test: add smoke tests

test/go.mod

@@ -1,3 +1,13 @@
 module github.com/ngalaiko/tree-sitter-go-template/test
 
 go 1.24.5
+
+replace (
+	github.com/ngalaiko/tree-sitter-go-template v0.0.0-20251004152659-ca26229bafcd => ..
+)
+
+require (
+	github.com/mattn/go-pointer v0.0.1 // indirect
+	github.com/ngalaiko/tree-sitter-go-template v0.0.0-20251004152659-ca26229bafcd // indirect
+	github.com/tree-sitter/go-tree-sitter v0.25.0 // indirect
+)

test/go.sum

@@ -0,0 +1,6 @@
+github.com/mattn/go-pointer v0.0.1 h1:n+XhsuGeVO6MEAp7xyEukFINEa+Quek5psIR/ylA6o0=
+github.com/mattn/go-pointer v0.0.1/go.mod h1:2zXcozF6qYGgmsG+SeTZz3oAbFLdD3OWqnUbNvJZAlc=
+github.com/ngalaiko/tree-sitter-go-template v0.0.0-20251004152659-ca26229bafcd h1:3ljjNdG6Pp3KycYusuziadPwSpCYwNFxy2C3eNfyGbg=
+github.com/ngalaiko/tree-sitter-go-template v0.0.0-20251004152659-ca26229bafcd/go.mod h1:+Ja4HHGKOU5RA6eh7wnPHYBoccp3jl1gBa3ErIHAACw=
+github.com/tree-sitter/go-tree-sitter v0.25.0 h1:sx6kcg8raRFCvc9BnXglke6axya12krCJF5xJ2sftRU=
+github.com/tree-sitter/go-tree-sitter v0.25.0/go.mod h1:r77ig7BikoZhHrrsjAnv8RqGti5rtSyvDHPzgTPsUuU=

test/smoke_test.go

@@ -0,0 +1,77 @@
+package test
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/ngalaiko/tree-sitter-go-template/bindings/go"
+
+	tree_sitter "github.com/tree-sitter/go-tree-sitter"
+)
+
+var SMOKE_TESTS_DIR = "./smoke_testdata"
+
+func TestSmoke(t *testing.T) {
+	filepath.Walk(SMOKE_TESTS_DIR, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if info.IsDir() && info.Name() == "templates" {
+			err := filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
+				if err != nil {
+					return err
+				}
+				if !info.IsDir() {
+					t.Run(path, func(t *testing.T) {
+						content, err := os.ReadFile(path)
+						if err != nil {
+							t.Fatal(err)
+						}
+						testTemplateForErrors(t, content)
+					})
+				}
+				return nil
+			})
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}
+
+func testTemplateForErrors(t *testing.T, input []byte) {
+	t.Helper()
+
+	language := tree_sitter.NewLanguage(tree_sitter_gotemplate.Language())
+	if language == nil {
+		t.Errorf("Error loading gotemplate grammar")
+	}
+
+	parser := tree_sitter.NewParser()
+	defer parser.Close()
+	parser.SetLanguage(language)
+
+	tree := parser.Parse(input, nil)
+	if tree == nil {
+		t.Errorf("Error parsing code")
+	}
+	defer tree.Close()
+
+	root := tree.RootNode()
+	if root == nil {
+		t.Errorf("Error parsing code")
+	}
+
+	sexp := root.ToSexp()
+
+	if strings.Contains(sexp, "(ERROR") {
+		t.Errorf("Unexpected (ERROR) in tree: %s", root.ToSexp())
+	}
+
+	if strings.Contains(sexp, "(MISSING") {
+		t.Errorf("Unexpected (MISSING) in tree: %s", root.ToSexp())
+	}
+}

test/smoke_testdata/my-chart/templates/service.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+wrong: key
+kind: Service
+metadata:
+  name: {{ include "example.fullname" . }}
+  labels:
+    {{- include "example.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "example.selectorLabels" . | nindent 4 }}