feat(chromatogram): add deleteSerieByName

closes #17

src/Chromatogram.js

@@ -40,6 +40,18 @@ class Chromatogram {
         return this.series[name];
     }
 
+    /**
+     * Delete a serie
+     * @param {string} name - Name of the serie
+     */
+    deleteSerieByName(name) {
+        if (!this.findSerieByName(name)) {
+            throw new Error(`a serie with name ${name} doesn't exists`);
+        } else {
+            delete this.series[name];
+        }
+    }
+
     /**
      * Add a new serie
      * @param {object} serie - Object with an array of data, dimensions of the elements in the array and name of the serie

test/chromatogram.js

@@ -21,8 +21,23 @@ test('addSerie errors', t => {
     t.throws(() => chrom.addSerie({dimension: 1, name: 'a'}), 'serie must have a data array');
 });
 
-test('addSerie errors', t => {
+test('get first and last time', t => {
     let chrom = new Chromatogram([1, 2, 3]);
     t.is(chrom.getFirstTime(), 1);
     t.is(chrom.getLastTime(), 3);
 });
+
+test('deleteSerieByName', t => {
+    let chrom = new Chromatogram({
+        times: [1, 2],
+        series: [{
+            name: 'tic',
+            dimension: 1,
+            data: [1, 2]
+        }]
+    });
+    t.throws(() => chrom.deleteSerieByName('ms'), 'a serie with name ms doesn\'t exists');
+
+    chrom.deleteSerieByName('tic');
+    t.is(chrom.findSerieByName('tic'), undefined);
+});