gmail-tester-extended

A simple Node.js Gmail client which checks/returns email message(s) straight from any Gmail-powered account (both private and company). There are two main functionalities this library provides:

1. check_inbox(): Polls a mailbox for a given amount of time. At the end of the operation, the desired message is returned (if found).
2. get_messages(): Can be used to perform various assertions on the email objects (see example below).
3. reply_email(): Can be used to perform various assertions on the email objects.

P.S, I have written a story on medium, how using Cypress, we are testing our user registration process at Tastewise.

Usage

1. Install using npm:

npm install --save-dev gmail-tester-extended

2. Save the Google Cloud Platform OAuth2 Authentication file named credentials.json inside an accessible directory (see instructions below).
3. In terminal, run the following command:

node <node_modules>/gmail-tester-extended/init.js <path-to-credentials.json> <path-to-token.json> <target-email>

<path-to-credentials.json> Is the path to OAuth2 Authentication file. <path-to-token.json> Is the path to OAuth2 token. If it doesn't exist, the script will create it. The script will prompt you to go to google.com to activate a token. Go to the given link, and select the account for <target-email>. Grant permission to view your email messages and settings. At the end of the process you should see the token:

Hit the copy button and paste it to init.js script. The process should look like this:

How to get credentials.json?

1. Follow the instructions to Create a client ID and client secret.
2. Once done, go to https://console.cloud.google.com/apis/credentials?project=(project-name)&folder&organizationId and download the OAuth2 credentials file, as shown in the image below. Make sure to replace (project-name) with your project name.

The credentials.json file should look like this:

If everything is done right, the last output from the script should be

[gmail] Found!

3. Congratulations! gmail-tester-extended is ready to use.

API

get_messages(credentials_json, token_path, options)

credentials_json: Path to credentials JSON file. token_path: Path to OAuth2 token file. options:

• from: String. Filter on the email address of the receiver.
• to: String. Filter on the email address of the sender.
• subject: String. Filter on the subject of the email.
• include_body: boolean. Set to true to fetch decoded email bodies.
• before: Date. Filter messages received after the specified date.
• after: Date. Filter messages received before the specified date.

Returns: An array of email objects with the following fields:

[
  {
    from: "Human Friendly Name <sender@email-address>",
    receiver: "your@email-address",
    subject: "string",
    body: {
      html: "string",
      text: "string"
    }
  }
  // ...
];

Some senders will send you text/html content, the others will send you plain/text, and some will send you both. Make sure you are looking for the content in the right body field.

check_inbox(credentials_json, token_path, options = {})

credentials_json: Path to credentials JSON file. token_path: Path to OAuth2 token file. options:

• from: String. Filter on the email address of the receiver.
• to: String. Filter on the email address of the sender.
• subject: String. Filter on the subject of the email.
• include_body: boolean. Set to true to fetch decoded email bodies.
• before: Date. Filter messages received after the specified date.
• after: Date. Filter messages received before the specified date.
• wait_time_sec: Integer. Interval between inbox checks (in seconds). Default: 30 seconds.
• max_wait_time_sec: Integer. Maximum wait time (in seconds). When reached and the email was not found, the script exits. Default: 60 seconds.

Returns: An array of email objects with the following fields:

[
  {
    from: "Human Friendly Name <sender@email-address>",
    receiver: "your@email-address",
    subject: "string",
    body: {
      html: "string",
      text: "string"
    }
  }
  // ...
];

In addition, verbose messages will be written to console.

Example

Using check_inbox() to look for a specific message:

const path = require("path");
const gmail = require("gmail-tester-extended");
const email = await gmail.check_inbox(
  path.resolve(__dirname, "credentials.json"), // Assuming credentials.json is in the current directory.
  path.resolve(__dirname, "gmail_token.json"), // Look for gmail_token.json in the current directory (if it doesn't exists, it will be created by the script).
  "Activate Your Account", // We are looking for 'Activate Your Account' in the subject of the message.
  "[email protected]", // We are looking for a sender header which is '[email protected]'.
  "<target-email>", // Which inbox to poll. credentials.json should contain the credentials to it.
  10, // Poll interval (in seconds).
  30, // Maximum poll time (in seconds), after which we'll giveup.
  { include_body: true } // If we want to include the body of messages (optional)
);
if (email) {
  console.log("Email was found!");
} else {
  console.log("Email was not found!");
}

Using get_messages() to assert email body using Cypress

examples\cypress\plugins\index.js:

/// <reference types="Cypress" />
const debug = require("debug");
const path = require("path");
const gmail_tester = require("../../../../../gmail-tester-extended");

module.exports = (on, config) => {
  on("before:browser:launch", (browser = {}, args) => {
    if (browser.name === "chrome") {
      args.push("--remote-debugging-port=9221");
      return args;
    }
  });
  on("task", {
    "gmail:get-messages": async args => {
      const messages = await gmail_tester.get_messages(
        path.resolve(__dirname, "credentials.json"),
        path.resolve(__dirname, "token.json"),
        args.options
      );
      return messages;
    }
  });
};

examples\cypress\integration\gmail.spec.js:

/// <reference types="Cypress" />

describe("Email assertion:", () => {
  it("Look for an email with specific subject and link in email body", function() {
    // debugger; //Uncomment for debugger to work...
    cy
      .task("gmail:get-messages", {
        options: {
          from: "[email protected]",
          subject: "Ubisoft Password Change Request",
          include_body: true,
          before: new Date(2019, 8, 24, 12, 31, 13), // Before September 24rd, 2019 12:31:13
          after: new Date(2019, 7, 23) // After August 23, 2019
        }
      })
      .then(emails => {
        assert.isAtLeast(
          emails.length,
          1,
          "Expected to find at least one email, but none were found!"
        );
        const body = emails[0].body.html;
        assert.isTrue(
          body.indexOf(
            "https://account-uplay.ubi.com/en-GB/action/change-password?genomeid="
          ) >= 0,
          "Found reset link!"
        );
      });
  });
});

Contributing

Please feel free to contribute to this project.

Credits

• Built using googleapis.