fix: handle module import ending / as module (#728)

Author: evilebottnawi

src/importsToResolve.js

@@ -2,7 +2,14 @@ import path from 'path';
 
 import utils from 'loader-utils';
 
-const matchModuleImport = /^~([^/]+|@[^/]+[/][^/]+)$/;
+// Examples:
+// - ~package
+// - ~package/
+// - ~@org
+// - ~@org/
+// - ~@org/package
+// - ~@org/package/
+const matchModuleImport = /^~([^/]+|[^/]+\/|@[^/]+[/][^/]+|@[^/]+\/?|@[^/]+[/][^/]+\/)$/;
 
 /**
  * When libsass tries to resolve an import, it uses a special algorithm.

test/helpers/getCodeFromSass.js

@@ -650,10 +650,18 @@ function getCodeFromSass(testId, options) {
           /^~@path-to-scss-dir\/dir-with-underscore-index$/,
           pathToSCSSIndexAlias
         )
+        .replace(
+          /^~@path-to-scss-dir\/dir-with-underscore-index\/$/,
+          pathToSCSSIndexAlias
+        )
         .replace(
           /^~@path-to-sass-dir\/dir-with-underscore-index$/,
           pathToSassIndexAlias
         )
+        .replace(
+          /^~@path-to-sass-dir\/dir-with-underscore-index\/$/,
+          pathToSassIndexAlias
+        )
         .replace(
           /^~@\/path-to-scss-dir\/dir-with-underscore-index$/,
           pathToSCSSIndexAlias

test/sass/import-alias.sass

@@ -1,4 +1,5 @@
 @import 'path-to-alias'
 @import "~@sass"
 @import "~@path-to-sass-dir/dir-with-underscore-index"
+@import "~@path-to-sass-dir/dir-with-underscore-index/"
 @import "~@/path-to-sass-dir/dir-with-underscore-index"

test/scss/import-alias.scss

@@ -1,4 +1,5 @@
 @import 'path-to-alias';
 @import "~@scss";
 @import "~@path-to-scss-dir/dir-with-underscore-index";
+@import "~@path-to-scss-dir/dir-with-underscore-index/";
 @import "~@/path-to-scss-dir/dir-with-underscore-index";