chore: inline log.Interface and handle empty and nil slices the same

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.6.1 to 1.7.2.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.6.1...v1.7.2)

go.mod

@@ -4,5 +4,5 @@ go 1.15
 
 require (
 	github.com/apex/log v1.9.0
-	github.com/stretchr/testify v1.6.1
+	github.com/stretchr/testify v1.7.2
 )

go.sum

@@ -41,8 +41,9 @@ github.com/smartystreets/go-aws-auth v0.0.0-20180515143844-0c1422d1fdb9/go.mod h
 github.com/smartystreets/gunit v1.0.0/go.mod h1:qwPWnhz6pn0NnRBP++URONOVyNkPyr4SauJk4cUOwJs=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.2 h1:4jaiDzPyXQvSd7D0EjG45355tLlV3VOECpq10pLC+8s=
+github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
 github.com/tj/assert v0.0.0-20171129193455-018094318fb0/go.mod h1:mZ9/Rh9oLWpLLDRpvE+3b7gP/C2YyLFYxNmcLnPTMe0=
 github.com/tj/assert v0.0.3 h1:Df/BlaZ20mq6kuai7f5z2TvPFiwC3xaWJSDQNiIS3Rk=
 github.com/tj/assert v0.0.3/go.mod h1:Ne6X72Q+TB1AteidzQncjw9PabbMp4PBMZ1k+vd1Pvk=
@@ -71,5 +72,6 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWD
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c h1:grhR+C34yXImVGp7EzNk+DTIk+323eIUWOmEevy6bDo=
 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

mocks.go

@@ -31,7 +31,7 @@ import (
 // Mock has a Logger for use in unit-testing
 type Mock struct {
 	*sync.RWMutex
-	Logger log.Interface
+	log.Interface
 	Logged []string
 }
 
@@ -48,8 +48,9 @@ var _ log.Handler = &Mock{}
 // New instantiates a new Mock and sets the log.Handler to it
 func New() *Mock {
 	mock := &Mock{
-		RWMutex: &sync.RWMutex{},
+		RWMutex:   &sync.RWMutex{},
-		Logger:  log.Log,
+		Interface: log.Log,
+		Logged:    make([]string, 0),
 	}
 	log.SetHandler(mock)
 	return mock
@@ -60,5 +61,8 @@ func (m *Mock) Check(t testing.TB, wantLogged []string) {
 	t.Helper()
 	m.RLock()
 	defer m.RUnlock()
+	if wantLogged == nil {
+		wantLogged = []string{}
+	}
 	assert.Equal(t, wantLogged, m.Logged)
 }

mocks_test.go

@@ -50,7 +50,7 @@ func TestMock_Check(t *testing.T) {
 			name:   "different",
 			fields: fields{Logged: []string{"same"}},
 			args:   args{wantLogged: []string{"different"}},
-			want:   []string{"\n\tError Trace:\tmocks.go:63\n\t            \t\t\t\tmocks_test.go:63\n\tError:      \tNot equal: \n\t            \texpected: []string{\"different\"}\n\t            \tactual  : []string{\"same\"}\n\t            \t\n\t            \tDiff:\n\t            \t--- Expected\n\t            \t+++ Actual\n\t            \t@@ -1,3 +1,3 @@\n\t            \t ([]string) (len=1) {\n\t            \t- (string) (len=9) \"different\"\n\t            \t+ (string) (len=4) \"same\"\n\t            \t }\n\tTest:       \t\n"},
+			want:   []string{"\n\tError Trace:\tmocks.go:67\n\t            \t\t\t\tmocks_test.go:63\n\tError:      \tNot equal: \n\t            \texpected: []string{\"different\"}\n\t            \tactual  : []string{\"same\"}\n\t            \t\n\t            \tDiff:\n\t            \t--- Expected\n\t            \t+++ Actual\n\t            \t@@ -1,3 +1,3 @@\n\t            \t ([]string) (len=1) {\n\t            \t- (string) (len=9) \"different\"\n\t            \t+ (string) (len=4) \"same\"\n\t            \t }\n\tTest:       \t\n"},
 		},
 	}
 	for _, tt := range tests {
@@ -68,7 +68,7 @@ func TestMock_Check(t *testing.T) {
 
 func TestNew(t *testing.T) {
 	logger := New()
-	logger.Logger.Info("logging")
+	logger.Info("logging")
 	logger.Check(t, []string{"info: logging"})
 }