feat(ses): RFC 5322 / MIME builder for TestRenderEmailTemplate

crates/fakecloud-e2e/Cargo.toml

@@ -54,5 +54,6 @@ fakecloud-testkit = { path = "../fakecloud-testkit", features = ["sdk-clients"]
 tempfile = { workspace = true }
 sha2 = { workspace = true }
 p256 = { version = "0.13", features = ["ecdsa", "pem", "pkcs8"] }
+mail-parser = "0.10"
 rsa = { workspace = true }
 x509-cert = { version = "0.2", features = ["pem"] }

crates/fakecloud-e2e/tests/ses_mime.rs

@@ -0,0 +1,102 @@
+mod helpers;
+
+use aws_sdk_sesv2::types::{EmailTemplateContent, EmailTemplateMetadata};
+use helpers::TestServer;
+use mail_parser::MessageParser;
+
+/// Render a templated email through SESv2 `TestRenderEmailTemplate` and verify
+/// the returned MIME parses cleanly into the expected multipart/alternative
+/// structure with proper Date / Message-ID / encoding headers.
+#[tokio::test]
+async fn ses_test_render_template_returns_rfc5322_multipart() {
+    let server = TestServer::start().await;
+    let ses = server.sesv2_client().await;
+
+    ses.create_email_template()
+        .template_name("welcome")
+        .template_content(
+            EmailTemplateContent::builder()
+                .subject("Welcome, {{name}}")
+                .text("Hi {{name}}, plain text greeting")
+                .html("<p>Hi <b>{{name}}</b>, html greeting</p>")
+                .build(),
+        )
+        .send()
+        .await
+        .unwrap();
+
+    let resp = ses
+        .test_render_email_template()
+        .template_name("welcome")
+        .template_data(r#"{"name":"Alice"}"#)
+        .send()
+        .await
+        .unwrap();
+    let mime_str = resp.rendered_template().to_string();
+
+    let parsed = MessageParser::default().parse(mime_str.as_bytes()).unwrap();
+    assert_eq!(parsed.subject().unwrap(), "Welcome, Alice");
+    assert!(parsed.date().is_some(), "Date header must be present");
+    assert!(parsed.message_id().is_some(), "Message-ID must be present");
+
+    let parts: Vec<_> = parsed.parts.iter().collect();
+    assert!(
+        parts.len() >= 3,
+        "expected multipart/alternative with two parts and root"
+    );
+
+    let bodies: Vec<String> = parsed
+        .text_bodies()
+        .map(|p| p.text_contents().unwrap_or_default().to_string())
+        .chain(
+            parsed
+                .html_bodies()
+                .map(|p| p.text_contents().unwrap_or_default().to_string()),
+        )
+        .collect();
+    assert!(bodies.iter().any(|b| b.contains("Hi Alice, plain text")));
+    assert!(bodies
+        .iter()
+        .any(|b| b.contains("<p>Hi <b>Alice</b>, html greeting</p>")));
+}
+
+#[tokio::test]
+async fn ses_test_render_template_handles_non_ascii() {
+    let server = TestServer::start().await;
+    let ses = server.sesv2_client().await;
+
+    ses.create_email_template()
+        .template_name("intl")
+        .template_content(
+            EmailTemplateContent::builder()
+                .subject("héllo {{name}}")
+                .text("café for {{name}}")
+                .build(),
+        )
+        .send()
+        .await
+        .unwrap();
+
+    let resp = ses
+        .test_render_email_template()
+        .template_name("intl")
+        .template_data(r#"{"name":"Élise"}"#)
+        .send()
+        .await
+        .unwrap();
+    let mime_str = resp.rendered_template().to_string();
+
+    let parsed = MessageParser::default()
+        .parse(mime_str.as_bytes())
+        .expect("MIME parses");
+    assert_eq!(parsed.subject().unwrap(), "héllo Élise");
+    let body = parsed
+        .text_bodies()
+        .next()
+        .unwrap()
+        .text_contents()
+        .unwrap();
+    assert!(body.contains("café for Élise"));
+
+    let _ = EmailTemplateMetadata::builder().build();
+}

crates/fakecloud-ses/Cargo.toml

@@ -12,6 +12,7 @@ fakecloud-core = { workspace = true }
 fakecloud-aws = { workspace = true }
 fakecloud-persistence = { workspace = true }
 async-trait = { workspace = true }
+base64 = { workspace = true }
 form_urlencoded = "1"
 chrono = { workspace = true }
 http = { workspace = true }

crates/fakecloud-ses/src/lib.rs

@@ -1,4 +1,5 @@
 pub mod fanout;
+pub mod mime;
 pub mod service;
 pub mod state;
 pub mod v1;