[SPT-1668] Don't split comma-separated str values for *_any_of params

massive/rest/base.py

@@ -194,7 +194,10 @@ def _get_params(
                             # using ., and not _ (removesuffix would work)
                             # but that is python 3.9+
                             argname = argname[: -len(f"_{ext}")] + f".{ext}"
-                    if argname.endswith("any_of"):
+                    # any_of accepts a comma-separated str (per the spec) or a
+                    # list of values; only join the latter, since joining a str
+                    # would split it into single characters
+                    if argname.endswith("any_of") and not isinstance(val, str):
                         val = ",".join(val)
                     params[argname] = val
 

test_rest/mocks/stocks/v1/dividends&ticker.any_of=AAPL%2CVZ.json

@@ -0,0 +1,34 @@
+{
+  "results": [
+    {
+      "id": "E1e778b36bcedb4d1589a970be52c16294ad4bc89c8627d56a3b970f6cf2a6e10",
+      "ticker": "AAPL",
+      "record_date": "2026-08-10",
+      "pay_date": "2026-08-13",
+      "declaration_date": "2026-07-30",
+      "ex_dividend_date": "2026-08-10",
+      "frequency": 4,
+      "cash_amount": 0.27,
+      "currency": "USD",
+      "distribution_type": "recurring",
+      "historical_adjustment_factor": 0.999138,
+      "split_adjusted_cash_amount": 0.27
+    },
+    {
+      "id": "Ebff20941049b81e8d1cc80d5ef0cf7b9e44318993597f922292327578e468954",
+      "ticker": "VZ",
+      "record_date": "2026-10-09",
+      "pay_date": "2026-11-02",
+      "declaration_date": "2026-09-09",
+      "ex_dividend_date": "2026-10-09",
+      "frequency": 4,
+      "cash_amount": 0.7075,
+      "currency": "USD",
+      "distribution_type": "recurring",
+      "historical_adjustment_factor": 0.984736,
+      "split_adjusted_cash_amount": 0.7075
+    }
+  ],
+  "status": "OK",
+  "request_id": "6a7e466379af0a71039d60cc78e72282"
+}

test_rest/test_dividends.py

@@ -1,4 +1,4 @@
-from massive.rest.models import Dividend
+from massive.rest.models import Dividend, StockDividend
 from base import BaseTest
 
 
@@ -108,3 +108,43 @@ def test_list_dividends(self):
             ),
         ]
         self.assertEqual(dividends, expected)
+
+    def test_list_stocks_dividends_ticker_any_of(self):
+        expected = [
+            StockDividend(
+                cash_amount=0.27,
+                currency="USD",
+                declaration_date="2026-07-30",
+                distribution_type="recurring",
+                ex_dividend_date="2026-08-10",
+                frequency=4,
+                historical_adjustment_factor=0.999138,
+                id="E1e778b36bcedb4d1589a970be52c16294ad4bc89c8627d56a3b970f6cf2a6e10",
+                pay_date="2026-08-13",
+                record_date="2026-08-10",
+                split_adjusted_cash_amount=0.27,
+                ticker="AAPL",
+            ),
+            StockDividend(
+                cash_amount=0.7075,
+                currency="USD",
+                declaration_date="2026-09-09",
+                distribution_type="recurring",
+                ex_dividend_date="2026-10-09",
+                frequency=4,
+                historical_adjustment_factor=0.984736,
+                id="Ebff20941049b81e8d1cc80d5ef0cf7b9e44318993597f922292327578e468954",
+                pay_date="2026-11-02",
+                record_date="2026-10-09",
+                split_adjusted_cash_amount=0.7075,
+                ticker="VZ",
+            ),
+        ]
+        # a comma-separated str must be sent as-is, not split into characters
+        dividends = [d for d in self.c.list_stocks_dividends(ticker_any_of="AAPL,VZ")]
+        self.assertEqual(dividends, expected)
+        # a list of values is still joined with commas
+        dividends = [
+            d for d in self.c.list_stocks_dividends(ticker_any_of=["AAPL", "VZ"])  # type: ignore
+        ]
+        self.assertEqual(dividends, expected)

test_rest/test_snapshots.py

@@ -511,6 +511,8 @@ def test_list_snapshot_indices(self):
     def test_get_snapshot_indices(self):
         ticker_any_of = ["SPX", "APx", "APy"]
         summary_results = self.c.get_snapshot_indices(ticker_any_of)
+        # the comma-separated str form must build the same request
+        self.assertEqual(self.c.get_snapshot_indices("SPX,APx,APy"), summary_results)
         expected = [
             IndicesSnapshot(
                 value=3822.39,