Improving tests for PlotlyViaCdnModule

Author: andrefarzat

Diff for: devdocs.md

@@ -3,7 +3,7 @@
 * Update the version in package.json
 * Update the version in projects/plotly/package.json
 * Update the CHANGELOG.md
-* `ng test --codeCoverage=true --progress=true --watch=false`
+* `ng test --code-coverage=true --progress=true --watch=false`
 * `cp README.md angular-plotly.png projects/plotly`
 * `ng build plotly --configuration production`
 * `git commit -am "<version>"`

Diff for: projects/plotly/src/lib/plotly-via-cdn.module.spec.ts

@@ -33,4 +33,24 @@ describe('PlotlyViaCDNModule', () => {
         expect(fn).toThrowError(msg);
     });
 
+    describe(".setPlotlyVersion", () => {
+        it('should set Plotly version', () => {
+            const version = "latest";
+            spyOn(PlotlyViaCDNModule, "loadViaCDN");
+
+            PlotlyViaCDNModule.setPlotlyVersion(version);
+
+            expect(PlotlyViaCDNModule.loadViaCDN).toHaveBeenCalled();
+            expect((PlotlyViaCDNModule as any).plotlyVersion).toBe(version);
+        });
+
+        it('should NOT set Plotly version', () => {
+            const version = "invalid";
+            spyOn(PlotlyViaCDNModule, "loadViaCDN").and.callThrough();
+
+            expect(() => {
+                PlotlyViaCDNModule.setPlotlyVersion(version);
+            }).toThrowError("Invalid plotly version. Please set 'latest' or version number (i.e.: 1.4.3)");
+        });
+    });
 });