src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/book/validator/BookValidatorTest.java

@@ -0,0 +1,352 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.validator;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookDetails;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookSalesInfo;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class BookValidatorTest {
+
+    @Test
+    @DisplayName("Should validate book with valid data")
+    void testValidateValidCustomer() {
+        LocalDate date = LocalDate.of(2026, 3, 24);
+        BookInfo validBook = new BookInfo("0000000000000","La vie de Maxime", "Marvin Aubert", "Kioon", date);
+
+        assertDoesNotThrow(() -> BookValidator.validate(validBook));
+    }
+
+    @Nested
+    @DisplayName("ISBN validation tests")
+    class ISBNValidationTests {
+
+        @Test
+        @DisplayName("Should throw exception when isbn is blank")
+        void testValidateBlankTitle() {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithBlankTitle = new BookInfo("", "La vie de Maxime", "Marvin Aubert", "Kioon", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithBlankTitle)
+            );
+
+            assertEquals(BookValidator.ISBN_CANNOT_BE_BLANK, exception.getMessage());
+        }
+
+        @ParameterizedTest
+        @ValueSource(strings = {" ", "  ", "\t", "\n"})
+        @DisplayName("Should throw exception when title contains only whitespace")
+        void testValidateWhitespaceISBN(String whitespace) {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithWhitespaceTitle = new BookInfo(whitespace, "La vie de Maxime", "Marvin Aubert", "Kioon", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithWhitespaceTitle)
+            );
+
+            assertEquals(BookValidator.TITLE_CANNOT_BE_BLANK, exception.getMessage());
+        }
+
+        @ParameterizedTest
+        @ValueSource(strings = {"00000", "0000000000", "0000000000000000"})
+        @DisplayName("Should throw exception when isbn contains only thriteen character")
+        void testValidateThirteenCharacterISBN(String number) {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithWhitespaceTitle = new BookInfo(number, "La vie de Maxime", "Marvin Aubert", "Kioon", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithWhitespaceTitle)
+            );
+
+            assertEquals(BookValidator.ISBN_CANNOT_CONTAIN_MORE_OR_LESS_THIRTEEN_CHARACTER, exception.getMessage());
+        }
+    }
+
+    @Nested
+    @DisplayName("Title validation tests")
+    class TitleValidationTests {
+
+        @Test
+        @DisplayName("Should throw exception when title is blank")
+        void testValidateBlankTitle() {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithBlankTitle = new BookInfo("0000000000000","", "Marvin Aubert", "Kioon", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithBlankTitle)
+            );
+
+            assertEquals(BookValidator.TITLE_CANNOT_BE_BLANK, exception.getMessage());
+        }
+
+        @ParameterizedTest
+        @ValueSource(strings = {" ", "  ", "\t", "\n"})
+        @DisplayName("Should throw exception when title contains only whitespace")
+        void testValidateWhitespaceFirstName(String whitespace) {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithWhitespaceTitle = new BookInfo("0000000000000",whitespace, "Marvin Aubert", "Kioon", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithWhitespaceTitle)
+            );
+
+            assertEquals(BookValidator.TITLE_CANNOT_BE_BLANK, exception.getMessage());
+        }
+    }
+
+    @Nested
+    @DisplayName("author validation tests")
+    class AuthorValidationTests {
+
+        @Test
+        @DisplayName("Should throw exception when author is blank")
+        void testValidateBlankAuthor() {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithBlankAuthor = new BookInfo("0000000000000","La vie de Maxime", "", "Kioon", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithBlankAuthor)
+            );
+
+            assertEquals(BookValidator.AUTHOR_CANNOT_BE_BLANK, exception.getMessage());
+        }
+
+        @ParameterizedTest
+        @ValueSource(strings = {" ", "  ", "\t", "\n"})
+        @DisplayName("Should throw exception when author contains only whitespace")
+        void testValidateWhitespaceAuthor(String whitespace) {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithWhitespaceAuthor = new BookInfo("0000000000000","La vie de Maxime", whitespace, "Kioon", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithWhitespaceAuthor)
+            );
+
+            assertEquals(BookValidator.AUTHOR_CANNOT_BE_BLANK, exception.getMessage());
+        }
+    }
+
+    @Nested
+    @DisplayName("editor validation tests")
+    class EditorValidationTests {
+
+        @Test
+        @DisplayName("Should throw exception when editor is blank")
+        void testValidateBlankEditor() {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithBlankEditor = new BookInfo("0000000000000","La vie de Maxime", "Marvin Aubert", "", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithBlankEditor)
+            );
+
+            assertEquals(BookValidator.EDITOR_CANNOT_BE_BLANK, exception.getMessage());
+        }
+
+        @ParameterizedTest
+        @ValueSource(strings = {" ", "  ", "\t", "\n"})
+        @DisplayName("Should throw exception when editor contains only whitespace")
+        void testValidateWhitespaceEditor(String whitespace) {
+            LocalDate date = LocalDate.of(2026, 3, 24);
+            BookInfo bookWithWhitespaceEditor = new BookInfo("0000000000000","La vie de Maxime", "Marvin Aubert", whitespace, date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithWhitespaceEditor)
+            );
+
+            assertEquals(BookValidator.EDITOR_CANNOT_BE_BLANK, exception.getMessage());
+        }
+    }
+
+    @Nested
+    @DisplayName("date validation tests")
+    class DateValidationTests {
+
+        @Test
+        @DisplayName("Should throw exception when date is after the actual date")
+        void testValidateFuturDate() {
+            LocalDate date = LocalDate.of(2026, 5, 24);
+            BookInfo bookWithFuturDate = new BookInfo("0000000000000","La vie de Maxime", "Marvin Aubert", "Kioon", date);
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithFuturDate)
+            );
+
+            assertEquals(BookValidator.DATE_CANNOT_BE_AFTER_TODAY, exception.getMessage());
+        }
+    }
+
+    @Nested
+    @DisplayName("price validation tests")
+    class PriceValidationTests {
+
+        @ParameterizedTest
+        @ValueSource(doubles = {-3, -15, 0})
+        @DisplayName("Should throw exception when price is negative or equal to zero")
+        void testValidateNegativePrice(double invalidprice) {
+            BookSalesInfo bookWithNegativePrice = BookSalesInfo.builder()
+                    .price(invalidprice)
+                    .stock(10)
+                    .build();
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithNegativePrice)
+            );
+
+            assertEquals(BookValidator.PRICE_CANNOT_BE_NEGATIVE_OR_EQUAL_ZERO, exception.getMessage());
+        }
+    }
+
+    @Nested
+    @DisplayName("stock validation tests")
+    class StockValidationTests {
+
+        @Test
+        @DisplayName("Should throw exception when stock is negative")
+        void testValidateNegativeSTock() {
+            BookSalesInfo bookWithNegativeStock = BookSalesInfo.builder()
+                    .price(3)
+                    .stock(-3)
+                    .build();
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithNegativeStock)
+            );
+
+            assertEquals(BookValidator.STOCK_CANNOT_BE_NEGATIVE, exception.getMessage());
+        }
+    }
+
+    @Nested
+    @DisplayName("categories validation tests")
+    class CategoriesValidationTests {
+
+        @Test
+        @DisplayName("Should throw exception when categories is empty")
+        void testValidateBlankCategories() {
+            ArrayList<String> categories = new ArrayList<>();
+            String description = "C'était un brave partit trop tôt";
+            String language = "Français";
+            BookDetails bookWithEmptyCategories = BookDetails.builder()
+                    .categories(categories)
+                    .description(description)
+                    .language(language)
+                    .build();
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithEmptyCategories)
+            );
+
+            assertEquals(BookValidator.Categories_CANNOT_BE_EMPTY, exception.getMessage());
+        }
+
+        @ParameterizedTest
+        @MethodSource("provideLists")
+        @DisplayName("Should throw exception when categories contains an whitespace")
+        void testValidateWhitespaceCategories(ArrayList<String> invalidlist) {
+            String description = "C'était un brave partit trop tôt";
+            String language = "Français";
+            BookDetails bookWithWhitespaceCategories = BookDetails.builder()
+                    .categories(invalidlist)
+                    .description(description)
+                    .language(language)
+                    .build();
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithWhitespaceCategories)
+            );
+
+            assertEquals(BookValidator.Categories_CANNOT_CONTAIN_BLANK, exception.getMessage());
+        }
+
+        static Stream<ArrayList<String>> provideLists() {
+            return Stream.of(
+                    new ArrayList<String>(java.util.List.of("")),
+                    new ArrayList<String>(java.util.List.of(" ")),
+                    new ArrayList<String>(java.util.List.of("  ")),
+                    new ArrayList<String>(java.util.List.of("\t")),
+                    new ArrayList<String>(java.util.List.of("\n")),
+                    new ArrayList<String>(java.util.List.of("A", "", "C"))
+            );
+        }
+    }
+
+    @Nested
+    @DisplayName("language validation tests")
+    class LanguageValidationTests {
+
+        @Test
+        @DisplayName("Should throw exception when language is blank")
+        void testValidateNegativeLanguage() {
+            ArrayList<String> categories = new ArrayList<>();
+            categories.add("Thriller");
+            categories.add("Biographie");
+            String description = "C'était un brave partit trop tôt";
+            String language = "";
+
+            BookDetails bookWithBlankLanguage = BookDetails.builder()
+                    .categories(categories)
+                    .description(description)
+                    .language(language)
+                    .build();
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithBlankLanguage)
+            );
+
+            assertEquals(BookValidator.LANGUAGE_CANNOT_BE_BLANK, exception.getMessage());
+        }
+
+        @ParameterizedTest
+        @ValueSource(strings = {" ", "  ", "\t", "\n"})
+        @DisplayName("Should throw exception when language contains only whitespace")
+        void testValidateWhitespaceLanguage(String whitespace) {
+            ArrayList<String> categories = new ArrayList<>();
+            categories.add("Thriller");
+            categories.add("Biographie");
+            String description = "C'était un brave partit trop tôt";
+
+            BookDetails bookWithWhitespaceLanguage = BookDetails.builder()
+                    .categories(categories)
+                    .description(description)
+                    .language(whitespace)
+                    .build();
+
+            NotValidBookException exception = assertThrows(
+                    NotValidBookException.class,
+                    () -> BookValidator.validate(bookWithWhitespaceLanguage)
+            );
+
+            assertEquals(BookValidator.LANGUAGE_CANNOT_BE_BLANK, exception.getMessage());
+        }
+    }
+}