PR for v.1.2.2

CHANGES.rst

@@ -1,3 +1,10 @@
+Release 1.2.2
+=========================================
+
+* **BUGFIX:** Fixed behavior where ``Chart.download_chart(format = 'svg')`` was incorrectly returning a PNG rather than an SVG ( #63 ).
+
+------------------
+
 Release 1.2.1
 =========================================
 

highcharts_core/__version__.py

@@ -1 +1 @@
-__version__ = '1.2.1'
+__version__ = '1.2.2'

highcharts_core/chart.py

@@ -464,6 +464,7 @@ def download_chart(self,
                                           constructor = constructor,
                                           scale = scale,
                                           width = width,
+                                          format_ = format,
                                           **kwargs)
 
         if not isinstance(server_instance, ExportServer):
@@ -477,6 +478,7 @@ def download_chart(self,
                                              timeout = timeout,
                                              options = self.options,
                                              constructor = constructor,
+                                             format_ = format,
                                              **kwargs)
 
     @classmethod

highcharts_core/headless_export.py

@@ -767,9 +767,13 @@ def request_chart(self,
 
         result.raise_for_status()
 
-        if filename:
+        if filename and self.format_ != 'svg':
             with open(filename, 'wb') as file_:
                 file_.write(result.content)
+        elif filename and self.format_ == 'svg':
+            content = str(result.content, encoding = 'utf-8')
+            with open(filename, 'wt') as file_:
+                file_.write(content)
 
         return result.content
 

tests/test_headless_export.py

@@ -144,23 +144,31 @@ def test_url(value, error):
      'headless_export/output/test-basic.png',
      {
       'timeout': 5,
-      'format': 'png',
+      'format_': 'png',
       'constructor': 'Chart'
      },
      None),
     ('headless_export/with-series-types.js',
      'headless_export/output/test-with-series-types.png',
      {
       'timeout': 5,
-      'format': 'png',
+      'format_': 'png',
       'constructor': 'Chart'
      },
      None),
     ('headless_export/with-chart-type.js',
      'headless_export/output/test-with-chart-type.png',
      {
       'timeout': 5,
-      'format': 'png',
+      'format_': 'png',
+      'constructor': 'Chart'
+     },
+     None),
+    ('headless_export/with-chart-type.js',
+     'headless_export/output/test-with-chart-type.svg',
+     {
+      'timeout': 5,
+      'format_': 'svg',
       'constructor': 'Chart'
      },
      None),
@@ -177,7 +185,7 @@ def test_get_chart(input_files,
         target_file = check_input_file(input_files, 
                                        target_filename,
                                        create_directory = create_output_directory)
-
+        
         with open(input_file, 'r') as file_:
             as_str = file_.read()
 
@@ -190,6 +198,17 @@ def test_get_chart(input_files,
 
         if not error:
             result = cls.get_chart(**kwargs)
+
+            format = kwargs.get('format_', None)
+            print(f'TESTING FORMAT: {format}')
+
             assert result is not None
             if target_filename:
                 assert checkers.is_on_filesystem(target_file) is True
+                if format == 'svg':
+                    with open(target_file, 'r', encoding = 'utf-8') as file_:
+                        file_contents = file_.read()
+                    contents = str(file_contents)
+                    assert contents.startswith(
+                        '<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"'
+                    ) is True