Add unit test

enigma/src/test/java/org/quiltmc/enigma/TestTokensSimilarClassNames.java

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+package org.quiltmc.enigma;
+
+import org.junit.jupiter.api.Test;
+import org.quiltmc.enigma.api.Enigma;
+import org.quiltmc.enigma.api.EnigmaProject;
+import org.quiltmc.enigma.api.ProgressListener;
+import org.quiltmc.enigma.api.class_provider.JarClassProvider;
+import org.quiltmc.enigma.api.source.DecompiledClassSource;
+import org.quiltmc.enigma.api.source.Decompiler;
+import org.quiltmc.enigma.api.source.Decompilers;
+import org.quiltmc.enigma.api.source.SourceSettings;
+import org.quiltmc.enigma.api.source.Token;
+import org.quiltmc.enigma.api.source.TokenType;
+import org.quiltmc.enigma.api.translation.representation.entry.ClassEntry;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.Collection;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+public class TestTokensSimilarClassNames {
+	private static final Path JAR = TestUtil.obfJar("similar_class_names");
+
+	@Test
+	public void testSimilarClassNames() throws IOException {
+		EnigmaProject project = openProject();
+		ClassEntry alpha = TestEntryFactory.newClass(getClassName("Alpha"));
+		Decompiler decompiler = Decompilers.VINEFLOWER.create(new JarClassProvider(JAR), new SourceSettings(false, false));
+		DecompiledClassSource decomp = new DecompiledClassSource(alpha, decompiler.getUndocumentedSource(getClassName("Alpha")).index());
+		DecompiledClassSource source = decomp.remapSource(project, project.getRemapper().getDeobfuscator());
+		Collection<Token> tokens = source.getHighlightedTokens().get(TokenType.OBFUSCATED);
+		for (Token token : tokens) {
+			assertFalse(token.text.startsWith("Alphabet"));
+		}
+	}
+
+	private static String getClassName(String className) {
+		return "org/quiltmc/enigma/input/similar_class_names/" + className;
+	}
+
+	private static EnigmaProject openProject() {
+		try {
+			Enigma enigma = Enigma.create();
+			return enigma.openJar(JAR, new JarClassProvider(JAR), ProgressListener.createEmpty());
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+	}
+}

enigma/src/test/java/org/quiltmc/enigma/input/similar_class_names/Alpha.java

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+package org.quiltmc.enigma.input.similar_class_names;
+
+public interface Alpha {
+	char get(int n);
+}

enigma/src/test/java/org/quiltmc/enigma/input/similar_class_names/Alphabet.java

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+package org.quiltmc.enigma.input.similar_class_names;
+
+public class Alphabet {
+	public static class Inner {
+		public Alpha get() {
+			return new Alpha() {
+				@Override
+				public char get(int n) {
+					return 0;
+				}
+			};
+		}
+	}
+}

enigma/src/test/java/org/quiltmc/enigma/input/similar_class_names/Caller.java

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+package org.quiltmc.enigma.input.similar_class_names;
+
+public class Caller {
+	public void call() {
+		new Alphabet.Inner().get();
+	}
+}

enigma/src/test/resources/proguard-similar_class_names-test.conf

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+-repackageclasses
+-allowaccessmodification
+-dontoptimize
+-dontshrink
+-keepparameternames
+-keepattributes
+-keep class org.quiltmc.enigma.input.Keep
+-keep class org.quiltmc.enigma.input.similar_class_names.*
+