
+        - Slovene: Slovene
+        - Spanish: Spanish
+        - Ukrainian: Ukrainian
+
+    Usage:
+        language = Language.Czech
+    """
+
+    Czech = "cze"
+    German = "deu"
+    English = "eng"
+    Croatian = "hrv"
+    Hungarian = "hun"
+    Italian = "ita"
+    Dutch = "nld"
+    Polish = "pol"
+    Romanian = "rom"
+    Russian = "rus"
+    Slovak = "slo"
+    Slovene = "slv"
+    Spanish = "spa"
+    Ukrainian = "ukr"

superfaktura/invoice.py

@@ -1,16 +1,68 @@
+"""
+Invoice Module.
+
+This module provides classes and functions for working with invoices in the SuperFaktura API.
+It allows for retrieving, creating, updating, and deleting invoices.
+
+Classes:
+    - InvoiceModel: Dataclass representing an invoice.
+    - InvoiceItem: Dataclass representing an invoice item.
+    - Invoice: Class for interacting with invoices.
+
+Exceptions:
+    - NoDefaultBankAccountException: Exception for when no default bank account is found.
+
+Functions:
+    - (none)
+
+Usage:
+    >>> import superfaktura.invoice
+    >>> # Create an instance of Invoice
+    >>> invoice = superfaktura.invoice.Invoice()
+    >>> # Create an invoice
+    >>> invoice.add(
+        invoice_model=InvoiceModel(
+            type=InvoiceType.INVOICE,
+            name="My First Invoice",
+            due=Date("2025-04-01"),
+            invoice_currency=Currencies.EUR,
+            header_comment="We invoice you for services",
+            bank_accounts=[bank.default().as_dict()],
+        ),
+        items=[
+            InvoiceItem(
+                name="Website Development", unit_price=1000.0, quantity=1, tax=20
+            ),
+            InvoiceItem(
+                name="Hosting Service (1 year)", unit_price=500.0, quantity=1, tax=20
+            ),
+        ],
+        contact=ClientContactModel(
+            name="John Doe",
+            email="john.doe@examle.com",
+            phone="+1 555-1234",
+            address="123 Main Street, New York",
+            ico="987654321",
+            update=True,
+            country_id=225,
+        ),
+    )
+"""
+
 from dataclasses import dataclass, asdict
-from typing import Optional, List
+from typing import Optional, List, IO
 import json
 
-from superfaktura.bank_account import BankAccount
 from superfaktura.client_contacts import ClientContactModel
-from superfaktura.enumerations.currency import Currencies
+from superfaktura.enumerations.language import Language
 from superfaktura.superfaktura_api import SuperFakturaAPI
 from superfaktura.utils.data_types import Date, DateEncoder
 
 
 @dataclass
 class InvoiceModel:
+    """This dataclass represents an invoice in the SuperFaktura API."""
+
     add_rounding_item: Optional[int] = 0
     already_paid: Optional[int] = None
     bank_accounts: Optional[List[dict]] = None
@@ -51,6 +103,7 @@ class InvoiceModel:
     vat_transfer: Optional[int] = None
 
     def as_dict(self) -> dict:
+        """Returns a dictionary representation of the InvoiceModel."""
         data = asdict(self)
         for key in list(data.keys()):
             if data[key] is None:
@@ -66,6 +119,8 @@ class InvoiceModel:
 
 @dataclass
 class InvoiceItem:
+    """This dataclass represents an invoice item in the SuperFaktura API."""
+
     name: str
     unit_price: float
     description: Optional[str] = None
@@ -80,6 +135,50 @@ class InvoiceItem:
     use_document_currency: Optional[int] = 0
 
     def as_dict(self) -> dict:
+        """Returns a dictionary representation of the InvoiceItem."""
+        data = asdict(self)
+        for key in list(data.keys()):
+            if data[key] is None:
+                del data[key]
+        return data
+
+
+@dataclass
+class InvoiceRespModel:
+    """
+    This dataclass represents the response model for an invoice in the SuperFaktura API.
+
+    Attributes:
+        - error (int): The error code.
+        - error_message (str): The error message.
+        - invoice_id (Optional[int]): The ID of the invoice.
+        - invoice_token (Optional[str]): The token of the invoice.
+    """
+
+    error: int
+    error_message: str
+    invoice_id: Optional[int] = None
+    invoice_token: Optional[str] = None
+
+
+@dataclass
+class InvoiceSettings:
+    """
+    This dataclass represents the settings for an invoice in the SuperFaktura API.
+    """
+
+    language: Optional[str] = None
+    bysquare: Optional[bool] = None
+    callback_payment: Optional[str] = None
+    online_payment: Optional[bool] = None
+    payment_info: Optional[bool] = None
+    paypal: Optional[bool] = None
+    show_prices: Optional[bool] = None
+    signature: Optional[bool] = None
+    summary_bg_color: Optional[str] = None
+
+    def as_dict(self) -> dict:
+        """Returns a dictionary representation of the InvoiceSettings."""
         data = asdict(self)
         for key in list(data.keys()):
             if data[key] is None:
@@ -88,56 +187,118 @@ class InvoiceItem:
 
 
 class InvoiceType:
+    """
+    Invoice Type Enumeration.
+
+    This enumeration represents the different types of invoices that can be created.
+
+    Usage:
+        invoice_type = InvoiceType.PROFORMA
+    """
+
     PROFORMA = "proforma"
     INVOICE = "regular"
 
 
 class Invoice(SuperFakturaAPI):
+    """
+    Invoice Class.
+
+    This class provides methods for interacting with invoices in the SuperFaktura API.
+    It allows for retrieving, creating, updating, and deleting invoices.
+
+    Methods:
+        - add: Creates a new invoice.
+        - get: Retrieves an invoice by ID.
+        - list: Retrieves a list of invoices.
+        - update: Updates an existing invoice.
+
+    Usage:
+        >>> invoice = Invoice()
+        >>> invoice.add(
+            invoice_model=InvoiceModel(
+                type=InvoiceType.INVOICE,
+                name="My First Invoice",
+                due=Date("2025-04-01"),
+                invoice_currency=Currencies.EUR,
+                header_comment="We invoice you for services",
+                bank_accounts=[bank.default().as_dict()],
+            ),
+            items=[
+                InvoiceItem(
+                    name="Website Development", unit_price=1000.0, quantity=1, tax=20
+                ),
+                InvoiceItem(
+                    name="Hosting Service (1 year)", unit_price=500.0, quantity=1, tax=20
+                ),
+            ],
+            contact=ClientContactModel(
+                name="John Doe",
+                email="john.doe@example.com",
+                phone="+1 555-1234",
+                address="123 Main Street, New York",
+                ico="987654321",
+                update=True,
+                country_id=225,
+            ),
+        )
+    """
+
     def __init__(self):
         super().__init__()
 
     def add(
         self,
-        invoice: InvoiceModel,
+        invoice_model: InvoiceModel,
         items: List[InvoiceItem],
         contact: ClientContactModel,
-    ):
+        invoice_settings: Optional[InvoiceSettings] = None,
+    ) -> InvoiceRespModel:
+        """
+        Adds a new invoice.
+
+        Args:
+            invoice_model (InvoiceModel): The invoice model.
+            items (List[InvoiceItem]): List of invoice items.
+            contact (ClientContactModel): The client contact model.
+            invoice_settings (Optional[InvoiceSettings]): The invoice settings.
+
+        Returns:
+            InvoiceRespModel: The response model for the invoice.
+        """
         data = {
-            "Invoice": invoice.as_dict(),
+            "Invoice": invoice_model.as_dict(),
             "InvoiceItem": [item.as_dict() for item in items],
             "Client": contact.as_dict(),
+            "InvoiceSetting": invoice_settings.as_dict() if invoice_settings else {},
         }
         url = "invoices/create"
         resp = self.post(endpoint=url, data=json.dumps(data, cls=DateEncoder))
-        return resp
+        invoice_resp = InvoiceRespModel(
-
+            error=resp["error"], error_message=resp["error_message"]
-
-if __name__ == "__main__":
-    invoice = Invoice()
-    bank = BankAccount()
-    invoice.add(
-        invoice=InvoiceModel(
-            type=InvoiceType.PROFORMA,
-            name="Invoice 3",
-            due=Date("2025-02-01"),
-            invoice_currency=Currencies.CZK,
-            header_comment="We invoice you for services",
-            bank_accounts=[bank.default().as_dict()],
-        ),
-        items=[
-            InvoiceItem(name="Services", unit_price=100, quantity=1, unit="ks", tax=21),
-            InvoiceItem(name="SIM card", unit_price=50, quantity=1, tax=21, unit="ks"),
-            InvoiceItem(
-                name="SIM card 2", unit_price=75, quantity=1, tax=21, unit="ks"
-            ),
-        ],
-        contact=ClientContactModel(
-            name="Richard Kubíček",
-            email="kubicekr@eledio.com",
-            phone="+420 123 456 789",
-            address="Jaroslava Foglara 861/1",
-            ico="123",
-            update=True,
-            country_id=57,
-        ),
         )
+        if "data" in resp:
+            if "Invoice" in resp["data"]:
+                invoice_resp.invoice_id = int(resp["data"]["Invoice"]["id"])
+                invoice_resp.invoice_token = resp["data"]["Invoice"]["token"]
+        return invoice_resp
+
+    def get_pdf(
+        self,
+        invoice: InvoiceRespModel,
+        descriptor: IO[bytes],
+        language: str = Language.Czech,
+    ) -> None:
+        """
+        Retrieves the PDF of the invoice.
+
+        Args:
+            invoice (InvoiceRespModel): The response model for the invoice.
+            descriptor (IO[bytes]): The descriptor to write the PDF data to.
+            language (str): The language for the PDF.
+
+        Returns:
+            None
+        """
+        url = f"{language}/invoices/pdf/{invoice.invoice_id}/token:{invoice.invoice_token}"
+        self.download(url, descriptor)

superfaktura/superfaktura_api.py

@@ -1,18 +1,46 @@
-from typing import Dict
+"""
+SuperFaktura API Client.
+
+This module provides classes and functions for working with the SuperFaktura API.
+It allows for reading, creating, updating, and deleting data in SuperFaktura.
+
+Classes:
+    - SuperFakturaAPI: The base class for working with the SuperFaktura API.
+    - SuperFakturaAPIException: An exception for errors when working with the SuperFaktura API.
+    - SuperFakturaAPIMissingCredentialsException: An exception for missing login credentials.
+
+Functions:
+    - get: Retrieves data from the SuperFaktura API.
+    - post: Creates or updates data in the SuperFaktura API.
+
+Usage:
+    >>> import superfaktura.superfaktura_api
+    >>> # Create an instance of SuperFakturaAPI
+    >>> api = superfaktura.superfaktura_api.SuperFakturaAPI()
+    >>> # Retrieve data from the SuperFaktura API
+    >>> incoming_data = api.get('endpoint')
+    >>> # Create or update data in the SuperFaktura API
+    >>> api.post('endpoint', outgoing_data)
+"""
+
+import os
+from typing import Dict, IO
 
 import requests
-import os
 from dotenv import load_dotenv  # type: ignore
 
 
 class SuperFakturaAPIException(Exception):
-    pass
+    """Exception for errors when working with the SuperFaktura API."""
+
 
 class SuperFakturaAPIMissingCredentialsException(Exception):
-    pass
+    """Exception for missing login credentials."""
 
 
 class SuperFakturaAPI:
+    """Base class for working with the SuperFaktura API."""
+
     def __init__(self) -> None:
         load_dotenv()
         _api_key = os.getenv("SUPERFAKTURA_API_KEY")
@@ -20,28 +48,130 @@ class SuperFakturaAPI:
         _api_mail = os.getenv("SUPERFAKTURA_API_EMAIL")
         _api_company_id = os.getenv("SUPERFAKTURA_API_COMPANY_ID")
         if not _api_key or not self._api_url or not _api_mail or not _api_company_id:
-            raise SuperFakturaAPIMissingCredentialsException('Please ensure, that necessary credentials are set. Please see README.md')
+            raise SuperFakturaAPIMissingCredentialsException(
-
+                "Please ensure, that necessary "
-        self._auth_header = {
+                "credentials are set. Please see"
-            "Authorization": f"SFAPI email={_api_mail}&apikey={_api_key}&company_id={_api_company_id}"
+                " README.md"
-        }
-
-    def get(self, endpoint: str) -> Dict:
-        url = f"{self._api_url}/{endpoint}"
-        req = requests.get(url=url, headers=self._auth_header)
-        if req.status_code == 200:
-            return req.json()
-        else:
-            raise SuperFakturaAPIException(
-                f"Get status code: {req.status_code}; {req.json()}"
             )
 
-    def post(self, endpoint: str, data: str) -> Dict:
+        self._auth_header = {
+            "Authorization": f"SFAPI email={_api_mail}&apikey={_api_key}&company_id="
+            f"{_api_company_id}"
+        }
+
+    def get(self, endpoint: str, timeout: int = 5) -> Dict:
+        """
+        Retrieves data from the SuperFaktura API.
+
+        Retrieves data from the specified endpoint in the SuperFaktura API.
+
+        Args:
+            endpoint (str): The API endpoint to retrieve data from (e.g. 'invoices', 'clients',
+                            etc.).
+            timeout (int, optional): The timeout for the API request in seconds. Defaults to 5.
+
+        Returns:
+            Dict: The retrieved data in JSON format.
+
+        Raises:
+            SuperFakturaAPIException: If the API request fails or returns an error.
+
+        Examples:
+            >>> api = SuperFakturaAPI()
+            >>> data = api.get('invoices')
+            >>> print(data)
+
+        Notes:
+            The available endpoints can be found in the SuperFaktura API documentation.
+        """
         url = f"{self._api_url}/{endpoint}"
-        req = requests.post(url=url, headers=self._auth_header, data={"data": data})
+        req = requests.get(url=url, headers=self._auth_header, timeout=timeout)
+        if req.status_code == 200:
+            try:
+                return req.json()
+            except requests.exceptions.JSONDecodeError as e:
+                raise SuperFakturaAPIException(
+                    f"Unable to decode response as JSON; {req.content!r}; {e}"
+                ) from e
+        raise SuperFakturaAPIException(
+            f"Get status code: {req.status_code}; {req.content!r}"
+        )
+
+    def download(self, endpoint: str, descriptor: IO[bytes], timeout: int = 5) -> None:
+        """
+        Download data stream from the SuperFaktura API.
+
+        Download data stream from the specified endpoint in the SuperFaktura API.
+
+        Args:
+            endpoint (str): The API endpoint to retrieve data from (e.g. 'invoices', 'clients',
+                            etc.).
+            descriptor (IO[bytes]): The descriptor to write the data stream to.
+            timeout (int, optional): The timeout for the API request in seconds. Defaults to 5.
+
+        Returns:
+            None
+
+        Raises:
+            SuperFakturaAPIException: If the API request fails or returns an error.
+
+        Examples:
+            >>> api = SuperFakturaAPI()
+            >>> with open("data.pdf", "wb") as f:
+            >>>     api.download("some/endpoint", descriptor=f)
+
+        Notes:
+            The available endpoints can be found in the SuperFaktura API documentation.
+        """
+        url = f"{self._api_url}/{endpoint}"
+        req = requests.get(url=url, headers=self._auth_header, timeout=timeout)
+        if req.status_code == 200:
+            if descriptor.writable():
+                descriptor.write(req.content)
+            else:
+                raise SuperFakturaAPIException(
+                    f"Descriptor {descriptor} is not writable"
+                )
+        else:
+            raise SuperFakturaAPIException(
+                f"Download status code: {req.status_code}; {req.content!r}"
+            )
+
+    def post(self, endpoint: str, data: str, timeout: int = 5) -> Dict:
+        """
+        Creates or updates data in the SuperFaktura API.
+
+        Creates or updates data in the specified endpoint in the SuperFaktura API.
+
+        Args:
+            endpoint (str): The API endpoint to create or update data in (e.g. 'invoices',
+                            'clients', etc.).
+            data (str): The data to be created or updated in JSON format.
+            timeout (int, optional): The timeout for the API request in seconds. Defaults
+                                    to 5.
+
+        Returns:
+            Dict: The created or updated data in JSON format.
+
+        Raises:
+            SuperFakturaAPIException: If the API request fails or returns an error.
+
+        Examples:
+            >>> api = SuperFakturaAPI()
+            >>> data = '{"name": "Example Invoice", "amount": 100.0}'
+            >>> response = api.post('invoices', data)
+            >>> print(response)
+
+        Notes:
+            The available endpoints can be found in the SuperFaktura API documentation.
+            The data should be a valid JSON string.
+        """
+        url = f"{self._api_url}/{endpoint}"
+        req = requests.post(
+            url=url, headers=self._auth_header, data={"data": data}, timeout=timeout
+        )
         if req.status_code == 200:
             return req.json()
-        else:
         raise SuperFakturaAPIException(
             f"Post status code: {req.status_code}; {req.json()}"
         )

superfaktura/utils/country.py

@@ -1,12 +1,33 @@
-from pprint import pprint
+"""
+Country Module.
+
+This module provides utilities for working with countries in the SuperFaktura API.
+
+Functions:
+    - country_list: Retrieves a list of countries.
+
+Usage:
+    from superfaktura.utils.country import country_list
+    countries = country_list()
+    print(countries)
+"""
 
 from superfaktura.superfaktura_api import SuperFakturaAPI
 
 
 def country_list():
+    """
+    Retrieves a list of countries.
+
+    This function returns a list of countries that can be used in the SuperFaktura API.
+
+    Returns:
+        - list: A list of countries.
+
+    Usage:
+        countries = country_list()
+        print(countries)
+    """
     api = SuperFakturaAPI()
     url = "countries"
     return api.get(url)
-
-
-pprint(country_list())

superfaktura/utils/data_types.py

@@ -1,3 +1,22 @@
+"""
+Data Types Module.
+
+This module provides data types and utilities for working with dates and other data types
+in the SuperFaktura API.
+
+Classes:
+    - Date: Represents a date in the format YYYY-MM-DD.
+    - DateTime: Represents a date and time in the format YYYY-MM-DD HH:MM:SS.
+
+Functions:
+    - (none)
+
+Usage:
+    from superfaktura.utils.data_types import Date, DateTime
+    date = Date("2022-01-01")
+    datetime = DateTime("2022-01-01 12:00:00")
+"""
+
 from datetime import datetime
 from typing import Optional
 
@@ -5,6 +24,22 @@ import json
 
 
 class Date:
+    """
+    Date Class.
+
+    This class represents a date in the format YYYY-MM-DD.
+
+    Attributes:
+        - date (str): The date in the format YYYY-MM-DD.
+
+    Methods:
+        - __str__: Returns the date as a string.
+
+    Usage:
+        date = Date("2022-01-01")
+        print(date)  # Output: 2022-01-01
+    """
+
     def __init__(self, date_str: Optional[str] = None):
         """
         Creates a Date instance that supports typing and validation for the format YYYY-MM-DD.
@@ -25,8 +60,10 @@ class Date:
         """
         try:
             return datetime.strptime(date_str, "%Y-%m-%d")
-        except ValueError:
+        except ValueError as exc:
-            raise ValueError(f"Date must be in format YYYY-MM-DD, got: {date_str}")
+            raise ValueError(
+                f"Date must be in format YYYY-MM-DD, got: {date_str}"
+            ) from exc
 
     def __str__(self) -> str:
         """
@@ -56,6 +93,20 @@ class Date:
 
 
 class DateEncoder(json.JSONEncoder):
+    """
+    Date Encoder Class.
+
+    This class is a custom JSON encoder that converts Date objects to strings.
+
+    Methods:
+        - default: Encodes a Date object as a string.
+
+    Usage:
+        encoder = DateEncoder()
+        date = Date("2022-01-01")
+        json_string = json.dumps(date, cls=encoder)
+    """
+
     def default(self, o):
         if isinstance(o, Date):
             return o.to_json()

test/test_superfaktura_api.py

@@ -0,0 +1,88 @@
+import os
+import pytest
+from unittest.mock import patch, mock_open, MagicMock
+
+import requests
+
+from superfaktura.superfaktura_api import (
+    SuperFakturaAPI,
+    SuperFakturaAPIException,
+    SuperFakturaAPIMissingCredentialsException,
+)
+
+@pytest.fixture
+def api():
+    with patch.dict(os.environ, {
+        "SUPERFAKTURA_API_KEY": "test_key",
+        "SUPERFAKTURA_API_URL": "https://api.superfaktura.cz",
+        "SUPERFAKTURA_API_EMAIL": "test_email",
+        "SUPERFAKTURA_API_COMPANY_ID": "test_company_id"
+    }):
+        return SuperFakturaAPI()
+
+def test_missing_credentials():
+    with patch.dict(os.environ, {}, clear=True):
+        with pytest.raises(SuperFakturaAPIMissingCredentialsException):
+            SuperFakturaAPI()
+
+def test_get(api):
+    with patch("requests.get") as mock_get:
+        mock_get.return_value.status_code = 200
+        mock_get.return_value.json.return_value = {"data": "test"}
+        response = api.get("test_endpoint")
+        assert response == {"data": "test"}
+
+def test_get_failure(api):
+    with patch("requests.get") as mock_get:
+        mock_get.return_value.status_code = 404
+        with pytest.raises(SuperFakturaAPIException):
+            api.get("test_endpoint")
+
+def test_download(api):
+    with patch("requests.get") as mock_get:
+        mock_get.return_value.status_code = 200
+        mock_get.return_value.content = b"test_content"
+        with patch("builtins.open", mock_open()) as mock_file:
+            with open("test_file", "wb") as f:
+                api.download("test_endpoint", f)
+            mock_file().write.assert_called_once_with(b"test_content")
+
+def test_download_failure(api):
+    with patch("requests.get") as mock_get:
+        mock_get.return_value.status_code = 404
+        with patch("builtins.open", mock_open()):
+            with open("test_file", "wb") as f:
+                with pytest.raises(SuperFakturaAPIException):
+                    api.download("test_endpoint", f)
+
+def test_post(api):
+    with patch("requests.post") as mock_post:
+        mock_post.return_value.status_code = 200
+        mock_post.return_value.json.return_value = {"data": "test"}
+        response = api.post("test_endpoint", '{"name": "Example"}')
+        assert response == {"data": "test"}
+
+def test_post_failure(api):
+    with patch("requests.post") as mock_post:
+        mock_post.return_value.status_code = 404
+        mock_post.return_value.json.return_value = {"error": "not found"}
+        with pytest.raises(SuperFakturaAPIException):
+            api.post("test_endpoint", '{"name": "Example"}')
+
+def test_get_invalid_json(api):
+    with patch("requests.get") as mock_get:
+        mock_response = MagicMock()
+        mock_response.status_code = 200
+        mock_response.json.side_effect = requests.exceptions.JSONDecodeError("msg", "doc", 0)
+        mock_get.return_value = mock_response
+        with pytest.raises(SuperFakturaAPIException, match="Unable to decode response as JSON"):
+            api.get("test_endpoint")
+
+def test_download_not_writable_descriptor(api):
+    with patch("requests.get") as mock_get:
+        mock_get.return_value.status_code = 200
+        mock_get.return_value.content = b"test_content"
+        mock_descriptor = MagicMock()
+        mock_descriptor.writable.return_value = False
+        with pytest.raises(SuperFakturaAPIException, match=" is not writable"):
+            api.download("test_endpoint", mock_descriptor)