Adds more tests

docker/client_test.go

@@ -0,0 +1,84 @@
+package docker
+
+import (
+	"context"
+	"errors"
+	"github.com/docker/docker/api/types"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+type mockedProxy struct {
+	mock.Mock
+	dockerProxy
+}
+
+func (m *mockedProxy) ContainerList(context.Context, types.ContainerListOptions) ([]types.Container, error) {
+	args := m.Called()
+	containers, ok := args.Get(0).([]types.Container)
+	if !ok && args.Get(0) != nil {
+		panic("containers is not of type []types.Container")
+	}
+	return containers, args.Error(1)
+
+}
+func Test_dockerClient_ListContainers_null(t *testing.T) {
+	proxy := mockedProxy{}
+	proxy.On("ContainerList", mock.Anything, mock.Anything).Return(nil, nil)
+	client := &dockerClient{&proxy}
+
+	list, err := client.ListContainers()
+	assert.Empty(t, list, "list should be empty")
+	require.NoError(t, err, "error should not return an error.")
+
+	proxy.AssertExpectations(t)
+}
+
+func Test_dockerClient_ListContainers_error(t *testing.T) {
+	proxy := mockedProxy{}
+	proxy.On("ContainerList", mock.Anything, mock.Anything).Return(nil, errors.New("test"))
+	client := &dockerClient{&proxy}
+
+	list, err := client.ListContainers()
+	assert.Nil(t, list, "list should be nil")
+	require.Error(t, err, "test.")
+
+	proxy.AssertExpectations(t)
+}
+
+func Test_dockerClient_ListContainers_happy(t *testing.T) {
+	containers := []types.Container{
+		{
+			ID:    "abcdefghijklmnopqrst",
+			Names: []string{"/z_test_container"},
+		},
+		{
+			ID:    "1234567890_abcxyzdef",
+			Names: []string{"/a_test_container"},
+		},
+	}
+
+	proxy := mockedProxy{}
+	proxy.On("ContainerList", mock.Anything, mock.Anything).Return(containers, nil)
+	client := &dockerClient{&proxy}
+
+	list, err := client.ListContainers()
+	require.NoError(t, err, "error should not return an error.")
+
+	assert.Equal(t, list, []Container{
+		{
+			ID:    "1234567890_a",
+			Name:  "a_test_container",
+			Names: []string{"/a_test_container"},
+		},
+		{
+			ID:    "abcdefghijkl",
+			Name:  "z_test_container",
+			Names: []string{"/z_test_container"},
+		},
+	})
+
+	proxy.AssertExpectations(t)
+}