Added comprehensive test suite with CI workflow.

pyproject.toml

@@ -7,9 +7,7 @@ authors = [
 ]
 license = "Apache-2.0"
 requires-python = ">=3.14"
-dependencies = [
-    "maubot[encryption]",
-]
+dependencies = []
 
 [project.urls]
 Repository = "https://git.logal.dev/LogalDeveloper/OwncastSentry"
@@ -20,11 +18,17 @@ build-backend = "hatchling.build"
 
 [dependency-groups]
 dev = [
+    "maubot[encryption]>=0.6.0",
+    "aioresponses>=0.7.8",
     "codespell>=2.4.2",
     "hatch>=1.16.5",
     "mypy>=1.19.1",
     "pip-audit>=2.10.0",
+    "pytest>=9.0.2",
+    "pytest-asyncio>=1.3.0",
+    "pytest-cov>=7.0.0",
     "ruff>=0.15.5",
+    "time-machine>=3.2.0",
 ]
 
 [tool.hatch.version]
@@ -84,6 +88,9 @@ select = [
     "PGH",   # pygrep-hooks
     "TC",    # flake8-type-checking
 
+    # Testing
+    "PT",    # flake8-pytest-style
+
     # Ruff-specific
     "RUF",   # Ruff-specific rules
 ]
@@ -92,5 +99,19 @@ ignore = [
     "D213",  # incompatible with D212 (summary on first line)
 ]
 
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+
+[tool.ruff.lint.per-file-ignores]
+"tests/**" = ["S101", "S311"]
+
+[tool.coverage.run]
+source = ["owncastsentry"]
+omit = ["owncastsentry/_version.py"]
+
+[tool.coverage.report]
+show_missing = true
+skip_empty = true
+
 [tool.codespell]
 skip = "uv.lock"