From caf2c95dbb295b656f9dae9ae014bb37ee0f319a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=90=D1=80=D1=82=D1=8E=D1=89=D0=B8=D0=BA=20=D0=90=D0=BD?=
 =?UTF-8?q?=D0=B0=D1=81=D1=82=D0=B0=D1=81=D0=B8=D1=8F?=
 <nastya.2012.v@yandex.ru>
Date: Mon, 24 Aug 2026 21:14:09 +0300
Subject: [PATCH] test(student): add JUnit tests

---
 .../java/ru/project/student/StudentTest.java  | 168 ++++++++++++++++++
 .../java/ru/project/student/StudentText.java  |   4 -
 2 files changed, 168 insertions(+), 4 deletions(-)
 create mode 100644 app/src/test/java/ru/project/student/StudentTest.java
 delete mode 100644 app/src/test/java/ru/project/student/StudentText.java

diff --git a/app/src/test/java/ru/project/student/StudentTest.java b/app/src/test/java/ru/project/student/StudentTest.java
new file mode 100644
index 0000000..e9a7434
--- /dev/null
+++ b/app/src/test/java/ru/project/student/StudentTest.java
@@ -0,0 +1,168 @@
+package ru.project.student;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+
+
+class StudentTest {
+    @Test
+    void shouldCreateValidStudent() {
+        Student student = new StudentBuilder()
+                .setGroupNumber("101")
+                .setAverageGrade(4.5)
+                .setRecordBookNumber("12345")
+                .build();
+
+        assertEquals("101", student.getGroupNumber());
+        assertEquals(4.5, student.getAverageGrade());
+        assertEquals("12345", student.getRecordBookNumber());
+    }
+
+    @Test
+    void shouldThrowExceptionWhenGroupNumberIsEmpty() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            new StudentBuilder()
+                    .setGroupNumber("")
+                    .setAverageGrade(4.5)
+                    .setRecordBookNumber("12345")
+                    .build();
+        });
+    }
+
+    @Test
+    void shouldThrowExceptionWhenAverageGradeIsGreaterThanFive() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            new StudentBuilder()
+                    .setGroupNumber("101")
+                    .setAverageGrade(6.0)
+                    .setRecordBookNumber("12345")
+                    .build();
+        });
+    }
+
+    @Test
+    void shouldThrowExceptionWhenAverageGradeIsLessThanZero() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            new StudentBuilder()
+                    .setGroupNumber("101")
+                    .setAverageGrade(-1.0)
+                    .setRecordBookNumber("12345")
+                    .build();
+        });
+    }
+
+    @Test
+    void shouldCreateStudentWhenAverageGradeIsZero() {
+        Student student = new StudentBuilder()
+                .setGroupNumber("101")
+                .setAverageGrade(0.0)
+                .setRecordBookNumber("12345")
+                .build();
+
+        assertEquals(0.0, student.getAverageGrade());
+    }
+
+    @Test
+    void shouldCreateStudentWhenAverageGradeIsFive() {
+        Student student = new StudentBuilder()
+                .setGroupNumber("101")
+                .setAverageGrade(5.0)
+                .setRecordBookNumber("12345")
+                .build();
+
+        assertEquals(5.0, student.getAverageGrade());
+    }
+
+    @Test
+    void shouldThrowExceptionWhenRecordBookNumberIsEmpty() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            new StudentBuilder()
+                    .setGroupNumber("101")
+                    .setAverageGrade(4.5)
+                    .setRecordBookNumber("")
+                    .build();
+        });
+    }
+
+    @Test
+    void shouldThrowExceptionWhenGroupNumberIsNull() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            new StudentBuilder()
+                    .setGroupNumber(null)
+                    .setAverageGrade(4.5)
+                    .setRecordBookNumber("12345")
+                    .build();
+        });
+    }
+
+    @Test
+    void shouldThrowExceptionWhenGroupNumberIsBlank() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            new StudentBuilder()
+                    .setGroupNumber("   ")
+                    .setAverageGrade(4.5)
+                    .setRecordBookNumber("12345")
+                    .build();
+        });
+    }
+
+    @Test
+    void shouldThrowExceptionWhenRecordBookNumberIsNull() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            new StudentBuilder()
+                    .setGroupNumber("101")
+                    .setAverageGrade(4.5)
+                    .setRecordBookNumber(null)
+                    .build();
+        });
+    }
+
+    @Test
+    void shouldThrowExceptionWhenRecordBookNumberIsBlank() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            new StudentBuilder()
+                    .setGroupNumber("101")
+                    .setAverageGrade(4.5)
+                    .setRecordBookNumber("   ")
+                    .build();
+        });
+    }
+
+    @Test
+    void shouldReturnTrueWhenStudentsAreEqual() {
+        Student student1 = new StudentBuilder()
+                .setGroupNumber("101")
+                .setAverageGrade(4.5)
+                .setRecordBookNumber("12345")
+                .build();
+
+        Student student2 = new StudentBuilder()
+                .setGroupNumber("101")
+                .setAverageGrade(4.5)
+                .setRecordBookNumber("12345")
+                .build();
+
+        assertEquals(student1, student2);
+        assertEquals(student1.hashCode(), student2.hashCode());
+    }
+
+    @Test
+    void shouldReturnFalseWhenStudentsAreDifferent() {
+        Student student1 = new StudentBuilder()
+                .setGroupNumber("101")
+                .setAverageGrade(4.5)
+                .setRecordBookNumber("12345")
+                .build();
+
+        Student student2 = new StudentBuilder()
+                .setGroupNumber("102")
+                .setAverageGrade(4.5)
+                .setRecordBookNumber("12345")
+                .build();
+
+        assertNotEquals(student1, student2);
+    }
+}
diff --git a/app/src/test/java/ru/project/student/StudentText.java b/app/src/test/java/ru/project/student/StudentText.java
deleted file mode 100644
index cad3bef..0000000
--- a/app/src/test/java/ru/project/student/StudentText.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package ru.project.student;
-
-public class StudentText {
-}