Update dependencies and tests structure

.editorconfig

@@ -4,7 +4,16 @@ root = true
 [*]
 charset = utf-8
 end_of_line = lf
-indent_size = 2
-indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
+
+[*.{js,json}]
+indent_style = space
+indent_size = 2
+
+[*.css]
+indent_style = space
+indent_size = 4
+
+[*.md]
+trim_trailing_whitespace = false

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "7.0"
+  - '8'
 install:
   - npm install
 before_script:

__tests__/css-invalid.css

@@ -0,0 +1,3 @@
+.element {
+    color: #000 !important;
+}

__tests__/css-valid.css

@@ -0,0 +1,69 @@
+@import url(x.css);
+@import url(y.css);
+
+/**
+ * Multi-line comment
+ */
+
+.selector-1,
+.selector-2,
+.selector-3[type="text"] {
+    background: linear-gradient(#fff, rgba(0, 0, 0, 0.8));
+    box-sizing: border-box;
+    display: block;
+    color: #333;
+}
+
+.selector-a,
+.selector-b:not(:first-child) {
+    padding: 10px;
+    top: calc(calc(1em * 2) / 3);
+}
+
+.selector-x { width: 10%; }
+.selector-y { width: 20%; }
+.selector-z { width: 30%; }
+
+/* Single-line comment */
+
+@media (min-width: 60em) {
+    .selector {
+        /* Flush to parent comment */
+        transform: translate(1, 1) scale(3);
+    }
+}
+
+@media (orientation: portrait), projection and (color) {
+    .selector-i + .selector-ii {
+        background: color(rgb(0, 0, 0) lightness(50%));
+        font-family: helvetica, "arial black", sans-serif;
+    }
+}
+
+/* Flush single line comment */
+@media
+    screen and (min-resolution: 192dpi),
+    screen and (min-resolution: 2dppx) {
+    .selector {
+        background-image:
+            repeating-linear-gradient(
+                -45deg,
+                transparent,
+                #fff 25px,
+                rgba(255, 255, 255, 1) 50px
+            );
+        margin: 10px;
+        margin-bottom: 5px;
+        box-shadow:
+            0 1px 1px #000,
+            0 1px 0 #fff,
+            2px 2px 1px 1px #ccc inset;
+        height: 10rem;
+    }
+
+    /* Flush nested single line comment */
+    .selector::after {
+        content: '→';
+        background-image: url(x.svg);
+    }
+}

__tests__/index.js

@@ -1,85 +1,9 @@
 const config = require('../');
+const fs = require('fs');
 const stylelint = require('stylelint');
 
-const validCss = (
-`@import url(x.css);
-@import url(y.css);
-
-/**
- * Multi-line comment
- */
-
-.selector-1,
-.selector-2,
-.selector-3[type="text"] {
-    background: linear-gradient(#fff, rgba(0, 0, 0, 0.8));
-    box-sizing: border-box;
-    display: block;
-    color: #333;
-}
-
-.selector-a,
-.selector-b:not(:first-child) {
-    padding: 10px;
-    top: calc(calc(1em * 2) / 3);
-}
-
-.selector-x { width: 10%; }
-.selector-y { width: 20%; }
-.selector-z { width: 30%; }
-
-/* Single-line comment */
-
-@media (min-width >= 60em) {
-    .selector {
-        /* Flush to parent comment */
-        transform: translate(1, 1) scale(3);
-    }
-}
-
-@media (orientation: portrait), projection and (color) {
-    .selector-i + .selector-ii {
-        background: color(rgb(0, 0, 0) lightness(50%));
-        font-family: helvetica, "arial black", sans-serif;
-    }
-}
-
-/* Flush single line comment */
-@media
-    screen and (min-resolution: 192dpi),
-    screen and (min-resolution: 2dppx) {
-    .selector {
-        background-image:
-            repeating-linear-gradient(
-                -45deg,
-                transparent,
-                #fff 25px,
-                rgba(255, 255, 255, 1) 50px
-            );
-        margin: 10px;
-        margin-bottom: 5px;
-        box-shadow:
-            0 1px 1px #000,
-            0 1px 0 #fff,
-            2px 2px 1px 1px #ccc inset;
-        height: 10rem;
-    }
-
-    /* Flush nested single line comment */
-    .selector::after {
-        content: '→';
-        background-image: url(x.svg);
-    }
-}
-
-`);
-
-const invalidCss = (
-`.element {
-    color: #000 !important;
-}
-
-`);
+const validCss = fs.readFileSync('./__tests__/css-valid.css', 'utf-8');
+const invalidCss = fs.readFileSync('./__tests__/css-invalid.css', 'utf-8');
 
 describe('flags no warnings with valid CSS', () => {
   let result;