chore: add example test

Author: Jia He

fsearch_test_example.go

@@ -0,0 +1,51 @@
+package fsearch
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestFSearchExample(t *testing.T) {
+	t.Run("test example", func(t *testing.T) {
+		const maxResultSize = 50 // the upper bound of matched results size
+		const pathSeparator = "/"
+		fs := New(pathSeparator, maxResultSize)
+
+		// add paths
+		path1 := "a/keyword/c"
+		path2 := "a/b/keyword"
+		err := fs.AddPath(path1)
+		if err != nil {
+			t.Fatal(err)
+		}
+		err = fs.AddPath(path2)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		// search for a key word
+		matchedPaths, err := fs.Search("keyword") // matchedPaths should contain both path1 and path2
+		if err != nil {
+			t.Fatal(err)
+		}
+		fmt.Printf("%+v", matchedPaths)
+
+		// move a path
+		err = fs.MovePath("a/keyword", "a/b/keyword") // "a/keyword", "a/keyword/c" will be under path2
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		// rename a path
+		err = fs.RenamePath("a/b/keyword", "keyword2") // entry "a/b/keyword" is renamed to "a/b/keyword2"
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		// delete paths
+		err = fs.DelPath("a/b/keyworde")
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+}