test(NODE-7451): sync spec tests for server selection (#4880)

Author: tadjik1

test/spec/server-selection/server_selection/ReplicaSetWithPrimary/read/SecondaryPreferred_empty_tags.json

@@ -0,0 +1,41 @@
+{
+  "topology_description": {
+    "type": "ReplicaSetWithPrimary",
+    "servers": [
+      {
+        "address": "a:27017",
+        "avg_rtt_ms": 5,
+        "type": "RSPrimary"
+      },
+      {
+        "address": "b:27017",
+        "avg_rtt_ms": 5,
+        "type": "RSSecondary"
+      }
+    ]
+  },
+  "operation": "read",
+  "read_preference": {
+    "mode": "SecondaryPreferred",
+    "tag_sets": [
+      {
+        "data_center": "nyc"
+      },
+      {}
+    ]
+  },
+  "suitable_servers": [
+    {
+      "address": "b:27017",
+      "avg_rtt_ms": 5,
+      "type": "RSSecondary"
+    }
+  ],
+  "in_latency_window": [
+    {
+      "address": "b:27017",
+      "avg_rtt_ms": 5,
+      "type": "RSSecondary"
+    }
+  ]
+}

test/spec/server-selection/server_selection/ReplicaSetWithPrimary/read/SecondaryPreferred_empty_tags.yml

@@ -0,0 +1,26 @@
+# Attempt to select the secondary using an empty tag set. Expect empty tag set to match.
+# This is a regression test for RUST-2363.
+---
+topology_description:
+  type: ReplicaSetWithPrimary
+  servers:
+    - &1
+      address: a:27017
+      avg_rtt_ms: 5
+      type: RSPrimary
+      # No "tags".
+    - &2
+      address: b:27017
+      avg_rtt_ms: 5
+      type: RSSecondary
+      # No "tags"
+operation: read
+read_preference:
+  mode: SecondaryPreferred
+  tag_sets:
+    - data_center: nyc # Does not match.
+    - {} # Empty tag set.
+suitable_servers:
+  - *2
+in_latency_window:
+  - *2