Move `export_informative` function to `gn3.db.traits` module

Issue:
https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/partial-correlations.gmi

* gn3/db/traits.py: Move `export_informative` function here
* gn3/partial_correlations.py: Remove `export_informative` function
* tests/unit/db/test_traits.py: Move `export_informative` function tests here
* tests/unit/test_partial_correlations.py: Remove `export_informative`
  function tests

  The `export_informative` function relates more to the traits than to the
  partial correlations, and could find use in more than just the partial
  correlations stuff. This commit moves the function to the more
  traits-specific `gn3.db.traits` module.

2 files changed, 87 insertions, 86 deletions

diff --git a/tests/unit/db/test_traits.py b/tests/unit/db/test_traits.py
index 0c4ef78..67f0c6f 100644
--- a/tests/unit/db/test_traits.py
+++ b/tests/unit/db/test_traits.py
@@ -3,6 +3,7 @@ from unittest import mock, TestCase
 from gn3.db.traits import (
     build_trait_name,
     export_trait_data,
+    export_informative,
     set_haveinfo_field,
     update_sample_data,
     retrieve_trait_info,
@@ -315,3 +316,88 @@ class TestTraitsDBFunctions(TestCase):
                         trait_data, samplelist, dtype=dtype, var_exists=vflag,
                         n_exists=nflag),
                     expected)
+
+    def test_export_informative(self):
+        """Test that the function exports appropriate data."""
+        for trait_data, inc_var, expected in [
+                [{"data": {
+                    "sample1": {
+                        "sample_name": "sample1", "value": 9, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample2": {
+                        "sample_name": "sample2", "value": 8, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample3": {
+                        "sample_name": "sample3", "value": 7, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample4": {
+                        "sample_name": "sample4", "value": 6, "variance": None,
+                        "ndata": 13
+                    },
+                }}, 0, (
+                    ("sample1", "sample2", "sample3", "sample4"), (9, 8, 7, 6),
+                    (None, None, None, None))],
+                [{"data": {
+                    "sample1": {
+                        "sample_name": "sample1", "value": 9, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample2": {
+                        "sample_name": "sample2", "value": 8, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample3": {
+                        "sample_name": "sample3", "value": None, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample4": {
+                        "sample_name": "sample4", "value": 6, "variance": None,
+                        "ndata": 13
+                    },
+                }}, 0, (
+                    ("sample1", "sample2", "sample4"), (9, 8, 6),
+                    (None, None, None))],
+                [{"data": {
+                    "sample1": {
+                        "sample_name": "sample1", "value": 9, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample2": {
+                        "sample_name": "sample2", "value": 8, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample3": {
+                        "sample_name": "sample3", "value": 7, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample4": {
+                        "sample_name": "sample4", "value": 6, "variance": None,
+                        "ndata": 13
+                    },
+                }}, True, (tuple(), tuple(), tuple())],
+                [{"data": {
+                    "sample1": {
+                        "sample_name": "sample1", "value": 9, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample2": {
+                        "sample_name": "sample2", "value": 8, "variance": 0.657,
+                        "ndata": 13
+                    },
+                    "sample3": {
+                        "sample_name": "sample3", "value": 7, "variance": None,
+                        "ndata": 13
+                    },
+                    "sample4": {
+                        "sample_name": "sample4", "value": 6, "variance": None,
+                        "ndata": 13
+                    },
+                }}, 0, (
+                    ("sample1", "sample2", "sample3", "sample4"), (9, 8, 7, 6),
+                    (None, 0.657, None, None))]]:
+            with self.subTest(trait_data=trait_data):
+                self.assertEqual(
+                    export_informative(trait_data, inc_var), expected)
diff --git a/tests/unit/test_partial_correlations.py b/tests/unit/test_partial_correlations.py
index 6eea078..f204d4f 100644
--- a/tests/unit/test_partial_correlations.py
+++ b/tests/unit/test_partial_correlations.py
@@ -1,92 +1,7 @@
 """Module contains tests for gn3.partial_correlations"""
 
 from unittest import TestCase
-from gn3.partial_correlations import export_informative
+
 
 class TestPartialCorrelations(TestCase):
     """Class for testing partial correlations computation functions"""
-
-    def test_export_informative(self):
-        """Test that the function exports appropriate data."""
-        for trait_data, inc_var, expected in [
-                [{"data": {
-                    "sample1": {
-                        "sample_name": "sample1", "value": 9, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample2": {
-                        "sample_name": "sample2", "value": 8, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample3": {
-                        "sample_name": "sample3", "value": 7, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample4": {
-                        "sample_name": "sample4", "value": 6, "variance": None,
-                        "ndata": 13
-                    },
-                }}, 0, (
-                    ("sample1", "sample2", "sample3", "sample4"), (9, 8, 7, 6),
-                    (None, None, None, None))],
-                [{"data": {
-                    "sample1": {
-                        "sample_name": "sample1", "value": 9, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample2": {
-                        "sample_name": "sample2", "value": 8, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample3": {
-                        "sample_name": "sample3", "value": None, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample4": {
-                        "sample_name": "sample4", "value": 6, "variance": None,
-                        "ndata": 13
-                    },
-                }}, 0, (
-                    ("sample1", "sample2", "sample4"), (9, 8, 6),
-                    (None, None, None))],
-                [{"data": {
-                    "sample1": {
-                        "sample_name": "sample1", "value": 9, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample2": {
-                        "sample_name": "sample2", "value": 8, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample3": {
-                        "sample_name": "sample3", "value": 7, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample4": {
-                        "sample_name": "sample4", "value": 6, "variance": None,
-                        "ndata": 13
-                    },
-                }}, True, (tuple(), tuple(), tuple())],
-                [{"data": {
-                    "sample1": {
-                        "sample_name": "sample1", "value": 9, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample2": {
-                        "sample_name": "sample2", "value": 8, "variance": 0.657,
-                        "ndata": 13
-                    },
-                    "sample3": {
-                        "sample_name": "sample3", "value": 7, "variance": None,
-                        "ndata": 13
-                    },
-                    "sample4": {
-                        "sample_name": "sample4", "value": 6, "variance": None,
-                        "ndata": 13
-                    },
-                }}, 0, (
-                    ("sample1", "sample2", "sample3", "sample4"), (9, 8, 7, 6),
-                    (None, 0.657, None, None))]]:
-            with self.subTest(trait_data=trait_data):
-                self.assertEqual(
-                    export_informative(trait_data, inc_var), expected)