Implement tests for MetadataRemover

ImageCore.Tests/TestMetadataRemover.cs

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+using Image.Compressor;
+using Image.Remover;
+using ImageMagick;
+using Moq;
+using Xunit;
+
+namespace ImageCore.Tests
+{
+    public class TestMetadataRemover
+    {
+        [Fact]
+        public void TestCleanImage()
+        {
+            // Setup
+            var magicImageMock = new Mock<IMagickImage>();
+            var compressorMock = new Mock<ICompressor>();
+            var metadataRemover = new ExifMetadataRemoverAndCompressor(magicImageMock.Object, compressorMock.Object);
+            
+            // Test
+            metadataRemover.CleanImage("path");
+            
+            // Assert
+            magicImageMock.Verify( i => i.RemoveProfile("exif"));
+            magicImageMock.Verify( i => i.Write("path"));
+            compressorMock.Verify( i => i.Compress("path"));
+        }
+    }
+}