Add missing PyprojectTOMLManager manager and test (#365)

Author: nathanjmcdougall

src/usethis/_interface/tool.py

@@ -51,7 +51,10 @@ def coverage(
     quiet: bool = quiet_opt,
     frozen: bool = frozen_opt,
 ) -> None:
-    with usethis_config.set(offline=offline, quiet=quiet, frozen=frozen):
+    with (
+        usethis_config.set(offline=offline, quiet=quiet, frozen=frozen),
+        PyprojectTOMLManager(),
+    ):
         _run_tool(use_coverage, remove=remove)
 
 

tests/usethis/_interface/test_tool.py

@@ -26,6 +26,16 @@ def test_add(self, tmp_path: Path):
         assert result.exit_code == 0, result.output
 
 
+class TestCoverage:
+    @pytest.mark.usefixtures("_vary_network_conn")
+    def test_cli(self, uv_init_dir: Path):
+        with change_cwd(uv_init_dir):
+            if not usethis_config.offline:
+                call_subprocess(["usethis", "tool", "coverage"])
+            else:
+                call_subprocess(["usethis", "tool", "coverage", "--offline"])
+
+
 class TestDeptry:
     @pytest.mark.usefixtures("_vary_network_conn")
     def test_cli(self, uv_init_dir: Path):