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# frozen_string_literal: true
require 'spec_helper'
describe Mail::ContentIdField do
# Content-ID Header Field
#
# In constructing a high-level user agent, it may be desirable to allow
# one body to make reference to another. Accordingly, bodies may be
# labelled using the "Content-ID" header field, which is syntactically
# identical to the "Content-ID" header field:
#
# id := "Content-ID" ":" msg-id
#
# Like the Content-ID values, Content-ID values must be generated to be
# world-unique.
#
# The Content-ID value may be used for uniquely identifying MIME
# entities in several contexts, particularly for caching data
# referenced by the message/external-body mechanism. Although the
# Content-ID header is generally optional, its use is MANDATORY in
# implementations which generate data of the optional MIME media type
# "message/external-body". That is, each message/external-body entity
# must have a Content-ID field to permit caching of such data.
#
# It is also worth noting that the Content-ID value has special
# semantics in the case of the multipart/alternative media type. This
# is explained in the section of RFC 2046 dealing with
# multipart/alternative.
describe "initialization" do
it "should initialize" do
expect { Mail::ContentIdField.new("<1234@test.lindsaar.net>") }.not_to raise_error
end
it "should accept a string with the field name" do
c = Mail::ContentIdField.new('Content-ID: <1234@test.lindsaar.net>')
expect(c.name).to eq 'Content-ID'
expect(c.value).to eq '<1234@test.lindsaar.net>'
expect(c.content_id).to eq '1234@test.lindsaar.net'
end
it "should accept a string without the field name" do
m = Mail::ContentIdField.new('<1234@test.lindsaar.net>')
expect(m.name).to eq 'Content-ID'
expect(m.value).to eq '<1234@test.lindsaar.net>'
expect(m.content_id).to eq '1234@test.lindsaar.net'
end
it "should accept a nil value and generate a content_id" do
m = Mail::ContentIdField.new(nil)
expect(m.name).to eq 'Content-ID'
expect(m.value).not_to be_nil
end
it "should allow it to be encoded" do
m = Mail::ContentIdField.new('<1234@test.lindsaar.net>')
expect(m.encoded).to eq "Content-ID: <1234@test.lindsaar.net>\r\n"
end
it "should allow it to be decoded" do
m = Mail::ContentIdField.new('<1234@test.lindsaar.net>')
expect(m.decoded).to eq "<1234@test.lindsaar.net>"
end
end
describe "ensuring only one message ID" do
it "should not accept a string with multiple message IDs but only return the first" do
m = Mail::ContentIdField.new('<1234@test.lindsaar.net> <4567@test.lindsaar.net>')
expect(m.name).to eq 'Content-ID'
expect(m.to_s).to eq '<1234@test.lindsaar.net>'
expect(m.content_id).to eq '1234@test.lindsaar.net'
end
it "should change the message id if given a new message id" do
m = Mail::ContentIdField.new('<1234@test.lindsaar.net>')
expect(m.to_s).to eq '<1234@test.lindsaar.net>'
m.value = '<4567@test.lindsaar.net>'
expect(m.to_s).to eq '<4567@test.lindsaar.net>'
end
end
describe "instance methods" do
it "should provide to_s" do
m = Mail::ContentIdField.new('<1234@test.lindsaar.net>')
expect(m.to_s).to eq '<1234@test.lindsaar.net>'
expect(m.content_id.to_s).to eq '1234@test.lindsaar.net'
end
it "should provide encoded" do
m = Mail::ContentIdField.new('<1234@test.lindsaar.net>')
expect(m.encoded).to eq "Content-ID: <1234@test.lindsaar.net>\r\n"
end
it "should respond to :responsible_for?" do
m = Mail::ContentIdField.new('<1234@test.lindsaar.net>')
expect(m).to respond_to(:responsible_for?)
end
end
describe "generating a message id" do
it "should generate a message ID if it has no value" do
m = Mail::ContentIdField.new
expect(Mail::Utilities.blank?(m.content_id)).not_to be_truthy
end
it "should generate a random message ID" do
m = Mail::ContentIdField.new
1.upto(100) do
expect(m.content_id).not_to eq(Mail::ContentIdField.new.content_id)
end
end
end
end
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