Run all tests on CI (#1189)

This could possibly be a bug in `go test` command
golang/go#36527 .

The `go test` command would skip tests in sub-packages if
the top-level package has a `custom flag` defined and the
sub-packages don't define it.

Issue golang/go#36527 (comment)
has an example of this.

This PR also removes the code from the test that would unnecessary
start a web server. I see two problems here
1. An unnecessary web server running.
2. We cannot run multiple tests are the same time since the second
    run of the test would try to start a web server and
    crash saying `port already in use`.

(cherry picked from commit 5870b7b)

db_test.go

@@ -26,7 +26,6 @@ import (
 	"log"
 	"math"
 	"math/rand"
-	"net/http"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -1957,12 +1956,7 @@ func TestVerifyChecksum(t *testing.T) {
 }
 
 func TestMain(m *testing.M) {
-	// call flag.Parse() here if TestMain uses flags
-	go func() {
-		if err := http.ListenAndServe("localhost:8080", nil); err != nil {
-			panic("Unable to open http port at 8080")
-		}
-	}()
+	flag.Parse()
 	os.Exit(m.Run())
 }
 

test.sh

@@ -4,30 +4,43 @@ set -e
 
 go version
 
+packages=$(go list ./... | grep github.com/dgraph-io/badger/v2/)
+
+if [[ ! -z "$TEAMCITY_VERSION" ]]; then
+  export GOFLAGS="-json"
+fi
+
 # Ensure that we can compile the binary.
 pushd badger
 go build -v .
 popd
 
 # Run the memory intensive tests first.
-go test -v --manual=true -run='TestBigKeyValuePairs$'
-go test -v --manual=true -run='TestPushValueLogLimit'
+go test -v -run='TestBigKeyValuePairs$' --manual=true
+go test -v -run='TestPushValueLogLimit' --manual=true
 
 # Run the special Truncate test.
 rm -rf p
-go test -v --manual=true -run='TestTruncateVlogNoClose$' .
+go test -v -run='TestTruncateVlogNoClose$' --manual=true
 truncate --size=4096 p/000000.vlog
-go test -v --manual=true -run='TestTruncateVlogNoClose2$' .
-go test -v --manual=true -run='TestTruncateVlogNoClose3$' .
+go test -v -run='TestTruncateVlogNoClose2$' --manual=true
+go test -v -run='TestTruncateVlogNoClose3$' --manual=true
 rm -rf p
 
 # Then the normal tests.
+echo
+echo "==> Starting test for table, skl and y package"
+go test -v -race github.com/dgraph-io/badger/v2/skl
+# Run test for all package except the top level package. The top level package support the
+# `vlog_mmap` flag which rest of the packages don't support.
+go test -v -race $packages
+
 echo
 echo "==> Starting tests with value log mmapped..."
-sleep 5
-go test -v --vlog_mmap=true -race ./...
+# Run top level package tests with mmap flag.
+go test -v -race github.com/dgraph-io/badger/v2 --vlog_mmap=true
 
 echo
 echo "==> Starting tests with value log not mmapped..."
-sleep 5
-go test -v --vlog_mmap=false -race ./...
+go test -v -race github.com/dgraph-io/badger/v2 --vlog_mmap=false
+