core: add api for write tests using smali

jadx-core/build.gradle

 ext.jadxClasspath = 'clsp-data/android-4.3.jar'
 
 dependencies {
+    runtime files(jadxClasspath)
+
     compile files('lib/dx-1.8.jar')
     compile 'org.ow2.asm:asm:5.0.3'
-    runtime files(jadxClasspath)
+
+    testCompile 'org.smali:smali:2.0.3'
 }
 
 task packTests(type: Jar) {

jadx-core/src/test/java/jadx/api/InternalJadxTest.java

@@ -7,6 +7,7 @@ import jadx.core.dex.nodes.ClassNode;
 import jadx.core.dex.nodes.MethodNode;
 import jadx.core.dex.visitors.DepthTraversal;
 import jadx.core.dex.visitors.IDexTreeVisitor;
+import jadx.core.utils.exceptions.JadxException;
 import jadx.core.utils.files.FileUtils;
 
 import java.io.File;
@@ -30,21 +31,30 @@ public abstract class InternalJadxTest extends TestUtils {
 
 	protected boolean outputCFG = false;
 	protected boolean isFallback = false;
-	protected boolean deleteTmpJar = true;
+	protected boolean deleteTmpFiles = true;
 
 	protected String outDir = "test-out-tmp";
 
 	public ClassNode getClassNode(Class<?> clazz) {
-		JadxDecompiler d = new JadxDecompiler();
 		try {
-			d.loadFile(getJarForClass(clazz));
+			File jar = getJarForClass(clazz);
+			return getClassNodeFromFile(jar, clazz.getName());
 		} catch (Exception e) {
 			fail(e.getMessage());
 		}
-		String clsName = clazz.getName();
+		return null;
+	}
+
+	public ClassNode getClassNodeFromFile(File file, String clsName) {
+		JadxDecompiler d = new JadxDecompiler();
+		try {
+			d.loadFile(file);
+		} catch (JadxException e) {
+			fail(e.getMessage());
+		}
 		ClassNode cls = d.getRoot().searchClassByName(clsName);
 		assertNotNull("Class not found: " + clsName, cls);
-		assertEquals(cls.getFullName(), clazz.getName());
+		assertEquals(cls.getFullName(), clsName);
 
 		cls.load();
 		for (IDexTreeVisitor visitor : getPasses()) {
@@ -99,16 +109,26 @@ public abstract class InternalJadxTest extends TestUtils {
 		String path = cls.getPackage().getName().replace('.', '/');
 		List<File> list = getClassFilesWithInners(cls);
 
-		File temp = File.createTempFile("jadx-tmp-", System.nanoTime() + ".jar");
+		File temp = createTempFile(".jar");
 		JarOutputStream jo = new JarOutputStream(new FileOutputStream(temp));
 		for (File file : list) {
 			FileUtils.addFileToJar(jo, file, path + "/" + file.getName());
 		}
 		jo.close();
-		if (deleteTmpJar) {
+		return temp;
+	}
+
+	protected File createTempFile(String suffix) {
+		File temp = null;
+		try {
+			temp = File.createTempFile("jadx-tmp-", System.nanoTime() + suffix);
+			if (deleteTmpFiles) {
 				temp.deleteOnExit();
 			} else {
-			System.out.println("Temporary jar file path: " + temp.getAbsolutePath());
+				System.out.println("Temporary file path: " + temp.getAbsolutePath());
+			}
+		} catch (IOException e) {
+			fail(e.getMessage());
 		}
 		return temp;
 	}
@@ -135,7 +155,6 @@ public abstract class InternalJadxTest extends TestUtils {
 		return list;
 	}
 
-
 	// Use only for debug purpose
 	@Deprecated
 	protected void setOutputCFG() {
@@ -151,6 +170,6 @@ public abstract class InternalJadxTest extends TestUtils {
 	// Use only for debug purpose
 	@Deprecated
 	protected void notDeleteTmpJar() {
-		this.deleteTmpJar = false;
+		this.deleteTmpFiles = false;
 	}
 }

jadx-core/src/test/java/jadx/api/SmaliTest.java

+package jadx.api;
+
+import jadx.core.Consts;
+import jadx.core.dex.nodes.ClassNode;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.jf.smali.main;
+
+import static org.junit.Assert.fail;
+
+public class SmaliTest extends InternalJadxTest {
+
+	private static final String SMALI_TESTS_PROJECT = "jadx-core";
+	private static final String SMALI_TESTS_DIR = "src/test/smali";
+	private static final String SMALI_TESTS_EXT = ".smali";
+
+	protected ClassNode getClassNodeFromSmali(String clsName) {
+		File smaliFile = getSmaliFile(clsName);
+		File outDex = createTempFile(".dex");
+		compileSmali(smaliFile, outDex);
+		String fullClsName = Consts.DEFAULT_PACKAGE_NAME + "." + clsName;
+		return getClassNodeFromFile(outDex, fullClsName);
+	}
+
+	private File getSmaliFile(String clsName) {
+		File smaliFile = new File(SMALI_TESTS_DIR, clsName + SMALI_TESTS_EXT);
+		if (smaliFile.exists()) {
+			return smaliFile;
+		}
+		smaliFile = new File(SMALI_TESTS_PROJECT, smaliFile.getPath());
+		if (smaliFile.exists()) {
+			return smaliFile;
+		}
+		fail("Smali file not found: " + SMALI_TESTS_DIR + "/" + clsName + SMALI_TESTS_EXT);
+		return null;
+	}
+
+	public boolean compileSmali(File input, File output) {
+		List<String> args = new ArrayList<String>();
+		args.add(input.getAbsolutePath());
+
+		args.add("-o");
+		args.add(output.getAbsolutePath());
+
+		main.main(args.toArray(new String[args.size()]));
+		return true;
+	}
+}