[CodeCompletion] Fixed code completion bug.

ICSharpCode.NRefactory.CSharp/Completion/CSharpCompletionEngine.cs

@@ -444,7 +444,7 @@ namespace ICSharpCode.NRefactory.CSharp.Completion
 					if (token == "=") {
 						int j = tokenIndex;
 						string prevToken = GetPreviousToken(ref j, false);
-						if (prevToken == "=" || prevToken == "+" || prevToken == "-") {
+						if (prevToken == "=" || prevToken == "+" || prevToken == "-" || prevToken == "!") {
 							token = prevToken + token;
 							tokenIndex = j;
 						}
@@ -481,14 +481,13 @@ namespace ICSharpCode.NRefactory.CSharp.Completion
 							return null;
 						case "=":
 						case "==":
+						case "!=":
 							GetPreviousToken(ref tokenIndex, false);
 							var expressionOrVariableDeclaration = GetExpressionAt(tokenIndex);
 							if (expressionOrVariableDeclaration == null) {
 								return null;
 							}
-							
 							resolveResult = ResolveExpression(expressionOrVariableDeclaration);
-							
 							if (resolveResult == null) {
 								return null;
 							}

ICSharpCode.NRefactory.Tests/CSharp/CodeCompletion/CodeCompletionAccessibleTests.cs

@@ -1183,24 +1183,71 @@ class TestClass
 		public void TestEnumInBinaryOperatorExpression ()
 		{
 			CodeCompletionBugTests.CombinedProviderTest (
-@"
+				@"
 [Flags]
 public enum TestEnum { A, B, C}
 
 class TestClass
 {
+public void Foo ()
+{
+$TestEnum test = TestEnum.A | T$
+}
+}", provider => {
+				Assert.IsNotNull (provider.Find ("TestEnum"), "enum 'TestEnum' not found.");
+				Assert.IsNotNull (provider.Find ("TestEnum.A"), "enum 'TestEnum.A' not found.");
+				Assert.IsNotNull (provider.Find ("TestEnum.B"), "enum 'TestEnum.B' not found.");
+				Assert.IsNotNull (provider.Find ("TestEnum.C"), "enum 'TestEnum.C' not found.");
+			});
+		}
+		
+		[Test()]
+		public void TestEnumComparison ()
+		{
+			var provider = CodeCompletionBugTests.CreateProvider(
+				@"
+public enum TestEnum { A, B, C}
+
+class TestClass
+{
+	public static TestEnum A (int i, int j, string s) {}
+
 	public void Foo ()
 	{
-		$TestEnum test = TestEnum.A | T$
+		$if (A(1,2,""foo"") == $
 	}
-}", provider => {
+}");
+			Assert.IsFalse(provider.AutoCompleteEmptyMatch);
 			Assert.IsNotNull (provider.Find ("TestEnum"), "enum 'TestEnum' not found.");
 			Assert.IsNotNull (provider.Find ("TestEnum.A"), "enum 'TestEnum.A' not found.");
 			Assert.IsNotNull (provider.Find ("TestEnum.B"), "enum 'TestEnum.B' not found.");
 			Assert.IsNotNull (provider.Find ("TestEnum.C"), "enum 'TestEnum.C' not found.");
-			});
 		}
+
 		
+		[Test()]
+		public void TestEnumComparisonCase2 ()
+		{
+			var provider = CodeCompletionBugTests.CreateProvider(
+				@"
+public enum TestEnum { A, B, C}
+
+class TestClass
+{
+	public static TestEnum A (int i, int j, string s) {}
+
+	public void Foo ()
+	{
+		$if (A(1,2,""foo"") != $
+	}
+}");
+			Assert.IsFalse(provider.AutoCompleteEmptyMatch);
+			Assert.IsNotNull (provider.Find ("TestEnum"), "enum 'TestEnum' not found.");
+			Assert.IsNotNull (provider.Find ("TestEnum.A"), "enum 'TestEnum.A' not found.");
+			Assert.IsNotNull (provider.Find ("TestEnum.B"), "enum 'TestEnum.B' not found.");
+			Assert.IsNotNull (provider.Find ("TestEnum.C"), "enum 'TestEnum.C' not found.");
+		}
+
 		[Test()]
 		public void TestPrimimitiveTypeCompletionString ()
 		{