Fix parse to properly support multipleOf (to avoid validation error)

target_postgres/json_schema.py

@@ -1,6 +1,7 @@
 from copy import deepcopy
 import json
 import re
+import decimal
 
 from jsonschema import Draft4Validator
 from jsonschema.exceptions import SchemaError
@@ -20,7 +21,8 @@
     float: NUMBER,
     bool: BOOLEAN,
     str: STRING,
-    type(None): NULL
+    type(None): NULL,
+    decimal.Decimal: NUMBER
 }
 
 

target_postgres/target_tools.py

@@ -4,6 +4,7 @@
 import pkg_resources
 import sys
 import threading
+import decimal
 
 import singer
 from singer import utils, metadata, metrics
@@ -90,7 +91,7 @@ def _report_invalid_records(streams):
 def _line_handler(state_tracker, target, invalid_records_detect, invalid_records_threshold, max_batch_rows,
                   max_batch_size, line):
     try:
-        line_data = json.loads(line)
+        line_data = json.loads(line, parse_float=decimal.Decimal)
     except json.decoder.JSONDecodeError:
         LOGGER.error("Unable to parse JSON: {}".format(line))
         raise

tests/unit/test_BufferedSingerStream.py

@@ -1,9 +1,10 @@
+from decimal import Decimal
 from copy import deepcopy
 
 import pytest
 
 from target_postgres import singer
-from target_postgres.singer_stream import BufferedSingerStream, SingerStreamError
+from target_postgres.singer_stream import BufferedSingerStream, SingerStreamError, RAW_LINE_SIZE
 
 from utils.fixtures import CatStream, InvalidCatStream, CATS_SCHEMA
 
@@ -75,6 +76,73 @@ def test_add_record_message__invalid_record():
     assert [] == missing_sdc_properties(singer_stream)
 
 
+SIMPLE_MULTIPLE_OF_VALID_SCHEMA = {
+    'properties': {
+        'multipleOfKey': {
+            'type': 'number',
+            'multipleOf': Decimal('1e-15')
+        }
+    }
+}
+
+SIMPLE_MULTIPLE_OF_INVALID_SCHEMA = {
+    'properties': {
+        'multipleOfKey': {
+            'type': 'number',
+            'multipleOf': 1e-15
+        }
+    }
+}
+
+def test_add_record_message__multipleOf():
+    stream_name = 'test'
+    singer_stream = BufferedSingerStream(stream_name,
+                                         deepcopy(SIMPLE_MULTIPLE_OF_VALID_SCHEMA),
+                                         [])
+
+    multiple_of_values = ['1', '2', '3', '4', '5', '1.1', '2.3', '1.23456789', '20', '100.1']
+
+    for value in multiple_of_values:
+        singer_stream.add_record_message(
+            {
+                'type': 'RECORD',
+                'stream': stream_name,
+                'record': {'multipleOfKey': Decimal(value)},
+                'sequence': 0,
+                RAW_LINE_SIZE: 100
+            }
+        )
+
+    assert not singer_stream.peek_invalid_records()
+    assert singer_stream.count == len(multiple_of_values)
+    assert [] == missing_sdc_properties(singer_stream)
+
+
+def test_add_record_message__multipleOf_invalid_record():
+    stream_name = 'test'
+    singer_stream = BufferedSingerStream(stream_name,
+                                         deepcopy(SIMPLE_MULTIPLE_OF_INVALID_SCHEMA),
+                                         [])
+
+    multiple_of_values = [1, 2]
+
+    for value in multiple_of_values:
+        with pytest.raises(SingerStreamError):
+            singer_stream.add_record_message(
+                {
+                    'type': 'RECORD',
+                    'stream': stream_name,
+                    'record': {'multipleOfKey': value},
+                    'sequence': 0,
+                    RAW_LINE_SIZE: 100
+                }
+            )
+
+    assert singer_stream.peek_invalid_records()
+    assert singer_stream.count == 0
+    assert [] == missing_sdc_properties(singer_stream)
+
+
 SIMPLE_ALLOF_SCHEMA = {
   'type': 'object',
   'properties': {

tests/unit/test_json_schema.py

@@ -1,4 +1,5 @@
 import re
+import decimal
 
 import pytest
 
@@ -31,6 +32,8 @@ def test_python_type():
            == json_schema.STRING
     assert json_schema.python_type('world') \
            == json_schema.STRING
+    assert json_schema.python_type(decimal.Decimal(1)) \
+           == json_schema.NUMBER
 
 
 def test_is_object():

tests/unit/test_target_tools.py

@@ -115,6 +115,45 @@ class TestStream(ListStream):
     assert rows_persisted == expected_rows
 
 
+def test_record_with_multiple_of():
+    values = [1, 1.0, 2, 2.0, 3, 7, 10.1]
+    records = []
+    for value in values:
+        records.append({
+            "type": "RECORD",
+            "stream": "test",
+            "record": {"multipleOfKey": value},
+        })
+
+    class TestStream(ListStream):
+        stream = [
+            {
+                "type": "SCHEMA",
+                "stream": "test",
+                "schema": {
+                    "properties": {
+                        "multipleOfKey": {
+                            "type": "number",
+                            "multipleOf": 1e-15
+                        }
+                    }
+                },
+                "key_properties": []
+            }
+        ] + records
+
+    target = Target()
+
+    target_tools.stream_to_target(TestStream(), target, config=CONFIG.copy())
+
+    expected_rows = len(records)
+    rows_persisted = 0
+    for call in target.calls['write_batch']:
+        rows_persisted += call['records_count']
+
+    assert rows_persisted == expected_rows
+
+
 def test_state__capture(capsys):
     stream = [
         json.dumps({'type': 'STATE', 'value': {'test': 'state-1'}}),