- more robust torch unit test. Will search for root directory

- Added better explanation

modules/io/src/test/java/deepboof/io/torch7/TestConvertTorchToBoofForward.java

@@ -25,6 +25,7 @@
 import deepboof.graph.ForwardSequence;
 import deepboof.impl.forward.standard.*;
 import deepboof.io.torch7.struct.TorchObject;
+import deepboof.misc.TensorOps;
 import org.junit.Test;
 
 import java.io.File;
@@ -34,16 +35,14 @@
 import static deepboof.io.torch7.ConvertTorchToBoofForward.convert;
 import static deepboof.misc.TensorOps.TH;
 import static deepboof.misc.TensorOps.WI;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
+import static org.junit.Assert.*;
 
 /**
  * @author Peter Abeles
  */
 public class TestConvertTorchToBoofForward {
 
-	File pathToData = new File("../io/src/test/torch7/data");
+	File pathToData = new File(TensorOps.pathToRoot(),"modules/io/src/test/torch7/data");
 
 	@Test
 	public void relu() {
@@ -119,7 +118,11 @@ public void spatialDropout() {
 	private void checkFunction(String directory , Class functionClass ) {
 		File pathToOp = new File(pathToData,directory);
 		if( !pathToOp.exists() ) {
-			fail("Have you generated data using torch?");
+			System.err.println("Can't find torch generated test data.  To generate data run the following Linux shell script");
+			System.err.println();
+			System.err.println("DeepBoof/modules/io/src/test/torch7/generate_all.sh");
+			System.err.println();
+			fail("Missing torch data for "+directory);
 		}
 
 		int count = 0;

modules/main/src/main/java/deepboof/misc/TensorOps.java

@@ -21,6 +21,7 @@
 import deepboof.Tensor;
 import deepboof.tensors.Tensor_F64;
 
+import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -237,4 +238,38 @@ public static int outerLength(int[] shape , int startDimen ) {
 		}
 		return D;
 	}
+
+	public static File pathToRoot() {
+		File active = new File(".").getAbsoluteFile();
+
+		while( active != null ) {
+			boolean foundModules = false;
+			boolean foundExamples = false;
+			boolean foundSettings = false;
+
+			File[] children = active.listFiles();
+			if( children == null )
+				break;
+
+			for( File d : children ) {
+				if( d.isDirectory() && d.getName().endsWith("modules")) {
+					foundModules = true;
+				}
+				if( d.isDirectory() && d.getName().endsWith("examples")) {
+					foundExamples = true;
+				}
+				if( d.isFile() && d.getName().equals("settings.gradle")) {
+					foundSettings = true;
+				}
+			}
+
+			if( foundModules && foundExamples && foundSettings ) {
+				return active;
+			} else {
+				active = active.getParentFile();
+			}
+		}
+		throw new RuntimeException("Cant find the project root directory");
+
+	}
 }