1 files changed, 37 insertions, 0 deletions
diff --git a/ast/ast_test.go b/ast/ast_test.go
new file mode 100644
index 0000000..887827b
--- /dev/null
+++ b/ast/ast_test.go
@@ -0,0 +1,37 @@
+package ast
+
+import (
+	"testing"
+
+	"github.com/mewsen/interpreter/token"
+)
+
+func TestString(t *testing.T) {
+	program := &Program{
+		Statements: []Statement{
+			&LetStatement{
+				Token: token.Token{
+					Type:    token.LET,
+					Literal: "let",
+				},
+				Name: &Identifier{
+					Token: token.Token{
+						Type:    token.IDENT,
+						Literal: "myVar",
+					},
+					Value: "myVar",
+				},
+				Value: &Identifier{
+					Token: token.Token{
+						Type:    token.IDENT,
+						Literal: "anotherVar",
+					},
+					Value: "anotherVar",
+				},
+			},
+		},
+	}
+	if program.String() != "let myVar = anotherVar;" {
+		t.Errorf("program.String() wrong. got=%q", program.String())
+	}
+}