package docker import ( "reflect" "strconv" "strings" "testing" "github.com/containous/traefik/types" docker "github.com/docker/docker/api/types" "github.com/docker/docker/api/types/container" "github.com/docker/go-connections/nat" "github.com/stretchr/testify/assert" ) func TestDockerGetFrontendName(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(name("foo")), expected: "Host-foo-docker-localhost-0", }, { container: containerJSON(labels(map[string]string{ types.LabelFrontendRule: "Headers:User-Agent,bat/0.1.0", })), expected: "Headers-User-Agent-bat-0-1-0-0", }, { container: containerJSON(labels(map[string]string{ "com.docker.compose.project": "foo", "com.docker.compose.service": "bar", })), expected: "Host-bar-foo-docker-localhost-0", }, { container: containerJSON(labels(map[string]string{ types.LabelFrontendRule: "Host:foo.bar", })), expected: "Host-foo-bar-0", }, { container: containerJSON(labels(map[string]string{ types.LabelFrontendRule: "Path:/test", })), expected: "Path-test-0", }, { container: containerJSON(labels(map[string]string{ types.LabelFrontendRule: "PathPrefix:/test2", })), expected: "PathPrefix-test2-0", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{ Domain: "docker.localhost", } actual := provider.getFrontendName(dockerData, 0) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetFrontendRule(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(name("foo")), expected: "Host:foo.docker.localhost", }, { container: containerJSON(name("bar")), expected: "Host:bar.docker.localhost", }, { container: containerJSON(labels(map[string]string{ types.LabelFrontendRule: "Host:foo.bar", })), expected: "Host:foo.bar", }, { container: containerJSON(labels(map[string]string{ "com.docker.compose.project": "foo", "com.docker.compose.service": "bar", })), expected: "Host:bar.foo.docker.localhost", }, { container: containerJSON(labels(map[string]string{ types.LabelFrontendRule: "Path:/test", })), expected: "Path:/test", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{ Domain: "docker.localhost", } actual := provider.getFrontendRule(dockerData) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetBackend(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(name("foo")), expected: "foo", }, { container: containerJSON(name("bar")), expected: "bar", }, { container: containerJSON(labels(map[string]string{ types.LabelBackend: "foobar", })), expected: "foobar", }, { container: containerJSON(labels(map[string]string{ "com.docker.compose.project": "foo", "com.docker.compose.service": "bar", })), expected: "bar-foo", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{} actual := provider.getBackend(dockerData) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetIPAddress(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(withNetwork("testnet", ipv4("10.11.12.13"))), expected: "10.11.12.13", }, { container: containerJSON( labels(map[string]string{ labelDockerNetwork: "testnet", }), withNetwork("testnet", ipv4("10.11.12.13")), ), expected: "10.11.12.13", }, { container: containerJSON( labels(map[string]string{ labelDockerNetwork: "testnet2", }), withNetwork("testnet", ipv4("10.11.12.13")), withNetwork("testnet2", ipv4("10.11.12.14")), ), expected: "10.11.12.14", }, { container: containerJSON( networkMode("host"), withNetwork("testnet", ipv4("10.11.12.13")), withNetwork("testnet2", ipv4("10.11.12.14")), ), expected: "127.0.0.1", }, { container: containerJSON( networkMode("host"), ), expected: "127.0.0.1", }, { container: containerJSON( networkMode("host"), nodeIP("10.0.0.5"), ), expected: "10.0.0.5", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{} actual := provider.getIPAddress(dockerData) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetPort(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(name("foo")), expected: "", }, { container: containerJSON(ports(nat.PortMap{ "80/tcp": {}, })), expected: "80", }, { container: containerJSON(ports(nat.PortMap{ "80/tcp": {}, "443/tcp": {}, })), expected: "80", }, { container: containerJSON(labels(map[string]string{ types.LabelPort: "8080", })), expected: "8080", }, { container: containerJSON(labels(map[string]string{ types.LabelPort: "8080", }), ports(nat.PortMap{ "80/tcp": {}, })), expected: "8080", }, { container: containerJSON(labels(map[string]string{ types.LabelPort: "8080", }), ports(nat.PortMap{ "8080/tcp": {}, "80/tcp": {}, })), expected: "8080", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{} actual := provider.getPort(dockerData) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetWeight(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(), expected: "0", }, { container: containerJSON(labels(map[string]string{ types.LabelWeight: "10", })), expected: "10", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{} actual := provider.getWeight(dockerData) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetDomain(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(), expected: "docker.localhost", }, { container: containerJSON(labels(map[string]string{ types.LabelDomain: "foo.bar", })), expected: "foo.bar", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{ Domain: "docker.localhost", } actual := provider.getDomain(dockerData) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetProtocol(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(), expected: "http", }, { container: containerJSON(labels(map[string]string{ types.LabelProtocol: "https", })), expected: "https", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{} actual := provider.getProtocol(dockerData) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetPassHostHeader(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(), expected: "true", }, { container: containerJSON(labels(map[string]string{ types.LabelFrontendPassHostHeader: "false", })), expected: "false", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{} actual := provider.getPassHostHeader(dockerData) if actual != e.expected { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetWhitelistSourceRange(t *testing.T) { containers := []struct { desc string container docker.ContainerJSON expected []string }{ { desc: "no whitelist-label", container: containerJSON(), expected: nil, }, { desc: "whitelist-label with empty string", container: containerJSON(labels(map[string]string{ types.LabelTraefikFrontendWhitelistSourceRange: "", })), expected: nil, }, { desc: "whitelist-label with IPv4 mask", container: containerJSON(labels(map[string]string{ types.LabelTraefikFrontendWhitelistSourceRange: "1.2.3.4/16", })), expected: []string{ "1.2.3.4/16", }, }, { desc: "whitelist-label with IPv6 mask", container: containerJSON(labels(map[string]string{ types.LabelTraefikFrontendWhitelistSourceRange: "fe80::/16", })), expected: []string{ "fe80::/16", }, }, { desc: "whitelist-label with multiple masks", container: containerJSON(labels(map[string]string{ types.LabelTraefikFrontendWhitelistSourceRange: "1.1.1.1/24, 1234:abcd::42/32", })), expected: []string{ "1.1.1.1/24", "1234:abcd::42/32", }, }, } for _, e := range containers { e := e t.Run(e.desc, func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) provider := &Provider{} actual := provider.getWhitelistSourceRange(dockerData) if !reflect.DeepEqual(actual, e.expected) { t.Errorf("expected %q, got %q", e.expected, actual) } }) } } func TestDockerGetLabel(t *testing.T) { containers := []struct { container docker.ContainerJSON expected string }{ { container: containerJSON(), expected: "label not found:", }, { container: containerJSON(labels(map[string]string{ "foo": "bar", })), expected: "", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) label, err := getLabel(dockerData, "foo") if e.expected != "" { if err == nil || !strings.Contains(err.Error(), e.expected) { t.Errorf("expected an error with %q, got %v", e.expected, err) } } else { if label != "bar" { t.Errorf("expected label 'bar', got %s", label) } } }) } } func TestDockerGetLabels(t *testing.T) { containers := []struct { container docker.ContainerJSON expectedLabels map[string]string expectedError string }{ { container: containerJSON(), expectedLabels: map[string]string{}, expectedError: "label not found:", }, { container: containerJSON(labels(map[string]string{ "foo": "fooz", })), expectedLabels: map[string]string{ "foo": "fooz", }, expectedError: "label not found: bar", }, { container: containerJSON(labels(map[string]string{ "foo": "fooz", "bar": "barz", })), expectedLabels: map[string]string{ "foo": "fooz", "bar": "barz", }, expectedError: "", }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) labels, err := getLabels(dockerData, []string{"foo", "bar"}) if !reflect.DeepEqual(labels, e.expectedLabels) { t.Errorf("expect %v, got %v", e.expectedLabels, labels) } if e.expectedError != "" { if err == nil || !strings.Contains(err.Error(), e.expectedError) { t.Errorf("expected an error with %q, got %v", e.expectedError, err) } } }) } } func TestDockerTraefikFilter(t *testing.T) { containers := []struct { container docker.ContainerJSON expected bool provider *Provider }{ { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{}, NetworkSettings: &docker.NetworkSettings{}, }, expected: false, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelEnable: "false", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, expected: false, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelFrontendRule: "Host:foo.bar", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, expected: true, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container-multi-ports", }, Config: &container.Config{}, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, "443/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, expected: true, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{}, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, expected: true, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelPort: "80", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, "443/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, expected: true, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelEnable: "true", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, expected: true, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelEnable: "anything", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, expected: true, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelFrontendRule: "Host:foo.bar", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: true, }, expected: true, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{}, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: false, }, expected: false, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelEnable: "true", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ Domain: "test", ExposedByDefault: false, }, expected: true, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelEnable: "true", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ ExposedByDefault: false, }, expected: false, }, { container: docker.ContainerJSON{ ContainerJSONBase: &docker.ContainerJSONBase{ Name: "container", }, Config: &container.Config{ Labels: map[string]string{ types.LabelEnable: "true", types.LabelFrontendRule: "Host:i.love.this.host", }, }, NetworkSettings: &docker.NetworkSettings{ NetworkSettingsBase: docker.NetworkSettingsBase{ Ports: nat.PortMap{ "80/tcp": {}, }, }, }, }, provider: &Provider{ ExposedByDefault: false, }, expected: true, }, } for containerID, e := range containers { e := e t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(e.container) actual := e.provider.containerFilter(dockerData) if actual != e.expected { t.Errorf("expected %v for %+v, got %+v", e.expected, e, actual) } }) } } func TestDockerLoadDockerConfig(t *testing.T) { cases := []struct { containers []docker.ContainerJSON expectedFrontends map[string]*types.Frontend expectedBackends map[string]*types.Backend }{ { containers: []docker.ContainerJSON{}, expectedFrontends: map[string]*types.Frontend{}, expectedBackends: map[string]*types.Backend{}, }, { containers: []docker.ContainerJSON{ containerJSON( name("test"), ports(nat.PortMap{ "80/tcp": {}, }), withNetwork("bridge", ipv4("127.0.0.1")), ), }, expectedFrontends: map[string]*types.Frontend{ "frontend-Host-test-docker-localhost-0": { Backend: "backend-test", PassHostHeader: true, EntryPoints: []string{}, BasicAuth: []string{}, Redirect: "", Routes: map[string]types.Route{ "route-frontend-Host-test-docker-localhost-0": { Rule: "Host:test.docker.localhost", }, }, }, }, expectedBackends: map[string]*types.Backend{ "backend-test": { Servers: map[string]types.Server{ "server-test": { URL: "http://127.0.0.1:80", Weight: 0, }, }, CircuitBreaker: nil, }, }, }, { containers: []docker.ContainerJSON{ containerJSON( name("test1"), labels(map[string]string{ types.LabelBackend: "foobar", types.LabelFrontendEntryPoints: "http,https", types.LabelFrontendAuthBasic: "test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/,test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0", types.LabelFrontendRedirect: "https", }), ports(nat.PortMap{ "80/tcp": {}, }), withNetwork("bridge", ipv4("127.0.0.1")), ), containerJSON( name("test2"), labels(map[string]string{ types.LabelBackend: "foobar", }), ports(nat.PortMap{ "80/tcp": {}, }), withNetwork("bridge", ipv4("127.0.0.1")), ), }, expectedFrontends: map[string]*types.Frontend{ "frontend-Host-test1-docker-localhost-0": { Backend: "backend-foobar", PassHostHeader: true, EntryPoints: []string{"http", "https"}, BasicAuth: []string{"test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/", "test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0"}, Redirect: "https", Routes: map[string]types.Route{ "route-frontend-Host-test1-docker-localhost-0": { Rule: "Host:test1.docker.localhost", }, }, }, "frontend-Host-test2-docker-localhost-1": { Backend: "backend-foobar", PassHostHeader: true, EntryPoints: []string{}, BasicAuth: []string{}, Redirect: "", Routes: map[string]types.Route{ "route-frontend-Host-test2-docker-localhost-1": { Rule: "Host:test2.docker.localhost", }, }, }, }, expectedBackends: map[string]*types.Backend{ "backend-foobar": { Servers: map[string]types.Server{ "server-test1": { URL: "http://127.0.0.1:80", Weight: 0, }, "server-test2": { URL: "http://127.0.0.1:80", Weight: 0, }, }, CircuitBreaker: nil, }, }, }, { containers: []docker.ContainerJSON{ containerJSON( name("test1"), labels(map[string]string{ types.LabelBackend: "foobar", types.LabelFrontendEntryPoints: "http,https", types.LabelBackendMaxconnAmount: "1000", types.LabelBackendMaxconnExtractorfunc: "somethingelse", types.LabelBackendLoadbalancerMethod: "drr", types.LabelBackendCircuitbreakerExpression: "NetworkErrorRatio() > 0.5", }), ports(nat.PortMap{ "80/tcp": {}, }), withNetwork("bridge", ipv4("127.0.0.1")), ), }, expectedFrontends: map[string]*types.Frontend{ "frontend-Host-test1-docker-localhost-0": { Backend: "backend-foobar", PassHostHeader: true, EntryPoints: []string{"http", "https"}, BasicAuth: []string{}, Redirect: "", Routes: map[string]types.Route{ "route-frontend-Host-test1-docker-localhost-0": { Rule: "Host:test1.docker.localhost", }, }, }, }, expectedBackends: map[string]*types.Backend{ "backend-foobar": { Servers: map[string]types.Server{ "server-test1": { URL: "http://127.0.0.1:80", Weight: 0, }, }, CircuitBreaker: &types.CircuitBreaker{ Expression: "NetworkErrorRatio() > 0.5", }, LoadBalancer: &types.LoadBalancer{ Method: "drr", }, MaxConn: &types.MaxConn{ Amount: 1000, ExtractorFunc: "somethingelse", }, }, }, }, } for caseID, c := range cases { c := c t.Run(strconv.Itoa(caseID), func(t *testing.T) { t.Parallel() var dockerDataList []dockerData for _, container := range c.containers { dockerData := parseContainer(container) dockerDataList = append(dockerDataList, dockerData) } provider := &Provider{ Domain: "docker.localhost", ExposedByDefault: true, } actualConfig := provider.loadDockerConfig(dockerDataList) // Compare backends if !reflect.DeepEqual(actualConfig.Backends, c.expectedBackends) { t.Errorf("expected %#v, got %#v", c.expectedBackends, actualConfig.Backends) } if !reflect.DeepEqual(actualConfig.Frontends, c.expectedFrontends) { t.Errorf("expected %#v, got %#v", c.expectedFrontends, actualConfig.Frontends) } }) } } func TestDockerHasStickinessLabel(t *testing.T) { testCases := []struct { desc string container docker.ContainerJSON expected bool }{ { desc: "no stickiness-label", container: containerJSON(), expected: false, }, { desc: "stickiness true", container: containerJSON(labels(map[string]string{ types.LabelBackendLoadbalancerStickiness: "true", })), expected: true, }, { desc: "stickiness false", container: containerJSON(labels(map[string]string{ types.LabelBackendLoadbalancerStickiness: "false", })), expected: false, }, } for _, test := range testCases { test := test t.Run(test.desc, func(t *testing.T) { t.Parallel() dockerData := parseContainer(test.container) provider := &Provider{} actual := provider.hasStickinessLabel(dockerData) assert.Equal(t, actual, test.expected) }) } } func TestDockerCheckPortLabels(t *testing.T) { testCases := []struct { container docker.ContainerJSON expectedError bool }{ { container: containerJSON(labels(map[string]string{ types.LabelPort: "80", })), expectedError: false, }, { container: containerJSON(labels(map[string]string{ types.LabelPrefix + "servicename.protocol": "http", types.LabelPrefix + "servicename.port": "80", })), expectedError: false, }, { container: containerJSON(labels(map[string]string{ types.LabelPrefix + "servicename.protocol": "http", types.LabelPort: "80", })), expectedError: false, }, { container: containerJSON(labels(map[string]string{ types.LabelPrefix + "servicename.protocol": "http", })), expectedError: true, }, } for containerID, test := range testCases { test := test t.Run(strconv.Itoa(containerID), func(t *testing.T) { t.Parallel() dockerData := parseContainer(test.container) err := checkServiceLabelPort(dockerData) if test.expectedError && err == nil { t.Error("expected an error but got nil") } else if !test.expectedError && err != nil { t.Errorf("expected no error, got %q", err) } }) } }