Add pytest for ProgressDisplay logger

Author: Alxiice

pyTests/system/__init__.py

@@ -0,0 +1,27 @@
+"""
+Collection of unit tests for the ProgressDisplay logger.
+"""
+
+import pytest
+
+from pyalicevision.system import ConsoleProgressDisplay
+
+
+PROGRESS_BAR_TEMPLATE = """{desc}
+0%   10   20   30   40   50   60   70   80   90   100%
+|----|----|----|----|----|----|----|----|----|----|
+"""
+
+def test_progress_display(capfd):
+    items = range(10)
+    desc = "Iter over items"
+    stars_by_item = "*" * (50 // len(items))
+    progress = ConsoleProgressDisplay(len(items), desc + "\n")
+    for index, _i in enumerate(items):
+        assert(progress.count() == index)
+        out, _ = capfd.readouterr()  # readout is flushed each time we call this so we only have to check for diff
+        if index == 0:
+            assert out == PROGRESS_BAR_TEMPLATE.format(desc=desc)
+        else:
+            assert out == stars_by_item
+        progress += 1