From fde01ea57d79ef75aee407e7568f5cdcf980974b Mon Sep 17 00:00:00 2001
From: Caden Myers <cjm2304@columbia.edu>
Date: Fri, 10 Oct 2025 09:50:42 -0400
Subject: [PATCH 1/3] build temp dir structure

---
 tests/conftest.py | 78 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/tests/conftest.py b/tests/conftest.py
index 3eaae7d..ebcfad9 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -22,6 +22,84 @@ def tmp_examples(tmp_path_factory):
     yield tmp_examples
 
 
+@pytest.fixture(scope="session")
+def example_cases(tmp_path_factory):
+    """Copy the entire examples tree into a temp directory once per test
+    session.
+
+    Returns the path to that copy.
+    """
+    root_temp_dir = tmp_path_factory.mktemp("temp")
+
+    # case 1: pack with no examples
+    case1ex_dir = root_temp_dir / "case1" / "docs" / "examples"
+    case1 = case1ex_dir / "empty_pack"  # empty_pack
+    case1.mkdir(parents=True, exist_ok=True)
+    case1req_dir = root_temp_dir / "case1" / "requirements" / "packs"
+    case1req_dir.mkdir(parents=True, exist_ok=True)
+
+    # Case 2: pack with multiple examples
+    case2ex_dir = root_temp_dir / "case2" / "docs" / "examples"
+    case2a = (
+        case2ex_dir / "full_pack" / "ex1" / "solution" / "diffpy-cmi"
+    )  # full_pack, ex1
+    case2a.mkdir(parents=True, exist_ok=True)
+    (case2a / "script1.py").touch()
+    case2b = (
+        case2ex_dir / "full_pack" / "ex2" / "random" / "path"
+    )  # full_pack, ex2
+    case2b.mkdir(parents=True, exist_ok=True)
+    (case2b / "script1.py").touch()
+    (case2b / "script2.py").touch()
+    case2req_dir = root_temp_dir / "case2" / "requirements" / "packs"
+    case2req_dir.mkdir(parents=True, exist_ok=True)
+
+    # Case 3: multiple packs with multiple examples
+    case3ex_dir = root_temp_dir / "case3" / "docs" / "examples"
+    case3a = case3ex_dir / "packA" / "ex1"  # packA, ex1
+    case3a.mkdir(parents=True, exist_ok=True)
+    (case3a / "script1.py").touch()
+    case3b = case3ex_dir / "packA" / "ex2" / "solutions"  # packA, ex2
+    case3b.mkdir(parents=True, exist_ok=True)
+    (case3b / "script2.py").touch()
+    case3c = (
+        case3ex_dir / "packB" / "ex3" / "more" / "random" / "path"
+    )  # packB, ex3
+    case3c.mkdir(parents=True, exist_ok=True)
+    (case3c / "script3.py").touch()
+    (case3c / "script4.py").touch()
+    case3req_dir = root_temp_dir / "case3" / "requirements" / "packs"
+    case3req_dir.mkdir(parents=True, exist_ok=True)
+
+    # Case 4: no pack found (empty directory)
+    case4ex_dir = root_temp_dir / "case4" / "docs" / "examples"
+    case4 = case4ex_dir
+    case4.mkdir(parents=True, exist_ok=True)
+    case4req_dir = root_temp_dir / "case4" / "requirements" / "packs"
+    case4req_dir.mkdir(parents=True, exist_ok=True)
+
+    # Case 5: multiple packs with the same example names
+    case5ex_dir = root_temp_dir / "case5" / "docs" / "examples"
+    case5a = case5ex_dir / "packA" / "ex1" / "path1"  # packA, ex1
+    case5a.mkdir(parents=True, exist_ok=True)
+    (case5a / "script1.py").touch()
+    case5b = case5ex_dir / "packB" / "ex1" / "path2"  # packB, ex1
+    case5b.mkdir(parents=True, exist_ok=True)
+    (case5b / "script2.py").touch()
+    case5req_dir = root_temp_dir / "case5" / "requirements" / "packs"
+    case5req_dir.mkdir(parents=True, exist_ok=True)
+
+    yield root_temp_dir
+
+
+@pytest.fixture(scope="session")
+def target_dir(tmp_path_factory):
+    """Create a temporary directory to serve as the target for copying
+    examples."""
+    target_directory = tmp_path_factory.mktemp("copy_target")
+    yield target_directory
+
+
 @pytest.fixture(scope="session", autouse=True)
 def use_headless_matplotlib():
     """Force matplotlib to use a headless backend during tests."""

From c60547148f205f98cc34c64b4d12d3e9471586e9 Mon Sep 17 00:00:00 2001
From: Caden Myers <cjm2304@columbia.edu>
Date: Fri, 10 Oct 2025 09:51:29 -0400
Subject: [PATCH 2/3] news

---
 news/tmpdir-build.rst | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 news/tmpdir-build.rst

diff --git a/news/tmpdir-build.rst b/news/tmpdir-build.rst
new file mode 100644
index 0000000..0042860
--- /dev/null
+++ b/news/tmpdir-build.rst
@@ -0,0 +1,23 @@
+**Added:**
+
+* Add temp dir fixture for testing.
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>

From 5ac0487a56a3d8b41ffb94198de9630f22c41f1c Mon Sep 17 00:00:00 2001
From: Caden Myers <cjm2304@columbia.edu>
Date: Fri, 10 Oct 2025 09:54:00 -0400
Subject: [PATCH 3/3] rm unrelated function

---
 tests/conftest.py | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/tests/conftest.py b/tests/conftest.py
index ebcfad9..5a4edca 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -92,14 +92,6 @@ def example_cases(tmp_path_factory):
     yield root_temp_dir
 
 
-@pytest.fixture(scope="session")
-def target_dir(tmp_path_factory):
-    """Create a temporary directory to serve as the target for copying
-    examples."""
-    target_directory = tmp_path_factory.mktemp("copy_target")
-    yield target_directory
-
-
 @pytest.fixture(scope="session", autouse=True)
 def use_headless_matplotlib():
     """Force matplotlib to use a headless backend during tests."""