Added IsInfo() to Logger interface

There are still times when it’s useful to shut off a block of expensive logging code if the logger is disabled.

core.go

@@ -208,6 +208,11 @@ func (l *Core) IsDebug() bool {
 	return l.IsEnabled(DebugLevel)
 }
 
+// IsDebug returns true if INF level is enabled
+func (l *Core) IsInfo() bool {
+	return l.IsEnabled(InfoLevel)
+}
+
 // With returns a new Logger with some context baked in.  All entries
 // logged with the new logger will include this context.
 //

core_test.go

@@ -20,3 +20,31 @@ func TestSweetenFields(t *testing.T) {
 	fields = c.sweetenFields([]interface{}{err})
 	assert.Equal(t, []zap.Field{zap.NamedError("error", err)}, fields)
 }
+
+func TestCore_IsDebug(t *testing.T) {
+	f := NewFactory()
+	f.SetDefaultLevel(InfoLevel)
+
+	l := f.NewLogger("asdf")
+	assert.False(t, l.IsDebug())
+	f.SetDefaultLevel(DebugLevel)
+	assert.True(t, l.IsDebug())
+	f.SetDefaultLevel(ErrorLevel)
+	assert.False(t, l.IsDebug())
+	f.SetLevel("asdf", DebugLevel)
+	assert.True(t, l.IsDebug())
+}
+
+func TestCore_IsInfo(t *testing.T) {
+	f := NewFactory()
+	f.SetDefaultLevel(ErrorLevel)
+
+	l := f.NewLogger("asdf")
+	assert.False(t, l.IsInfo())
+	f.SetDefaultLevel(InfoLevel)
+	assert.True(t, l.IsInfo())
+	f.SetDefaultLevel(ErrorLevel)
+	assert.False(t, l.IsInfo())
+	f.SetLevel("asdf", DebugLevel)
+	assert.True(t, l.IsInfo())
+}

log.go

@@ -20,6 +20,7 @@ type (
 		Error(msg string, args ...interface{})
 
 		IsDebug() bool
+		IsInfo() bool
 
 		// With creates a new Logger with some context already attached.  All
 		// entries logged with the child logger will include this context.