[FIX]: Deal with multiple spaces between classes

lib/knife/tag_utils.js

@@ -21,3 +21,10 @@ module.exports.attributeValue = function(tag, attributeName) {
 module.exports.isTagNode = function(node) {
   return ["tag", "style", "script"].indexOf(node.type) !== -1;
 };
+
+module.exports.getClasses = function(node) {
+  const classes = node.attribs.class ? node.attribs.class.value : "";
+  return classes
+    .trim()
+    .split(/\s+/);
+};

lib/rules/class-no-dup/index.js

@@ -1,15 +1,11 @@
-const { isTagNode } = require("../../knife/tag_utils");
+const { isTagNode, getClasses } = require("../../knife/tag_utils");
 
 module.exports = {
   name: "class-no-dup",
   on: ["dom"],
   need: "dom"
 };
 
-function getClasses(node) {
-  return node.attribs.class.value.trim().split(" ");
-}
-
 function filterClasses(classes, options) {
   const ignore = options["id-class-ignore-regex"];
 

lib/rules/class-style/__tests__/index.js

@@ -151,6 +151,18 @@ describe("class-style", function() {
     expect(issues).to.have.lengthOf(0);
   });
 
+  it("Should deal with multiple spaces between classes", async function() {
+    const linter = createLinter({
+      "class-style": [
+        true,
+        "lowercase"
+      ]
+    });
+    const html = "<div class=\"foo  bar\"></div>";
+    const issues = await linter.lint(html);
+    expect(issues).to.have.lengthOf(0);
+  });
+
   describe("'lowercase' format", function() {
     it("Should not report an error for classes with valid format", async function() {
       const linter = createLinter({

lib/rules/class-style/index.js

@@ -1,7 +1,7 @@
 const proc = require("../../process_option");
 /* eslint-disable-next-line */
 const { isRegExp } = require("util");
-const { isTagNode } = require("../../knife/tag_utils");
+const { isTagNode, getClasses } = require("../../knife/tag_utils");
 
 module.exports = {
   name: "class-style",
@@ -19,10 +19,6 @@ module.exports = {
   }
 };
 
-function getClasses(node) {
-  return node.attribs.class.value.trim().split(" ");
-}
-
 function filterClasses(classes, options) {
   const ignore = options["id-class-ignore-regex"];