SVG: Add more sophisticated test suit

This test suit tests SVG on a big files, as opposite of testing one
specific aspect of the standard by atomic files.

tests/python/CMakeLists.txt

@@ -632,7 +632,7 @@ endif()
 
 # SVG Import
 if(True)
-  set(_svg_render_tests path)
+  set(_svg_render_tests complex path)
 
   foreach(render_test ${_svg_render_tests})
     add_python_test(

tests/python/bl_io_curve_svg_test.py

@@ -50,7 +50,10 @@ def main():
     from modules import render_report
     report = render_report.Report('IO Curve SVG', output_dir, idiff)
     report.set_pixelated(True)
-    print(test_dir)
+
+    test_dir_name = Path(test_dir).name
+    if test_dir_name == 'complex':
+        report.set_fail_percent(0.01)
 
     ok = report.run(test_dir, blender, get_arguments, batch=True)
 

tests/python/modules/render_report.py

@@ -166,6 +166,9 @@ class Report:
     def set_fail_threshold(self, threshold):
         self.fail_threshold = threshold
 
+    def set_fail_percent(self, percent):
+        self.fail_percent = percent
+
     def set_reference_dir(self, reference_dir):
         self.reference_dir = reference_dir