test: monkeypatch print_info test

news/fix-print-test.rst

@@ -0,0 +1,23 @@
+**Added:**
+
+* No news needed.
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>

tests/conftest.py

@@ -1,31 +1,10 @@
 import json
-import os
-import subprocess
 from pathlib import Path
 
 import matplotlib
 import pytest
 
 
-@pytest.fixture(scope="function")
-def conda_env(tmp_path):
-    env_dir = tmp_path / "fake_env"
-    env_dir_str = env_dir.as_posix()
-    shell = os.name == "nt"
-    subprocess.run(
-        ["conda", "create", "-y", "-p", env_dir_str],
-        check=True,
-        capture_output=True,
-        shell=shell,
-    )
-    yield env_dir_str
-    subprocess.run(
-        ["conda", "env", "remove", "-p", env_dir_str, "-y"],
-        check=True,
-        shell=shell,
-    )
-
-
 @pytest.fixture(scope="function")
 def example_cases(tmp_path_factory):
     """Copy the entire examples tree into a temp directory once per test

tests/test_packsmanager.py

@@ -1,10 +1,10 @@
 import os
 import re
-import subprocess
 from pathlib import Path
 
 import pytest
 
+from diffpy.cmi import installer
 from diffpy.cmi.packsmanager import PacksManager
 
 
@@ -372,21 +372,26 @@ def test_copy_examples_force(example_cases, expected_paths, force):
 
 @pytest.mark.parametrize("packs_to_install,expected", install_params)
 def test_print_packs_and_examples(
-    packs_to_install, expected, example_cases, capsys, conda_env
+    packs_to_install, expected, example_cases, capsys, mocker
 ):
-    env_dir_str = Path(conda_env).as_posix()
-    shell = os.name == "nt"
-    req_dir = example_cases / "case5" / "requirements" / "packs"
+    case5dir = example_cases / "case5"
+    req_dir = case5dir / "requirements" / "packs"
+
+    installed_reqs = []
     for pack in packs_to_install:
-        req_file = (req_dir / f"{pack}.txt").as_posix()
-        subprocess.run(
-            ["conda", "install", "-y", "--file", req_file, "-p", env_dir_str],
-            check=True,
-            capture_output=True,
-            text=True,
-            shell=shell,
-        )
-    pm = PacksManager(root_path=example_cases / "case5")
+        req_file = req_dir / f"{pack}.txt"
+        for line in req_file.read_text().splitlines():
+            line = line.strip()
+            if line and not line.startswith("#"):
+                installed_reqs.append(line)
+
+    def mock_is_installed(name: str) -> bool:
+        return name in installed_reqs
+
+    mocker.patch.object(
+        installer, "_is_installed", side_effect=mock_is_installed
+    )
+    pm = PacksManager(root_path=case5dir)
     pm.print_packs()
     pm.print_examples()
     captured = capsys.readouterr()