dont inject, stub the dependency using sinon

Author: soryy708

src/scc.js

@@ -5,17 +5,8 @@ import ExportMapBuilder from './exportMap/builder';
 import childContext from './exportMap/childContext';
 
 let cache = new Map();
-let exportMapBuilder = ExportMapBuilder;
 
 export default class StronglyConnectedComponentsBuilder {
-  static injectExportMapBuilder(value) {
-    exportMapBuilder = value;
-  }
-
-  static resetExportMapBuilder() {
-    exportMapBuilder = ExportMapBuilder;
-  }
-
   static clearCache() {
     cache = new Map();
   }
@@ -37,7 +28,7 @@ export default class StronglyConnectedComponentsBuilder {
   }
 
   static calculate(context) {
-    const exportMap = exportMapBuilder.for(context);
+    const exportMap = ExportMapBuilder.for(context);
     const adjacencyList = this.exportMapToAdjacencyList(exportMap);
     const calculatedScc = calculateScc(adjacencyList);
     return StronglyConnectedComponentsBuilder.calculatedSccToPlainObject(calculatedScc);

tests/src/scc.js

@@ -1,6 +1,7 @@
 import sinon from 'sinon';
 import { expect } from 'chai';
 import StronglyConnectedComponentsBuilder from '../../src/scc';
+import ExportMapBuilder from '../../src/exportMap/builder';
 
 function exportMapFixtureBuilder(path, imports) {
   return {
@@ -10,9 +11,7 @@ function exportMapFixtureBuilder(path, imports) {
 }
 
 describe('Strongly Connected Components Builder', () => {
-  const fakeExportMapBuilder = { for: sinon.spy() };
-  before(() => StronglyConnectedComponentsBuilder.injectExportMapBuilder(fakeExportMapBuilder));
-  after(() => StronglyConnectedComponentsBuilder.resetExportMapBuilder());
+  afterEach(() => ExportMapBuilder.for.restore());
   afterEach(() => StronglyConnectedComponentsBuilder.clearCache());
 
   describe('When getting an SCC', () => {
@@ -26,7 +25,7 @@ describe('Strongly Connected Components Builder', () => {
     describe('Given two files', () => {
       describe('When they don\'t cycle', () => {
         it('Should return foreign SCCs', () => {
-          fakeExportMapBuilder.for = sinon.stub().returns(
+          sinon.stub(ExportMapBuilder, 'for').returns(
             exportMapFixtureBuilder('foo.js', [exportMapFixtureBuilder('bar.js', [])]),
           );
           const actual = StronglyConnectedComponentsBuilder.for(source, context);
@@ -36,7 +35,7 @@ describe('Strongly Connected Components Builder', () => {
 
       describe('When they do cycle', () => {
         it('Should return same SCC', () => {
-          fakeExportMapBuilder.for = sinon.stub().returns(
+          sinon.stub(ExportMapBuilder, 'for').returns(
             exportMapFixtureBuilder('foo.js', [
               exportMapFixtureBuilder('bar.js', [
                 exportMapFixtureBuilder('foo.js', []),
@@ -53,7 +52,7 @@ describe('Strongly Connected Components Builder', () => {
       describe('When they form a line', () => {
         describe('When A -> B -> C', () => {
           it('Should return foreign SCCs', () => {
-            fakeExportMapBuilder.for = sinon.stub().returns(
+            sinon.stub(ExportMapBuilder, 'for').returns(
               exportMapFixtureBuilder('foo.js', [
                 exportMapFixtureBuilder('bar.js', [
                   exportMapFixtureBuilder('buzz.js', []),
@@ -67,7 +66,7 @@ describe('Strongly Connected Components Builder', () => {
 
         describe('When A -> B <-> C', () => {
           it('Should return 2 SCCs, A on its own', () => {
-            fakeExportMapBuilder.for = sinon.stub().returns(
+            sinon.stub(ExportMapBuilder, 'for').returns(
               exportMapFixtureBuilder('foo.js', [
                 exportMapFixtureBuilder('bar.js', [
                   exportMapFixtureBuilder('buzz.js', [
@@ -83,7 +82,7 @@ describe('Strongly Connected Components Builder', () => {
 
         describe('When A <-> B -> C', () => {
           it('Should return 2 SCCs, C on its own', () => {
-            fakeExportMapBuilder.for = sinon.stub().returns(
+            sinon.stub(ExportMapBuilder, 'for').returns(
               exportMapFixtureBuilder('foo.js', [
                 exportMapFixtureBuilder('bar.js', [
                   exportMapFixtureBuilder('buzz.js', []),
@@ -98,7 +97,7 @@ describe('Strongly Connected Components Builder', () => {
 
         describe('When A <-> B <-> C', () => {
           it('Should return same SCC', () => {
-            fakeExportMapBuilder.for = sinon.stub().returns(
+            sinon.stub(ExportMapBuilder, 'for').returns(
               exportMapFixtureBuilder('foo.js', [
                 exportMapFixtureBuilder('bar.js', [
                   exportMapFixtureBuilder('foo.js', []),
@@ -116,7 +115,7 @@ describe('Strongly Connected Components Builder', () => {
 
       describe('When they form a loop', () => {
         it('Should return same SCC', () => {
-          fakeExportMapBuilder.for = sinon.stub().returns(
+          sinon.stub(ExportMapBuilder, 'for').returns(
             exportMapFixtureBuilder('foo.js', [
               exportMapFixtureBuilder('bar.js', [
                 exportMapFixtureBuilder('buzz.js', [
@@ -132,7 +131,7 @@ describe('Strongly Connected Components Builder', () => {
 
       describe('When they form a Y', () => {
         it('Should return 3 distinct SCCs', () => {
-          fakeExportMapBuilder.for = sinon.stub().returns(
+          sinon.stub(ExportMapBuilder, 'for').returns(
             exportMapFixtureBuilder('foo.js', [
               exportMapFixtureBuilder('bar.js', []),
               exportMapFixtureBuilder('buzz.js', []),
@@ -145,7 +144,7 @@ describe('Strongly Connected Components Builder', () => {
 
       describe('When they form a Mercedes', () => {
         it('Should return 1 SCC', () => {
-          fakeExportMapBuilder.for = sinon.stub().returns(
+          sinon.stub(ExportMapBuilder, 'for').returns(
             exportMapFixtureBuilder('foo.js', [
               exportMapFixtureBuilder('bar.js', [
                 exportMapFixtureBuilder('foo.js', []),