fix firstOrDefault

Author: Ihar Yakimush

SolrNet.Linq.IntegrationTests/EnumeratedTests.cs

@@ -1,4 +1,5 @@
-using System.Linq;
+using System;
+using System.Linq;
 using System.Threading.Tasks;
 using Xunit;
 
@@ -66,14 +67,39 @@ public void OrDefault()
             Assert.Null(t2);
         }
 
+        [Fact]
+        public void Throw()
+        {
+            Assert.Throws<InvalidOperationException>(() =>
+                Product.SolrOperations.Value.AsQueryable().First(p => p.Id == "qwe"));
+            Assert.Throws<InvalidOperationException>(() =>
+                Product.SolrOperations.Value.AsQueryable().Single(p => p.Id == "qwe"));
+            Assert.Throws<InvalidOperationException>(() => Product.SolrOperations.Value.AsQueryable().Single());           
+        }
+
+        [Fact]
+        public async Task ThrowAsync()
+        {
+            await Assert.ThrowsAsync<InvalidOperationException>(() =>
+                Product.SolrOperations.Value.AsQueryable().FirstAsync(p => p.Id == "qwe"));
+
+            await Assert.ThrowsAsync<InvalidOperationException>(() =>
+                Product.SolrOperations.Value.AsQueryable().SingleAsync(p => p.Id == "qwe"));
+            await Assert.ThrowsAsync<InvalidOperationException>(() => Product.SolrOperations.Value.AsQueryable().SingleAsync());
+        }
+
         [Fact]
         public async Task OrDefaultAsync()
         {
             Product t1 = await Product.SolrOperations.Value.AsQueryable().FirstOrDefaultAsync(p => p.Id == "qwe");
-            Product t2 = await Product.SolrOperations.Value.AsQueryable().SingleOrDefaultAsync(p => p.Id == "qwe");
+            Product t2 = await Product.SolrOperations.Value.AsQueryable().Where(p => p.Id == "qwe").FirstOrDefaultAsync();
+            Product t3 = await Product.SolrOperations.Value.AsQueryable().SingleOrDefaultAsync(p => p.Id == "qwe");
+            Product t4 = await Product.SolrOperations.Value.AsQueryable().Where(p => p.Id == "qwe").SingleOrDefaultAsync();
 
             Assert.Null(t1);
             Assert.Null(t2);
+            Assert.Null(t3);
+            Assert.Null(t4);
         }
     }
 }

SolrNet.Linq/SolrLinqExtensions.cs

@@ -48,7 +48,7 @@ public static async Task<TSource> FirstOrDefaultAsync<TSource>(this IQueryable<T
                     null,
                     GetMethod<TSource>(nameof(Queryable.FirstOrDefault), 1), query.Expression));
 
-                return result.First();
+                return result.FirstOrDefault();
             }
 
             return query.FirstOrDefault();
@@ -62,7 +62,7 @@ public static async Task<TSource> FirstOrDefaultAsync<TSource>(this IQueryable<T
                     null,
                     GetMethod<TSource>(nameof(Queryable.FirstOrDefault), 2), query.Expression, predicate));
 
-                return result.First();
+                return result.FirstOrDefault();
             }
 
             return query.FirstOrDefault(predicate);
@@ -104,7 +104,7 @@ public static async Task<TSource> SingleOrDefaultAsync<TSource>(this IQueryable<
                     null,
                     GetMethod<TSource>(nameof(Queryable.SingleOrDefault), 1), query.Expression));
 
-                return result.Single();
+                return result.SingleOrDefault();
             }
 
             return query.SingleOrDefault();
@@ -118,7 +118,7 @@ public static async Task<TSource> SingleOrDefaultAsync<TSource>(this IQueryable<
                     null,
                     GetMethod<TSource>(nameof(Queryable.SingleOrDefault), 2), query.Expression, predicate));
 
-                return result.Single();
+                return result.SingleOrDefault();
             }
 
             return query.SingleOrDefault(predicate);

SolrNet.Linq/SolrNet.Linq.csproj

@@ -6,14 +6,14 @@
     <AssemblyOriginatorKeyFile>sgn.snk</AssemblyOriginatorKeyFile>
     <Authors>IharYakimush</Authors>
     <Company />
-    <Description>SolrNet IQueryable provider. Extend SolrNet functionality by adding limited linq to solr support.</Description>
+    <Description>SolrNet IQueryable provider. Extend SolrNet functionality by adding linq to solr support for basic methods.</Description>
     <PackageLicenseUrl>https://github.com/IharYakimush/solr-net-linq/blob/master/LICENSE</PackageLicenseUrl>
     <PackageProjectUrl>https://github.com/IharYakimush/solr-net-linq</PackageProjectUrl>
     <PackageTags>solr solrnet linq</PackageTags>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <Version>1.2.0</Version>
-    <PackageReleaseNotes>support First(), FirstOrDefault(). Single(), SingleOrDefault() methods</PackageReleaseNotes>
+    <PackageReleaseNotes>support First(), FirstOrDefault(). Single(), SingleOrDefault() methods and its async versions</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>