Update the tests

- Change extension of the source files to .scss. dart-sass throws compiler warnings when encountering css files which contain sass variables.
- Split the postcss-import test into a separate source file
- Update the .expect files. Dart Sass does not support a compact output and the source-map hashes are different, so the tests where failing.

Author: Sam Van Campenhout

.tape.js

@@ -9,7 +9,8 @@ module.exports = {
 	'postcss-sass': {
 		'basic': {
 			message: 'supports basic usage',
-			processOptions: processOptions
+			processOptions: processOptions,
+			source: 'basic.scss'
 		},
 		'basic:sassopts': {
 			message: 'supports sass options usage',
@@ -18,30 +19,34 @@ module.exports = {
 				indentWidth: 1,
 				outputStyle: 'expanded'
 			},
-			processOptions: processOptions
+			processOptions: processOptions,
+			source: 'basic.scss'
 		},
 		'basic:mixed': {
 			message: 'supports mixed (postcss-unroot, postcss-sass) usage',
 			plugin: () => require('postcss')(
 				require('postcss-unroot'),
 				require('.')
 			),
-			processOptions: processOptions
+			processOptions: processOptions,
+			source: 'basic.scss'
 		},
 		'imports': {
 			message: 'supports imports usage',
 			plugin: () => require('postcss')(
 				require('.')
 			),
-			processOptions: processOptions
+			processOptions: processOptions,
+			source: 'imports.scss'
 		},
-		'imports:postcss': {
+		'css-imports': {
 			message: 'supports imports (postcss-import, postcss-sass) usage',
 			plugin: () => require('postcss')(
 				require('postcss-import'),
 				require('.')
 			),
-			processOptions: processOptions
+			processOptions: processOptions,
+			source: 'css-imports.scss'
 		}
 	}
 };

test/basic.expect.css

@@ -0,0 +1,4 @@
+:root {
+	color: $primary-color;
+	font: 100% $font-stack;
+}

test/basic.mixed.expect.css

@@ -0,0 +1,2 @@
+$font-stack:    Helvetica, sans-serif;
+$primary-color: #333;