Add test

code/DeltaKustoAdxIntegrationTest/Policies/Partitioning/PartitioningPolicyTest.cs

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+using DeltaKustoIntegration.Database;
+using DeltaKustoLib.CommandModel;
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace DeltaKustoAdxIntegrationTest.Policies.Partitioning
+{
+    public class PartitioningPolicyTest : AdxAutoIntegrationTestBase
+    {
+        protected override string StatesFolderPath => "Policies/Partitioning";
+    }
+}

code/DeltaKustoAdxIntegrationTest/Policies/Partitioning/States/another-policy.kql

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+.create table MyPartitioningTable(TIMESTAMP: datetime, TenantId:string, Level: int)
+
+.alter table MyPartitioningTable policy partitioning ```
+{
+  "PartitionKeys": [
+    {
+      "ColumnName": "TenantId",
+      "Kind": "Hash",
+      "Properties": {
+        "Function": "XxHash64",
+        "MaxPartitionCount": 32,
+        "PartitionAssignmentMode": "Uniform"
+      }
+    }
+  ]
+}```

code/DeltaKustoAdxIntegrationTest/Policies/Partitioning/States/empty.kql

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+//	Random comment
+
+.create table MyPartitioningTable(TIMESTAMP: datetime, TenantId:string, Level: int)
+

code/DeltaKustoAdxIntegrationTest/Policies/Partitioning/States/one-policy.kql

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+.create table MyPartitioningTable(TIMESTAMP: datetime, TenantId:string, Level: int)
+
+.alter table MyPartitioningTable policy partitioning ```
+{
+  "PartitionKeys": [
+    {
+      "ColumnName": "TenantId",
+      "Kind": "Hash",
+      "Properties": {
+        "Function": "XxHash64",
+        "MaxPartitionCount": 128,
+        "PartitionAssignmentMode": "Uniform"
+      }
+    }
+  ]
+}```

code/DeltaKustoAdxIntegrationTest/Policies/Partitioning/States/two-policy.kql

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+.create table MyPartitioningTable(TIMESTAMP: datetime, TenantId:string, Level: int)
+
+.alter table MyPartitioningTable policy partitioning
+```
+{
+  "PartitionKeys": [
+    {
+      "ColumnName": "TenantId",
+      "Kind": "Hash",
+      "Properties": {
+        "Function": "XxHash64",
+        "MaxPartitionCount": 128,
+        "PartitionAssignmentMode": "Uniform"
+      }
+    }
+  ]
+}
+```
+
+.create table MyPartitioningTable2(Id:string)
+
+.alter table MyPartitioningTable2 policy partitioning
+```
+{
+  "PartitionKeys": [
+    {
+      "ColumnName": "Id",
+      "Kind": "Hash",
+      "Properties": {
+        "Function": "XxHash64",
+        "MaxPartitionCount": 128,
+        "PartitionAssignmentMode": "Uniform"
+      }
+    }
+  ]
+}
+```