From b6d26be5243ddbf84a155fcabb28ef24d84cdee2 Mon Sep 17 00:00:00 2001
From: "zhangxiaoyu.york" <516302150@qq.com>
Date: Tue, 21 Mar 2023 21:42:42 +0800
Subject: [PATCH] test:  fix ut TestTan due to math.Tan(math.Pi / 4) equals
 0.9999999999999998, not 1 (#42421)

close pingcap/tidb#42420
---
 expression/builtin_math_test.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/expression/builtin_math_test.go b/expression/builtin_math_test.go
index cbcafc12bb..cd7fbb4a44 100644
--- a/expression/builtin_math_test.go
+++ b/expression/builtin_math_test.go
@@ -985,8 +985,8 @@ func TestTan(t *testing.T) {
 	}{
 		{nil, 0, true, false},
 		{int64(0), float64(0), false, false},
-		{math.Pi / 4, float64(1), false, false},
-		{-math.Pi / 4, float64(-1), false, false},
+		{math.Pi / 4, math.Tan(math.Pi / 4), false, false},
+		{-math.Pi / 4, math.Tan(-math.Pi / 4), false, false},
 		{math.Pi * 3 / 4, math.Tan(math.Pi * 3 / 4), false, false}, // in mysql and golang, it equals -1.0000000000000002, not -1
 		{"0.000", float64(0), false, false},
 		{"sdfgsdfg", 0, false, true},