chore/test: add tests for new clipboard format detection algorithm

Author: PierreSchwang

worldedit-core/src/test/java/com/sk89q/worldedit/extent/clipboard/io/ClipboardFormatsTest.java

@@ -0,0 +1,99 @@
+package com.sk89q.worldedit.extent.clipboard.io;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Path;
+import java.util.Set;
+
+class ClipboardFormatsTest {
+
+    @Test
+    void findByFile() {
+        Assertions.assertSame(
+                BuiltInClipboardFormat.SPONGE_V1_SCHEMATIC,
+                ClipboardFormats.findByFile(getTestSchematic("sponge1.schem"))
+        );
+        Assertions.assertSame(
+                BuiltInClipboardFormat.FAST_V2,
+                ClipboardFormats.findByFile(getTestSchematic("sponge2.schem"))
+        );
+        Assertions.assertSame(
+                BuiltInClipboardFormat.FAST_V3,
+                ClipboardFormats.findByFile(getTestSchematic("sponge3.schem"))
+        );
+        Assertions.assertSame(
+                BuiltInClipboardFormat.MCEDIT_SCHEMATIC,
+                ClipboardFormats.findByFile(getTestSchematic("mcedit.mce"))
+        );
+        Assertions.assertSame(
+                BuiltInClipboardFormat.MINECRAFT_STRUCTURE,
+                ClipboardFormats.findByFile(getTestSchematic("minecraft_structure.nbt"))
+        );
+        Assertions.assertSame(
+                BuiltInClipboardFormat.PNG,
+                ClipboardFormats.findByFile(getTestSchematic("1x1.png"))
+        );
+
+        Assertions.assertNull(
+                ClipboardFormats.findByFile(getTestSchematic("custom_format.xyz"))
+        );
+        ClipboardFormats.registerClipboardFormat(new CustomTestingClipboardFormat());
+        Assertions.assertInstanceOf(
+                CustomTestingClipboardFormat.class,
+                ClipboardFormats.findByFile(getTestSchematic("custom_format.xyz"))
+        );
+    }
+
+    private static File getTestSchematic(String name) {
+        return Path.of("src", "test", "resources", "fastasyncworldedit", "schematics", name).toFile();
+    }
+
+    private static final class CustomTestingClipboardFormat implements ClipboardFormat {
+
+        @Override
+        public String getName() {
+            return "Custom Testing Format";
+        }
+
+        @Override
+        public boolean isFormat(final File file) {
+            return file.getName().endsWith(".xyz");
+        }
+
+        @Override
+        public Set<String> getAliases() {
+            return Set.of();
+        }
+
+        @Override
+        public ClipboardReader getReader(final InputStream inputStream) {
+            return null;
+        }
+
+        @Override
+        public ClipboardWriter getWriter(final OutputStream outputStream) {
+            return null;
+        }
+
+        @Override
+        public String getPrimaryFileExtension() {
+            return "";
+        }
+
+        @Override
+        public Set<String> getFileExtensions() {
+            return Set.of();
+        }
+
+        @Override
+        public Set<String> getExplicitFileExtensions() {
+            return Set.of();
+        }
+
+    }
+
+}

worldedit-core/src/test/resources/fastasyncworldedit/schematics/1x1.png

@@ -0,0 +1 @@
+Hi!