command: string - strlen

internal/command/string/strlen_test.go

@@ -0,0 +1,71 @@
+package string
+
+import (
+	"testing"
+
+	"github.com/nalgeon/redka/internal/redis"
+	"github.com/nalgeon/redka/internal/testx"
+)
+
+func TestStrlenParse(t *testing.T) {
+	tests := []struct {
+		cmd  string
+		want Strlen
+		err  error
+	}{
+		{
+			cmd:  "strlen",
+			want: Strlen{},
+			err:  redis.ErrInvalidArgNum,
+		},
+		{
+			cmd:  "strlen name",
+			want: Strlen{key: "name"},
+			err:  nil,
+		},
+		{
+			cmd:  "strlen name age",
+			want: Strlen{},
+			err:  redis.ErrInvalidArgNum,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.cmd, func(t *testing.T) {
+			cmd, err := redis.Parse(ParseStrlen, test.cmd)
+			testx.AssertEqual(t, err, test.err)
+			if err == nil {
+				testx.AssertEqual(t, cmd.key, test.want.key)
+			} else {
+				testx.AssertEqual(t, cmd, test.want)
+			}
+		})
+	}
+}
+
+func TestStrlenExec(t *testing.T) {
+	t.Run("strlen", func(t *testing.T) {
+		db, red := getDB(t)
+		defer db.Close()
+		_ = db.Str().Set("name", "alice")
+
+		cmd := redis.MustParse(ParseStrlen, "strlen name")
+		conn := redis.NewFakeConn()
+		res, err := cmd.Run(conn, red)
+		testx.AssertNoErr(t, err)
+		testx.AssertEqual(t, res, 5)
+		testx.AssertEqual(t, conn.Out(), "5")
+	})
+
+	t.Run("key not found", func(t *testing.T) {
+		db, red := getDB(t)
+		defer db.Close()
+
+		cmd := redis.MustParse(ParseStrlen, "strlen name")
+		conn := redis.NewFakeConn()
+		res, err := cmd.Run(conn, red)
+		testx.AssertNoErr(t, err)
+		testx.AssertEqual(t, res, 0)
+		testx.AssertEqual(t, conn.Out(), "0")
+	})
+}