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var expect = require("expect.js"),
__set__ = require("../lib/__set__.js"),
vm = require("vm"),
expectReferenceError = expectError(ReferenceError),
expectTypeError = expectError(TypeError);
function expectError(ErrConstructor) {
return function expectReferenceError(err) {
expect(err.constructor.name === ErrConstructor.name).to.be(true);
};
}
describe("__set__", function () {
var moduleFake;
beforeEach(function () {
moduleFake = {
myNumber: 0, // copy by value
myObj: {}, // copy by reference
// these variables are used within the set method
// because there is a eval() statement within the set method
// these variables should not override same-named vars of the module
key: "key",
env: "env",
src: "src"
};
vm.runInNewContext(
"__set__ = " + __set__.toString() + "; " +
"getNumber = function () { return myNumber; }; " +
"getObj = function () { return myObj; }; ",
moduleFake
);
});
it("should set the new number when calling with varName, varValue", function () {
expect(moduleFake.getNumber() === 0).to.be(true);
moduleFake.__set__("myNumber", 2);
expect(moduleFake.getNumber() === 2).to.be(true);
});
it("should set the new object when calling with varName, varValue", function () {
var newObj = { hello: "hello" };
expect(moduleFake.getObj()).to.eql({});
moduleFake.__set__("myObj", newObj);
expect(moduleFake.getObj() === newObj).to.be(true);
});
it("should set the new number and the new obj when calling with an env-obj", function () {
var newObj = { hello: "hello" };
expect(moduleFake.getNumber() === 0).to.be(true);
expect(moduleFake.getObj()).to.eql({});
moduleFake.__set__({
myNumber: 2,
myObj: newObj
});
expect(moduleFake.getNumber() === 2).to.be(true);
expect(moduleFake.getObj() === newObj).to.be(true);
});
it("should return undefined", function () {
expect(moduleFake.__set__("myNumber", 4) === undefined).to.be(true);
});
it("should throw a ReferenceError when trying to set non-existing vars", function () {
expect(function () {
moduleFake.__set__("notExisting", 3);
}).to.throwException();
expect(function () {
moduleFake.__set__({
notExisting: "bla",
notExistingAsWell: "blabla"
});
}).to.throwException(expectReferenceError);
});
it("should throw a TypeError when passing misfitting params", function () {
expect(function () {
moduleFake.__set__();
}).to.throwException(expectTypeError);
expect(function () {
moduleFake.__set__(undefined);
}).to.throwException(expectTypeError);
expect(function () {
moduleFake.__set__(null);
}).to.throwException(expectTypeError);
expect(function () {
moduleFake.__set__(true);
}).to.throwException(expectTypeError);
expect(function () {
moduleFake.__set__(2);
}).to.throwException(expectTypeError);
expect(function () {
moduleFake.__set__("");
}).to.throwException(expectTypeError);
expect(function () {
moduleFake.__set__(function () {});
}).to.throwException(expectTypeError);
expect(function () {
moduleFake.__set__({}, true); // misfitting number of params
}).to.throwException(expectTypeError);
expect(function () {
moduleFake.__set__("someVar"); // misfitting number of params
}).to.throwException(expectTypeError);
});
});
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