(BSR)[API] fix: fix educational institution institutionId field in factory

Author: jcicurel-pass

api/src/pcapi/core/educational/factories.py

@@ -41,7 +41,7 @@ class EducationalInstitutionFactory(BaseFactory[models.EducationalInstitution]):
     class Meta:
         model = models.EducationalInstitution
 
-    institutionId = factory.Sequence(lambda x: f"{x + 1}470009E")
+    institutionId = factory.Sequence(lambda x: _get_institution_id(x))
     name = factory.Sequence("DE LA TOUR{}".format)
     city = "PARIS"
     postalCode = "75000"
@@ -52,6 +52,13 @@ class Meta:
     longitude = 2.3522
 
 
+def _get_institution_id(sequence_number: int) -> str:
+    # institutionId (UAI) is a unique string with 7 digits and 1 letter
+    # put sequence number at the end and left-fill with 0
+    prefix = (7 - len(str(sequence_number))) * "0"
+    return f"{prefix}{sequence_number}F"
+
+
 class CollectiveOfferFactory(BaseFactory[models.CollectiveOffer]):
     class Meta:
         model = models.CollectiveOffer