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314 lines (270 loc) · 9.45 KB
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/* globals describe, it, beforeEach */
"use strict";
require("should");
const sinon = require("sinon");
const ExternalModule = require("../lib/ExternalModule");
const OriginalSource = require("webpack-sources").OriginalSource;
const RawSource = require("webpack-sources").RawSource;
describe("ExternalModule", function() {
let externalModule;
let request;
let type;
beforeEach(function() {
request = "some/request";
type = "some-type";
externalModule = new ExternalModule(
request,
type
);
});
describe("#identifier", function() {
it("returns an identifier for this module", function() {
const expected = `external "${request}"`;
externalModule.identifier().should.eql(expected);
});
});
describe("#readableIdentifier", function() {
it("returns an identifier for this module", function() {
const expected = `external "${request}"`;
externalModule.identifier().should.eql(expected);
});
});
describe("#needRebuild", function() {
it("always returns false", function() {
externalModule.needRebuild().should.eql(false);
});
});
describe("#size", function() {
it("always returns 42", function() {
externalModule.size().should.eql(42);
});
});
describe("#source", function() {
it("calls getSource with the result of getSourceString", function() {
// set up
const expectedString = "something expected stringy";
const expectedSource = "something expected sourcy";
externalModule.getSource = sinon.stub().returns(expectedSource);
externalModule.getSourceString = sinon.stub().returns(expectedString);
// invoke
const result = externalModule.source();
// check
externalModule.getSource.callCount.should.eql(1);
externalModule.getSourceString.callCount.should.eql(1);
externalModule.getSource.args[0][0].should.eql(expectedString);
result.should.eql(expectedSource);
});
});
describe("#getSource", function() {
describe("given it should use source maps", function() {
beforeEach(function() {
externalModule.useSourceMap = true;
});
it("returns an instance of OriginalSource", function() {
// set up
const someSourceString = "some source string";
// invoke
const result = externalModule.getSource(someSourceString);
// check
result.should.be.instanceOf(OriginalSource);
});
});
describe("given it does not use source maps", function() {
beforeEach(function() {
externalModule.useSourceMap = false;
});
it("returns an instance of RawSource", function() {
// set up
const someSourceString = "some source string";
// invoke
const result = externalModule.getSource(someSourceString);
// check
result.should.be.instanceOf(RawSource);
});
});
});
describe("#getSourceForGlobalVariableExternal", function() {
describe("given an array as variable name in the global namespace", function() {
it("use the array as lookup in the global object", function() {
// set up
const type = "window";
const varName = ["foo", "bar"];
const expected = "(function() { module.exports = window[\"foo\"][\"bar\"]; }());";
// invoke
const result = externalModule.getSourceForGlobalVariableExternal(varName, type);
// check
result.should.eql(expected);
});
});
describe("given an single variable name", function() {
it("look it up in the global namespace", function() {
// set up
const type = "window";
const varName = "foo";
const expected = "(function() { module.exports = window[\"foo\"]; }());";
// invoke
const result = externalModule.getSourceForGlobalVariableExternal(varName, type);
// check
result.should.eql(expected);
});
});
});
describe("#getSourceForCommonJsExternal", function() {
describe("given an array as names in the global namespace", function() {
it("use the first to require a module and the rest as lookup on the required module", function() {
// set up
const varName = ["module", "look", "up"];
const expected = "module.exports = require(module)[\"look\"][\"up\"];";
// invoke
const result = externalModule.getSourceForCommonJsExternal(varName, type);
// check
result.should.eql(expected);
});
});
describe("given an single variable name", function() {
it("require a module with that name", function() {
// set up
const type = "window";
const varName = "foo";
const expected = "module.exports = require(\"foo\");";
// invoke
const result = externalModule.getSourceForCommonJsExternal(varName, type);
// check
result.should.eql(expected);
});
});
});
describe("#checkExternalVariable", function() {
it("creates a check that fails if a variable does not exist", function() {
// set up
const variableToCheck = "foo";
const request = "bar";
const expected = `if(typeof foo === 'undefined') {var e = new Error(\"Cannot find module \\\"bar\\\"\"); e.code = 'MODULE_NOT_FOUND'; throw e;}
`;
// invoke
const result = externalModule.checkExternalVariable(variableToCheck, request);
// check
result.should.eql(expected);
});
});
describe("#getSourceForAmdOrUmdExternal", function() {
it("looks up a global variable as specified by the id", function() {
// set up
const id = "someId";
const optional = false;
const expected = "module.exports = __WEBPACK_EXTERNAL_MODULE_someId__;";
// invoke
const result = externalModule.getSourceForAmdOrUmdExternal(id, optional, request);
// check
result.should.eql(expected);
});
describe("given an optinal check is set", function() {
it("ads a check for the existance of the variable before looking it up", function() {
// set up
const id = "someId";
const optional = true;
const expected = `if(typeof __WEBPACK_EXTERNAL_MODULE_someId__ === 'undefined') {var e = new Error("Cannot find module \\"some/request\\""); e.code = 'MODULE_NOT_FOUND'; throw e;}
module.exports = __WEBPACK_EXTERNAL_MODULE_someId__;`;
// invoke
const result = externalModule.getSourceForAmdOrUmdExternal(id, optional, request);
// check
result.should.eql(expected);
});
});
});
describe("#getSourceForDefaultCase", function() {
it("returns the given request as lookup", function() {
// set up
const optional = false;
const expected = "module.exports = some/request;";
// invoke
const result = externalModule.getSourceForDefaultCase(optional, request);
// check
result.should.eql(expected);
});
describe("given an optinal check is requested", function() {
it("checks for the existance of the request setting it", function() {
// set up
const optional = true;
const expected = `if(typeof some/request === 'undefined') {var e = new Error("Cannot find module \\"some/request\\""); e.code = 'MODULE_NOT_FOUND'; throw e;}
module.exports = some/request;`;
// invoke
const result = externalModule.getSourceForDefaultCase(optional, request);
// check
result.should.eql(expected);
});
});
});
describe("#getSourceString", function() {
let globalExternalStub;
let globalCommonJsStub;
let globalAmdOrUmdStub;
let defaultExternalStub;
beforeEach(function() {
globalExternalStub = externalModule.getSourceForGlobalVariableExternal = sinon.stub();
globalCommonJsStub = externalModule.getSourceForCommonJsExternal = sinon.stub();
globalAmdOrUmdStub = externalModule.getSourceForAmdOrUmdExternal = sinon.stub();
defaultExternalStub = externalModule.getSourceForDefaultCase = sinon.stub();
});
describe("with type being 'this', 'window' or 'global'", function() {
it("deletgates to #getSourceForGlobalVariableExternal", function() {
["this", "window", "global"].forEach((type, i) => {
// set up
externalModule.type = type;
// invoke
externalModule.getSourceString();
// check
globalExternalStub.callCount.should.eql(i + 1);
globalCommonJsStub.callCount.should.eql(0);
globalAmdOrUmdStub.callCount.should.eql(0);
defaultExternalStub.callCount.should.eql(0);
});
});
});
describe("with type being 'commonjs' or 'commonjs2'", function() {
it("deletgates to #getSourceForCommonJsExternal", function() {
["commonjs", "commonjs2"].forEach((type, i) => {
// set up
externalModule.type = type;
// invoke
externalModule.getSourceString();
// check
globalExternalStub.callCount.should.eql(0);
globalCommonJsStub.callCount.should.eql(i + 1);
globalAmdOrUmdStub.callCount.should.eql(0);
defaultExternalStub.callCount.should.eql(0);
});
});
});
describe("with type being 'amd', 'umd' or 'umd2'", function() {
it("deletgates to #getSourceForAmdOrUmdExternal", function() {
["amd", "umd", "umd2"].forEach((type, i) => {
// set up
externalModule.type = type;
// invoke
externalModule.getSourceString();
// check
globalExternalStub.callCount.should.eql(0);
globalCommonJsStub.callCount.should.eql(0);
globalAmdOrUmdStub.callCount.should.eql(i + 1);
defaultExternalStub.callCount.should.eql(0);
});
});
});
describe("with type being non of the above", function() {
it("deletgates to #getSourceForGlobalVariableExternal", function() {
["foo", "bar", undefined].forEach((type, i) => {
// set up
externalModule.type = type;
// invoke
externalModule.getSourceString();
// check
globalExternalStub.callCount.should.eql(0);
globalCommonJsStub.callCount.should.eql(0);
globalAmdOrUmdStub.callCount.should.eql(0);
defaultExternalStub.callCount.should.eql(i + 1);
});
});
});
});
});