Skip included directories that don't exist quietly, rather than throwing.

Author: jherby2k

src/coverlet.core/Helpers/InstrumentationHelper.cs

@@ -264,8 +264,7 @@ private static IEnumerable<string> ExpandIncludeDirectories(string[] includeDire
                     ? Path.GetFullPath(Path.Combine(moduleDirectory, includeDirectory))
                     : includeDirectory).TrimEnd('*');
 
-                if (!Directory.Exists(fullPath))
-                    throw new DirectoryNotFoundException($"The included directory '{fullPath}' does not exist.");
+                if (!Directory.Exists(fullPath)) continue;
 
                 if (includeDirectory.EndsWith("*", StringComparison.Ordinal))
                     result.AddRange(Directory.GetDirectories(fullPath));

test/coverlet.core.tests/Helpers/InstrumentationHelperTests.cs

@@ -225,14 +225,6 @@ public void TestIsTypeExcludedAndIncludedWithMatchingAndMismatchingFilter(string
             Assert.True(result);
         }
 
-        [Fact]
-        public void TestIncludeDirectoryInvalidThrowsDirectoryNotFoundException()
-        {
-            string module = typeof(InstrumentationHelperTests).Assembly.Location;
-            Assert.Throws<DirectoryNotFoundException>(() =>
-                InstrumentationHelper.GetCoverableModules(module, new[] {"Foobar"}));
-        }
-
         [Fact]
         public void TestIncludeDirectories()
         {