1 files changed, 91 insertions, 0 deletions
diff --git a/actionmailbox/test/controllers/ingresses/mailgun/inbound_emails_controller_test.rb b/actionmailbox/test/controllers/ingresses/mailgun/inbound_emails_controller_test.rb
new file mode 100644
index 0000000000..3f225b8953
--- /dev/null
+++ b/actionmailbox/test/controllers/ingresses/mailgun/inbound_emails_controller_test.rb
@@ -0,0 +1,91 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+ENV["MAILGUN_INGRESS_API_KEY"] = "tbsy84uSV1Kt3ZJZELY2TmShPRs91E3yL4tzf96297vBCkDWgL"
+
+class ActionMailbox::Ingresses::Mailgun::InboundEmailsControllerTest < ActionDispatch::IntegrationTest
+  setup { ActionMailbox.ingress = :mailgun }
+
+  test "receiving an inbound email from Mailgun" do
+    assert_difference -> { ActionMailbox::InboundEmail.count }, +1 do
+      travel_to "2018-10-09 15:15:00 EDT"
+      post rails_mailgun_inbound_emails_url, params: {
+        timestamp: 1539112500,
+        token: "7VwW7k6Ak7zcTwoSoNm7aTtbk1g67MKAnsYLfUB7PdszbgR5Xi",
+        signature: "ef24c5225322217bb065b80bb54eb4f9206d764e3e16abab07f0a64d1cf477cc",
+        "body-mime" => file_fixture("../files/welcome.eml").read
+      }
+    end
+
+    assert_response :no_content
+
+    inbound_email = ActionMailbox::InboundEmail.last
+    assert_equal file_fixture("../files/welcome.eml").read, inbound_email.raw_email.download
+    assert_equal "0CB459E0-0336-41DA-BC88-E6E28C697DDB@37signals.com", inbound_email.message_id
+  end
+
+  test "rejecting a delayed inbound email from Mailgun" do
+    assert_no_difference -> { ActionMailbox::InboundEmail.count } do
+      travel_to "2018-10-09 15:26:00 EDT"
+      post rails_mailgun_inbound_emails_url, params: {
+        timestamp: 1539112500,
+        token: "7VwW7k6Ak7zcTwoSoNm7aTtbk1g67MKAnsYLfUB7PdszbgR5Xi",
+        signature: "ef24c5225322217bb065b80bb54eb4f9206d764e3e16abab07f0a64d1cf477cc",
+        "body-mime" => file_fixture("../files/welcome.eml").read
+      }
+    end
+
+    assert_response :unauthorized
+  end
+
+  test "rejecting a forged inbound email from Mailgun" do
+    assert_no_difference -> { ActionMailbox::InboundEmail.count } do
+      travel_to "2018-10-09 15:15:00 EDT"
+      post rails_mailgun_inbound_emails_url, params: {
+        timestamp: 1539112500,
+        token: "Zx8mJBiGmiiyyfWnho3zKyjCg2pxLARoCuBM7X9AKCioShGiMX",
+        signature: "ef24c5225322217bb065b80bb54eb4f9206d764e3e16abab07f0a64d1cf477cc",
+        "body-mime" => file_fixture("../files/welcome.eml").read
+      }
+    end
+
+    assert_response :unauthorized
+  end
+
+  test "raising when the configured Mailgun API key is nil" do
+    switch_key_to nil do
+      assert_raises ArgumentError do
+        travel_to "2018-10-09 15:15:00 EDT"
+        post rails_mailgun_inbound_emails_url, params: {
+          timestamp: 1539112500,
+          token: "7VwW7k6Ak7zcTwoSoNm7aTtbk1g67MKAnsYLfUB7PdszbgR5Xi",
+          signature: "ef24c5225322217bb065b80bb54eb4f9206d764e3e16abab07f0a64d1cf477cc",
+          "body-mime" => file_fixture("../files/welcome.eml").read
+        }
+      end
+    end
+  end
+
+  test "raising when the configured Mailgun API key is blank" do
+    switch_key_to "" do
+      assert_raises ArgumentError do
+        travel_to "2018-10-09 15:15:00 EDT"
+        post rails_mailgun_inbound_emails_url, params: {
+          timestamp: 1539112500,
+          token: "7VwW7k6Ak7zcTwoSoNm7aTtbk1g67MKAnsYLfUB7PdszbgR5Xi",
+          signature: "ef24c5225322217bb065b80bb54eb4f9206d764e3e16abab07f0a64d1cf477cc",
+          "body-mime" => file_fixture("../files/welcome.eml").read
+        }
+      end
+    end
+  end
+
+  private
+    def switch_key_to(new_key)
+      previous_key, ENV["MAILGUN_INGRESS_API_KEY"] = ENV["MAILGUN_INGRESS_API_KEY"], new_key
+      yield
+    ensure
+      ENV["MAILGUN_INGRESS_API_KEY"] = previous_key
+    end
+end