test(cmd): table-test hier-check parse and FindAll on fixture

cmd/internal-tools/hier-check/main_test.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/priyanshujain/sanderling/internal/hierarchy"
+)
+
+func TestHierCheck_ParseAndFind(t *testing.T) {
+	content, err := os.ReadFile(filepath.Join("testdata", "dump.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	tree, err := hierarchy.Parse(string(content))
+	if err != nil {
+		t.Fatalf("parse: %v", err)
+	}
+	if got := len(tree.Elements); got != 4 {
+		t.Fatalf("element count: got %d, want 4", got)
+	}
+
+	cases := []struct {
+		selector string
+		want     int
+	}{
+		{"desc:row", 2},
+		{"id:title", 1},
+		{"text:Bob", 1},
+		{"id:missing", 0},
+	}
+	for _, c := range cases {
+		if got := len(tree.FindAll(c.selector)); got != c.want {
+			t.Errorf("%s: got %d matches, want %d", c.selector, got, c.want)
+		}
+	}
+}
+
+func TestHierCheck_MalformedReturnsError(t *testing.T) {
+	if _, err := hierarchy.Parse(`{"attributes": {`); err == nil {
+		t.Fatal("expected error for malformed hierarchy, got nil")
+	}
+}

cmd/internal-tools/hier-check/testdata/dump.json

@@ -0,0 +1,17 @@
+{
+  "attributes": {"class": "android.widget.LinearLayout", "package": "app", "bounds": "[0,0,1080,2340]"},
+  "children": [
+    {
+      "attributes": {"resource-id": "app:id/title", "text": "Hello", "bounds": "[10,20,200,60]"},
+      "children": []
+    },
+    {
+      "attributes": {"resource-id": "app:id/row", "text": "Alice", "content-desc": "row", "bounds": "[0,100,1080,200]"},
+      "children": []
+    },
+    {
+      "attributes": {"resource-id": "app:id/row", "text": "Bob", "content-desc": "row", "bounds": "[0,200,1080,300]"},
+      "children": []
+    }
+  ]
+}