Fix multiple out format implementation & test

diagrams/Diagram.py

@@ -3,9 +3,10 @@
 from .Context import Context
 from .utils import setdiagram
 
+
 class Diagram(Context):
     __curvestyles = ("ortho", "curved")
-    __outformats = ("png", "jpg", "svg", "pdf")
+    __outformats = ("png", "jpg", "svg", "pdf", "dot")
 
     # fmt: off
     _default_graph_attrs = {
@@ -47,7 +48,7 @@ def __init__(
         filename: str = "",
         direction: str = "LR",
         curvestyle: str = "ortho",
-        outformat: str = "png",
+        outformats: list = ["png"],
         show: bool = True,
         graph_attr: dict = {},
         node_attr: dict = {},
@@ -61,7 +62,7 @@ def __init__(
             If not given, it will be generated from the name.
         :param direction: Data flow direction. Default is 'left to right'.
         :param curvestyle: Curve bending style. One of "ortho" or "curved".
-        :param outformat: Output file format. Default is 'png'.
+        :param outformats: List of output file formats. Default is ['png'].
         :param show: Open generated image after save if true, just only save otherwise.
         :param graph_attr: Provide graph_attr dot config attributes.
         :param node_attr: Provide node_attr dot config attributes.
@@ -93,9 +94,10 @@ def __init__(
             raise ValueError(f'"{curvestyle}" is not a valid curvestyle')
         self.dot.graph_attr["splines"] = curvestyle
 
-        if not self._validate_outformat(outformat):
-            raise ValueError(f'"{outformat}" is not a valid output format')
-        self.outformat = outformat
+        for outformat in outformats:
+            if not self._validate_outformat(outformat):
+                raise ValueError(f'"{outformat}" is not a valid output format')
+        self.outformats = outformats
 
         # Merge passed in attributes
         self.dot.graph_attr.update(graph_attr)
@@ -140,4 +142,5 @@ def connect(self, node: "Node", node2: "Node", edge: "Edge") -> None:
         self.dot.edge(node.nodeid, node2.nodeid, **edge.attrs)
 
     def render(self) -> None:
-        self.dot.render(format=self.outformat, view=self.show, quiet=True)
+        for outformat in self.outformats:
+            self.dot.render(format=outformat, view=self.show, quiet=True)

tests/test_diagram.py

@@ -47,12 +47,12 @@ def test_validate_curvestyle(self):
     def test_validate_outformat(self):
         # Normal output formats.
         for fmt in ("png", "jpg", "svg", "pdf", "PNG", "dot"):
-            Diagram(outformat=fmt)
+            Diagram(outformats=[fmt])
 
         # Invalid output formats.
         for fmt in ("pnp", "jpe", "unknown"):
             with self.assertRaises(ValueError):
-                Diagram(outformat=fmt)
+                Diagram(outformats=[fmt])
 
     def test_with_global_context(self):
         self.assertIsNone(getdiagram())
@@ -115,12 +115,15 @@ def test_autolabel(self):
 
 
     def test_outformat_list(self):
-        """Check that outformat render all the files from the list."""
+        """Check that outformats render all the files from the list."""
         self.name = 'diagrams_image'
-        with Diagram(show=False, outformat=["dot", "png"]):
+        with Diagram(show=False, outformats=["dot", "png", "jpg", "svg", "pdf"]):
             Node("node1")
         # both files must exist
         self.assertTrue(os.path.exists(f"{self.name}.png"))
+        self.assertTrue(os.path.exists(f"{self.name}.jpg"))
+        self.assertTrue(os.path.exists(f"{self.name}.svg"))
+        self.assertTrue(os.path.exists(f"{self.name}.pdf"))
         self.assertTrue(os.path.exists(f"{self.name}.dot"))
 
         # clean the dot file as it only generated here