Use poetry inside the tox build

azure-pipelines/ci-build.yml

@@ -11,17 +11,22 @@ trigger:
 - release
 
 jobs:
-- template: run-tox-env.yml@tox
-  parameters:
-    name: CI
-    tox_version: 'tox'
-    jobs:
-      py37:
-        image: [linux, windows, macOs]
+- job: CI
+  steps:
+  - template: get-poetry.yml
+  - template: run-tox-env.yml@tox
+    parameters:
+      name: CI
+      tox_version: 'tox'
+      jobs:
+        py37:
+          image: [linux, windows, macOs]
 
 - ${{ if eq(variables['Build.SourceBranch'], 'refs/heads/release') }}:
-  - template: publish-pypi.yml@tox
-    parameters:
-      dependsOn: [CI]
-      external_feed: 'extra_qt'
-      pypi_remote: ''
+  - job: Publish
+    steps:
+    - template: publish-pypi.yml@tox
+      parameters:
+        dependsOn: [CI]
+        external_feed: 'extra_qt'
+        pypi_remote: ''

azure-pipelines/get-poetry.yml

@@ -0,0 +1,8 @@
+# We use poetry inside tox, so we need to make sure we have that configured first.
+
+steps:
+  - task: UsePythonVersion@0
+    inputs:
+      versionSpec: '3.7'
+  - script: python -m pip install --upgrade pip
+  - script: python -m pip install --user poetry

tox.ini

@@ -1,11 +1,14 @@
 [tox]
+isolated_build = true
 envlist = py37
 
 [testenv]
+whitelist_externals = poetry
 basepython = python3.7
 deps =
     pytest
     pytest-cov
 commands =
-    pytest -c "pytest.ini"
+    poetry install -v
+    poetry run pytest -c "pytest.ini"