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test.js
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test.js
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"use strict";
var expect = require("chai").expect;
var FNStack = require("./");
describe("fn-stack", function() {
beforeEach(function() {
this.stack = new FNStack();
});
it("should asynchronously run all functions in the stack", function(done) {
var callback = function callback(err, result) {
if (err) {
throw err;
}
expect(err).to.be.a("null");
expect(result).to.be.a("boolean");
expect(result).to.equal(true);
done();
};
this.stack.use(function(value, next) {
process.nextTick(function() {
expect(value).to.be.a("boolean");
expect(value).to.equal(true);
next(null);
});
});
this.stack.run([true], callback);
});
it("should add only on callback function", function(done) {
this.stack.use(function(value, next) {
expect(value).to.be.a("string");
expect(value).to.equal("foo");
next(null);
});
this.stack.use(function(value, next) {
expect(arguments.length).to.equal(2);
next(null);
});
this.stack.run(["foo"], function callback(err) {
if (err) {
throw err;
}
expect(err).to.be.a("null");
done();
});
});
it("should not depend on arguments passed to #run", function(done) {
var callback = function callback(err) {
if (err) {
throw err;
}
expect(err).to.be.a("null");
done();
};
this.stack.use(function(next) {
expect(arguments.length).to.equal(1);
next(null);
});
this.stack.run(callback);
});
describe("#context", function() {
it("should bind middleware to the given context", function(done) {
var context = {
hello: "world"
};
this.stack.context(context);
this.stack.use(function(next) {
expect(this.hello).to.be.ok;
expect(this.hello).to.equal(context.hello);
next(null);
});
this.stack.run(function onDone(err) {
if (err) {
throw err;
}
expect(err).to.be.a("null");
done();
});
});
it("should bind the callback to context", function(done) {
var ctx = {
hello: "world"
};
this.stack.context(ctx);
this.stack.use(function(next) {
process.nextTick(next);
});
this.stack.run(function() {
expect(this).to.have.property("hello");
expect(this.hello).to.equal("world");
done();
});
});
});
});