Add tests/ dir and a test

Add a test for generating mail with melib's Draft struct.

tests/generated.mail

@@ -0,0 +1,40 @@
+From: 
+To: 
+Cc: 
+Bcc: 
+Subject: 
+MIME-Version: 1.0
+Content-Type: multipart/mixed; charset="utf-8"; boundary="bzz_bzz__bzz__"
+
+This is a MIME formatted message with attachments. Use a MIME-compliant client to view it properly.
+--bzz_bzz__bzz__
+
+hello world.
+--bzz_bzz__bzz__
+Content-Type: image/gif; name="test_image.gif"; charset="utf-8"
+Content-Transfer-Encoding: base64
+
+R0lGODdhKAAXAOfZAAABzAADzQAEzgQFtBEAxAAGxBcAxwALvRcFwAAPwBcLugATuQEUuxoNuxYQ
+sxwOvAYVvBsStSAVtx8YsRUcuhwhth4iuCQsyDAwuDc1vTc3uDg4uT85rkc9ukJBvENCvURGukdF
+wUVKt0hLuUxPvVZSvFlYu1hbt2BZuFxdul5joGhqlnNuf3FvlnBvwXJyt3Jxw3N0oXx1gH12gV99
+z317f3N7spFxwHp5wH99gYB+goF/g25+26tziIOBhWqD3oiBjICAuudkjIN+zHeC2n6Bzc1vh4eF
+iYaBw8F0kImHi4KFxYyHmIWIvI2Lj4uIvYaJyY+IuJGMi5iJl4qKxZSMmIuLxpONnpGPk42NvI2M
+1LKGl46OvZePm5ORlZiQnJqSnpaUmLyJnJuTn5iVmZyUoJGVyZ2VoZSVw5iXoZmWrO18rJiUyp6W
+opuYnKaVnZ+Xo5yZncaMoaCYpJiaqo+Z2Z2annuf5qGZpa2WoJybpZmayZ2Z0KCZypydrZ6dp6Cd
+oZ6a0aGay5ucy5+eqKGeouWMgp+b0qKbzKCfqdqPnp2ezaGgqqOgpKafqrScpp+gz6ajqKujr62j
+qayksKmmq62lsaiosqqorOyWnaqqtKeqzLGptaurta2rr7Kqtq+ssLOrt6+uuLGusuqhfbWtubCv
+ubKvs7GwurOwtPSazbevu+ali7SxtbiwvOykjLOyvLWytuCmqOankrSzvbazuLmyvrW0vre0uba1
+wLi1ury0wLm2u721wbe3wbq3vMC2vLi4wr+3w7m5w8C4xLi6yry6vsG5xbu7xcC6zMK6xry8xry+
+u8O7x729x8C9wb++yMG+wsO+vMK/w8a+y8e/zMnBzcXH18nL2///////////////////////////
+////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////ywAAAAAKAAXAAAI/gBP4Cjh
+IYMLEh0w4EgBgsMLEyFGFBEB5cOFABgzatS4AVssZAOsLOHCxooVMzCyoNmzaBOkJlS0VEDyZMjG
+mxk3XOMF60CDBgsoPABK9KcDCRImPCiQYAECAgQCRMU4VSrGCjFarBgUSJCgQ10FBTrkNRCfPnz4
+dA3UNa1btnDZqgU7Ntqzu3ej2X2mFy9eaHuhNRtMGJrhwYYN930G2K7eaNIY34U2mfJkwpgzI9Yr
+GBqwR2KSvAlMOXHnw5pTNzPdLNoWIWtU9XjGjDEYS8LAlFm1SrVvzIKj5TH0KpORSZOryPgCZgqL
+Ob+jG0YVRBErUrOiiGJ8KxgtYsh27xWL/tswnTtEbsiRVYdJNMHk4yOGhswGjR88UKjQ9Ey+/8TL
+XKKGGn7Akph/8XX2WDTTcAYfguVt9hhrEPqmzIOJ3VUheb48WJiHG6amC4i+WVJKKCimqGIoYxyj
+WWK8kKjaJ9bA18sxvXjYhourmbbMMrjI+OIn1QymDCVXANGFK4S1gQw0PxozzC+33FLLKUJq9gk1
+gyWDhyNwrMLkYGUEM4wvuLRiCiieXIJJJVlmJskcZ9TZRht1lnFGGmTMkMoonVQSSSOFAGJHHI0w
+ouiijDaaCCGQRgrpH3q4QYYXWDihxBE+7KCDDjnUIEVAADs=
+--bzz_bzz__bzz__--

tests/generating_email.rs

@@ -0,0 +1,49 @@
+use melib;
+use ui::mime_apps;
+
+use melib::email::Draft;
+use mime_apps::query_mime_info;
+
+#[test]
+fn build_draft() {
+    let mut new_draft = Draft::default();
+    let mut attachment = melib::email::attachment_from_file(&"./tests/test_image.gif")
+        .expect("Could not open test_image.gif.");
+    if let Ok(mime_type) = query_mime_info("./tests/test_image.gif") {
+        match attachment.content_type {
+            melib::email::ContentType::Other { ref mut tag, .. } => {
+                *tag = mime_type;
+            }
+            _ => {}
+        }
+    }
+    if new_draft.headers().contains_key("User-Agent") {
+        new_draft.headers_mut().remove("User-Agent");
+        let pos = new_draft
+            .header_order
+            .iter()
+            .position(|k| k == "User-Agent")
+            .unwrap();
+        new_draft.header_order.remove(pos);
+    }
+    {
+        new_draft.headers_mut().remove("Date");
+        let pos = new_draft
+            .header_order
+            .iter()
+            .position(|k| k == "Date")
+            .unwrap();
+        new_draft.header_order.remove(pos);
+    }
+
+    new_draft.attachments_mut().push(attachment);
+    new_draft.set_body("hello world.".to_string());
+    let raw = new_draft.finalise().expect("could not finalise draft");
+    let boundary_def = raw.find("bzz_bzz__bzz__").unwrap();
+    let boundary_end = boundary_def + raw[boundary_def..].find("\"").unwrap();
+    let boundary = raw[boundary_def..boundary_end].to_string();
+    let boundary_str = &boundary["bzz_bzz__bzz__".len()..];
+
+    let raw = raw.replace(boundary_str, "");
+    assert_eq!(include_str!("generated.mail"), &raw);
+}

ui/src/lib.rs

@@ -25,7 +25,7 @@
 
 #[macro_use]
 extern crate melib;
-extern crate mime_apps;
+pub extern crate mime_apps;
 extern crate notify_rust;
 extern crate text_processing;
 #[macro_use]