Feat: add delete_student

backend/service/services.py

@@ -84,7 +84,6 @@ def update_student(
     tribe_repo: AbstractRepository,
     conn,
 ) -> Student:
-
     try:
         _tribe = tribe_repo.get(tribe)
     except TribeRepositoryError:
@@ -103,3 +102,15 @@ def update_student(
 
     conn.commit()
     return student
+
+
+def delete_student(
+    id: str,
+    student_repo: AbstractRepository,
+    conn,
+) -> Student:
+    try:
+        student_repo.delete(id=id)
+    except StudentRepositoryError:
+        raise StudentDoesExist("The student with id {id} does not exists")
+    conn.commit()

tests/unit/test_service.py

@@ -77,7 +77,7 @@ class FakeStudentRepository(AbstractRepository):
         try:
             self._students.pop(id)
         except KeyError:
-            raise StudentRepositoryError(f"The student {student} does not exists")
+            raise StudentRepositoryError(f"The student with id {id} does not exists")
 
 
 class FakeConn:
@@ -247,7 +247,7 @@ def test_update_student():
     assert len(listed_student) == 2
 
 
-def test_update_student_tribe_doesnt_exists():
+def test_update_student_tribe_doesnt_exist():
     tribes = build_tribes(2)
     tribe_repo = FakeTribeRepository(tribes)
     students = build_student(tribes, 1)
@@ -278,7 +278,7 @@ def test_update_student_tribe_doesnt_exists():
     assert len(listed_student) == 2
 
 
-def test_update_student_doesnt_exists():
+def test_update_student_doesnt_exist():
     tribes = build_tribes(2)
     tribe_repo = FakeTribeRepository(tribes)
     students = build_student(tribes, 1)
@@ -307,3 +307,44 @@ def test_update_student_doesnt_exists():
 
     listed_student = student_repo.list()
     assert len(listed_student) == 2
+
+
+def test_delete_student():
+    tribes = build_tribes(2)
+    tribe_repo = FakeTribeRepository(tribes)
+    students = build_student(tribes, 1)
+    student_repo = FakeStudentRepository(students)
+    conn = FakeConn()
+
+    student = students.pop()
+
+    services.delete_student(
+        id=student.id,
+        student_repo=student_repo,
+        conn=conn,
+    )
+
+    assert conn.committed is True
+
+    listed_student = student_repo.list()
+    assert listed_student == students
+
+
+def test_delete_student_doesnt_exist():
+    tribes = build_tribes(2)
+    tribe_repo = FakeTribeRepository(tribes)
+    students = build_student(tribes, 1)
+    student_repo = FakeStudentRepository(students)
+    conn = FakeConn()
+
+    with pytest.raises(StudentDoesExist):
+        services.delete_student(
+            id="not existing id",
+            student_repo=student_repo,
+            conn=conn,
+        )
+
+    assert conn.committed is False
+
+    listed_student = student_repo.list()
+    assert set(listed_student) == set(students)