sdk: add TestLogLevel for setting log level in tests

And default log level to WARN.

agent/acl_test.go

@@ -67,7 +67,7 @@ func NewTestACLAgent(t *testing.T, name string, hcl string, resolveAuthz authzRe
 
 	bd.Logger = hclog.NewInterceptLogger(&hclog.LoggerOptions{
 		Name:       name,
-		Level:      hclog.Debug,
+		Level:      testutil.TestLogLevel,
 		Output:     logBuffer,
 		TimeFormat: "04:05.000",
 	})

agent/ae/ae_test.go

@@ -8,10 +8,11 @@ import (
 	"testing"
 	"time"
 
-	"github.com/hashicorp/consul/lib"
-	"github.com/hashicorp/consul/sdk/testutil"
 	"github.com/hashicorp/go-hclog"
 	"github.com/stretchr/testify/assert"
+
+	"github.com/hashicorp/consul/lib"
+	"github.com/hashicorp/consul/sdk/testutil"
 )
 
 func TestAE_scaleFactor(t *testing.T) {
@@ -401,7 +402,6 @@ func (m *mock) SyncChanges() error {
 
 func testSyncer(t *testing.T) *StateSyncer {
 	logger := hclog.New(&hclog.LoggerOptions{
-		Level:  0,
 		Output: testutil.NewLogBuffer(t),
 	})
 

agent/consul/client_test.go

@@ -507,7 +507,7 @@ func newDefaultDeps(t *testing.T, c *Config) Deps {
 
 	logger := hclog.NewInterceptLogger(&hclog.LoggerOptions{
 		Name:   c.NodeName,
-		Level:  hclog.Debug,
+		Level:  testutil.TestLogLevel,
 		Output: testutil.NewLogBuffer(t),
 	})
 

agent/consul/leader_test.go

@@ -1445,7 +1445,7 @@ func TestLeader_ConfigEntryBootstrap_Fail(t *testing.T) {
 
 			logger := hclog.NewInterceptLogger(&hclog.LoggerOptions{
 				Name:   config.NodeName,
-				Level:  hclog.Debug,
+				Level:  testutil.TestLogLevel,
 				Output: io.MultiWriter(pw, testutil.NewLogBuffer(t)),
 			})
 

agent/consul/prepared_query_endpoint_test.go

@@ -21,6 +21,7 @@ import (
 	"github.com/hashicorp/consul/agent/structs"
 	tokenStore "github.com/hashicorp/consul/agent/token"
 	"github.com/hashicorp/consul/api"
+	"github.com/hashicorp/consul/sdk/testutil"
 	"github.com/hashicorp/consul/sdk/testutil/retry"
 	"github.com/hashicorp/consul/testrpc"
 	"github.com/hashicorp/consul/types"
@@ -2760,7 +2761,7 @@ func (m *mockQueryServer) GetLogger() hclog.Logger {
 		m.Logger = hclog.New(&hclog.LoggerOptions{
 			Name:   "mock_query",
 			Output: m.LogBuffer,
-			Level:  hclog.Debug,
+			Level:  testutil.TestLogLevel,
 		})
 	}
 	return m.Logger

agent/router/manager_internal_test.go

@@ -25,10 +25,7 @@ func init() {
 
 func GetBufferedLogger() hclog.Logger {
 	localLogBuffer = new(bytes.Buffer)
-	return hclog.New(&hclog.LoggerOptions{
-		Level:  0,
-		Output: localLogBuffer,
-	})
+	return hclog.New(&hclog.LoggerOptions{Output: localLogBuffer})
 }
 
 type fauxConnPool struct {

agent/testagent.go

@@ -159,7 +159,7 @@ func (a *TestAgent) Start(t *testing.T) error {
 	}
 
 	logger := hclog.NewInterceptLogger(&hclog.LoggerOptions{
-		Level:      hclog.Debug,
+		Level:      testutil.TestLogLevel,
 		Output:     logOutput,
 		TimeFormat: "04:05.000",
 		Name:       name,

sdk/testutil/testlog.go

@@ -10,6 +10,20 @@ import (
 	"github.com/hashicorp/go-hclog"
 )
 
+// TestLogLevel is set from the TEST_LOG_LEVEL environment variable. It can
+// be used by tests to set the log level of a hclog.Logger. Defaults to
+// hclog.Warn if the environment variable is unset, or if the value of the
+// environment variable can not be matched to a log level.
+var TestLogLevel = testLogLevel()
+
+func testLogLevel() hclog.Level {
+	level := hclog.LevelFromString(os.Getenv("TEST_LOG_LEVEL"))
+	if level != hclog.NoLevel {
+		return level
+	}
+	return hclog.Warn
+}
+
 func Logger(t TestingTB) hclog.InterceptLogger {
 	return LoggerWithOutput(t, NewLogBuffer(t))
 }