chore: import upstream snapshot with attribution

internal/parser/languages/css_test.go

@@ -0,0 +1,88 @@
+package languages
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/zzet/gortex/internal/graph"
+)
+
+func TestCSSExtractor_Selectors(t *testing.T) {
+	src := []byte(`.container {
+  display: flex;
+}
+
+#main-content {
+  padding: 20px;
+}
+
+:root {
+  --primary-color: #333;
+}
+`)
+	e := NewCSSExtractor()
+	result, err := e.Extract("style.css", src)
+	require.NoError(t, err)
+
+	// Should have file node at minimum.
+	assert.GreaterOrEqual(t, len(result.Nodes), 1)
+}
+
+func TestCSSExtractor_Import(t *testing.T) {
+	src := []byte(`@import url("reset.css");
+@import "theme.css";
+`)
+	e := NewCSSExtractor()
+	result, err := e.Extract("style.css", src)
+	require.NoError(t, err)
+
+	imports := edgesOfKind(result.Edges, graph.EdgeImports)
+	assert.GreaterOrEqual(t, len(imports), 1)
+}
+
+func TestCSSExtractor_ClassSelector(t *testing.T) {
+	src := []byte(`.btn {
+  padding: 10px;
+}
+.btn-primary {
+  color: blue;
+}
+`)
+	e := NewCSSExtractor()
+	result, err := e.Extract("buttons.css", src)
+	require.NoError(t, err)
+
+	types := nodesOfKind(result.Nodes, graph.KindType)
+	assert.GreaterOrEqual(t, len(types), 2)
+}
+
+func TestCSSExtractor_IDSelector(t *testing.T) {
+	src := []byte(`#header {
+  height: 60px;
+}
+#footer {
+  height: 40px;
+}
+`)
+	e := NewCSSExtractor()
+	result, err := e.Extract("layout.css", src)
+	require.NoError(t, err)
+
+	vars := nodesOfKind(result.Nodes, graph.KindVariable)
+	assert.GreaterOrEqual(t, len(vars), 2)
+}
+
+func TestCSSExtractor_CustomProperties(t *testing.T) {
+	src := []byte(`:root {
+  --primary-color: #333;
+  --font-size: 16px;
+}
+`)
+	e := NewCSSExtractor()
+	result, err := e.Extract("vars.css", src)
+	require.NoError(t, err)
+
+	vars := nodesOfKind(result.Nodes, graph.KindVariable)
+	assert.GreaterOrEqual(t, len(vars), 2)
+}