Feature/uniqe constraints

EntityFramework.Explained/Schema/Indexes/UniqueConstraints.cs

@@ -0,0 +1,47 @@
+using EntityFramework.Explained._Tools.Helpers;
+using EntityFramework.Explained._Tools.TestContexts;
+using Microsoft.EntityFrameworkCore;
+using QuickPulse.Explains;
+using QuickPulse.Explains.Text;
+
+namespace EntityFramework.Explained.Schema.Conventions;
+
+[DocFile]
+public class UniqueConstraints
+{
+    [Index(nameof(Name), IsUnique = true)]
+    public class Thing
+    {
+        public int Id { get; set; }
+        public string Name { get; set; } = default!;
+    }
+
+    [Index(nameof(Name), nameof(Id), IsUnique = true, IsDescending = new[] { false, true })]
+    public class CombinedThing
+    {
+        public int Id { get; set; }
+        public string Name { get; set; } = default!;
+    }
+
+    [Fact]
+    [DocHeader("Sql Server")]
+    [DocContent("Has unique index on Name.")]
+    public void SqlServer()
+    {
+        using var context = new TestSqlServerContext<Thing>();
+        var sql = context.Database.GenerateCreateScript();
+        var reader = LinesReader.FromText(sql);
+        Assert.Contains("CREATE UNIQUE INDEX [IX_Items_Name] ON [Items] ([Name]);", reader.SkipToLineContaining("INDEX"));
+    }
+
+    [Fact]
+    [DocHeader("Sqlite")]
+    [DocContent("Has combined unique index on Name and Id with a descending order on Id.")]
+    public void Sqlite()
+    {
+        using var context = new TestSqliteContext<CombinedThing>();
+        var sql = context.Database.GenerateCreateScript();
+        var reader = LinesReader.FromText(sql);
+        Assert.Contains("CREATE UNIQUE INDEX \"IX_Items_Name_Id\" ON \"Items\" (\"Name\", \"Id\" DESC);", reader.SkipToLineContaining("Index"));
+    }
+}

README.md

@@ -30,6 +30,12 @@ has entity with a default index
 #### Sql Server
 has entity with combined sorted index
 #### Sqlite
+Generates `TEXT`.
+### Unique Constraints
+#### Sql Server
+Has unique index.
+#### Sqlite
+Has combined unique index
 has entity with a default index
 #### Sqlite
 has entity with combined sorted index