test(ngx-material-password-strength): added first tests

Author: AnthonyNahas

src/module/component/password-strength/password-strength.component.spec.ts

@@ -1,7 +1,8 @@
 import {async, ComponentFixture, TestBed} from '@angular/core/testing';
 
-import {PasswordStrengthComponent} from './password-strength.component';
+import {Colors, PasswordStrengthComponent} from './password-strength.component';
 import {MatProgressBarModule} from '@angular/material';
+import {SimpleChange} from '@angular/core';
 
 describe('PasswordStrengthComponent', () => {
   let component: PasswordStrengthComponent;
@@ -24,4 +25,60 @@ describe('PasswordStrengthComponent', () => {
   it('should create', () => {
     expect(component).toBeTruthy();
   });
+
+  it('should have a password input', () => {
+    expect(component.password).toBeUndefined();
+  });
+
+  it('should have a primary color and strength equal to 0 when no password is provided', () => {
+    expect(component.color).toBe(Colors.primary);
+    expect(component.strength).toBe(0);
+  });
+
+  it('should not calculate the strength of the password', () => {
+    const calculatePasswordStrengthSpy = jest.spyOn(component, 'calculatePasswordStrength');
+    component.password = 'testPass';
+    component.externalError = true;
+    component.ngOnChanges({
+      password: new SimpleChange(null, component.password, true),
+      externalError: new SimpleChange(null, component.externalError, true)
+    });
+    fixture.detectChanges();
+    expect(calculatePasswordStrengthSpy).not.toHaveBeenCalled();
+  });
+
+  it('should calculate the strength of the password', () => {
+    const calculatePasswordStrengthSpy = jest.spyOn(component, 'calculatePasswordStrength');
+    component.password = 'testPass2';
+    component.externalError = true;
+    component.ngOnChanges({
+      password: new SimpleChange('testPass', component.password, false),
+    });
+    fixture.detectChanges();
+    expect(calculatePasswordStrengthSpy).toHaveBeenCalled();
+  });
+
+  it('should strength = 20 and color = warn when the password only contain one char ', () => {
+    const testChars = ['A', '1', 'a', '.'];
+    testChars.forEach(char => {
+      component.password = char;
+      console.log('char = ', char);
+      component.calculatePasswordStrength();
+      expect(component.strength).toBe(20);
+      expect(component.color).toBe(Colors.warn);
+    });
+  });
+
+  it('should strength = 40 and color = warn when the password fulfills 2 criteria ', () => {
+    const combinations = ['Aa', 'aA', '1a', 'A!'];
+    // const combinations = generator(chars, 2, 3);
+    console.log('combinations = ', combinations);
+    combinations.forEach(combination => {
+      component.password = combination;
+      console.log('combination = ', combination);
+      component.calculatePasswordStrength();
+      expect(component.strength).toBe(40);
+      expect(component.color).toBe(Colors.accent);
+    });
+  });
 });