Add driver

1 files changed, 50 insertions, 0 deletions

diff --git a/driver/parser_test.go b/driver/parser_test.go
new file mode 100644
index 0000000..bc6a34e
--- /dev/null
+++ b/driver/parser_test.go
@@ -0,0 +1,50 @@
+package driver
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/nihei9/vartan/grammar"
+	"github.com/nihei9/vartan/spec"
+)
+
+func TestParser_Parse(t *testing.T) {
+	specSrc := `
+expr
+    : expr "\+" term
+    | term
+    ;
+term
+    : term "\*" factor
+    | factor
+    ;
+factor
+    : "\(" expr "\)"
+    | id
+    ;
+id: "[A-Za-z_][0-9A-Za-z_]*";
+`
+	ast, err := spec.Parse(strings.NewReader(specSrc))
+	if err != nil {
+		t.Fatal(err)
+	}
+	g, err := grammar.NewGrammar(ast)
+	if err != nil {
+		t.Fatal(err)
+	}
+	gram, err := grammar.Compile(g)
+	if err != nil {
+		t.Fatal(err)
+	}
+	src := `(a+(b+c))*d+e`
+	p, err := NewParser(gram, strings.NewReader(src))
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = p.Parse()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	printCST(p.GetCST(), 0)
+}