FileConventions.Test: add failing test

`Contains()` method catches a lot of false-positives and not
suitable for this situation so we used regex.

Co-authored-by: Parham <[email protected]>

Author: Mersho

src/FileConventions.Test/DummyFiles/DummyScriptWithEmptyString.fsx

@@ -0,0 +1 @@
+let myString = "\"Hello World\""

src/FileConventions.Test/DummyFiles/DummyScriptWithMatchEmptyString.fsx

@@ -0,0 +1,5 @@
+let temp = "Hello World"
+
+match temp with
+| "" -> failwith "Empty String"
+| _ -> failwith "Non-Empty String"

src/FileConventions.Test/FileConventions.Test.fs

@@ -614,6 +614,32 @@ let DefiningEmptyStringsWithDoubleQuotes2() =
     Assert.That(DefiningEmptyStringsWithDoubleQuotes fileInfo, Is.EqualTo true)
 
 
+[<Test>]
+let DefiningEmptyStringsWithDoubleQuotes3() =
+    let fileInfo =
+        FileInfo(
+            Path.Combine(
+                dummyFilesDirectory.FullName,
+                "DummyScriptWithEmptyString.fsx"
+            )
+        )
+
+    Assert.That(DefiningEmptyStringsWithDoubleQuotes fileInfo, Is.EqualTo false)
+
+
+[<Test>]
+let DefiningEmptyStringsWithDoubleQuotes4() =
+    let fileInfo =
+        FileInfo(
+            Path.Combine(
+                dummyFilesDirectory.FullName,
+                "DummyScriptWithMatchEmptyString.fsx"
+            )
+        )
+
+    Assert.That(DefiningEmptyStringsWithDoubleQuotes fileInfo, Is.EqualTo false)
+
+
 [<Test>]
 let ProjFilesNamingConvention1() =
     let fileInfo =

src/FileConventions.Test/FileConventions.Test.fsproj

@@ -28,6 +28,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <None Include="DummyFiles\DummyScriptWithEmptyString.fsx" />
+    <None Include="DummyFiles\DummyScriptWithMatchEmptyString.fsx" />
     <None Include="DummyFiles\DummyFsprojWithAsterisk.fsproj" />
     <None Include="DummyFiles\DummyWithShebang.fsx" />
     <None Include="DummyFiles\DummyWithWrongShebang.fsx" />