CodeCoverage: Apply ccrewrite filter on C# only

Apply Branch-Coverage Code-Contract ccrewrite filter only to C#(.cs)
files

Author: Dragan

src/AddIns/Analysis/CodeCoverage/Project/Src/CodeCoverageMethodElement.cs

@@ -92,7 +92,7 @@ void Init()
 				if (results != null) {
 					this.FileName = results.GetFileName(this.FileID);
 					try {
-						this.FileNameExt = Path.GetExtension(this.FileName);
+						this.FileNameExt = Path.GetExtension(this.FileName).ToLowerInvariant();
 					}
 					catch {}
 					if (cacheFileName != this.FileName) {
@@ -226,14 +226,19 @@ void GetSequencePointContent(CodeCoverageSequencePoint sp)
 		// -> this method SP with lowest Line/Column
 		void getBodyStartSP() {
 			if (this.SequencePoints.Count != 0) {
-				foreach (CodeCoverageSequencePoint sp in this.SequencePoints) {
-					if (sp.FileID != this.FileID) continue;
-					if (this.BodyStartSP == null || (sp.Line < this.BodyStartSP.Line) ||
-					   (sp.Line == this.BodyStartSP.Line && sp.Column < this.BodyStartSP.Column)
-					   ) {
-						this.BodyStartSP = sp;
+				if (this.FileNameExt == ".cs") {
+					foreach (CodeCoverageSequencePoint sp in this.SequencePoints) {
+						if (sp.FileID != this.FileID) continue;
+						if (this.BodyStartSP == null || (sp.Line < this.BodyStartSP.Line) ||
+						   (sp.Line == this.BodyStartSP.Line && sp.Column < this.BodyStartSP.Column)
+						   ) {
+							this.BodyStartSP = sp;
+						}
 					}
 				}
+				else {
+					this.BodyStartSP = this.SequencePoints.First();
+				}
 			}
 		}
 
@@ -242,29 +247,34 @@ void getBodyStartSP() {
 		// and lowest Offset (when duplicated bw ccrewrite)
 		void getBodyFinalSP() {
 			if (this.SequencePoints.Count != 0) {
-				for (int i = this.SequencePoints.Count-1; i > 0; i--) {
-					var sp = this.SequencePoints[i];
-					if (sp.FileID != this.FileID) continue;
-					if (sp.Content != "}") continue;
-					if (this.BodyFinalSP == null || (sp.Line > this.BodyFinalSP.Line) ||
-					   (sp.Line == this.BodyFinalSP.Line && sp.Column >= this.BodyFinalSP.Column)
-					   ) {
-						// ccrewrite ContractClass/ContractClassFor
-						// adds duplicate method end-sequence-point "}"
-						//
-						// Take duplicate BodyFinalSP with lower Offset
-						// Because IL.Offset of second duplicate
-						// will extend branch coverage of this method
-						// by coverage of ContractClassFor inserted SequencePoint!
-						if (this.BodyFinalSP != null &&
-							sp.Line == this.BodyFinalSP.Line &&
-							sp.Column == this.BodyFinalSP.Column &&
-							sp.Offset < this.BodyFinalSP.Offset) {
-							this.SequencePoints.Remove(this.BodyFinalSP); // remove duplicate
+				if (this.FileNameExt == ".cs") {
+					for (int i = this.SequencePoints.Count-1; i > 0; i--) {
+						var sp = this.SequencePoints[i];
+						if (sp.FileID != this.FileID) continue;
+						if (sp.Content != "}") continue;
+						if (this.BodyFinalSP == null || (sp.Line > this.BodyFinalSP.Line) ||
+						   (sp.Line == this.BodyFinalSP.Line && sp.Column >= this.BodyFinalSP.Column)
+						   ) {
+							// ccrewrite ContractClass/ContractClassFor
+							// adds duplicate method end-sequence-point "}"
+							//
+							// Take duplicate BodyFinalSP with lower Offset
+							// Because IL.Offset of second duplicate
+							// will extend branch coverage of this method
+							// by coverage of ContractClassFor inserted SequencePoint!
+							if (this.BodyFinalSP != null &&
+								sp.Line == this.BodyFinalSP.Line &&
+								sp.Column == this.BodyFinalSP.Column &&
+								sp.Offset < this.BodyFinalSP.Offset) {
+								this.SequencePoints.Remove(this.BodyFinalSP); // remove duplicate
+							}
+							this.BodyFinalSP = sp;
 						}
-						this.BodyFinalSP = sp;
 					}
 				}
+				else {
+					this.BodyFinalSP = this.SequencePoints.Last();
+				}
 			}
 		}
 
@@ -279,6 +289,9 @@ int GetSequencePointsCount() {
 			return 0;
 		}
 
+		const string @assert = "Assert";
+		const string @contract = "Contract";
+
 		void GetBranchRatio () {
 
 			this.BranchCoverageRatio = null;
@@ -301,30 +314,29 @@ void GetBranchRatio () {
 				// SequencePoint is visited and belongs to this method?
 				if (sp.VisitCount != 0 && sp.FileID == this.FileID) {
 
-					// Don't want branch coverage of ccrewrite(n)
-					// SequencePoint's with offset before and after method body
-					if (sp.Offset < BodyStartSP.Offset ||
-						sp.Offset > BodyFinalSP.Offset) {
-						sp.BranchCoverage = true;
-						continue; // skip
-					}
-
 					if (this.FileNameExt == ".cs") {
-						// 0) Only for C#
+						// Only for C#
+
+						// Don't want branch coverage of ccrewrite(n)
+						// SequencePoint(s) with offset before and after method body
+						if (sp.Offset < BodyStartSP.Offset ||
+							sp.Offset > BodyFinalSP.Offset) {
+							sp.BranchCoverage = true;
+							continue; // skip
+						}
+
 						// 1) Generated "in" code for IEnumerables contains hidden "try/catch/finally" branches that
 						// one do not want or cannot cover by test-case because is handled earlier at same method.
 						// ie: NullReferenceException in foreach loop is pre-handled at method entry, ie. by Contract.Require(items!=null)
 						// 2) Branches within sequence points "{" and "}" are not source branches but compiler generated branches
 						// ie: static methods start sequence point "{" contains compiler generated branches
 						// 3) Exclude Contract class (EnsuresOnThrow/Assert/Assume is inside method body)
 						// 4) Exclude NUnit Assert(.Throws) class
-						const string assert = "Assert";
-						const string contract = "Contract";
 						if (sp.Content == "in" || sp.Content == "{" || sp.Content == "}" ||
-						    sp.Content.StartsWith(assert + ".", StringComparison.Ordinal) ||
-						    sp.Content.StartsWith(assert + " ", StringComparison.Ordinal) ||
-						    sp.Content.StartsWith(contract + ".", StringComparison.Ordinal) ||
-						    sp.Content.StartsWith(contract + " ", StringComparison.Ordinal)
+						    sp.Content.StartsWith(@assert + ".", StringComparison.Ordinal) ||
+						    sp.Content.StartsWith(@assert + " ", StringComparison.Ordinal) ||
+						    sp.Content.StartsWith(@contract + ".", StringComparison.Ordinal) ||
+						    sp.Content.StartsWith(@contract + " ", StringComparison.Ordinal)
 						   ) {
 							sp.BranchCoverage = true;
 							continue; // skip