💚 add unit tests for lib/to-promise.ts

Author: Ammar Dodin

test/unit/test.toPromise.js

@@ -0,0 +1,34 @@
+const toPromise = require('../../lib/to-promise');
+const stream = require('stream');
+const fs = require('fs');
+const assert = require('assert');
+const path = require('path');
+
+describe('toPromise()', () => {
+  it('should resolve with results buffer as a string', () => {
+    const file = fs.createReadStream(
+      path.join(__dirname, '../resources/weather_data_train.csv')
+    );
+    toPromise(file)
+      .then(res => {
+        assert(typeof res === 'string');
+      })
+      .catch(err => {
+        console.log(err);
+        assert(false);
+      });
+  });
+  it('should resolve with results string as an array', () => {
+    const file = fs.createReadStream(
+      path.join(__dirname, '../resources/weather_data_train.csv')
+    );
+    file.setEncoding('utf-8');
+    toPromise(file)
+      .then(res => {
+        assert(res instanceof Array);
+      })
+      .catch(err => {
+        assert(false);
+      });
+  });
+});