Added comprehensive unit tests

Author: amuraru

.github/workflows/ci.yaml

@@ -17,8 +17,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
-        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+        os: [ubuntu-latest, macos-latest]
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
 
     steps:
     - name: Checkout code
@@ -65,7 +65,7 @@ jobs:
 
     - name: Upload coverage to Codecov
       if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.14'
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         file: ./coverage.xml
         flags: unittests
@@ -159,7 +159,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.14'
 

README.md

@@ -489,7 +489,7 @@ flake8 .
 
 This project uses GitHub Actions for continuous integration. The CI pipeline:
 
-- **Tests**: Runs on Python 3.8-3.12 across Ubuntu, macOS, and Windows
+- **Tests**: Runs on Python 3.8-3.14 across Ubuntu and macOS
 - **Security**: Runs bandit security checks and safety dependency checks
 - **Build**: Builds and validates the package
 - **Integration**: Tests CLI tools and package installation

himl/remote_state.py

@@ -10,14 +10,19 @@
 
 import json
 
+# boto3 is imported only when needed to avoid requiring it for basic himl functionality
+boto3 = None
 try:
     import boto3
-except ImportError as e:
-    raise Exception('Error while trying to read remote state, package "boto3" is required and cannot be imported: %s' % e)
+except ImportError:
+    # boto3 will be None, and we'll raise an error only when S3 functionality is used
+    pass
 
 class S3TerraformRemoteStateRetriever:
     @staticmethod
     def get_s3_client(bucket_name, bucket_key, boto_profile):
+        if boto3 is None:
+            raise ImportError('boto3 package is required for S3 remote state functionality. Install with: pip install himl[aws]')
         session = boto3.session.Session(profile_name=boto_profile)
         client = session.client('s3')
         try:

pyproject.toml

@@ -22,14 +22,16 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Topic :: System :: Systems Administration",
     "Topic :: Utilities",
 ]
 requires-python = ">=3.9"
 dependencies = [
     "PyYAML>=5.1",
-    "deepmerge>=0.1.0",
+    "deepmerge>=1.1.1,<2.0",
     "pathlib2>=2.3.0",
 ]
 

setup.py

@@ -7,7 +7,7 @@
     _readme = f.read()
 
 _install_requires = [
-    'deepmerge==1.1.1',
+    'deepmerge>=1.1.1,<2.0',
     'lru_cache==0.2.3',
     'backports.functools_lru_cache==2.0.0',
     'pathlib2==2.3.7',