test: css nesting (#190)

Author: alexander-akait

test/test-cases/nesting/expected.css

@@ -0,0 +1,19 @@
+:import("path/library.css") {
+  i__imported_importName_0: importName;
+}
+
+:local(.foo) {
+  display: grid;
+
+  @media (orientation: landscape) {
+    &:local(.bar) {
+      grid-auto-flow: column;
+
+      @media (min-width: 1024px) {
+        &:local(.baz) {
+          composes: i__imported_importName_0;
+        }
+      }
+    }
+  }
+}

test/test-cases/nesting/source.css

@@ -0,0 +1,15 @@
+:local(.foo) {
+  display: grid;
+
+  @media (orientation: landscape) {
+    &:local(.bar) {
+      grid-auto-flow: column;
+
+      @media (min-width: 1024px) {
+        &:local(.baz) {
+          composes: importName from "path/library.css";
+        }
+      }
+    }
+  }
+}