WIP: #57 Én databaseinstans og testmodus for database

Databasen har testmode=False som parameter i sin __init__.

Dersom parameteren er True vil det lages en database-fil med navnet testDatabase.

test_database.py initialiserer db i testmodus og sletter testDatabase-filen når testene er ferdig.

Det som er litt dumt er at soitool.*.py-filer som selv lager database vil bruke original database under testing (ikke test-database). For å fikse det må vi isåfall ha en testmode-parameter i alle slike funksjoner. Det er per nå bare codebook_to_pdf.py som bruker original database under testing.

soitool/codebook.py

-"""Codebook.
+"""GUI-interface towards database-table 'CodeBook'.
 
 Contains functionality for viewing, editing and inserting new rows
 in the database-table 'CodeBook'.
@@ -6,7 +6,6 @@ in the database-table 'CodeBook'.
 from PySide2.QtWidgets import QTableView
 from PySide2.QtSql import QSqlDatabase, QSqlTableModel
 from PySide2.QtCore import Qt
-from soitool.database import DBPATH  # , Database
 from soitool.style import CODEBOOK_HEADER_FONT, CODEBOOK_HEADER_BACKGROUND_CSS
 
 # Name and type of database
@@ -17,17 +16,19 @@ DBTYPE = "QSQLITE"
 class CodeBookTableView(QTableView):
     """TableView with a model of the 'codebook'-table from database.
 
-    This modified QTableView creates a CodeBookTableModel,
-    which reads the codebook-table.
-    User can add, edit and insert entries to the database through this View.
+    This modified QTableView creates a CodeBookTableModel, which reads the
+    codebook-table. User can add, edit, delete and insert entries through this
+    view.
 
+    Parameter 'database' should be an instance of soitool.database.Database,
+    and is used to create a QSqlDatabase from the database-file.
     Raises RuntimeError if database does not open.
     """
 
-    def __init__(self):
+    def __init__(self, database):
         super().__init__()
         db = QSqlDatabase.addDatabase(DBTYPE, CONNAME)
-        db.setDatabaseName(DBPATH)
+        db.setDatabaseName(database.db_path)
 
         if not db.open():
             raise RuntimeError("Could not open database.")