Fix matplot pt-unit stripping inflating whole-number dims 100x (#1654)

py/tests/test_plots.py

@@ -1,3 +1,4 @@
+import math
 import unittest
 from unittest.mock import patch
 import numpy as np
@@ -320,5 +321,52 @@ def test_nan_values_pass_through(self):
         self.assertTrue(np.isnan(z[1][0]))
 
 
+class _FakePlot:
+    """Minimal stand-in for a matplotlib figure.
+
+    matplot() only calls plot.savefig(buffer, format="svg"), so we just
+    write a fixed SVG whose root <svg> carries height/width in points.
+    """
+
+    def __init__(self, height, width):
+        self._svg = (
+            '<?xml version="1.0"?>'
+            '<svg xmlns="http://www.w3.org/2000/svg" '
+            'height="{}" width="{}"></svg>'.format(height, width)
+        )
+
+    def savefig(self, buffer, format="svg"):
+        buffer.write(self._svg)
+
+
+@unittest.skipUnless(visdom.BS4_AVAILABLE, "requires bs4/lxml")
+class TestMatplotResizable(unittest.TestCase):
+    def setUp(self):
+        self.viz = visdom.Visdom(send=False, use_incoming_socket=False)
+
+    def _matplot(self, plot, **kwargs):
+        captured = {}
+
+        def capture(svgstr=None, opts=None, **_):
+            captured["opts"] = opts
+            return "win1"
+
+        with patch.object(self.viz, "svg", side_effect=capture):
+            self.viz.matplot(plot, **kwargs)
+        return captured["opts"]
+
+    def test_whole_number_pt_not_inflated(self):
+        """432pt must strip 'pt' -> 432, not become 43200 (the 100x bug)."""
+        opts = self._matplot(_FakePlot("432pt", "640pt"), opts={"resizable": True})
+        self.assertEqual(opts["height"], 1.4 * math.ceil(432))  # 604.8
+        self.assertEqual(opts["width"], 1.35 * math.ceil(640))  # 864.0
+
+    def test_decimal_pt_still_correct(self):
+        """Decimal dims (which worked before) must keep working."""
+        opts = self._matplot(_FakePlot("345.6pt", "460.8pt"), opts={"resizable": True})
+        self.assertEqual(opts["height"], 1.4 * math.ceil(345.6))  # 484.4
+        self.assertEqual(opts["width"], 1.35 * math.ceil(460.8))  # 622.35
+
+
 if __name__ == "__main__":
     unittest.main()

py/visdom/__init__.py

@@ -1470,14 +1470,14 @@ def matplot(self, plot, opts=None, env=None, win=None):
             if height is not None:
                 if not isstr(height):
                     height = height.group(1)
-                height = height.replace("pt", "00")
+                height = height.replace("pt", "")
                 opts["height"] = 1.4 * int(math.ceil(float(height)))
         if "width" not in opts:
             width = width or re.search(r'width\="([0-9\.]*)pt"', svg)
             if width is not None:
                 if not isstr(width):
                     width = width.group(1)
-                width = width.replace("pt", "00")
+                width = width.replace("pt", "")
                 opts["width"] = 1.35 * int(math.ceil(float(width)))
         return self.svg(svgstr=svg, opts=opts, env=env, win=win)