test: bump test-runner, improve coverage

vaadin/vaadin-progress-bar#76

Author: web-padawan

packages/vaadin-progress-bar/package.json

@@ -65,8 +65,8 @@
     "@open-wc/rollup-plugin-html": "^1.2.5",
     "@open-wc/testing-helpers": "^1.8.12",
     "@polymer/iron-component-page": "^4.0.0",
-    "@web/dev-server": "^0.1.4",
-    "@web/test-runner": "^0.12.2",
+    "@web/dev-server": "^0.1.5",
+    "@web/test-runner": "^0.12.6",
     "@web/test-runner-saucelabs": "^0.4.0",
     "eslint": "^7.15.0",
     "eslint-config-prettier": "^6.15.0",

packages/vaadin-progress-bar/test/progress-bar.test.js

@@ -10,6 +10,10 @@ describe('progress bar', () => {
     value = progress.shadowRoot.querySelector('[part="value"]');
   });
 
+  it('should have a valid version number', () => {
+    expect(progress.constructor.version).to.match(/^(\d+\.)?(\d+\.)?(\d+)(-(alpha|beta)\d+)?$/);
+  });
+
   it('should have proper scale', () => {
     progress.value = 0.1;
     expect(value.getBoundingClientRect().width / progress.offsetWidth).to.be.closeTo(0.1, 0.002);
@@ -47,6 +51,12 @@ describe('progress bar', () => {
     expect(getComputedStyle(progress).getPropertyValue('--vaadin-progress-value')).to.be.equal('0');
   });
 
+  it('should set normalized value to 0.5 if the value is 0 and min is -1', () => {
+    progress.min = -1;
+    progress.value = 0;
+    expect(getComputedStyle(progress).getPropertyValue('--vaadin-progress-value')).to.be.equal('0.5');
+  });
+
   it('should clamp normalized value between 0 and 1', () => {
     progress.value = -1;
     expect(getComputedStyle(progress).getPropertyValue('--vaadin-progress-value')).to.be.equal('0');