Add AddRange to SourceCollection (#240)

Co-authored-by: Branko Pejić <[email protected]>

Author: rankobp

src/NetEscapades.AspNetCore.SecurityHeaders/Headers/SourceCollection.cs

@@ -29,6 +29,20 @@ public void Add(string source)
         }
     }
 
+    /// <summary>
+    /// Adds a source to the collection for the given directive.
+    /// Calls to <see cref="AddRange"/> are idempotent;
+    /// if the source has already been added, it will not be added again.
+    /// </summary>
+    /// <param name="sources">The sources to add</param>
+    public void AddRange(IEnumerable<string> sources)
+    {
+        foreach (var source in sources)
+        {
+            Add(source);
+        }
+    }
+
     /// <summary>
     /// Removes a source from the collection for the given directive.
     /// Returns true if the source was removed. Returns false if the

test/NetEscapades.AspNetCore.SecurityHeaders.Test/PublicApiTest.PublicApiHasNotChanged.verified.txt

@@ -599,6 +599,7 @@ namespace NetEscapades.AspNetCore.SecurityHeaders.Headers
         public SourceCollection() { }
         public int Count { get; }
         public void Add(string source) { }
+        public void AddRange(System.Collections.Generic.IEnumerable<string> sources) { }
         public System.Collections.Generic.IEnumerator<string> GetEnumerator() { }
         public bool Remove(string source) { }
     }