Add backend unit tests

- Add unit testing code in backend/tests/
- Change to snake-case for script/file/directory names
- Use os.path.join() instead of '/'
- Refactor script code into function defs and a main-guard
- Make global vars all-caps

Some fixes:
- For getting descriptions, some wiki redirects weren't properly resolved
- Linked images were sub-optimally propagated
- Generation of reduced trees assumed a wiki-id association implied a description
- Tilo.py had potential null dereferences by not always using a reduced node set
- EOL image downloading didn't properly wait for all threads to end when finishing

1 files changed, 45 insertions, 0 deletions

diff --git a/backend/tol_data/gen_pop_data.py b/backend/tol_data/gen_pop_data.py
new file mode 100755
index 0000000..e6a646e
--- /dev/null
+++ b/backend/tol_data/gen_pop_data.py
@@ -0,0 +1,45 @@
+#!/usr/bin/python3
+
+"""
+Reads enwiki page view info from a database, and stores it
+as node popularity values in the database.
+"""
+
+import os, sqlite3
+
+PAGEVIEWS_DB = os.path.join('enwiki', 'pageview_data.db')
+DB_FILE = 'data.db'
+
+def genData(pageviewsDb: str, dbFile: str) -> None:
+	dbCon = sqlite3.connect(dbFile)
+	dbCur = dbCon.cursor()
+	#
+	print('Getting view counts')
+	pdbCon = sqlite3.connect(pageviewsDb)
+	pdbCur = pdbCon.cursor()
+	nodeToViews: dict[str, int] = {} # Maps node names to counts
+	iterNum = 0
+	for wikiId, views in pdbCur.execute('SELECT id, views from views'):
+		iterNum += 1
+		if iterNum % 1e4 == 0:
+			print(f'At iteration {iterNum}') # Reached 1.6e6
+		#
+		row = dbCur.execute('SELECT name FROM wiki_ids WHERE id = ?', (wikiId,)).fetchone()
+		if row is not None:
+			nodeToViews[row[0]] = views
+	pdbCon.close()
+	#
+	print(f'Writing {len(nodeToViews)} entries to db')
+	dbCur.execute('CREATE TABLE node_pop (name TEXT PRIMARY KEY, pop INT)')
+	for nodeName, views in nodeToViews.items():
+		dbCur.execute('INSERT INTO node_pop VALUES (?, ?)', (nodeName, views))
+	#
+	dbCon.commit()
+	dbCon.close()
+
+if __name__ == '__main__':
+	import argparse
+	parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
+	args = parser.parse_args()
+	#
+	genData(PAGEVIEWS_DB, DB_FILE)