Add simple tests

.npmignore

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 .idea
 .eslint*
 rollup.config.js
+test
 *.tgz

test/.gitignore

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+*.css

test/less/child-01.less

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+/* child-01 */

test/less/child-02-1.less

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+/* child-02-1 */

test/less/child-02-2.less

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+/* child-02-2 */

test/less/child-02.less

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+/* child-02 */

test/less/child-03.less

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+/* child-03 */

test/less/child-04-1.less

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+/* child-04-1 */

test/less/child-04.less

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+/* child-04 */

test/less/child-05-1.less

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+/* child-05-1 */

test/less/child-05.less

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+/* child-05 */

test/less/root-01.less

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+body {
+    background:#000;
+}
+
+// Test skipping commented out imports
+// @import "root-02";
+//@import "root-03";
+
+/*
+a {
+    color:#0a0;
+}
+@import "root-04";
+some text
+*/
+
+/*@import "root-05";*/
+
+@import "child-01";

test/less/root-02.less

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+// Test extraction of imports placed in one line
+@import "child-02"; @import "child-02-1";@import "child-02-2";
+
+body {
+    background:#000;
+}
+

test/less/root-03.less

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+body {
+    background:#000;
+}
+
+// Test extraction of imports with extension specified
+@import "./child-03.less";

test/less/root-04.less

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+// Test some “quirky” cases
+
+// With line breaks
+@import
+    "child-04";
+
+@import
+
+"child-04-1"
+
+;
+
+@import (reference) "child-04";
+
+// Variable name includes substring “import”
+@import01: "root-01";
+
+body {
+    background:#000;
+}

test/less/root-05.less

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+// Test imports with options
+
+@import (reference) "child-05";
+@import (less) "child-05-1.less";
+
+body {
+    background:#000;
+}