diff --git a/.editorconfig b/.editorconfig
index eafade25..111e989c 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -11,6 +11,6 @@ trim_trailing_whitespace = true
 indent_style = tab
 indent_size = 4
 
-[*.yml,*.yaml]
+[*.{yml,yaml}]
 indent_style = space
 indent_size = 2
diff --git a/.flake8 b/.flake8
new file mode 100644
index 00000000..accc53c1
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,9 @@
+[flake8]
+doctests = True
+ignore =
+    # W503 and W504 are mutually exclusive, so one or the other must be ignored.
+    # PEP 8 recommends line break before, so we keep W504.
+    W503
+max-complexity = 10
+max-line-length = 120
+select = E,W,F,C,N
diff --git a/.github/workflows/lint-python.yml b/.github/workflows/lint-python.yml
new file mode 100644
index 00000000..2310d07a
--- /dev/null
+++ b/.github/workflows/lint-python.yml
@@ -0,0 +1,40 @@
+name: Lint Python code
+
+on:
+  push:
+    paths:
+      - "**.py"
+      - ".flake8"
+      - "pyproject.toml"
+      - "Taskfile.yml"
+  pull_request:
+    paths:
+      - "**.py"
+      - ".flake8"
+      - "pyproject.toml"
+      - "Taskfile.yml"
+
+jobs:
+  lint-python:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install Taskfile
+        uses: arduino/actions/setup-taskfile@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Install Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.8"
+
+      - name: Install Poetry
+        run: pip install poetry
+
+      - name: Lint Python files
+        run: task python:check
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a447ef77..4344a9ff 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,6 +10,9 @@ on:
       - "**/*.go"
       - "**/testdata/**"
       - "etc/schemas/**/*.json"
+      - "pyproject.toml"
+      - "test/**"
+      - "Taskfile.yml"
   pull_request:
     paths:
       - ".github/workflows/test.yml"
@@ -19,6 +22,9 @@ on:
       - "**/*.go"
       - "**/testdata/**"
       - "etc/schemas/**/*.json"
+      - "pyproject.toml"
+      - "test/**"
+      - "Taskfile.yml"
 
 jobs:
   test-go:
@@ -57,3 +63,14 @@ jobs:
 
       - name: Run unit tests
         run: task go:test-unit
+
+      - name: Install Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.8"
+
+      - name: Install Poetry
+        run: pip install poetry
+
+      - name: Run integration tests
+        run: task test-integration
diff --git a/.gitignore b/.gitignore
index b492b071..5e90cb94 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 # Build artifacts
 arduino-lint
 arduino-lint.exe
+__pycache__/
 
 # Test artifacts
 coverage_unit.txt
diff --git a/Taskfile.yml b/Taskfile.yml
index 90415e6f..c57bf9be 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -10,6 +10,7 @@ tasks:
     desc: Run tests
     cmds:
       - task: go:test-unit
+      - task: test-integration
       - task: schema:compile
 
   go:generate:
@@ -27,6 +28,12 @@ tasks:
     cmds:
       - go test -short -run '{{ default ".*" .TEST_REGEX }}' {{ default "-v" .GOFLAGS }} -coverprofile=coverage_unit.txt {{ default .DEFAULT_PACKAGES .PACKAGES }}
 
+  test-integration:
+    desc: Run integration tests
+    cmds:
+      - poetry install --no-root
+      - poetry run pytest test
+
   schema:compile:
     desc: Compile JSON schema
     cmds:
@@ -36,6 +43,7 @@ tasks:
     desc: Lint and check formatting of all files
     cmds:
       - task: go:check
+      - task: python:check
       - task: docs:check
       - task: config:check
       - task: check-spelling
@@ -44,6 +52,7 @@ tasks:
     desc: Lint all files
     cmds:
       - task: go:lint
+      - task: python:lint
       - task: docs:lint
       - task: config:lint
 
@@ -58,6 +67,7 @@ tasks:
     desc: Format all files
     cmds:
       - task: go:format
+      - task: python:format
       - task: docs:format
       - task: config:format
 
@@ -88,6 +98,22 @@ tasks:
     cmds:
       - gofmt -l -w {{ default .DEFAULT_PATHS .PATHS }}
 
+  python:check:
+    cmds:
+      - task: python:lint
+
+  python:lint:
+    desc: Lint Python code
+    cmds:
+      - poetry install --no-root
+      - poetry run flake8
+
+  python:format:
+    desc: Automatically formats Python files
+    cmds:
+      - poetry install --no-root
+      - poetry run black .
+
   docs:check:
     desc: Lint and check formatting of documentation files
     cmds:
diff --git a/poetry.lock b/poetry.lock
index 77ec89e4..49137bbe 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,18 +1,482 @@
+[[package]]
+category = "dev"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+name = "appdirs"
+optional = false
+python-versions = "*"
+version = "1.4.4"
+
+[[package]]
+category = "main"
+description = "Atomic file writes."
+marker = "sys_platform == \"win32\""
+name = "atomicwrites"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.4.0"
+
+[[package]]
+category = "main"
+description = "Classes Without Boilerplate"
+name = "attrs"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "20.3.0"
+
+[package.extras]
+dev = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+docs = ["furo", "sphinx", "zope.interface"]
+tests = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+tests_no_zope = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
+
+[[package]]
+category = "dev"
+description = "The uncompromising code formatter."
+name = "black"
+optional = false
+python-versions = ">=3.6"
+version = "20.8b1"
+
+[package.dependencies]
+appdirs = "*"
+click = ">=7.1.2"
+mypy-extensions = ">=0.4.3"
+pathspec = ">=0.6,<1"
+regex = ">=2020.1.8"
+toml = ">=0.10.1"
+typed-ast = ">=1.4.0"
+typing-extensions = ">=3.7.4"
+
+[package.extras]
+colorama = ["colorama (>=0.4.3)"]
+d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+
+[[package]]
+category = "dev"
+description = "Composable command line interface toolkit"
+name = "click"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "7.1.2"
+
 [[package]]
 category = "dev"
 description = "Codespell"
 name = "codespell"
 optional = false
+python-versions = ">=3.5"
+version = "2.0.0"
+
+[package.extras]
+dev = ["check-manifest", "flake8", "pytest", "pytest-cov", "pytest-dependency"]
+hard-encoding-detection = ["chardet"]
+
+[[package]]
+category = "main"
+description = "Cross-platform colored terminal text."
+marker = "sys_platform == \"win32\""
+name = "colorama"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.4.4"
+
+[[package]]
+category = "dev"
+description = "the modular source code checker: pep8 pyflakes and co"
+name = "flake8"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+version = "3.8.4"
+
+[package.dependencies]
+mccabe = ">=0.6.0,<0.7.0"
+pycodestyle = ">=2.6.0a1,<2.7.0"
+pyflakes = ">=2.2.0,<2.3.0"
+
+[[package]]
+category = "dev"
+description = "Polyfill package for Flake8 plugins"
+name = "flake8-polyfill"
+optional = false
+python-versions = "*"
+version = "1.0.2"
+
+[package.dependencies]
+flake8 = "*"
+
+[[package]]
+category = "main"
+description = "iniconfig: brain-dead simple config-ini parsing"
+name = "iniconfig"
+optional = false
+python-versions = "*"
+version = "1.1.1"
+
+[[package]]
+category = "main"
+description = "Pythonic task execution"
+name = "invoke"
+optional = false
 python-versions = "*"
-version = "1.17.1"
+version = "1.4.1"
+
+[[package]]
+category = "dev"
+description = "McCabe checker, plugin for flake8"
+name = "mccabe"
+optional = false
+python-versions = "*"
+version = "0.6.1"
+
+[[package]]
+category = "dev"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
+name = "mypy-extensions"
+optional = false
+python-versions = "*"
+version = "0.4.3"
+
+[[package]]
+category = "main"
+description = "Core utilities for Python packages"
+name = "packaging"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "20.7"
+
+[package.dependencies]
+pyparsing = ">=2.0.2"
+
+[[package]]
+category = "dev"
+description = "Utility library for gitignore style pattern matching of file paths."
+name = "pathspec"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.8.1"
+
+[[package]]
+category = "dev"
+description = "Check PEP-8 naming conventions, plugin for flake8"
+name = "pep8-naming"
+optional = false
+python-versions = "*"
+version = "0.11.1"
+
+[package.dependencies]
+flake8-polyfill = ">=1.0.2,<2"
+
+[[package]]
+category = "main"
+description = "plugin and hook calling mechanisms for python"
+name = "pluggy"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "0.13.1"
+
+[package.extras]
+dev = ["pre-commit", "tox"]
+
+[[package]]
+category = "main"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+name = "py"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.9.0"
+
+[[package]]
+category = "dev"
+description = "Python style guide checker"
+name = "pycodestyle"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.6.0"
+
+[[package]]
+category = "dev"
+description = "passive checker of Python programs"
+name = "pyflakes"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.2.0"
+
+[[package]]
+category = "main"
+description = "Python parsing module"
+name = "pyparsing"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "2.4.7"
+
+[[package]]
+category = "main"
+description = "pytest: simple powerful testing with Python"
+name = "pytest"
+optional = false
+python-versions = ">=3.5"
+version = "6.1.2"
+
+[package.dependencies]
+atomicwrites = ">=1.0"
+attrs = ">=17.4.0"
+colorama = "*"
+iniconfig = "*"
+packaging = "*"
+pluggy = ">=0.12,<1.0"
+py = ">=1.8.2"
+toml = "*"
+
+[package.extras]
+checkqa_mypy = ["mypy (0.780)"]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
+
+[[package]]
+category = "main"
+description = "Extensions to the standard Python datetime module"
+name = "python-dateutil"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
+version = "2.8.1"
+
+[package.dependencies]
+six = ">=1.5"
+
+[[package]]
+category = "dev"
+description = "Alternative regular expression module, to replace re."
+name = "regex"
+optional = false
+python-versions = "*"
+version = "2020.11.13"
+
+[[package]]
+category = "main"
+description = "Python helper for Semantic Versioning (http://semver.org/)"
+name = "semver"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.13.0"
+
+[[package]]
+category = "main"
+description = "Python 2 and 3 compatibility utilities"
+name = "six"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "1.15.0"
+
+[[package]]
+category = "main"
+description = "Python Library for Tom's Obvious, Minimal Language"
+name = "toml"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "0.10.2"
+
+[[package]]
+category = "dev"
+description = "a fork of Python 2 and 3 ast modules with type comment support"
+name = "typed-ast"
+optional = false
+python-versions = "*"
+version = "1.4.1"
+
+[[package]]
+category = "dev"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+name = "typing-extensions"
+optional = false
+python-versions = "*"
+version = "3.7.4.3"
 
 [metadata]
-content-hash = "0de193fa2f0268b58dac39b8ef306448c38f414041d05c8b81f3bb7d6fcf7738"
+content-hash = "a780e54598223d8e692fd0c0349f945d5a84852d4cccba583bc3cd18b9723cfe"
 lock-version = "1.0"
 python-versions = "^3.8"
 
 [metadata.files]
+appdirs = [
+    {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
+    {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
+]
+atomicwrites = [
+    {file = "atomicwrites-1.4.0-py2.py3-none-any.whl", hash = "sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197"},
+    {file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
+]
+attrs = [
+    {file = "attrs-20.3.0-py2.py3-none-any.whl", hash = "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6"},
+    {file = "attrs-20.3.0.tar.gz", hash = "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"},
+]
+black = [
+    {file = "black-20.8b1.tar.gz", hash = "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea"},
+]
+click = [
+    {file = "click-7.1.2-py2.py3-none-any.whl", hash = "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"},
+    {file = "click-7.1.2.tar.gz", hash = "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a"},
+]
 codespell = [
-    {file = "codespell-1.17.1-py3-none-any.whl", hash = "sha256:0ba864d8b25c4dc1b2a3fb067377ec11edb84c1a967a33d9e9cac73f386f3a0a"},
-    {file = "codespell-1.17.1.tar.gz", hash = "sha256:25a2ecd86b9cdc111dc40a30d0ed28c578e13a0ce158d1c383f9d47811bfcd23"},
+    {file = "codespell-2.0.0-py3-none-any.whl", hash = "sha256:a10b8bbb9f678e4edff7877af1f654fdc9e27c205f952c3ddee2981ad02ec5f2"},
+    {file = "codespell-2.0.0.tar.gz", hash = "sha256:dd9983e096b9f7ba89dd2d2466d1fc37231d060f19066331b9571341363c77b8"},
+]
+colorama = [
+    {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
+    {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
+]
+flake8 = [
+    {file = "flake8-3.8.4-py2.py3-none-any.whl", hash = "sha256:749dbbd6bfd0cf1318af27bf97a14e28e5ff548ef8e5b1566ccfb25a11e7c839"},
+    {file = "flake8-3.8.4.tar.gz", hash = "sha256:aadae8761ec651813c24be05c6f7b4680857ef6afaae4651a4eccaef97ce6c3b"},
+]
+flake8-polyfill = [
+    {file = "flake8-polyfill-1.0.2.tar.gz", hash = "sha256:e44b087597f6da52ec6393a709e7108b2905317d0c0b744cdca6208e670d8eda"},
+    {file = "flake8_polyfill-1.0.2-py2.py3-none-any.whl", hash = "sha256:12be6a34ee3ab795b19ca73505e7b55826d5f6ad7230d31b18e106400169b9e9"},
+]
+iniconfig = [
+    {file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
+    {file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
+]
+invoke = [
+    {file = "invoke-1.4.1-py2-none-any.whl", hash = "sha256:93e12876d88130c8e0d7fd6618dd5387d6b36da55ad541481dfa5e001656f134"},
+    {file = "invoke-1.4.1-py3-none-any.whl", hash = "sha256:87b3ef9d72a1667e104f89b159eaf8a514dbf2f3576885b2bbdefe74c3fb2132"},
+    {file = "invoke-1.4.1.tar.gz", hash = "sha256:de3f23bfe669e3db1085789fd859eb8ca8e0c5d9c20811e2407fa042e8a5e15d"},
+]
+mccabe = [
+    {file = "mccabe-0.6.1-py2.py3-none-any.whl", hash = "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42"},
+    {file = "mccabe-0.6.1.tar.gz", hash = "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"},
+]
+mypy-extensions = [
+    {file = "mypy_extensions-0.4.3-py2.py3-none-any.whl", hash = "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d"},
+    {file = "mypy_extensions-0.4.3.tar.gz", hash = "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"},
+]
+packaging = [
+    {file = "packaging-20.7-py2.py3-none-any.whl", hash = "sha256:eb41423378682dadb7166144a4926e443093863024de508ca5c9737d6bc08376"},
+    {file = "packaging-20.7.tar.gz", hash = "sha256:05af3bb85d320377db281cf254ab050e1a7ebcbf5410685a9a407e18a1f81236"},
+]
+pathspec = [
+    {file = "pathspec-0.8.1-py2.py3-none-any.whl", hash = "sha256:aa0cb481c4041bf52ffa7b0d8fa6cd3e88a2ca4879c533c9153882ee2556790d"},
+    {file = "pathspec-0.8.1.tar.gz", hash = "sha256:86379d6b86d75816baba717e64b1a3a3469deb93bb76d613c9ce79edc5cb68fd"},
+]
+pep8-naming = [
+    {file = "pep8-naming-0.11.1.tar.gz", hash = "sha256:a1dd47dd243adfe8a83616e27cf03164960b507530f155db94e10b36a6cd6724"},
+    {file = "pep8_naming-0.11.1-py2.py3-none-any.whl", hash = "sha256:f43bfe3eea7e0d73e8b5d07d6407ab47f2476ccaeff6937c84275cd30b016738"},
+]
+pluggy = [
+    {file = "pluggy-0.13.1-py2.py3-none-any.whl", hash = "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"},
+    {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
+]
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diff --git a/pyproject.toml b/pyproject.toml
index 3c389ea7..678914de 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,6 +6,17 @@ authors = ["Arduino <info@arduino.cc>"]
 
 [tool.poetry.dependencies]
 python = "^3.8"
+invoke = "1.4.1"
+pytest = "6.1.2"
+python-dateutil = "^2.8.1"
+semver = "^2.13.0"
 
 [tool.poetry.dev-dependencies]
+black = { version = "^20.8b1", allow-prereleases = true }
 codespell = ">=1.17.1"
+flake8 = "^3.8.4"
+pep8-naming = "^0.11.1"
+
+[tool.black]
+line-length = 120
+target-version = ["py38"]
diff --git a/test/__init__.py b/test/__init__.py
new file mode 100644
index 00000000..716032ff
--- /dev/null
+++ b/test/__init__.py
@@ -0,0 +1,14 @@
+# This file is part of arduino-lint.
+#
+# Copyright 2020 ARDUINO SA(http: // www.arduino.cc/)
+#
+# This software is released under the GNU General Public License version 3,
+# which covers the main part of arduino-lint.
+# The terms of this license can be found at:
+# https: // www.gnu.org/licenses/gpl-3.0.en.html
+#
+# You can be released from the requirements of the above licenses by purchasing
+# a commercial license. Buying such a license is mandatory if you want to
+# modify or otherwise use the software for commercial activities involving the
+# Arduino software without disclosing the source code of your own applications.
+# To purchase a commercial license, send an email to license@arduino.cc.
diff --git a/test/pytest.ini b/test/pytest.ini
new file mode 100644
index 00000000..d3f2009f
--- /dev/null
+++ b/test/pytest.ini
@@ -0,0 +1,9 @@
+[pytest]
+filterwarnings =
+    error
+    ignore::DeprecationWarning
+    ignore::ResourceWarning
+
+# --capture=no - disable per-test capture
+# --tb=long sets the length of the traceback in case of failures
+addopts = --capture=no --tb=long --verbose
diff --git a/test/test_all.py b/test/test_all.py
new file mode 100644
index 00000000..4a901104
--- /dev/null
+++ b/test/test_all.py
@@ -0,0 +1,227 @@
+# This file is part of arduino-lint.
+#
+# Copyright 2020 ARDUINO SA(http: // www.arduino.cc/)
+#
+# This software is released under the GNU General Public License version 3,
+# which covers the main part of arduino-lint.
+# The terms of this license can be found at:
+# https: // www.gnu.org/licenses/gpl-3.0.en.html
+#
+# You can be released from the requirements of the above licenses by purchasing
+# a commercial license. Buying such a license is mandatory if you want to
+# modify or otherwise use the software for commercial activities involving the
+# Arduino software without disclosing the source code of your own applications.
+# To purchase a commercial license, send an email to license@arduino.cc.
+import json
+import pathlib
+import platform
+import typing
+
+import dateutil.parser
+import invoke.context
+import pytest
+import semver
+
+test_data_path = pathlib.Path(__file__).resolve().parent.joinpath("testdata")
+
+
+def test_defaults(run_command):
+    result = run_command(cmd=[], custom_working_dir=test_data_path.joinpath("recursive"))
+    assert result.ok
+
+
+@pytest.mark.parametrize(
+    "project_folder, compliance_level",
+    [("Strict", "strict"), ("Specification", "specification"), ("Permissive", "permissive"), ("Invalid", None)],
+)
+def test_compliance(run_command, project_folder, compliance_level):
+    project_path = test_data_path.joinpath("compliance", project_folder)
+    expected_ok = False
+    for compliance_setting in ["strict", "specification", "permissive"]:
+        if compliance_setting == compliance_level:
+            expected_ok = True
+
+        result = run_command(cmd=["--compliance", compliance_setting, project_path])
+        assert result.ok == expected_ok
+
+
+def test_compliance_invalid(run_command):
+    result = run_command(cmd=["--compliance", "foo", test_data_path.joinpath("ValidSketch")])
+    assert not result.ok
+
+
+def test_format(run_command):
+    project_path = test_data_path.joinpath("ValidSketch")
+    result = run_command(cmd=["--format", "text", project_path])
+    assert result.ok
+    with pytest.raises(json.JSONDecodeError):
+        json.loads(result.stdout)
+
+    result = run_command(cmd=["--format", "json", project_path])
+    assert result.ok
+    json.loads(result.stdout)
+
+    result = run_command(cmd=["--format", "foo", project_path])
+    assert not result.ok
+
+
+def test_help(run_command):
+    result = run_command(cmd=["--help"])
+    assert result.ok
+    assert "Usage:" in result.stdout
+
+
+@pytest.mark.parametrize(
+    "project_folder, expected_exit_statuses",
+    [
+        ("Submit", {"submit": 0, "update": 1, "false": 0}),
+        ("Update", {"submit": 1, "update": 0, "false": 0}),
+        ("False", {"submit": 1, "update": 1, "false": 0}),
+        ("Invalid", {"submit": 1, "update": 1, "false": 1}),
+    ],
+)
+def test_library_manager(run_command, project_folder, expected_exit_statuses):
+    project_path = test_data_path.joinpath("library-manager", project_folder)
+    for library_manager_setting, expected_exit_status in expected_exit_statuses.items():
+        result = run_command(cmd=["--library-manager", library_manager_setting, project_path])
+        assert result.exited == expected_exit_status
+
+
+def test_library_manager_invalid(run_command):
+    result = run_command(cmd=["--library-manager", "foo", test_data_path.joinpath("ValidSketch")])
+    assert not result.ok
+
+
+@pytest.mark.parametrize(
+    "project_folder, expected_exit_statuses",
+    [
+        ("Sketch", {"sketch": 0, "library": 1, "platform": 1, "package-index": 1, "all": 0}),
+        ("Library", {"sketch": 1, "library": 0, "platform": 1, "package-index": 1, "all": 0}),
+        ("Platform", {"sketch": 1, "library": 1, "platform": 0, "package-index": 1, "all": 0}),
+        ("PackageIndex", {"sketch": 1, "library": 1, "platform": 1, "package-index": 0, "all": 0}),
+    ],
+)
+def test_project_type(run_command, project_folder, expected_exit_statuses):
+    project_path = test_data_path.joinpath("project-type", project_folder)
+    for project_type, expected_exit_status in expected_exit_statuses.items():
+        result = run_command(cmd=["--project-type", project_type, project_path])
+        assert result.exited == expected_exit_status
+
+
+def test_project_type_invalid(run_command):
+    result = run_command(cmd=["--project-type", "foo", test_data_path.joinpath("ValidSketch")])
+    assert not result.ok
+
+
+def test_recursive(run_command):
+    valid_projects_path = test_data_path.joinpath("recursive")
+    result = run_command(cmd=["--recursive", "true", valid_projects_path])
+    assert result.ok
+
+    result = run_command(cmd=["--recursive", "false", valid_projects_path])
+    assert not result.ok
+
+
+def test_recursive_invalid(run_command):
+    result = run_command(cmd=["--recursive", "foo", test_data_path.joinpath("ValidSketch")])
+    assert not result.ok
+
+
+def test_report_file(run_command, working_dir):
+    project_path = test_data_path.joinpath("ValidSketch")
+    report_file_name = "report.json"
+    result = run_command(cmd=["--report-file", report_file_name, project_path])
+    assert result.ok
+    with pathlib.Path(working_dir, report_file_name).open() as report_file:
+        report = json.load(report_file)
+
+    assert pathlib.PurePath(report["configuration"]["paths"][0]) == project_path
+    assert report["configuration"]["projectType"] == "all"
+    assert report["configuration"]["recursive"]
+    assert pathlib.PurePath(report["projects"][0]["path"]) == project_path
+    assert report["projects"][0]["projectType"] == "sketch"
+    assert report["projects"][0]["summary"]["pass"]
+    assert report["projects"][0]["summary"]["errorCount"] == 0
+    assert report["summary"]["pass"]
+    assert report["summary"]["errorCount"] == 0
+
+
+def test_verbose(run_command):
+    project_path = test_data_path.joinpath("verbose", "HasWarnings")
+    result = run_command(cmd=["--format", "text", project_path])
+    assert result.ok
+    assert "result: pass" not in result.stdout
+    assert "result: fail" in result.stdout
+
+    result = run_command(cmd=["--format", "text", "--verbose", project_path])
+    assert result.ok
+    assert "result: pass" in result.stdout
+
+    result = run_command(cmd=["--format", "json", project_path])
+    assert result.ok
+    report = json.loads(result.stdout)
+    assert True not in [check.get("result") == "pass" for check in report["projects"][0]["checks"]]
+    assert True in [check.get("result") == "fail" for check in report["projects"][0]["checks"]]
+
+    result = run_command(cmd=["--format", "json", "--verbose", project_path])
+    assert result.ok
+    report = json.loads(result.stdout)
+    assert True in [check.get("result") == "pass" for check in report["projects"][0]["checks"]]
+    assert True in [check.get("result") == "fail" for check in report["projects"][0]["checks"]]
+
+
+def test_version(run_command):
+    result = run_command(cmd=["--version"])
+    assert result.ok
+    output_list = result.stdout.strip().split(sep=" ")
+    assert semver.VersionInfo.isvalid(version=output_list[0])
+    dateutil.parser.isoparse(output_list[1])
+
+
+@pytest.fixture(scope="function")
+def run_command(pytestconfig, working_dir) -> typing.Callable[..., invoke.runners.Result]:
+    """Provide a wrapper around invoke's `run` API so that every test will work in the same temporary folder.
+
+    Useful reference:
+        http://docs.pyinvoke.org/en/1.4/api/runners.html#invoke.runners.Result
+    """
+
+    arduino_lint_path = pathlib.Path(pytestconfig.rootdir).parent / "arduino-lint"
+
+    def _run(
+        cmd: list,
+        custom_working_dir: typing.Optional[str] = None,
+        custom_env: typing.Optional[dict] = None
+    ) -> invoke.runners.Result:
+        if cmd is None:
+            cmd = []
+        if not custom_working_dir:
+            custom_working_dir = working_dir
+        quoted_cmd = []
+        for token in cmd:
+            quoted_cmd.append(f'"{token}"')
+        cli_full_line = '"{}" {}'.format(arduino_lint_path, " ".join(quoted_cmd))
+        run_context = invoke.context.Context()
+        # It might happen that we need to change directories between drives on Windows,
+        # in that case the "/d" flag must be used otherwise directory wouldn't change
+        cd_command = "cd"
+        if platform.system() == "Windows":
+            cd_command += " /d"
+        # Context.cd() is not used since it doesn't work correctly on Windows.
+        # It escapes spaces in the path using "\ " but it doesn't always work,
+        # wrapping the path in quotation marks is the safest approach
+        with run_context.prefix(f'{cd_command} "{custom_working_dir}"'):
+            return run_context.run(
+                command=cli_full_line, echo=False, hide=True, warn=True, env=custom_env, encoding="utf-8"
+            )
+
+    return _run
+
+
+@pytest.fixture(scope="function")
+def working_dir(tmpdir_factory) -> str:
+    """Create a temporary folder for the test to run in. It will be created before running each test and deleted at the
+    end. This way all the tests work in isolation.
+    """
+    work_dir = tmpdir_factory.mktemp(basename="ArduinoLintTestWork")
+    yield str(work_dir)
diff --git a/test/testdata/InvalidSketch/Invalid Sketch.ino b/test/testdata/InvalidSketch/Invalid Sketch.ino
new file mode 100644
index 00000000..e51f794f
--- /dev/null
+++ b/test/testdata/InvalidSketch/Invalid Sketch.ino	
@@ -0,0 +1,2 @@
+void setup() {]
+void loop() {}
diff --git a/test/testdata/ValidSketch/LICENSE b/test/testdata/ValidSketch/LICENSE
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/ValidSketch/README.md b/test/testdata/ValidSketch/README.md
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/ValidSketch/ValidSketch.ino b/test/testdata/ValidSketch/ValidSketch.ino
new file mode 100644
index 00000000..e51f794f
--- /dev/null
+++ b/test/testdata/ValidSketch/ValidSketch.ino
@@ -0,0 +1,2 @@
+void setup() {]
+void loop() {}
diff --git a/test/testdata/compliance/Invalid/Invalid Sketch.ino b/test/testdata/compliance/Invalid/Invalid Sketch.ino
new file mode 100644
index 00000000..e51f794f
--- /dev/null
+++ b/test/testdata/compliance/Invalid/Invalid Sketch.ino	
@@ -0,0 +1,2 @@
+void setup() {]
+void loop() {}
diff --git a/test/testdata/compliance/Permissive/MismatchedFilename.ino b/test/testdata/compliance/Permissive/MismatchedFilename.ino
new file mode 100644
index 00000000..e51f794f
--- /dev/null
+++ b/test/testdata/compliance/Permissive/MismatchedFilename.ino
@@ -0,0 +1,2 @@
+void setup() {]
+void loop() {}
diff --git a/test/testdata/compliance/Specification/Specification.ino b/test/testdata/compliance/Specification/Specification.ino
new file mode 100644
index 00000000..e51f794f
--- /dev/null
+++ b/test/testdata/compliance/Specification/Specification.ino
@@ -0,0 +1,2 @@
+void setup() {]
+void loop() {}
diff --git a/test/testdata/compliance/Strict/LICENSE b/test/testdata/compliance/Strict/LICENSE
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/compliance/Strict/README.md b/test/testdata/compliance/Strict/README.md
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/compliance/Strict/Strict.ino b/test/testdata/compliance/Strict/Strict.ino
new file mode 100644
index 00000000..e51f794f
--- /dev/null
+++ b/test/testdata/compliance/Strict/Strict.ino
@@ -0,0 +1,2 @@
+void setup() {]
+void loop() {}
diff --git a/test/testdata/library-manager/False/False.h b/test/testdata/library-manager/False/False.h
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/library-manager/Invalid/.gitkeep b/test/testdata/library-manager/Invalid/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/library-manager/Submit/Submit.h b/test/testdata/library-manager/Submit/Submit.h
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/library-manager/Submit/library.properties b/test/testdata/library-manager/Submit/library.properties
new file mode 100644
index 00000000..d131eff3
--- /dev/null
+++ b/test/testdata/library-manager/Submit/library.properties
@@ -0,0 +1,9 @@
+name=SomeUniqueLibraryName
+version=1.0.0
+author=Cristian Maglie <c.maglie@example.com>, Pippo Pluto <pippo@example.com>
+maintainer=Cristian Maglie <c.maglie@example.com>
+sentence=A library that makes coding a Webserver a breeze.
+paragraph=Supports HTTP1.1 and you can do GET and POST.
+category=Communication
+url=http://example.com/
+architectures=avr
diff --git a/test/testdata/library-manager/Update/Update.h b/test/testdata/library-manager/Update/Update.h
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/library-manager/Update/library.properties b/test/testdata/library-manager/Update/library.properties
new file mode 100644
index 00000000..e78129d8
--- /dev/null
+++ b/test/testdata/library-manager/Update/library.properties
@@ -0,0 +1,9 @@
+name=Servo
+version=1.1.7
+author=Michael Margolis, Arduino
+maintainer=Arduino <info@arduino.cc>
+sentence=Allows Arduino/Genuino boards to control a variety of servo motors.
+paragraph=This library can control a great number of servos.<br />It makes careful use of timers: the library can control 12 servos using only 1 timer.<br />On the Arduino Due you can control up to 60 servos.<br />
+category=Device Control
+url=http://www.arduino.cc/en/Reference/Servo
+architectures=avr,megaavr,sam,samd,nrf52,stm32f4,mbed
diff --git a/test/testdata/project-type/Library/Library.h b/test/testdata/project-type/Library/Library.h
new file mode 100644
index 00000000..e69de29b
diff --git a/test/testdata/project-type/Library/library.properties b/test/testdata/project-type/Library/library.properties
new file mode 100644
index 00000000..d131eff3
--- /dev/null
+++ b/test/testdata/project-type/Library/library.properties
@@ -0,0 +1,9 @@
+name=SomeUniqueLibraryName
+version=1.0.0
+author=Cristian Maglie <c.maglie@example.com>, Pippo Pluto <pippo@example.com>
+maintainer=Cristian Maglie <c.maglie@example.com>
+sentence=A library that makes coding a Webserver a breeze.
+paragraph=Supports HTTP1.1 and you can do GET and POST.
+category=Communication
+url=http://example.com/
+architectures=avr
diff --git a/test/testdata/project-type/PackageIndex/package_valid_index.json b/test/testdata/project-type/PackageIndex/package_valid_index.json
new file mode 100644
index 00000000..22e5b452
--- /dev/null
+++ b/test/testdata/project-type/PackageIndex/package_valid_index.json
@@ -0,0 +1,68 @@
+{
+  "packages": [
+    {
+      "name": "myboard",
+      "maintainer": "Jane Developer",
+      "websiteURL": "https://github.com/janedeveloper/myboard",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com/forum/myboard"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com/forum/myboard"
+          },
+          "url": "https://janedeveloper.github.io/myboard/myboard-1.0.0.zip",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "SHA-256:ec3ff8a1dc96d3ba6f432b9b837a35fd4174a34b3d2927de1d51010e8b94f9f1",
+          "size": "15005",
+          "boards": [{ "name": "My Board" }, { "name": "My Board Pro" }],
+          "toolsDependencies": [
+            {
+              "packager": "arduino",
+              "name": "avr-gcc",
+              "version": "4.8.1-arduino5"
+            },
+            {
+              "packager": "arduino",
+              "name": "avrdude",
+              "version": "6.0.1-arduino5"
+            }
+          ]
+        },
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.1",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com/forum/myboard"
+          },
+          "url": "https://janedeveloper.github.io/myboard/myboard-1.0.1.zip",
+          "archiveFileName": "myboard-1.0.1.zip",
+          "checksum": "SHA-256:9c86ee28a7ce9fe33e8b07ec643316131e0031b0d22e63bb398902a5fdadbca9",
+          "size": "15125",
+          "boards": [{ "name": "My Board" }, { "name": "My Board Pro" }],
+          "toolsDependencies": [
+            {
+              "packager": "arduino",
+              "name": "avr-gcc",
+              "version": "4.8.1-arduino5"
+            },
+            {
+              "packager": "arduino",
+              "name": "avrdude",
+              "version": "6.0.1-arduino5"
+            }
+          ]
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/test/testdata/project-type/Platform/boards.txt b/test/testdata/project-type/Platform/boards.txt
new file mode 100644
index 00000000..28dddb07
--- /dev/null
+++ b/test/testdata/project-type/Platform/boards.txt
@@ -0,0 +1,8 @@
+uno.name=Arduino Uno
+
+uno.build.core=arduino
+uno.build.variant=standard
+
+uno.upload.tool=avrdude
+uno.upload.maximum_size=32256
+uno.upload.maximum_data_size=2048
diff --git a/test/testdata/project-type/Sketch/Sketch.ino b/test/testdata/project-type/Sketch/Sketch.ino
new file mode 100644
index 00000000..660bdbcc
--- /dev/null
+++ b/test/testdata/project-type/Sketch/Sketch.ino
@@ -0,0 +1,2 @@
+void setup() {}
+void loop() {}
diff --git a/test/testdata/recursive/SpecificationSketch/SpecificationSketch.ino b/test/testdata/recursive/SpecificationSketch/SpecificationSketch.ino
new file mode 100644
index 00000000..e51f794f
--- /dev/null
+++ b/test/testdata/recursive/SpecificationSketch/SpecificationSketch.ino
@@ -0,0 +1,2 @@
+void setup() {]
+void loop() {}
diff --git a/test/testdata/verbose/HasWarnings/HasWarnings.ino b/test/testdata/verbose/HasWarnings/HasWarnings.ino
new file mode 100644
index 00000000..660bdbcc
--- /dev/null
+++ b/test/testdata/verbose/HasWarnings/HasWarnings.ino
@@ -0,0 +1,2 @@
+void setup() {}
+void loop() {}