Plantuml: upgrade

The version we were using did not support timing diagrams.

Update to a more recent version where it's supported.

See merge request !778

software/plantuml/software.cfg

@@ -27,8 +27,9 @@ output = ${buildout:directory}/${:_buildout_section_name_}
 
 [plantuml.war]
 recipe = slapos.recipe.build:download
-url = https://downloads.sourceforge.net/project/plantuml/1.2018.13/plantuml.1.2018.13.war
-md5sum = cda05c8163237de039d777c197b3d282
+url = https://sourceforge.net/projects/plantuml/files/1.2020.15/plantuml.1.2020.15.war
+md5sum = ed203cb3b90df8f77492fa36ea6490a5
+
 
 [versions]
 slapos.recipe.template = 4.4

software/plantuml/test/test.py

@@ -87,6 +87,27 @@ class TestSimpleDiagram(PlantUMLTestCase, ImageComparisonTestCase):
     reference = Image.open(os.path.join(os.path.dirname(__file__), "data", "test_class_diagram.png"))
     self.assertImagesSimilar(Image.open(BytesIO(png)), reference)
 
+  def test_timing_diagram(self):
+    png = self.plantuml.processes(textwrap.dedent("""\
+    @startuml
+    robust "Web Browser" as WB
+    concise "Web User" as WU
+
+    @0
+    WU is Idle
+    WB is Idle
+
+    @100
+    WU is Waiting
+    WB is Processing
+
+    @300
+    WB is Waiting
+    @enduml
+    """))
+    reference = Image.open(os.path.join(os.path.dirname(__file__), "data", "test_timing_diagram.png"))
+    self.assertImagesSimilar(Image.open(BytesIO(png)), reference)
+
   def test_fonts(self):
     """Test slapos provided fonts are used"""
     png = self.plantuml.processes(textwrap.dedent("""\