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resilient-mailer.js
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resilient-mailer.js
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var test = require('tape');
var ResilientMailer = require('../lib/resilient-mailer');
test('correct types exported', function (t) {
t.equal(typeof ResilientMailer, 'function');
t.equal(typeof ResilientMailer.prototype.registerProvider, 'function');
t.equal(typeof ResilientMailer.prototype.mail, 'function');
t.end();
});
test('correct types after initialization', function (t) {
var mailer = new ResilientMailer();
t.assert(mailer instanceof ResilientMailer);
t.equal(typeof mailer.registerProvider, 'function');
t.equal(typeof mailer.mail, 'function');
t.end();
});
test('uses providers in correct order', function (t) {
t.plan(3);
var mailer = new ResilientMailer();
mailer.registerProvider(successProvider);
mailer.registerProvider(failureProvider);
mailer.mail({}, function (error) {
t.equal(typeof error, 'undefined');
});
var mailer2 = new ResilientMailer();
mailer2.registerProvider(failureProvider);
mailer2.registerProvider(failureProvider2);
mailer2.mail({}, function (error) {
t.notEqual(typeof error, 'undefined');
t.equal(error.message, 'different generic failure');
});
});
test('uses secondary as backup', function (t) {
t.plan(1);
var mailer = new ResilientMailer();
mailer.registerProvider(failureProvider);
mailer.registerProvider(successProvider);
mailer.mail({}, function (error) {
t.equal(typeof error, 'undefined');
});
});
var successProvider = {
mail: function (message, callback) {
callback();
}
};
var failureProvider = {
mail: function (message, callback) {
callback(new Error('generic failure'));
}
};
var failureProvider2 = {
mail: function (message, callback) {
callback(new Error('different generic failure'));
}
};