1 files changed, 27 insertions, 1 deletions
diff --git a/agent/src/test/java/com/code_intelligence/jazzer/instrumentor/InvalidHookMocks.java b/agent/src/test/java/com/code_intelligence/jazzer/instrumentor/InvalidHookMocks.java
index 2723ad6e..0df349ca 100644
--- a/agent/src/test/java/com/code_intelligence/jazzer/instrumentor/InvalidHookMocks.java
+++ b/agent/src/test/java/com/code_intelligence/jazzer/instrumentor/InvalidHookMocks.java
@@ -18,6 +18,7 @@ import com.code_intelligence.jazzer.api.HookType;
 import com.code_intelligence.jazzer.api.MethodHook;
 import java.lang.invoke.MethodHandle;
 
+@SuppressWarnings({"unused", "RedundantThrows"})
 class InvalidHookMocks {
   @MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.String", targetMethod = "equals")
   public static void incorrectHookIdType(
@@ -45,7 +46,14 @@ class InvalidHookMocks {
     return true;
   }
 
-  @MethodHook(type = HookType.REPLACE, targetClassName = "java.lang.StringBuilder",
+  @MethodHook(type = HookType.REPLACE, targetClassName = "java.lang.System", targetMethod = "gc",
+      targetMethodDescriptor = "()V")
+  public static Object
+  invalidReplaceVoidMethod(MethodHandle method, Object thisObject, Object[] arguments, int hookId) {
+    return null;
+  }
+
+  @MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.StringBuilder",
       targetMethod = "<init>", targetMethodDescriptor = "(Ljava/lang/String;)V")
   public static Object
   invalidReturnType(MethodHandle method, Object thisObject, Object[] arguments, int hookId)
@@ -58,4 +66,22 @@ class InvalidHookMocks {
   public static void
   primitiveReturnValueMustBeWrapped(MethodHandle method, String thisObject, Object[] arguments,
       int hookId, boolean returnValue) {}
+
+  @MethodHook(type = HookType.REPLACE, targetClassName = "java.lang.StringBuilder",
+      targetMethod = "<init>", targetMethodDescriptor = "(Ljava/lang/String;)V")
+  public static void
+  replaceOnInitWithoutReturnType(
+      MethodHandle method, Object thisObject, Object[] arguments, int hookId) throws Throwable {}
+
+  @MethodHook(type = HookType.REPLACE, targetClassName = "java.lang.StringBuilder",
+      targetMethod = "<init>", targetMethodDescriptor = "(Ljava/lang/String;)V")
+  public static Object
+  replaceOnInitWithIncompatibleType(
+      MethodHandle method, Object thisObject, Object[] arguments, int hookId) throws Throwable {
+    return new Object();
+  }
+
+  @MethodHook(type = HookType.AFTER, targetClassName = "java.lang.String", targetMethod = "equals")
+  public static void primitiveReturnType(MethodHandle method, String thisObject, Object[] arguments,
+      int hookId, boolean returnValue) {}
 }