asl3 commented on code in PR #41606:
URL: https://github.com/apache/spark/pull/41606#discussion_r1254808047
##########
python/pyspark/testing/utils.py:
##########
@@ -209,3 +232,144 @@ def check_error(
self.assertEqual(
expected, actual, f"Expected message parameters was '{expected}',
got '{actual}'"
)
+
+
+def assertDataFrameEqual(
+ df: DataFrame, expected: Union[DataFrame, List[Row]], ignore_row_order:
bool = True
+):
+ """
+ A util function to assert equality between DataFrames `df` and `expected`,
with
+ optional parameter `ignore_row_order`.
+
+ For float values, assert approximate equality (1e-5 by default).
+
+ Parameters
+ ----------
+ df : DataFrame
+ expected : DataFrame or List of Row
+ ignore_row_order: bool, default True
+ """
+ if df is None and expected is None:
+ return True
+ elif df is None or expected is None:
+ return False
+
+ try:
+ # If Spark Connect dependencies are available, allow Spark Connect
DataFrame
+ from pyspark.sql.connect.dataframe import DataFrame as ConnectDataFrame
+
+ if not isinstance(df, DataFrame) and not isinstance(df,
ConnectDataFrame):
+ raise PySparkAssertionError(
+ error_class="UNSUPPORTED_DATA_TYPE",
+ message_parameters={"data_type": type(df)},
+ )
+ elif not isinstance(expected, DataFrame) and not isinstance(expected,
ConnectDataFrame):
+ raise PySparkAssertionError(
+ error_class="UNSUPPORTED_DATA_TYPE",
+ message_parameters={"data_type": type(expected)},
+ )
+ except:
+ if not isinstance(df, DataFrame):
+ raise PySparkAssertionError(
+ error_class="UNSUPPORTED_DATA_TYPE",
+ message_parameters={"data_type": type(df)},
+ )
+ elif not isinstance(expected, DataFrame):
+ raise PySparkAssertionError(
+ error_class="UNSUPPORTED_DATA_TYPE",
+ message_parameters={"data_type": type(expected)},
+ )
+
+ def rename_duplicate_cols(input_df):
+ df_cols = input_df.columns
+
+ duplicate_col_indices = [idx for idx, val in enumerate(df_cols) if val
in df_cols[:idx]]
+
+ # Create a new list by renaming duplicate
+ # columns by adding prefix '_duplicate_'+index
+ for i in duplicate_col_indices:
+ df_cols[i] = df_cols[i] + "_duplicate_" + str(i)
+
+ # Rename duplicate columns
+ result_df = input_df.toDF(*df_cols)
+
+ return result_df
+
+ def compare_rows(r1: Row, r2: Row):
+ def compare_vals(val1, val2):
+ if isinstance(val1, list) and isinstance(val2, list):
+ return len(val1) == len(val2) and all(
+ compare_vals(x, y) for x, y in zip(val1, val2)
+ )
+ elif isinstance(val1, Row) and isinstance(val2, Row):
+ return all(compare_vals(x, y) for x, y in zip(val1, val2))
+ elif isinstance(val1, dict) and isinstance(val2, dict):
+ return (
+ len(val1.keys()) == len(val2.keys())
+ and val1.keys() == val2.keys()
+ and all(compare_vals(val1[k], val2[k]) for k in
val1.keys())
+ )
+ elif isinstance(val1, float) and isinstance(val2, float):
+ if abs(val1 - val2) > 1e-5:
+ return False
+ else:
+ if val1 != val2:
+ return False
+ return True
+
+ if r1 is None and r2 is None:
+ return True
+ elif r1 is None or r2 is None:
+ return False
+
+ return compare_vals(r1, r2)
+
+ def assert_schema_equal(
+ df_schema: StructType,
+ expected_schema: StructType,
+ ):
+ if df_schema != expected_schema:
+ raise PySparkAssertionError(
+ error_class="DIFFERENT_SCHEMA",
+ message_parameters={"df_schema": df_schema, "expected_schema":
expected_schema},
+ )
+
+ def assert_rows_equal(rows1: Row, rows2: Row):
+ zipped = list(zip_longest(rows1, rows2))
+ rows_equal = True
+ error_msg = "Results do not match: "
+ diff_msg = ""
+ diff_rows_cnt = 0
+
+ for r1, r2 in zipped:
+ if not compare_rows(r1, r2):
+ rows_equal = False
+ diff_rows_cnt += 1
+ diff_msg += (
+ "[df]" + "\n" + str(r1) + "\n\n" + "[expected]" + "\n" +
str(r2) + "\n\n"
+ )
+ diff_msg += "********************" + "\n\n"
+
+ if not rows_equal:
+ percent_diff = diff_rows_cnt / len(zipped)
+ error_msg += "( %.5f %% )" % percent_diff
+ error_msg += "\n" + diff_msg
+ raise PySparkAssertionError(
+ error_class="DIFFERENT_ROWS",
+ message_parameters={"error_msg": error_msg},
+ )
+
+ if ignore_row_order:
+ try:
+ df = rename_duplicate_cols(df)
+ expected = rename_duplicate_cols(expected)
Review Comment:
it's needed for `df.sort`, but cleaned up the code to retain old df column
names
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