From 722004ba57279f0b72eb3c1c5ac0a8e0052ca19e Mon Sep 17 00:00:00 2001
From: Matthew Halpern <matthalp@gmail.com>
Date: Tue, 8 Jan 2019 18:36:24 -0800
Subject: [PATCH] ethdb_test: remove parallel database modification test cases

The TestLDB_ParallelPutGet and TestMemoryDB_ParallelPutGet test cases are not
adding any additional coverage beyond what the other test cases provide.
---
 ethdb/database_test.go | 69 ------------------------------------------
 1 file changed, 69 deletions(-)

diff --git a/ethdb/database_test.go b/ethdb/database_test.go
index 382fedbf9e..0c35d7789e 100644
--- a/ethdb/database_test.go
+++ b/ethdb/database_test.go
@@ -20,11 +20,8 @@ package ethdb_test
 
 import (
 	"bytes"
-	"fmt"
 	"io/ioutil"
 	"os"
-	"strconv"
-	"sync"
 	"testing"
 
 	"github.com/ethereum/go-ethereum/ethdb"
@@ -146,69 +143,3 @@ func testPutGet(db ethdb.Database, t *testing.T) {
 		}
 	}
 }
-
-func TestLDB_ParallelPutGet(t *testing.T) {
-	db, remove := newTestLDB()
-	defer remove()
-	testParallelPutGet(db, t)
-}
-
-func TestMemoryDB_ParallelPutGet(t *testing.T) {
-	testParallelPutGet(ethdb.NewMemDatabase(), t)
-}
-
-func testParallelPutGet(db ethdb.Database, t *testing.T) {
-	const n = 8
-	var pending sync.WaitGroup
-
-	pending.Add(n)
-	for i := 0; i < n; i++ {
-		go func(key string) {
-			defer pending.Done()
-			err := db.Put([]byte(key), []byte("v"+key))
-			if err != nil {
-				panic("put failed: " + err.Error())
-			}
-		}(strconv.Itoa(i))
-	}
-	pending.Wait()
-
-	pending.Add(n)
-	for i := 0; i < n; i++ {
-		go func(key string) {
-			defer pending.Done()
-			data, err := db.Get([]byte(key))
-			if err != nil {
-				panic("get failed: " + err.Error())
-			}
-			if !bytes.Equal(data, []byte("v"+key)) {
-				panic(fmt.Sprintf("get failed, got %q expected %q", []byte(data), []byte("v"+key)))
-			}
-		}(strconv.Itoa(i))
-	}
-	pending.Wait()
-
-	pending.Add(n)
-	for i := 0; i < n; i++ {
-		go func(key string) {
-			defer pending.Done()
-			err := db.Delete([]byte(key))
-			if err != nil {
-				panic("delete failed: " + err.Error())
-			}
-		}(strconv.Itoa(i))
-	}
-	pending.Wait()
-
-	pending.Add(n)
-	for i := 0; i < n; i++ {
-		go func(key string) {
-			defer pending.Done()
-			_, err := db.Get([]byte(key))
-			if err == nil {
-				panic("get succeeded")
-			}
-		}(strconv.Itoa(i))
-	}
-	pending.Wait()
-}