Add example test

Author: saintfish

example_test.go

@@ -0,0 +1,26 @@
+package chardet
+
+import (
+	"fmt"
+)
+
+var (
+	zh_gb18030_text = []byte{
+		71, 111, 202, 199, 71, 111, 111, 103, 108, 101, 233, 95, 176, 108, 181, 196, 210, 187, 214, 214, 190, 142, 215, 103, 208, 205, 163, 172, 129, 75, 176, 108,
+		208, 205, 163, 172, 178, 162, 190, 223, 211, 208, 192, 172, 187, 248, 187, 216, 202, 213, 185, 166, 196, 220, 181, 196, 177, 224, 179, 204, 211, 239, 209, 212,
+		161, 163, 10,
+	}
+)
+
+func ExampleTextDetector() {
+	detector := NewTextDetector()
+	result, err := detector.DetectBest(zh_gb18030_text)
+	if err == nil {
+		fmt.Printf(
+			"Detected charset is %s, language is %s",
+			result.Charset,
+			result.Language)
+	}
+	// Output:
+	// Detected charset is GB-18030, language is zh
+}