From 2e2ad4996fe76408e3705b10c05949edc075755b Mon Sep 17 00:00:00 2001
From: Tanisha Saheb <141667332+tanishasaheb15@users.noreply.github.com>
Date: Sat, 26 Aug 2023 11:54:52 +0000
Subject: [PATCH 1/4] unit test cases for /pkg/util/misc

---
 pkg/util/misc/misc_test.go | 80 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 pkg/util/misc/misc_test.go

diff --git a/pkg/util/misc/misc_test.go b/pkg/util/misc/misc_test.go
new file mode 100644
index 00000000..416a2144
--- /dev/null
+++ b/pkg/util/misc/misc_test.go
@@ -0,0 +1,80 @@
+package misc_test
+
+import (
+	"bytes"
+	"errors"
+	"testing"
+
+	"github.com/arana-db/arana/pkg/util/misc"
+)
+
+func TestParseTable(t *testing.T) {
+	tests := []struct {
+		input string
+		db    string
+		tbl   string
+		err   error
+	}{
+		{"dbname.tablename", "dbname", "tablename", nil},
+		{"invalid", "", "", errors.New("invalid table name: invalid")},
+		{"", "", "", errors.New("invalid table name: ")},
+	}
+
+	for _, tt := range tests {
+		db, tbl, err := misc.ParseTable(tt.input)
+		if db != tt.db || tbl != tt.tbl || (err != nil && err.Error() != tt.err.Error()) {
+			t.Errorf("ParseTable(%s) = (%s, %s, %v), want (%s, %s, %v)", tt.input, db, tbl, err, tt.db, tt.tbl, tt.err)
+		}
+	}
+}
+
+func TestTryClose(t *testing.T) {
+	var buf bytes.Buffer
+	err := misc.TryClose(&buf)
+	if err != nil {
+		t.Errorf("TryClose() failed on a valid io.Closer: %v", err)
+	}
+
+	err = misc.TryClose(123) // an integer isn't an io.Closer
+	if err != nil {
+		t.Errorf("TryClose() failed on an invalid io.Closer: %v", err)
+	}
+}
+
+func TestReverseSlice(t *testing.T) {
+	tests := []struct {
+		input    []int
+		expected []int
+	}{
+		{[]int{1, 2, 3}, []int{3, 2, 1}},
+		{[]int{}, []int{}},
+		{[]int{1}, []int{1}},
+	}
+
+	for _, tt := range tests {
+		misc.ReverseSlice(tt.input)
+		for i, val := range tt.input {
+			if val != tt.expected[i] {
+				t.Errorf("ReverseSlice(%v) = %v, want %v", tt.input, tt.input, tt.expected)
+				break
+			}
+		}
+	}
+}
+
+func TestCartesianProduct(t *testing.T) {
+	input := [][]int{{1, 2}, {3, 4}}
+	expected := [][]int{{1, 3}, {1, 4}, {2, 3}, {2, 4}}
+	result := misc.CartesianProduct(input)
+	if len(result) != len(expected) {
+		t.Fatalf("CartesianProduct(%v) has %d results, want %d", input, len(result), len(expected))
+	}
+	for i, slice := range result {
+		for j, val := range slice {
+			if val != expected[i][j] {
+				t.Errorf("CartesianProduct(%v) = %v, want %v", input, result, expected)
+				break
+			}
+		}
+	}
+}

From 08ae4647c77b6ecc1681dfff8f1d52528d6e609f Mon Sep 17 00:00:00 2001
From: Tanisha Saheb <141667332+tanishasaheb15@users.noreply.github.com>
Date: Sat, 26 Aug 2023 12:07:08 +0000
Subject: [PATCH 2/4] Add License discription

---
 pkg/util/misc/misc_test.go | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/pkg/util/misc/misc_test.go b/pkg/util/misc/misc_test.go
index 416a2144..9d53b980 100644
--- a/pkg/util/misc/misc_test.go
+++ b/pkg/util/misc/misc_test.go
@@ -1,3 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package misc_test
 
 import (

From a0cf19760678199a8c6938f809c72d6dc2f91a55 Mon Sep 17 00:00:00 2001
From: Tanisha Saheb <141667332+tanishasaheb15@users.noreply.github.com>
Date: Sun, 27 Aug 2023 13:15:42 +0000
Subject: [PATCH 3/4] Fix the import format

---
 pkg/util/misc/misc_test.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkg/util/misc/misc_test.go b/pkg/util/misc/misc_test.go
index 9d53b980..1b515477 100644
--- a/pkg/util/misc/misc_test.go
+++ b/pkg/util/misc/misc_test.go
@@ -21,7 +21,9 @@ import (
 	"bytes"
 	"errors"
 	"testing"
+)
 
+import (
 	"github.com/arana-db/arana/pkg/util/misc"
 )
 

From e5d338151ce16f22c53c09a603d7157344a669f5 Mon Sep 17 00:00:00 2001
From: Tanisha Saheb <141667332+tanishasaheb15@users.noreply.github.com>
Date: Sun, 27 Aug 2023 13:25:48 +0000
Subject: [PATCH 4/4] add dependency

---
 go.mod | 1 +
 1 file changed, 1 insertion(+)

diff --git a/go.mod b/go.mod
index c023d0f8..e8649596 100644
--- a/go.mod
+++ b/go.mod
@@ -66,6 +66,7 @@ require (
 	github.com/docker/distribution v2.7.1+incompatible // indirect
 	github.com/docker/docker v20.10.11+incompatible // indirect
 	github.com/docker/go-connections v0.4.0 // indirect
+	github.com/dubbogo/tools v1.0.9 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
 	github.com/go-errors/errors v1.0.1 // indirect