class ChitterModel and tests

apiChitter.js

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+module.exports = ApiChitter;

apiChitter.test.js

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+const ApiChitter = require('./apiChitter');

chitterModel.js

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+class ChitterModel {
+  constructor() {
+    this.peeps = [];
+  }
+
+  getPeeps() {
+    return this.peeps;
+  }
+
+  addPeep(peep) {
+    this.peeps.push(peep);
+  }
+
+  setPeeps(peeps) {
+    this.peeps = peeps;
+  }
+}
+
+module.exports = ChitterModel;

chitterModel.test.js

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+const ChitterModel = require('./chitterModel');
+
+describe('ChitterModel', () => {
+  let model;
+
+  beforeEach(() => {
+    model = new ChitterModel();
+  });
+
+  it('returns a list of peeps', () => {
+    expect(model.getPeeps()).toEqual([]);
+  });
+
+  it('adds a peep to peeps list', () => {
+    model.addPeep('first peep');
+
+    expect(model.getPeeps()).toEqual(['first peep']);
+  });
+
+  it('sets peeps from peeps list', () => {
+    model.setPeeps(['first peep', 'second peep']);
+
+    expect(model.getPeeps()).toEqual(['first peep', 'second peep']);
+  });
+});

chitterView.js

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+module.exports = ChitterView;

chitterView.test.js

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+const ChitterView = require('./chitterView');

index.js

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+const ApiChitter = require('./apiChitter');
+const ChitterModel = require('./chitterModel');
+const ChitterView = require('./chitterView');
+
+const api = new ApiChitter();
+const model = new ChitterModel();
+const view = new ChitterView(model, api);
+
+console.log('Hello!');