Bring Coverage of build.py to 100%

pyproject.toml

@@ -66,3 +66,19 @@ requires = [
     "incremental == 17.5.0",
 ]
 build-backend = "setuptools.build_meta"
+
+[tool.coverage.run]
+parallel = true
+branch = true
+source = ["towncrier"]
+
+[tool.coverage.paths]
+source = ["src", ".tox/*/site-packages"]
+
+[tool.coverage.report]
+show_missing = true
+skip_covered = true
+omit = [
+    "src/towncrier/__main__.py",
+    "src/towncrier/test/*",
+]

src/towncrier/test/test_build.py

@@ -3,6 +3,7 @@
 
 import os
 
+from datetime import date
 from pathlib import Path
 from subprocess import call
 from textwrap import dedent
@@ -280,6 +281,33 @@ def run_order_scenario(sections, types):
             ),
         )
 
+    def test_draft_no_date(self):
+        """
+        If no date is passed, today's date is used.
+        """
+        runner = CliRunner()
+
+        with runner.isolated_filesystem():
+            setup_simple_project()
+            fragment_path1 = "foo/newsfragments/123.feature"
+            fragment_path2 = "foo/newsfragments/124.feature.rst"
+            with open(fragment_path1, "w") as f:
+                f.write("Adds levitation")
+            with open(fragment_path2, "w") as f:
+                f.write("Extends levitation")
+
+            call(["git", "init"])
+            call(["git", "config", "user.name", "user"])
+            call(["git", "config", "user.email", "user@example.com"])
+            call(["git", "add", "."])
+            call(["git", "commit", "-m", "Initial Commit"])
+
+            today = date.today()
+            result = runner.invoke(_main, ["--draft"])
+
+            self.assertEqual(0, result.exit_code)
+            self.assertIn(f"Foo 1.2.3 ({today.isoformat()})", result.output)
+
     def test_no_confirmation(self):
         runner = CliRunner()
 

tox.ini

@@ -21,7 +21,7 @@ commands = check-manifest
 [testenv]
 deps =
    Twisted
-   coverage
+   coverage[toml]
    incremental
 
 commands =