Added tests to test the implemented method

Author: reinaldorauch

test/wrappers/example.zip

@@ -0,0 +1,47 @@
+import { tmpdir } from "os";
+import { assert } from "chai";
+import * as rimraf from "rimraf";
+
+import { FileSystem } from "../../lib/wrappers/file-system";
+
+describe('FileSystem', () => {
+    describe('extractZip', () => {
+        const d = new Date();
+        const datetime = [
+            d.getFullYear(),
+            d.getMonth() + 1,
+            d.getDate(),
+            d.getHours(),
+            d.getMinutes(),
+            d.getSeconds(),
+            d.getMilliseconds()
+        ].join('');
+        const tmpDir = `${tmpdir()}/${datetime}`;
+        const testFilePath = `${__dirname}/example.zip`;
+        const filesThatNeedToExtsit = [
+            `${tmpDir}/test/android-local-build-requirements.ts`,
+            `${tmpDir}/test/android-tools-info.ts`,
+            `${tmpDir}/test/ios-local-build-requirements.ts`,
+            `${tmpDir}/test/sys-info.ts`,
+            `${tmpDir}/test/wrappers/file-system.ts`
+        ];
+
+        it('should extract in example zip archive in tmp folder', done => {
+            const fs  = new FileSystem();
+
+            fs.extractZip(testFilePath, tmpDir)
+                .then(() => {
+                    const allExists = filesThatNeedToExtsit
+                        .map(fs.exists)
+                        .reduce((acc, r) => acc && r, true);
+
+                    assert.isTrue(allExists);
+
+                    done();
+                })
+                .catch(e => done(e));
+        });
+
+        afterEach(done => rimraf(tmpDir, done));
+    });
+});