fix: Fix template body parameter

Author: skupriienko

mailjet_rest/builders.py

@@ -244,7 +244,7 @@ def set_content(self, text: str | None = None, html: str | None = None, mjml: st
         if html:
             self._data["HTMLPart"] = html
         if mjml:
-            self._data["MJMLPart"] = mjml
+            self._data["MJMLContent"] = mjml
         return self
 
     def set_headers(self, headers: dict[str, str]) -> Self:
@@ -268,7 +268,7 @@ def build(self) -> dict[str, Any]:
         Raises:
             ValueError: If no valid text, html or mjml boundary tokens are passed.
         """
-        if not any(k in self._data for k in ("TextPart", "HTMLPart", "MJMLPart")):
+        if not any(k in self._data for k in ("TextPart", "HTMLPart", "MJMLContent")):
             msg = "Template validation failed: At least one of text, html, or mjml content is required."
             raise ValueError(msg)
 

tests/unit/test_builders.py

@@ -55,7 +55,7 @@ def test_template_content_builder_mapping() -> None:
     # Check for correct hyphenated keys required by the Template API
     assert payload.get("TextPart") == "Plain text"
     assert payload.get("HTMLPart") == "<h1>Hello</h1>"
-    assert payload.get("MJMLPart") == "<mjml></mjml>"
+    assert payload.get("MJMLContent") == "<mjml></mjml>"
     assert payload.get("Headers") == {"Reply-To": "support@example.com"}
 
 
@@ -66,7 +66,7 @@ def test_template_content_builder_partial_data() -> None:
 
     assert "TextPart" in payload
     assert "HTMLPart" not in payload
-    assert "MJMLPart" not in payload
+    assert "MJMLContent" not in payload
 
 
 def test_message_builder_validation_fails() -> None:
@@ -168,7 +168,7 @@ def test_template_content_builder_exhaustive() -> None:
     res = builder.build()
     assert res.get("TextPart") == "Text"
     assert res.get("HTMLPart") == "HTML"
-    assert res.get("MJMLPart") == "MJML"
+    assert res.get("MJMLContent") == "MJML"
     assert res.get("Headers", {}).get("Key") == "Val"
 
 def test_message_builder_attachments_branches() -> None:
@@ -263,4 +263,4 @@ def test_template_content_builder_partial_content() -> None:
     assert "HTMLPart" in builder2.build()
 
     builder3 = TemplateContentBuilder().set_content(mjml="mjml")
-    assert "MJMLPart" in builder3.build()
+    assert "MJMLContent" in builder3.build()