Add test for resolve-all-configs flag

Author: anirudnits

tests/unit/test_settings.py

@@ -238,3 +238,53 @@ def test_as_bool():
         settings._as_bool("falsey")
     with pytest.raises(ValueError):
         settings._as_bool("truthy")
+
+
+def test_find_all_configs(tmpdir):
+    setup_cfg = """
+[isort]
+profile=django
+"""
+
+    pyproject_toml = """
+[tool.isort]
+profile = "hug"
+"""
+
+    isort_cfg = """
+[settings]
+profile=black
+"""
+    dir1 = tmpdir / "subdir1"
+    dir2 = tmpdir / "subdir2"
+    dir3 = tmpdir / "subdir3"
+
+    dir1.mkdir()
+    dir2.mkdir()
+    dir3.mkdir()
+
+    setup_cfg_file = dir1 / "setup.cfg"
+    setup_cfg_file.write_text(setup_cfg, "utf-8")
+
+    pyproject_toml_file = dir2 / "pyproject.toml"
+    pyproject_toml_file.write_text(pyproject_toml, "utf-8")
+
+    isort_cfg_file = dir3 / ".isort.cfg"
+    isort_cfg_file.write_text(isort_cfg, "utf-8")
+
+    config_trie = settings.find_all_configs((str(tmpdir),))
+
+    config_info_1 = config_trie._search(str(dir1 / "test1.py"))
+    assert config_info_1[0] == str(setup_cfg_file)
+    assert "profile" in config_info_1[1] and config_info_1[1]["profile"] == "django"
+
+    config_info_2 = config_trie._search(str(dir2 / "test2.py"))
+    assert config_info_2[0] == str(pyproject_toml_file)
+    assert "profile" in config_info_2[1] and config_info_2[1]["profile"] == "hug"
+
+    config_info_3 = config_trie._search(str(dir3 / "test3.py"))
+    assert config_info_3[0] == str(isort_cfg_file)
+    assert "profile" in config_info_3[1] and config_info_3[1]["profile"] == "black"
+
+    config_info_4 = config_trie._search(str(tmpdir / "file4.py"))
+    assert config_info_4[0] == "default"

tests/unit/test_utils.py

@@ -0,0 +1,38 @@
+from isort.utils import Trie
+
+
+def test_trie():
+    trie_root = Trie("default", {"line_length": 70})
+
+    trie_root._insert("/temp/config1/.isort.cfg", {"line_length": 71})
+    trie_root._insert("/temp/config2/setup.cfg", {"line_length": 72})
+    trie_root._insert("/temp/config3/pyproject.toml", {"line_length": 73})
+
+    # Ensure that appropriate configs are resolved for files in different directories
+    config1 = trie_root._search("/temp/config1/subdir/file1.py")
+    assert config1[0] == "/temp/config1/.isort.cfg"
+    assert config1[1] == {"line_length": 71}
+
+    config1_2 = trie_root._search("/temp/config1/file1_2.py")
+    assert config1_2[0] == "/temp/config1/.isort.cfg"
+    assert config1_2[1] == {"line_length": 71}
+
+    config2 = trie_root._search("/temp/config2/subdir/subsubdir/file2.py")
+    assert config2[0] == "/temp/config2/setup.cfg"
+    assert config2[1] == {"line_length": 72}
+
+    config2_2 = trie_root._search("/temp/config2/subdir/file2_2.py")
+    assert config2_2[0] == "/temp/config2/setup.cfg"
+    assert config2_2[1] == {"line_length": 72}
+
+    config3 = trie_root._search("/temp/config3/subdir/subsubdir/subsubsubdir/file3.py")
+    assert config3[0] == "/temp/config3/pyproject.toml"
+    assert config3[1] == {"line_length": 73}
+
+    config3_2 = trie_root._search("/temp/config3/file3.py")
+    assert config3_2[0] == "/temp/config3/pyproject.toml"
+    assert config3_2[1] == {"line_length": 73}
+
+    config_outside = trie_root._search("/temp/file.py")
+    assert config_outside[0] == "default"
+    assert config_outside[1] == {"line_length": 70}