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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(".prototype.least", function() { it("must pass if above", function() { assert.pass(function() { Must(69).be.at.least(42) }) }) it("must pass if equal", function() { assert.pass(function() { Must(69).be.at.least(69) }) }) it("must fail if below", function() { assert.fail(function() { Must(69).be.at.least(1337) }) }) require("./_assertion_error_test")(function() { Must(42).be.at.least(69) }, { actual: 42, expected: 69, message: "42 must be at least 69" }) describe(".not", function() { it("must invert the assertion", function() { assert.fail(function() { Must(69).not.be.at.least(42) }) }) }) })