Omnisharp VS Code Issue 1814 Fix

tests/OmniSharp.Roslyn.CSharp.Tests/SignatureHelpFacts.cs

@@ -153,7 +153,7 @@ private int Foo(int one, int two, int three)
         }
 
         [Fact]
-        public async Task SignatureHelpforAttCtorSingleArg()
+        public async Task SignatureHelpforAttCtorSingleParam()
         {
             const string source =
 @"using System;
@@ -192,7 +192,7 @@ public MyTestAttribute(int value)
             Assert.Equal("int value", signature.Parameters.ElementAt(0).Label);
         }
         [Fact]
-        public async Task SignatureHelpforAttCtorMultipleArg()
+        public async Task SignatureHelpforAttCtorMultipleParam()
         {
             const string source =
 @"using System;
@@ -225,6 +225,36 @@ public MyTestAttribute(int value1,double value2)
             Assert.Equal("double value2", signature.Parameters.ElementAt(1).Label);
         }
 
+        [Fact]
+        public async Task SignatureHelpforAttCtorNoParam()
+        {
+            const string source =
+@"using System;
+[MyTest($$)]
+public class TestClass 
+{
+    public static void Main()
+    {
+    }
+}
+public class MyTestAttribute : Attribute 
+{
+    int value1;
+    double value2;
+    public MyTestAttribute()
+    {
+        this.value1 = 1;
+        this.value2 = 2;
+    }
+}";
+            var actual = await GetSignatureHelp(source);
+            Assert.Single(actual.Signatures);
+            Assert.Equal(0, actual.ActiveParameter);
+            Assert.Equal(0, actual.ActiveSignature);
+            Assert.Equal("MyTestAttribute", actual.Signatures.ElementAt(0).Name);
+            Assert.Empty(actual.Signatures.ElementAt(0).Parameters);
+        }
+
         [Fact]
         public async Task ActiveParameterIsBasedOnComma2()
         {