chore: import upstream snapshot with attribution

tests/utils/test_string_utils.py

@@ -0,0 +1,94 @@
+import pytest
+
+from mlflow.utils.string_utils import (
+    format_table_cell_value,
+    is_string_type,
+    mslex_quote,
+    strip_prefix,
+    strip_suffix,
+)
+
+
+@pytest.mark.parametrize(
+    (("original", "prefix", "expected")),
+    [("smoketest", "smoke", "test"), ("", "test", ""), ("", "", ""), ("test", "", "test")],
+)
+def test_strip_prefix(original, prefix, expected):
+    assert strip_prefix(original, prefix) == expected
+
+
+@pytest.mark.parametrize(
+    ("original", "suffix", "expected"),
+    [("smoketest", "test", "smoke"), ("", "test", ""), ("", "", ""), ("test", "", "test")],
+)
+def test_strip_suffix(original, suffix, expected):
+    assert strip_suffix(original, suffix) == expected
+
+
+def test_is_string_type():
+    assert is_string_type("validstring")
+    assert is_string_type("")
+    assert is_string_type((b"dog").decode("utf-8"))
+    assert not is_string_type(None)
+    assert not is_string_type(["teststring"])
+    assert not is_string_type([])
+    assert not is_string_type({})
+    assert not is_string_type({"test": "string"})
+    assert not is_string_type(12)
+    assert not is_string_type(12.7)
+
+
+def test_mslex_quote():
+    assert mslex_quote("abc") == "abc"
+    assert mslex_quote("a b c") == '"a b c"'
+    assert mslex_quote("C:\\path\\to\\file") == "C:\\path\\to\\file"
+
+
+def test_format_table_cell_value_basic():
+    result = format_table_cell_value("field", "value")
+    assert result == "value"
+
+
+def test_format_table_cell_value_empty():
+    result = format_table_cell_value("field", None, [])
+    assert result == "N/A"
+
+
+def test_format_table_cell_value_multiple():
+    values = ["a", "b", "c", "d", "e"]
+    result = format_table_cell_value("field", None, values)
+    assert result == "a, b, c, ... (+2 more)"
+
+
+def test_format_table_cell_value_timestamp():
+    timestamp = "2025-01-15T10:31:24.123Z"
+    result = format_table_cell_value("info.request_time", timestamp)
+    assert "2025-01-15" in result
+    assert "10:31:24" in result
+
+
+def test_format_table_cell_value_duration_ms():
+    result = format_table_cell_value("info.execution_duration_ms", 500)
+    assert result == "500ms"
+
+
+def test_format_table_cell_value_duration_seconds():
+    result = format_table_cell_value("info.execution_duration_ms", 2500)
+    assert result == "2.5s"
+
+
+def test_format_table_cell_value_preview_truncation():
+    long_text = "This is a very long preview text that should be truncated"
+    result = format_table_cell_value("info.request_preview", long_text)
+    assert result == "This is a very lo..."
+    assert len(result) == 20
+
+
+def test_format_table_cell_value_invalid_timestamp():
+    result = format_table_cell_value("info.request_time", "invalid-timestamp")
+    assert result == "invalid-timestamp"  # Should return original
+
+
+def test_format_table_cell_value_invalid_duration():
+    result = format_table_cell_value("info.execution_duration_ms", "not-a-number")
+    assert result == "not-a-number"  # Should return original