Test for #735

src/test/java/io/github/classgraph/issues/issue735/Issue735.java

@@ -0,0 +1,37 @@
+package io.github.classgraph.issues.issue735;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+import io.github.classgraph.ClassGraph;
+import io.github.classgraph.ClassInfo;
+import io.github.classgraph.ScanResult;
+
+public class Issue735 {
+    static interface Base<T> {
+        T get();
+    }
+
+    static class Derived1 implements Base<String> {
+        public String get() {
+            return null;
+        }
+    }
+
+    static abstract class Derived2 implements Base<String> {
+    }
+
+    @Test
+    void genericSuperclass() {
+        try (ScanResult scanResult = new ClassGraph().acceptPackages(Issue735.class.getPackage().getName())
+                .enableAllInfo().ignoreClassVisibility().ignoreMethodVisibility().scan()) {
+            ClassInfo ci1 = scanResult.getClassInfo(Derived1.class.getName());
+            assertThat(ci1.getMethodInfo().get(0).getTypeSignatureOrTypeDescriptor().getResultType().toString())
+                    .isEqualTo(String.class.getName());
+            ClassInfo ci2 = scanResult.getClassInfo(Derived2.class.getName());
+            assertThat(ci2.getMethodInfo().get(0).getTypeSignatureOrTypeDescriptor().getResultType().toString())
+                    .isEqualTo("T");
+        }
+    }
+}