Adding index_test.js to sentiment model (#649)

* Adding tests for sentiment.

* Removing unnecessary console.log.

* Removing unnecessary console.log.

* remove inappropriate word.

Author: t111

src/Sentiment/index.js

@@ -42,7 +42,6 @@ class Sentiment {
    * @param {function} callback - Optional. A callback function that is called once the model has loaded. If no callback is provided, it will return a promise that will be resolved once the model has loaded.
    */
   constructor(modelName, callback) {
-    console.log('constructor');
     /**
      * Boolean value that specifies if the model has loaded.
      * @type {boolean}

src/Sentiment/index_test.js

@@ -0,0 +1,20 @@
+const { sentiment } = ml5;
+
+describe('Sentiment', ()=>{
+  let model;
+
+  beforeAll(async () => {
+    jasmine.DEFAULT_TIMEOUT_INTERVAL = 10000;
+    model = await sentiment('moviereviews').ready;
+  });
+
+  it("Model should be ready",()=> expect(model.ready).toBeTruthy());
+
+  it("Happy has a sentiment score greater than 0.5", ()=>{
+    expect(model.predict('Happy').score).toBeGreaterThan(0.5);
+  });
+
+  it("Terrible has a sentiment score less than 0.5", ()=>{
+    expect(model.predict('Terrible').score).toBeLessThan(0.5);
+  });
+});