This is the v1 version, had the v2 before.

backend/backendutil/backendutil_test.go

@@ -0,0 +1,79 @@
+package backendutil
+
+import (
+	"time"
+)
+
+var testDate, _ = time.Parse(time.RFC1123Z, "Sat, 18 Jun 2016 12:00:00 +0900")
+
+const testHeaderString = "Content-Type: multipart/mixed; boundary=message-boundary\r\n" +
+	"Date: Sat, 18 Jun 2016 12:00:00 +0900\r\n" +
+	"Date: Sat, 19 Jun 2016 12:00:00 +0900\r\n" +
+	"From: Mitsuha Miyamizu <mitsuha.miyamizu@example.org>\r\n" +
+	"Reply-To: Mitsuha Miyamizu <mitsuha.miyamizu+replyto@example.org>\r\n" +
+	"Message-Id: 42@example.org\r\n" +
+	"Subject: Your Name.\r\n" +
+	"To: Taki Tachibana <taki.tachibana@example.org>\r\n" +
+	"\r\n"
+
+const testHeaderFromToString = "From: Mitsuha Miyamizu <mitsuha.miyamizu@example.org>\r\n" +
+	"To: Taki Tachibana <taki.tachibana@example.org>\r\n" +
+	"\r\n"
+
+const testHeaderDateString = "Date: Sat, 18 Jun 2016 12:00:00 +0900\r\n" +
+	"Date: Sat, 19 Jun 2016 12:00:00 +0900\r\n" +
+	"\r\n"
+
+const testHeaderNoFromToString = "Content-Type: multipart/mixed; boundary=message-boundary\r\n" +
+	"Date: Sat, 18 Jun 2016 12:00:00 +0900\r\n" +
+	"Date: Sat, 19 Jun 2016 12:00:00 +0900\r\n" +
+	"Reply-To: Mitsuha Miyamizu <mitsuha.miyamizu+replyto@example.org>\r\n" +
+	"Message-Id: 42@example.org\r\n" +
+	"Subject: Your Name.\r\n" +
+	"\r\n"
+
+const testAltHeaderString = "Content-Type: multipart/alternative; boundary=b2\r\n" +
+	"\r\n"
+
+const testTextHeaderString = "Content-Disposition: inline\r\n" +
+	"Content-Type: text/plain\r\n" +
+	"\r\n"
+
+const testTextContentTypeString = "Content-Type: text/plain\r\n" +
+	"\r\n"
+
+const testTextNoContentTypeString = "Content-Disposition: inline\r\n" +
+	"\r\n"
+
+const testTextBodyString = "What's your name?"
+
+const testTextString = testTextHeaderString + testTextBodyString
+
+const testHTMLHeaderString = "Content-Disposition: inline\r\n" +
+	"Content-Type: text/html\r\n" +
+	"\r\n"
+
+const testHTMLBodyString = "<div>What's <i>your\r\n</i> name?</div>"
+
+const testHTMLString = testHTMLHeaderString + testHTMLBodyString
+
+const testAttachmentHeaderString = "Content-Disposition: attachment; filename=note.txt\r\n" +
+	"Content-Type: text/plain\r\n" +
+	"\r\n"
+
+const testAttachmentBodyString = "My name is Mitsuha."
+
+const testAttachmentString = testAttachmentHeaderString + testAttachmentBodyString
+
+const testBodyString = "--message-boundary\r\n" +
+	testAltHeaderString +
+	"\r\n--b2\r\n" +
+	testTextString +
+	"\r\n--b2\r\n" +
+	testHTMLString +
+	"\r\n--b2--\r\n" +
+	"\r\n--message-boundary\r\n" +
+	testAttachmentString +
+	"\r\n--message-boundary--\r\n"
+
+const testMailString = testHeaderString + testBodyString