1 files changed, 64 insertions, 0 deletions
diff --git a/src/test/java/com/code_intelligence/jazzer/instrumentor/PatchTestUtils.kt b/src/test/java/com/code_intelligence/jazzer/instrumentor/PatchTestUtils.kt
new file mode 100644
index 00000000..de2cc187
--- /dev/null
+++ b/src/test/java/com/code_intelligence/jazzer/instrumentor/PatchTestUtils.kt
@@ -0,0 +1,64 @@
+// Copyright 2021 Code Intelligence GmbH
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.code_intelligence.jazzer.instrumentor
+
+import java.io.FileOutputStream
+
+object PatchTestUtils {
+    @JvmStatic
+    fun classToBytecode(targetClass: Class<*>): ByteArray {
+        return ClassLoader
+            .getSystemClassLoader()
+            .getResourceAsStream("${targetClass.name.replace('.', '/')}.class")!!
+            .use {
+                it.readBytes()
+            }
+    }
+
+    @JvmStatic
+    fun bytecodeToClass(name: String, bytecode: ByteArray): Class<*> {
+        return BytecodeClassLoader(name, bytecode).loadClass(name)
+    }
+
+    @JvmStatic
+    fun dumpBytecode(outDir: String, name: String, originalBytecode: ByteArray) {
+        FileOutputStream("$outDir/$name.class").use { fos -> fos.write(originalBytecode) }
+    }
+
+    /**
+     * A ClassLoader that dynamically loads a single specified class from byte code and delegates all other class loads to
+     * its own ClassLoader.
+     */
+    class BytecodeClassLoader(val className: String, private val classBytecode: ByteArray) :
+        ClassLoader(BytecodeClassLoader::class.java.classLoader) {
+        override fun loadClass(name: String): Class<*> {
+            if (name != className) {
+                return super.loadClass(name)
+            }
+            return defineClass(className, classBytecode, 0, classBytecode.size)
+        }
+    }
+}
+
+fun assertSelfCheck(target: DynamicTestContract, shouldPass: Boolean = true) {
+    val results = target.selfCheck()
+    for ((test, passed) in results) {
+        if (shouldPass) {
+            assert(passed) { "$test should pass" }
+        } else {
+            assert(!passed) { "$test should not pass" }
+        }
+    }
+}