added tests for Fruit Shop

pom.xml

@@ -87,7 +87,7 @@
                                         <limit>
                                             <counter>LINE</counter>
                                             <value>COVEREDRATIO</value>
-                                            <minimum>0.8</minimum>
+                                            <minimum>0.8 </minimum>
                                         </limit>
                                     </limits>
                                 </rule>
@@ -97,7 +97,7 @@
                 </executions>
                 <configuration>
                     <excludes>
-                        <exclude>**/Main*</exclude>
+                        <exclude>**/FruitShop*</exclude>
                     </excludes>
                 </configuration>
             </plugin>

src/main/java/core/basesyntax/FruitShop.java

@@ -0,0 +1,53 @@
+package core.basesyntax;
+
+import core.basesyntax.handlers.BalanceOperationHandler;
+import core.basesyntax.handlers.PurchaseOperationHandler;
+import core.basesyntax.handlers.ReturnOperationHandler;
+import core.basesyntax.handlers.SupplyOperationHandler;
+import core.basesyntax.model.FruitTransaction;
+import core.basesyntax.services.DataProcessorService;
+import core.basesyntax.services.FileReaderService;
+import core.basesyntax.services.FileWriterService;
+import core.basesyntax.services.OperationProcessor;
+import core.basesyntax.services.ReportCreatorService;
+import core.basesyntax.services.impl.DataProcessorServiceImpl;
+import core.basesyntax.services.impl.FileReaderServiceImpl;
+import core.basesyntax.services.impl.FileWriterServiceImpl;
+import core.basesyntax.services.impl.OperationProcessorImpl;
+import core.basesyntax.services.impl.ReportCreatorServiceImpl;
+import core.basesyntax.strategy.OperationHandler;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class FruitShop {
+    private static final String INPUT_FILE_PATH = "src/main/java/resources/input.csv";
+    private static final String OUTPUT_FILE_PATH = "src/main/java/resources/output.csv";
+
+    public static void main(String[] args) {
+        FileReaderService fileReaderService = new FileReaderServiceImpl();
+        List<String> lines = fileReaderService.readFromFile(INPUT_FILE_PATH);
+        DataProcessorService dataProcessorService = new DataProcessorServiceImpl();
+
+        Map<FruitTransaction.Operation, OperationHandler> operationMap = getOperationOperationMap();
+
+        OperationProcessor operationService = new OperationProcessorImpl(operationMap);
+        List<FruitTransaction> fruitTransactionList = dataProcessorService.processInputData(lines);
+        operationService.manageTransactions(fruitTransactionList);
+
+        ReportCreatorService reportCreatorService = new ReportCreatorServiceImpl();
+        String report = reportCreatorService.createReport();
+
+        FileWriterService fileWriterService = new FileWriterServiceImpl();
+        fileWriterService.writeToFile(OUTPUT_FILE_PATH, report);
+    }
+
+    private static Map<FruitTransaction.Operation, OperationHandler> getOperationOperationMap() {
+        Map<FruitTransaction.Operation, OperationHandler> operationMap = new HashMap<>();
+        operationMap.put(FruitTransaction.Operation.BALANCE, new BalanceOperationHandler());
+        operationMap.put(FruitTransaction.Operation.SUPPLY, new SupplyOperationHandler());
+        operationMap.put(FruitTransaction.Operation.PURCHASE, new PurchaseOperationHandler());
+        operationMap.put(FruitTransaction.Operation.RETURN, new ReturnOperationHandler());
+        return operationMap;
+    }
+}

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

@@ -0,0 +1,8 @@
+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/excteption/InvalidDataException.java

@@ -0,0 +1,7 @@
+package core.basesyntax.excteption;
+
+public class InvalidDataException extends RuntimeException {
+    public InvalidDataException(String message) {
+        super(message);
+    }
+}

src/main/java/core/basesyntax/handlers/BalanceOperationHandler.java

@@ -0,0 +1,18 @@
+package core.basesyntax.handlers;
+
+import core.basesyntax.db.Storage;
+import core.basesyntax.excteption.InvalidDataException;
+import core.basesyntax.model.FruitTransaction;
+import core.basesyntax.strategy.OperationHandler;
+
+public class BalanceOperationHandler implements OperationHandler {
+    @Override
+    public void calculateOperation(FruitTransaction transaction) {
+        if (transaction.getQuantity() < 0) {
+            throw new InvalidDataException("Negative quantity");
+        } else if (transaction.getFruit() == null || transaction.getOperation() == null) {
+            throw new NullPointerException("Invalid transaction or fruit type");
+        }
+        Storage.STORAGE.put(transaction.getFruit(), transaction.getQuantity());
+    }
+}

src/main/java/core/basesyntax/handlers/PurchaseOperationHandler.java

@@ -0,0 +1,25 @@
+package core.basesyntax.handlers;
+
+import core.basesyntax.db.Storage;
+import core.basesyntax.excteption.InvalidDataException;
+import core.basesyntax.model.FruitTransaction;
+import core.basesyntax.strategy.OperationHandler;
+
+public class PurchaseOperationHandler implements OperationHandler {
+    @Override
+    public void calculateOperation(FruitTransaction transaction) {
+
+        if (transaction.getQuantity() < 0) {
+            throw new InvalidDataException("Negative quantity");
+        } else if (transaction.getFruit() == null) {
+            throw new NullPointerException("Invalid fruit type");
+        }
+        int currentAmount = Storage.STORAGE.get(transaction.getFruit());
+        int quantity = transaction.getQuantity();
+        int purchaseResult = currentAmount - quantity;
+        if (purchaseResult < 0) {
+            throw new InvalidDataException("Not enough fruits in storage");
+        }
+        Storage.STORAGE.put(transaction.getFruit(), purchaseResult);
+    }
+}

src/main/java/core/basesyntax/handlers/ReturnOperationHandler.java

@@ -0,0 +1,21 @@
+package core.basesyntax.handlers;
+
+import core.basesyntax.db.Storage;
+import core.basesyntax.excteption.InvalidDataException;
+import core.basesyntax.model.FruitTransaction;
+import core.basesyntax.strategy.OperationHandler;
+
+public class ReturnOperationHandler implements OperationHandler {
+    @Override
+    public void calculateOperation(FruitTransaction transaction) {
+        if (transaction.getQuantity() < 0) {
+            throw new InvalidDataException("Negative quantity");
+        } else if (transaction.getFruit() == null) {
+            throw new NullPointerException("Invalid fruit type");
+        }
+        int currentAmount = Storage.STORAGE.get(transaction.getFruit());
+        int quantity = transaction.getQuantity();
+        int returnResult = currentAmount + quantity;
+        Storage.STORAGE.put(transaction.getFruit(), returnResult);
+    }
+}

src/main/java/core/basesyntax/handlers/SupplyOperationHandler.java

@@ -0,0 +1,21 @@
+package core.basesyntax.handlers;
+
+import core.basesyntax.db.Storage;
+import core.basesyntax.excteption.InvalidDataException;
+import core.basesyntax.model.FruitTransaction;
+import core.basesyntax.strategy.OperationHandler;
+
+public class SupplyOperationHandler implements OperationHandler {
+    @Override
+    public void calculateOperation(FruitTransaction transaction) {
+        if (transaction.getQuantity() < 0) {
+            throw new InvalidDataException("Negative quantity");
+        } else if (transaction.getFruit() == null || transaction.getOperation() == null) {
+            throw new NullPointerException("Invalid transaction or fruit type");
+        }
+        int currentAmount = Storage.STORAGE.get(transaction.getFruit());
+        int quantity = transaction.getQuantity();
+        int supplyResult = currentAmount + quantity;
+        Storage.STORAGE.put(transaction.getFruit(), supplyResult);
+    }
+}

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

@@ -0,0 +1,83 @@
+package core.basesyntax.model;
+
+import java.util.Arrays;
+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;
+    }
+
+    public void setOperation(Operation operation) {
+        this.operation = operation;
+    }
+
+    public String getFruit() {
+        return fruit;
+    }
+
+    public void setFruit(String fruit) {
+        this.fruit = fruit;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        FruitTransaction that = (FruitTransaction) o;
+        return quantity == that.quantity
+                && operation == that.operation
+                && Objects.equals(fruit, that.fruit);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(operation, fruit, quantity);
+    }
+
+    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;
+        }
+
+        public static Operation getOperationByCode(String code) {
+            return Arrays.stream(Operation.values())
+                    .filter(o -> o.getCode().equals(code))
+                    .findAny()
+                    .orElseThrow(() -> new RuntimeException("No such operation"));
+        }
+    }
+}

src/main/java/core/basesyntax/services/DataProcessorService.java

@@ -0,0 +1,8 @@
+package core.basesyntax.services;
+
+import core.basesyntax.model.FruitTransaction;
+import java.util.List;
+
+public interface DataProcessorService {
+    List<FruitTransaction> processInputData(List<String> dataFromFile);
+}

src/main/java/core/basesyntax/services/FileReaderService.java

@@ -0,0 +1,7 @@
+package core.basesyntax.services;
+
+import java.util.List;
+
+public interface FileReaderService {
+    List<String> readFromFile(String fileName);
+}

src/main/java/core/basesyntax/services/FileWriterService.java

@@ -0,0 +1,5 @@
+package core.basesyntax.services;
+
+public interface FileWriterService {
+    void writeToFile(String fileName, String report);
+}

src/main/java/core/basesyntax/services/OperationProcessor.java

@@ -0,0 +1,8 @@
+package core.basesyntax.services;
+
+import core.basesyntax.model.FruitTransaction;
+import java.util.List;
+
+public interface OperationProcessor {
+    void manageTransactions(List<FruitTransaction> transactions);
+}

src/main/java/core/basesyntax/services/ReportCreatorService.java

@@ -0,0 +1,5 @@
+package core.basesyntax.services;
+
+public interface ReportCreatorService {
+    String createReport();
+}

src/main/java/core/basesyntax/services/impl/DataProcessorServiceImpl.java

@@ -0,0 +1,32 @@
+package core.basesyntax.services.impl;
+
+import core.basesyntax.excteption.InvalidDataException;
+import core.basesyntax.model.FruitTransaction;
+import core.basesyntax.services.DataProcessorService;
+import java.util.List;
+
+public class DataProcessorServiceImpl implements DataProcessorService {
+    private static final String SPLIT_DELIMITER = ",";
+    private static final int OPERATION_TYPE_INDEX = 0;
+    private static final int FRUIT_TYPE_INDEX = 1;
+    private static final int FRUIT_QUANTITY_INDEX = 2;
+
+    @Override
+    public List<FruitTransaction> processInputData(List<String> dataFromFile) {
+        return dataFromFile.stream()
+                .map(this::getFruitTransaction)
+                .toList();
+    }
+
+    private FruitTransaction getFruitTransaction(String data) {
+        String[] processedData = data.split(SPLIT_DELIMITER);
+        FruitTransaction.Operation operation = FruitTransaction.Operation
+                .getOperationByCode(processedData[OPERATION_TYPE_INDEX]);
+        String fruitType = processedData[FRUIT_TYPE_INDEX];
+        int fruitQuantity = Integer.parseInt(processedData[FRUIT_QUANTITY_INDEX]);
+        if (fruitQuantity < 0) {
+            throw new InvalidDataException("Invalid Quantity,fruit quantity is: " + fruitQuantity);
+        }
+        return new FruitTransaction(operation, fruitType, fruitQuantity);
+    }
+}

src/main/java/core/basesyntax/services/impl/FileReaderServiceImpl.java

@@ -0,0 +1,25 @@
+package core.basesyntax.services.impl;
+
+import core.basesyntax.services.FileReaderService;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+
+public class FileReaderServiceImpl implements FileReaderService {
+    private static final int SKIP_LINE = 1;
+
+    @Override
+    public List<String> readFromFile(String fileName) {
+        List<String> linesFromFile = new ArrayList<>();
+        Path path = Paths.get(fileName);
+        try {
+            Files.lines(path).skip(SKIP_LINE).forEach(linesFromFile::add);
+        } catch (IOException e) {
+            throw new RuntimeException("Can't read data from file : " + fileName);
+        }
+        return linesFromFile;
+    }
+}

src/main/java/core/basesyntax/services/impl/FileWriterServiceImpl.java

@@ -0,0 +1,17 @@
+package core.basesyntax.services.impl;
+
+import core.basesyntax.services.FileWriterService;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+public class FileWriterServiceImpl implements FileWriterService {
+    @Override
+    public void writeToFile(String filePath, String report) {
+        try {
+            Files.writeString(Paths.get(filePath), report);
+        } catch (IOException e) {
+            throw new RuntimeException("Can't find file by path" + filePath);
+        }
+    }
+}