diff --git a/src/components/Main.jsx b/src/components/Main.jsx
index 97e2eb8..5e7ae58 100644
--- a/src/components/Main.jsx
+++ b/src/components/Main.jsx
@@ -4,6 +4,7 @@ import Tree from './Tree';
 import Navigation from './Navigation';
 import { builder as _builder_ } from '../services/Playground';
 import { AttributesProvider } from '../contexts/AttributesContext';
+import { IgnoredProviders } from '../contexts/IgnoredContext';
 import { BuilderConfigProvider } from '../contexts/BuilderConfigContext';
 
 function Main() {
@@ -27,7 +28,7 @@ function Main() {
           <Navigation onPrepareConfig={StartDrawing} />
           {/* <Button onClick={start}>Drzewo</Button> */}
           <br></br>
-          <div>{isReady ? <Tree options={builder} /> : <div>czekam na ciebie</div>}</div>
+          <div>{isReady ? <Tree options={builder} /> : <div>Deploy your set</div>}</div>
         </div>
       </AttributesProvider>
     </BuilderConfigProvider>
diff --git a/src/components/Navigation/DrawerRoll.jsx b/src/components/Navigation/DrawerRoll.jsx
index 9f91b3c..5d6b79e 100644
--- a/src/components/Navigation/DrawerRoll.jsx
+++ b/src/components/Navigation/DrawerRoll.jsx
@@ -7,22 +7,33 @@ import {
   DrawerBody,
   DrawerOverlay,
   DrawerContent,
+  OrderedList,
+  ListItem,
 } from '@chakra-ui/react';
 
-function DrawerRoll() {
+function DrawerRoll({ ignoredAttributes }) {
   const { isOpen, onOpen, onClose } = useDisclosure();
 
+  var collator = new Intl.Collator(undefined, { numeric: true, sensitivity: 'base' });
+
   return (
     <>
       <Button onClick={onOpen}>Open Drawer</Button>
       <Drawer placement="right" onClose={onClose} isOpen={isOpen}>
         <DrawerOverlay />
         <DrawerContent>
-          <DrawerHeader borderBottomWidth="1px">Basic Drawer</DrawerHeader>
+          <DrawerHeader borderBottomWidth="1px">Your all ignored attributes:</DrawerHeader>
           <DrawerBody>
+            <OrderedList>
+              {ignoredAttributes.sort(collator.compare).map(item => (
+                <ListItem>
+                  <p>{item}</p>
+                </ListItem>
+              ))}
+            </OrderedList>
+            {/* <p>Some contents...</p>
             <p>Some contents...</p>
-            <p>Some contents...</p>
-            <p>Some contents...</p>
+            <p>Some contents...</p> */}
           </DrawerBody>
         </DrawerContent>
       </Drawer>
@@ -31,3 +42,4 @@ function DrawerRoll() {
 }
 
 export default DrawerRoll;
+export const DrawerMemo = React.memo(DrawerRoll);
diff --git a/src/components/Navigation/index.jsx b/src/components/Navigation/index.jsx
index 37d6d0f..1693419 100644
--- a/src/components/Navigation/index.jsx
+++ b/src/components/Navigation/index.jsx
@@ -24,10 +24,11 @@ import { builder } from '../../services/Playground';
 import IgnoredAttributes from './IgnoredAttributes';
 import Builder from './Builder';
 import FormControlNumberInput from './FormControlNumberInput';
-import DrawerRoll from './DrawerRoll';
+import DrawerRoll, { DrawerMemo } from './DrawerRoll';
 import { useLoadingContext } from '../../contexts/LoadingContext';
 import { useAttributesContext } from '../../contexts/AttributesContext';
 import { useBuilderConfigContext } from '../../contexts/BuilderConfigContext';
+import { useIgnoredContext } from '../../contexts/IgnoredContext';
 
 /**
  * @typedef {import('../../utils/decision-tree.js').DecisionTreeBuilder} DecisionTreeBuilder
@@ -47,6 +48,7 @@ function Navigation({ onPrepareConfig }) {
   const [allClazz, setAllClasses] = useState([]);
   const [config, setConfig] = useState({});
   const { attributes: options, onAttributesChange } = useAttributesContext();
+  //const { attributes: ignoredAttributes, onIgnoredChange } = useIgnoredContext();
   const { isLoading } = useLoadingContext();
 
   function handleSelectDecision(value) {
@@ -57,6 +59,7 @@ function Navigation({ onPrepareConfig }) {
   function handleSelectIgnore(value) {
     console.log(value);
     setIgnoredAttributes(value);
+    //onIgnoredChange(value)
   }
   function handleSetMinItems(value) {
     //console.log(value);
@@ -229,7 +232,7 @@ function Navigation({ onPrepareConfig }) {
       </Collapse>
       <Stack spacing={2} direction={['row']} align="center" alignContent="center" justify="center">
         <Button onClick={onToggle}>{isOpen ? 'HIDE' : 'SHOW'}</Button>
-        <DrawerRoll />
+        <DrawerMemo ignoredAttributes={ignoredAttributes} />
       </Stack>
     </Box>
   );
diff --git a/src/components/Node/DataViewer/ReactTable.jsx b/src/components/Node/DataViewer/ReactTable.jsx
index 56aa96f..8ad6d45 100644
--- a/src/components/Node/DataViewer/ReactTable.jsx
+++ b/src/components/Node/DataViewer/ReactTable.jsx
@@ -23,9 +23,11 @@ function ReactTable({ set, cols }) {
   console.log(set, cols);
   const data = React.useMemo(() => set, []);
 
+  var collator = new Intl.Collator(undefined, { numeric: true, sensitivity: 'base' });
+
   function prepareHeaders(cols) {
     let tmp = [];
-    for (let item of cols.sort()) {
+    for (let item of cols.sort(collator.compare)) {
       tmp.push({
         Header: item,
         accessor: item,
diff --git a/src/components/Node/DataViewer/index.jsx b/src/components/Node/DataViewer/index.jsx
index fe68983..b6cca30 100644
--- a/src/components/Node/DataViewer/index.jsx
+++ b/src/components/Node/DataViewer/index.jsx
@@ -36,7 +36,7 @@ function DataViewer({ node, side }) {
           fontSize="14px"
           fontWeight="semibold"
         >
-          {sideSubTitle}
+          {sideSubTitle} - {node.nodeSet ? node.nodeSet.length : node.trainingSet2.length} elements.
         </Button>
       </Tooltip>
       <Modal
diff --git a/src/components/Node/Hide.jsx b/src/components/Node/Hide.jsx
new file mode 100644
index 0000000..ab0a03b
--- /dev/null
+++ b/src/components/Node/Hide.jsx
@@ -0,0 +1,36 @@
+import React, { useState } from 'react';
+import {
+  Box,
+  Button,
+  Modal,
+  ModalBody,
+  ModalCloseButton,
+  ModalContent,
+  ModalFooter,
+  ModalHeader,
+  ModalOverlay,
+  Tooltip,
+  useDisclosure,
+} from '@chakra-ui/react';
+import { IoMdArrowDropdownCircle, IoMdArrowDropupCircle } from 'react-icons/io';
+
+function DataViewer({ hide, onChange }) {
+  return (
+    <Button
+      mt={1}
+      px={2}
+      py={3}
+      onClick={() => onChange(!hide)}
+      colorScheme="teal"
+      variant="outline"
+      size="sm"
+      fontSize="14px"
+      //color="white"
+      mr={1}
+    >
+      {hide ? <IoMdArrowDropupCircle /> : <IoMdArrowDropdownCircle />}
+    </Button>
+  );
+}
+
+export default DataViewer;
diff --git a/src/components/Node/index.jsx b/src/components/Node/index.jsx
index 3be86b5..5530ac2 100644
--- a/src/components/Node/index.jsx
+++ b/src/components/Node/index.jsx
@@ -1,9 +1,9 @@
-import { Box, Spinner, useDisclosure } from '@chakra-ui/react';
+import { Box, Button, ButtonGroup, Hide, Spinner, Tooltip, useDisclosure } from '@chakra-ui/react';
 import React, { useEffect, useMemo, useState } from 'react';
 import { useBuilderConfigContext } from '../../contexts/BuilderConfigContext';
 import { executeAlgorithm, mostFrequentValue } from '../../utils/algorithm-executor';
 import DataViewer from './DataViewer';
-//import { addNode } from "./utils";
+import Hider from './Hide';
 
 import Joint from './Joint';
 import Leaf from './Leaf';
@@ -12,6 +12,7 @@ const Node = props => {
   //console.log(props.node);
   const { builderConfig } = useBuilderConfigContext();
   const [highlighted, setHighlighted] = useState(false);
+  const [hide, setHide] = useState(false);
   const [loading, setLoading] = useState(false);
   const [node, setNode] = useState(props.node || {});
   useEffect(() => setNode(props.node || {}), [props.node, setNode]);
@@ -115,6 +116,10 @@ const Node = props => {
       });
   };
 
+  const handleHide = value => {
+    setHide(value);
+  };
+
   if (loading) {
     return <Spinner size="xl" />;
   }
@@ -122,41 +127,48 @@ const Node = props => {
   return (
     <div className={`node ${highlighted ? 'highlight' : ''}`} onClick={onNodeClicked}>
       <Box d="flex" flexDirection="column" p="1" paddingLeft={3}>
-        <DataViewer node={node} side={side} />
-        {category ? (
-          <Leaf
-            category={category}
-            matchedCount={matchedCount}
-            notMatchedCount={notMatchedCount}
-            quality={quality}
-            requestLeafUnfold={unfoldLeaf}
-          />
-        ) : (
-          <Joint
-            attr2={attr2}
-            predicateName={predicateName}
-            pivot={pivot}
-            match={match}
-            notMatch={notMatch}
-            onChange={onChange}
-            requestFoldToLeaf={foldJointToLeaf}
-            nodeSet={nodeSet}
-            weight={weight}
-          >
-            <Node
-              node={match}
-              onChange={onChange}
-              requestChildChange={requestChildChangeIfMatchIs(true)}
-              side={true}
+        <Box d="flex" flexDirection="row">
+          <ButtonGroup size="sm" isAttached variant="outline">
+            <Hider hide={hide} onChange={handleHide} />
+            <DataViewer node={node} side={side} />
+          </ButtonGroup>
+        </Box>
+        <div style={{ display: hide ? 'none' : 'block' }}>
+          {category ? (
+            <Leaf
+              category={category}
+              matchedCount={matchedCount}
+              notMatchedCount={notMatchedCount}
+              quality={quality}
+              requestLeafUnfold={unfoldLeaf}
             />
-            <Node
-              node={notMatch}
+          ) : (
+            <Joint
+              attr2={attr2}
+              predicateName={predicateName}
+              pivot={pivot}
+              match={match}
+              notMatch={notMatch}
               onChange={onChange}
-              requestChildChange={requestChildChangeIfMatchIs(false)}
-              side={false}
-            />
-          </Joint>
-        )}
+              requestFoldToLeaf={foldJointToLeaf}
+              nodeSet={nodeSet}
+              weight={weight}
+            >
+              <Node
+                node={match}
+                onChange={onChange}
+                requestChildChange={requestChildChangeIfMatchIs(true)}
+                side={true}
+              />
+              <Node
+                node={notMatch}
+                onChange={onChange}
+                requestChildChange={requestChildChangeIfMatchIs(false)}
+                side={false}
+              />
+            </Joint>
+          )}
+        </div>
       </Box>
     </div>
   );
diff --git a/src/components/TestSetFileReader.jsx b/src/components/TestSetFileReader.jsx
new file mode 100644
index 0000000..27f3346
--- /dev/null
+++ b/src/components/TestSetFileReader.jsx
@@ -0,0 +1,49 @@
+import React, { useState } from 'react';
+import ReactFileReader from 'react-file-reader';
+import { Button } from '@chakra-ui/react';
+import { GrDocumentUpload } from 'react-icons/gr';
+
+import { readLocalFile } from '../utils/file-reader';
+import parseCsv from 'csv-parse/lib/sync';
+
+function TestSetFileReader(props) {
+  const handleFiles = async files => {
+    const file = await readLocalFile(files[0]);
+    //console.log(file);
+    const clean = file
+      .split('\n')
+      .map(line => {
+        return line.replace(/(^"|"$)|(")/g, '');
+        //return line.replace(/(^"|"$)/g, '');
+      })
+      .join('\n');
+
+    //console.log(clean);
+    const data = parseCsv(clean, {
+      columns: h => {
+        // let header = h.map((v, i) => v || `attr${i}`);
+        // allAttributes.push(header);
+        // return header;
+        if (props.isHeaders) return h.map((v, i) => v);
+        else return h.map((v, i) => `attr${i}`);
+      },
+      comment: '#',
+      skipEmptyLines: true,
+      delimiter: [',', '\t'],
+    });
+    //const data = parseCsv(file,{columns: true, comment: "#",skipEmptyLines: true,})
+    console.log(data);
+
+    props.onChange({ data });
+  };
+
+  return (
+    <div>
+      <ReactFileReader multipleFiles={false} fileTypes={['.csv']} handleFiles={handleFiles}>
+        <Button leftIcon={<GrDocumentUpload />}>Upload test set</Button>
+      </ReactFileReader>
+    </div>
+  );
+}
+
+export default TestSetFileReader;
diff --git a/src/components/Tree.jsx b/src/components/Tree.jsx
index 66da8e8..497c62f 100644
--- a/src/components/Tree.jsx
+++ b/src/components/Tree.jsx
@@ -1,10 +1,11 @@
 import React, { useCallback, useEffect, useMemo, useState } from 'react';
-import { Box, Spinner } from '@chakra-ui/react';
-// import { start } from '../services/Playground';
-// import { dt } from '../services/TSP';
+import { Box, Button, HStack, Spinner } from '@chakra-ui/react';
+import { GrTechnology, GrDocumentUpload } from 'react-icons/gr';
+import { GiWaterDivinerStick } from 'react-icons/gi';
 import Node from './Node';
 import { useLoadingContext } from '../contexts/LoadingContext';
 import { executeAlgorithm } from '../utils/algorithm-executor';
+import TestSetFileReader from './TestSetFileReader';
 
 /**
  * @typedef {import('../utils/decision-tree.js').DecisionTreeBuilder} DecisionTreeBuilder
@@ -27,6 +28,7 @@ const Tree = ({ options }) => {
   // }, [options]);
 
   const [root, setRoot] = useState(null);
+  const [testSet, setTestSet] = useState([]);
   const { isLoading, setIsLoading } = useLoadingContext();
 
   useEffect(() => {
@@ -57,14 +59,39 @@ const Tree = ({ options }) => {
 
   const requestChildChange = newRoot => setRoot(newRoot);
 
+  function handleGetTestSet({ data }) {
+    setTestSet(data);
+    console.log(data);
+  }
+  function predict(root) {
+    console.log('predict');
+  }
+
   return (
     <div id="tree">
-      <h1>Tree</h1>
-      <p>
-        <button onClick={() => logTree(root)}>Log tree</button>
-      </p>
+      <HStack spacing="24px">
+        <Box>
+          <p>
+            <Button leftIcon={<GrTechnology />} onClick={() => logTree(root)}>
+              Log tree
+            </Button>
+          </p>
+        </Box>
+        <Box>
+          <p>
+            <TestSetFileReader onChange={handleGetTestSet} isHeaders={false} />
+          </p>
+        </Box>
+        <Box>
+          <p>
+            <Button leftIcon={<GiWaterDivinerStick />} onClick={() => predict(root)}>
+              Predict
+            </Button>
+          </p>
+        </Box>
+      </HStack>
       {isLoading && <Spinner size="xl" />}
-      <h2>Nodes:</h2>
+      <h1>Tree nodes:</h1>
       <Box>
         {!root ? (
           <p>No tree to show</p>
diff --git a/src/contexts/IgnoredContext.jsx b/src/contexts/IgnoredContext.jsx
new file mode 100644
index 0000000..d91cafa
--- /dev/null
+++ b/src/contexts/IgnoredContext.jsx
@@ -0,0 +1,19 @@
+import React, { useContext, useState } from 'react';
+
+// @ts-ignore
+const IgnoredContext = React.createContext();
+
+export const IgnoredProviders = ({ children }) => {
+  const [attributes, setAttributes] = useState([]);
+
+  const onIgnoredChange = input => setAttributes(input.map(element => ({ value: element, name: element })));
+
+  return (
+    <IgnoredContext.Provider value={{ attributes, onIgnoredChange }}>{children}</IgnoredContext.Provider>
+  );
+};
+
+export const useIgnoredContext = () => {
+  const { attributes, onIgnoredChange } = useContext(IgnoredContext);
+  return { attributes, onIgnoredChange };
+};
diff --git a/src/services/playground2.js b/src/services/playground2.js
index ad56039..f3f3c22 100644
--- a/src/services/playground2.js
+++ b/src/services/playground2.js
@@ -1,3 +1,27 @@
+function predict(tree, item) {
+  var attr, value, predicate, pivot;
+
+  // Traversing tree from the root to leaf
+  while (true) {
+    if (tree.category) {
+      // only leafs contains predicted category
+      return tree.category;
+    }
+
+    attr = tree.attribute;
+    value = item[attr];
+
+    predicate = predicates[tree.predicate];
+    pivot = tree.pivot;
+
+    // move to one of subtrees
+    if (predicate(value, pivot)) {
+      tree = tree.match;
+    } else {
+      tree = tree.notMatch;
+    }
+  }
+}
 var predicates = {
   '==': function (a, b) {
     return a === b;