test: css validation unit tests

Author: abose

test/test-css.worker.js

@@ -96,11 +96,42 @@ describe(`web worker CSS Language tests`, async function () {
      * zeroUnits: "warning"
      * emptyRules: "warning"
      * unknownProperties: "warning"
+     * ieHack: "warning"
      * // leave default
      * importStatement: none
      * boxModel: none
      */
 
+    it("should validate css ieHack", async function () {
+        const cssValidationData = await (await fetch("test-files/cssValidationData.json")).json();
+        messageFromWorker = null;
+        const text = `.myClass {
+            color: blue; /* For modern browsers */
+            _color: red; /* This color is only for IE 6 and below */
+        }`;
+        worker.postMessage({
+            command: `validateCSS`, text, cssMode: "CSS", filePath: "file:///c.css", lintSettings: {
+                ieHack: "warning"
+            }
+        });
+        let output = await waitForWorkerMessage(`validateCSS`, 1000);
+        const symbols = output.diag;
+        expect(symbols).to.deep.equal(cssValidationData["ieHack"]);
+    });
+
+    it("should validate css ieHack by default", async function () {
+        messageFromWorker = null;
+        const text = `.myClass {
+            color: blue; /* For modern browsers */
+            _color: red; /* This color is only for IE 6 and below */
+        }`;
+        worker.postMessage({
+            command: `validateCSS`, text, cssMode: "CSS", filePath: "file:///c.css"});
+        let output = await waitForWorkerMessage(`validateCSS`, 1000);
+        const symbols = output.diag;
+        expect(symbols).to.deep.equal([]);
+    });
+
     it("should validate css unknownProperties", async function () {
         const cssValidationData = await (await fetch("test-files/cssValidationData.json")).json();
         messageFromWorker = null;

test/test-files/cssValidationData.json

@@ -139,5 +139,21 @@
         "character": 23
       }
     }
+  }],
+  "ieHack": [{
+    "code": "ieHack",
+    "source": "css",
+    "message": "IE hacks are only necessary when supporting IE7 and older",
+    "severity": 2,
+    "range": {
+      "start": {
+        "line": 2,
+        "character": 12
+      },
+      "end": {
+        "line": 2,
+        "character": 18
+      }
+    }
   }]
 }