integration tests

integration/integration.test.js

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+import requirey from '../src/index';
+
+const config = {
+  lodash: ['1.3.1', '2.4.2', '3.10.1']
+};
+
+describe('requirey - integration', () => {
+  let ry;
+  beforeAll(() => {
+    ry = requirey(config);
+  });
+
+  it('should install all and be requireable', () => {
+    ry.installAll();
+    let requirer = new ry.Requirer();
+    let a = requirer.require('lodash@1.3.1');
+    let b = requirer.require('lodash@2.4.2');
+    let c = requirer.require('lodash@3.10.1');
+
+    expect(a).toBeTruthy();
+    expect(b).toBeTruthy();
+    expect(c).toBeTruthy();
+  });
+
+  it('should fetch correct version', () => {
+    let requirer = new ry.Requirer();
+    let a = requirer.require('lodash@1.3.1');
+    expect(a.drop).toBeTruthy(); //for 1.x
+    expect(a.findLastIndex).toBeFalsy(); //for 2.x
+    expect(a.chunk).toBeFalsy(); //for 3.x
+
+    let b = requirer.require('lodash@2.4.2');
+    expect(b.drop).toBeTruthy(); //for 1.x
+    expect(b.findLastIndex).toBeTruthy(); //for 2.x
+    expect(b.chunk).toBeFalsy(); //for 3.x
+
+    let c = requirer.require('lodash@3.10.1');
+    expect(c.drop).toBeTruthy(); //for 1.x
+    expect(c.findLastIndex).toBeTruthy(); //for 2.x
+    expect(c.chunk).toBeTruthy(); //for 3.x
+  });
+
+  it('should find correct version intelligently', () => {
+    let requirer_1 = new ry.Requirer({
+      dependencies: {
+        lodash: '^3.0.0'
+      }
+    });
+
+    let a = requirer_1.require('lodash');
+    expect(a.chunk).toBeTruthy();
+
+    let requirer_2 = new ry.Requirer({
+      dependencies: {
+        lodash: '^2.0.0'
+      }
+    });
+
+    let b = requirer_2.require('lodash');
+    expect(b.chunk).toBeFalsy();
+    expect(b.findLastIndex).toBeTruthy();
+  });
+});