Add option for unit test coverage (#240)

## Issue
1. We are not defining a lower bound for the `ops` package
2. We are not generating a coverage report for unit tests

## Solution
1. Set `2.6.0` as the lower bound
2. Add option to generate coverage

Author: shayancanonical

poetry.lock

@@ -10,7 +10,7 @@ authors = []
 
 [tool.poetry.dependencies]
 python = "^3.10"
-ops = "<2.10.0"
+ops = "^2.6.0,<2.10.0"
 lightkube = "^0.14.0"
 tenacity = "^8.2.3"
 jinja2 = "^3.1.2"
@@ -19,7 +19,7 @@ requests = "^2.31.0"
 
 [tool.poetry.group.charm-libs.dependencies]
 # data_platform_libs/v0/data_interfaces.py
-ops = "<2.10.0"
+ops = ">=2.0.0"
 # tls_certificates_interface/v1/tls_certificates.py
 cryptography = "*"
 jsonschema = "*"

pyproject.toml

@@ -70,7 +70,7 @@ commands_pre =
     poetry install --only main,charm-libs,unit
 commands =
     # `--numprocesses=120` workaround for extremely high memory usage (and out of memory crashes)
-    poetry run pytest --numprocesses=120 --ignore={[vars]tests_path}/integration/ {posargs}
+    poetry run pytest --numprocesses=120 --cov=src --ignore={[vars]tests_path}/integration/ {posargs}
 
 [testenv:integration]
 description = Run integration tests