added test for service

pom.xml

@@ -119,4 +119,4 @@
             </plugins>
         </pluginManagement>
     </build>
-</project>
+</project>

src/main/java/core/basesyntax/Main.java

@@ -0,0 +1,55 @@
+package core.basesyntax;
+
+import core.basesyntax.dao.FruitDao;
+import core.basesyntax.dao.FruitDaoImp;
+import core.basesyntax.model.FruitTransaction;
+import core.basesyntax.model.Operation;
+import core.basesyntax.service.Parser;
+import core.basesyntax.service.Producer;
+import core.basesyntax.service.Reader;
+import core.basesyntax.service.Writer;
+import core.basesyntax.service.impl.FruitTransactionParser;
+import core.basesyntax.service.impl.ProduceMapReportService;
+import core.basesyntax.service.impl.ReadFromCsvService;
+import core.basesyntax.service.impl.WriteCsvService;
+import core.basesyntax.strategy.OperationStrategy;
+import core.basesyntax.strategy.OperationStrategyImp;
+import core.basesyntax.strategy.handler.BalanceHandler;
+import core.basesyntax.strategy.handler.OperationHandler;
+import core.basesyntax.strategy.handler.PurchaseHandler;
+import core.basesyntax.strategy.handler.ReturnHandler;
+import core.basesyntax.strategy.handler.SupplyHandler;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class Main {
+
+    private static final String FILE_FROM = "src/main/resources/csvFile.csv";
+    private static final String FILE_TO = "src/main/resources/Report.csv";
+
+    public static void main(String[] args) {
+        Map<Operation, OperationHandler> operationHandlerMap = new HashMap<>();
+        Reader reader = new ReadFromCsvService();
+        FruitDao fruitDao = new FruitDaoImp();
+        initializeOperationHandlers(operationHandlerMap, fruitDao);
+        OperationStrategy operationStrategy = new OperationStrategyImp(operationHandlerMap);
+        List<String> fileData = reader.read(FILE_FROM);
+        List<FruitTransaction> fruitTransactions;
+        Parser parser = new FruitTransactionParser();
+        fruitTransactions = parser.parse(fileData);
+        fruitDao.add(fruitTransactions);
+        operationStrategy.getHandle(fruitTransactions);
+        Writer writer = new WriteCsvService();
+        Producer producer = new ProduceMapReportService();
+        writer.write(producer.produceReport(fruitDao.getStorage()), FILE_TO);
+    }
+
+    private static void initializeOperationHandlers(Map<Operation,
+            OperationHandler> handlerMap, FruitDao fruitDao) {
+        handlerMap.put(Operation.BALANCE, new BalanceHandler(fruitDao));
+        handlerMap.put(Operation.PURCHASE, new PurchaseHandler(fruitDao));
+        handlerMap.put(Operation.RETURN, new ReturnHandler(fruitDao));
+        handlerMap.put(Operation.SUPPLY, new SupplyHandler(fruitDao));
+    }
+}

src/main/java/core/basesyntax/dao/FruitDao.java

@@ -0,0 +1,15 @@
+package core.basesyntax.dao;
+
+import core.basesyntax.model.FruitTransaction;
+import java.util.List;
+import java.util.Map;
+
+public interface FruitDao {
+    Map<String, Integer> getStorage();
+
+    Integer get(String key);
+
+    void add(String type, Integer quantity);
+
+    void add(List<FruitTransaction> list);
+}

src/main/java/core/basesyntax/dao/FruitDaoImp.java

@@ -0,0 +1,31 @@
+package core.basesyntax.dao;
+
+import static core.basesyntax.db.Storage.STORAGE;
+
+import core.basesyntax.model.FruitTransaction;
+import java.util.List;
+import java.util.Map;
+
+public class FruitDaoImp implements FruitDao {
+    public Map<String, Integer> getStorage() {
+        return STORAGE;
+    }
+
+    public void add(String type, Integer quantity) {
+        STORAGE.put(type, quantity);
+    }
+
+    @Override
+    public void add(List<FruitTransaction> list) {
+        for (FruitTransaction item : list) {
+            STORAGE.put(item.getFruit(), 0);
+        }
+    }
+
+    public Integer get(String key) {
+        if (STORAGE.get(key) == null) {
+            throw new IllegalArgumentException("Can't get non-existent key your key is " + key);
+        }
+        return STORAGE.get(key);
+    }
+}

src/main/java/core/basesyntax/db/Storage.java

@@ -0,0 +1,9 @@
+package core.basesyntax.db;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Storage {
+    public static final Map<String, Integer> STORAGE = new HashMap<>();
+
+}

src/main/java/core/basesyntax/model/FruitTransaction.java

@@ -0,0 +1,55 @@
+package core.basesyntax.model;
+
+import java.util.Objects;
+
+public class FruitTransaction {
+    private Operation operation;
+    private String fruit;
+    private int quantity;
+
+    public FruitTransaction(Operation operation, String fruit, int quantity) {
+        this.operation = operation;
+        this.fruit = fruit;
+        this.quantity = quantity;
+    }
+
+    public Operation getOperation() {
+        return operation;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        FruitTransaction that = (FruitTransaction) o;
+
+        if (quantity != that.quantity) {
+            return false;
+        }
+        if (operation != that.operation) {
+            return false;
+        }
+        return Objects.equals(fruit, that.fruit);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = operation.hashCode();
+        result = 31 * result + (fruit != null ? fruit.hashCode() : 0);
+        result = 31 * result + quantity;
+        return result;
+    }
+
+    public String getFruit() {
+        return fruit;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+}

src/main/java/core/basesyntax/model/Operation.java

@@ -0,0 +1,18 @@
+package core.basesyntax.model;
+
+public enum Operation {
+    BALANCE("b"),
+    SUPPLY("s"),
+    PURCHASE("p"),
+    RETURN("r");
+
+    private String code;
+
+    Operation(String code) {
+        this.code = code;
+    }
+
+    public String getCode() {
+        return code;
+    }
+}

src/main/java/core/basesyntax/service/Parser.java

@@ -0,0 +1,8 @@
+package core.basesyntax.service;
+
+import core.basesyntax.model.FruitTransaction;
+import java.util.List;
+
+public interface Parser {
+    List<FruitTransaction> parse(List<String> fileData);
+}

src/main/java/core/basesyntax/service/Producer.java

@@ -0,0 +1,7 @@
+package core.basesyntax.service;
+
+import java.util.Map;
+
+public interface Producer {
+    String produceReport(Map<String, Integer> map);
+}

src/main/java/core/basesyntax/service/Reader.java

@@ -0,0 +1,7 @@
+package core.basesyntax.service;
+
+import java.util.List;
+
+public interface Reader {
+    List<String> read(String path);
+}

src/main/java/core/basesyntax/service/Writer.java

@@ -0,0 +1,5 @@
+package core.basesyntax.service;
+
+public interface Writer {
+    boolean write(String content, String path);
+}

src/main/java/core/basesyntax/service/impl/FruitTransactionParser.java

@@ -0,0 +1,36 @@
+package core.basesyntax.service.impl;
+
+import core.basesyntax.model.FruitTransaction;
+import core.basesyntax.model.Operation;
+import core.basesyntax.service.Parser;
+import java.util.ArrayList;
+import java.util.List;
+
+public class FruitTransactionParser implements Parser {
+    private static final String SPLITER = ",";
+    private static final int INDEX_OF_OPERATION = 0;
+    private static final int INDEX_OF_FRUIT_NAME = 1;
+    private static final int INDEX_OF_QUANTITY = 2;
+
+    @Override
+    public List<FruitTransaction> parse(List<String> fileData) {
+        if (fileData == null) {
+            throw new IllegalArgumentException("Can't parse this list because list is null");
+        }
+        List<FruitTransaction> fruits = new ArrayList<>();
+        for (String line : fileData) {
+            String[] splitedLine = line.split(SPLITER);
+            if (splitedLine.length > 3 || splitedLine.length <= 1) {
+                throw new IllegalArgumentException("Can't parse this list");
+            }
+            for (Operation operation : Operation.values()) {
+                if (operation.getCode().equalsIgnoreCase(splitedLine[INDEX_OF_OPERATION])) {
+                    fruits.add(new FruitTransaction(operation,
+                            splitedLine[INDEX_OF_FRUIT_NAME],
+                            Integer.parseInt(splitedLine[INDEX_OF_QUANTITY])));
+                }
+            }
+        }
+        return fruits;
+    }
+}

src/main/java/core/basesyntax/service/impl/ProduceMapReportService.java

@@ -0,0 +1,32 @@
+package core.basesyntax.service.impl;
+
+import core.basesyntax.service.Producer;
+import java.util.Map;
+
+public class ProduceMapReportService implements Producer {
+    private static final String NEW_LINE = System.lineSeparator();
+    private static final String COMA = ",";
+
+    @Override
+    public String produceReport(Map<String, Integer> map) {
+        if (map == null) {
+            throw new IllegalArgumentException("can't produce this map because map is null");
+        }
+        StringBuilder report = new StringBuilder();
+        int size = map.size();
+        int index = 0;
+        for (Map.Entry<String, Integer> entry : map.entrySet()) {
+            if (entry.getValue() < 0) {
+                throw new IllegalArgumentException("can't produce this map integer value below 0");
+            }
+            report.append(entry.getKey())
+                    .append(COMA)
+                    .append(entry.getValue());
+            if (index < size - 1) {
+                report.append(NEW_LINE);
+            }
+            index++;
+        }
+        return report.toString();
+    }
+}

src/main/java/core/basesyntax/service/impl/ReadFromCsvService.java

@@ -0,0 +1,28 @@
+package core.basesyntax.service.impl;
+
+import core.basesyntax.service.Reader;
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ReadFromCsvService implements Reader {
+    private static final int INDEX_OF_TITLE = 0;
+    private static final String CANT_READ_EXCEPTION_MESSAGE = "can't read file";
+
+    @Override
+    public List<String> read(String path) {
+        List<String> data = new ArrayList<>();
+        try (BufferedReader bufferedReader = new BufferedReader(new FileReader(path))) {
+            String line;
+            while ((line = bufferedReader.readLine()) != null) {
+                data.add(line.trim());
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(CANT_READ_EXCEPTION_MESSAGE + path,e);
+        }
+        data.remove(INDEX_OF_TITLE);
+        return data;
+    }
+}

src/main/java/core/basesyntax/service/impl/WriteCsvService.java

@@ -0,0 +1,29 @@
+package core.basesyntax.service.impl;
+
+import core.basesyntax.service.Writer;
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+
+public class WriteCsvService implements Writer {
+    private static final String TITLE_TEXT = "fruit,quantity";
+    private static final String RUNTIME_EXCEPTION_MESSAGE = "Can't write file ";
+
+    @Override
+    public boolean write(String content, String path) {
+        if (!path.endsWith(".csv")) {
+            throw new IllegalArgumentException("Csv writer write only csv file");
+        }
+        try {
+            BufferedWriter bufferedWriter = new BufferedWriter(
+                    new FileWriter(path));
+            bufferedWriter.write(TITLE_TEXT);
+            bufferedWriter.newLine();
+            bufferedWriter.write(content);
+            bufferedWriter.close();
+        } catch (IOException e) {
+            throw new RuntimeException(RUNTIME_EXCEPTION_MESSAGE + path, e);
+        }
+        return true;
+    }
+}

src/main/java/core/basesyntax/strategy/OperationStrategy.java

@@ -0,0 +1,9 @@
+package core.basesyntax.strategy;
+
+import core.basesyntax.model.FruitTransaction;
+import java.util.List;
+
+public interface OperationStrategy {
+    boolean getHandle(List<FruitTransaction> fruitTransactions);
+
+}