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must

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Testing and assertion library with friendly BDD syntax — awesome.must.be.true(). Many expressive matchers and is test runner and framework agnostic. Follows RFC 2119 with its use of MUST. Good and well tested stuff.

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var Must = require("../..") var assert = require("./assert") describe("Must.prototype.array", function() { it("must pass given array", function() { assert.pass(function() { Must([]).be.array() }) }) it("must fail given null", function() { assert.fail(function() { Must(null).be.array() }) }) it("must fail given undefined", function() { assert.fail(function() { Must(undefined).be.array() }) }) it("must fail given boolean primitive", function() { assert.fail(function() { Must(true).be.array() }) assert.fail(function() { Must(false).be.array() }) }) it("must fail given number primitive", function() { assert.fail(function() { Must(0).be.array() }) }) it("must fail given string primitive", function() { assert.fail(function() { Must("").be.array() }) }) it("must fail given object", function() { assert.fail(function() { Must({}).be.array() }) }) require("./_assertion_error_test")(function() { Must(42).be.array() }, { actual: 42, message: "42 must be an array" }) describe(".not", function() { it("must invert the assertion", function() { assert.fail(function() { Must([]).not.be.array() }) }) }) })