Post migration fixes

Fix tests that failed when using cmp.Compare()
internal/test/testutil/assert
InDelta
Fix DeepEqual with kube metav1.Time
Convert some ErrorContains to assert

Signed-off-by: Daniel Nephin <dnephin@docker.com>

cli/command/container/attach_test.go

@@ -7,7 +7,6 @@ import (
 
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/internal/test"
-	"github.com/docker/cli/internal/test/testutil"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
 	"github.com/gotestyourself/gotestyourself/assert"
@@ -75,7 +74,7 @@ func TestNewAttachCommandErrors(t *testing.T) {
 		cmd := NewAttachCommand(test.NewFakeCli(&fakeClient{inspectFunc: tc.containerInspectFunc}))
 		cmd.SetOutput(ioutil.Discard)
 		cmd.SetArgs(tc.args)
-		testutil.ErrorContains(t, cmd.Execute(), tc.expectedError)
+		assert.ErrorContains(t, cmd.Execute(), tc.expectedError)
 	}
 }
 
@@ -102,9 +101,7 @@ func TestGetExitStatus(t *testing.T) {
 		},
 		{
 			result: &container.ContainerWaitOKBody{
-				Error: &container.ContainerWaitOKBodyError{
+				Error: &container.ContainerWaitOKBodyError{expectedErr.Error()},
-					expectedErr.Error(),
-				},
 			},
 			expectedError: expectedErr,
 		},
@@ -124,6 +121,10 @@ func TestGetExitStatus(t *testing.T) {
 			resultC <- *testcase.result
 		}
 		err := getExitStatus(errC, resultC)
-		assert.Check(t, is.DeepEqual(testcase.expectedError, err))
+		if testcase.expectedError == nil {
+			assert.Check(t, err)
+		} else {
+			assert.Check(t, is.Error(err, testcase.expectedError.Error()))
+		}
 	}
 }

cli/command/container/create_test.go

@@ -10,10 +10,10 @@ import (
 	"testing"
 
 	"github.com/docker/cli/internal/test"
-	"github.com/docker/cli/internal/test/testutil"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/api/types/network"
+	"github.com/google/go-cmp/cmp"
 	"github.com/gotestyourself/gotestyourself/assert"
 	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 	"github.com/gotestyourself/gotestyourself/fs"
@@ -23,7 +23,7 @@ import (
 func TestCIDFileNoOPWithNoFilename(t *testing.T) {
 	file, err := newCIDFile("")
 	assert.NilError(t, err)
-	assert.Check(t, is.DeepEqual(&cidFile{}, file))
+	assert.DeepEqual(t, &cidFile{}, file, cmp.AllowUnexported(cidFile{}))
 
 	assert.Check(t, file.Write("id"))
 	assert.Check(t, file.Close())
@@ -34,7 +34,7 @@ func TestNewCIDFileWhenFileAlreadyExists(t *testing.T) {
 	defer tempfile.Remove()
 
 	_, err := newCIDFile(tempfile.Path())
-	testutil.ErrorContains(t, err, "Container ID file found")
+	assert.ErrorContains(t, err, "Container ID file found")
 }
 
 func TestCIDFileCloseWithNoWrite(t *testing.T) {

cli/command/container/exec_test.go

@@ -198,7 +198,7 @@ func TestGetExecExitStatus(t *testing.T) {
 			},
 		}
 		err := getExecExitStatus(context.Background(), client, execID)
-		assert.Check(t, is.DeepEqual(testcase.expectedError, err))
+		assert.Check(t, is.Equal(testcase.expectedError, err))
 	}
 }
 

cli/command/container/opts_test.go

@@ -67,7 +67,7 @@ func setupRunFlags() (*pflag.FlagSet, *containerOptions) {
 
 func parseMustError(t *testing.T, args string) {
 	_, _, _, err := parseRun(strings.Split(args+" ubuntu bash", " "))
-	assert.Check(t, is.ErrorContains(err, ""), args)
+	assert.ErrorContains(t, err, "", args)
 }
 
 func mustParse(t *testing.T, args string) (*container.Config, *container.HostConfig) {

cli/command/container/stats_helpers_test.go

@@ -1,6 +1,7 @@
 package container
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/docker/docker/api/types"
@@ -15,7 +16,7 @@ func TestCalculateMemUsageUnixNoCache(t *testing.T) {
 	result := calculateMemUsageUnixNoCache(stats)
 
 	// Then
-	assert.InDelta(t, 100.0, result, 1e-6)
+	assert.Assert(t, inDelta(100.0, result, 1e-6))
 }
 
 func TestCalculateMemPercentUnixNoCache(t *testing.T) {
@@ -27,10 +28,20 @@ func TestCalculateMemPercentUnixNoCache(t *testing.T) {
 	// When and Then
 	t.Run("Limit is set", func(t *testing.T) {
 		result := calculateMemPercentUnixNoCache(someLimit, used)
-		assert.InDelta(t, 70.0, result, 1e-6)
+		assert.Assert(t, inDelta(70.0, result, 1e-6))
 	})
 	t.Run("No limit, no cgroup data", func(t *testing.T) {
 		result := calculateMemPercentUnixNoCache(noLimit, used)
-		assert.InDelta(t, 0.0, result, 1e-6)
+		assert.Assert(t, inDelta(0.0, result, 1e-6))
 	})
 }
+
+func inDelta(x, y, delta float64) func() (bool, string) {
+	return func() (bool, string) {
+		diff := x - y
+		if diff < -delta || diff > delta {
+			return false, fmt.Sprintf("%f != %f within %f", x, y, delta)
+		}
+		return true, ""
+	}
+}

cli/command/formatter/checkpoint_test.go

@@ -6,7 +6,6 @@ import (
 
 	"github.com/docker/docker/api/types"
 	"github.com/gotestyourself/gotestyourself/assert"
-	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 )
 
 func TestCheckpointContextFormatWrite(t *testing.T) {
@@ -47,10 +46,7 @@ checkpoint-3:
 		out := bytes.NewBufferString("")
 		testcase.context.Output = out
 		err := CheckpointWrite(testcase.context, checkpoints)
-		if err != nil {
+		assert.NilError(t, err)
-			assert.Check(t, is.ErrorContains(err, ""), testcase.expected)
+		assert.Equal(t, out.String(), testcase.expected)
-		} else {
-			assert.Check(t, is.Equal(out.String(), testcase.expected))
-		}
 	}
 }

cli/command/formatter/config_test.go

@@ -56,7 +56,7 @@ id_rsa
 		out := bytes.NewBufferString("")
 		testcase.context.Output = out
 		if err := ConfigWrite(testcase.context, configs); err != nil {
-			assert.Check(t, is.ErrorContains(err, ""), testcase.expected)
+			assert.ErrorContains(t, err, testcase.expected)
 		} else {
 			assert.Check(t, is.Equal(out.String(), testcase.expected))
 		}

cli/command/formatter/search_test.go

@@ -155,7 +155,7 @@ result2 5
 		testcase.context.Output = out
 		err := SearchWrite(testcase.context, results, false, 0)
 		if err != nil {
-			assert.Check(t, is.ErrorContains(err, ""), testcase.expected)
+			assert.Check(t, is.ErrorContains(err, testcase.expected))
 		} else {
 			assert.Check(t, is.Equal(out.String(), testcase.expected))
 		}
@@ -192,7 +192,7 @@ result2
 		testcase.context.Output = out
 		err := SearchWrite(testcase.context, results, true, 0)
 		if err != nil {
-			assert.Check(t, is.ErrorContains(err, ""), testcase.expected)
+			assert.Check(t, is.ErrorContains(err, testcase.expected))
 		} else {
 			assert.Check(t, is.Equal(out.String(), testcase.expected))
 		}
@@ -227,7 +227,7 @@ result1
 		testcase.context.Output = out
 		err := SearchWrite(testcase.context, results, false, 6)
 		if err != nil {
-			assert.Check(t, is.ErrorContains(err, ""), testcase.expected)
+			assert.Check(t, is.ErrorContains(err, testcase.expected))
 		} else {
 			assert.Check(t, is.Equal(out.String(), testcase.expected))
 		}

cli/command/formatter/stack_test.go

@@ -57,7 +57,7 @@ bar
 		testcase.context.Output = out
 		err := StackWrite(testcase.context, stacks)
 		if err != nil {
-			assert.Check(t, is.ErrorContains(err, ""), testcase.expected)
+			assert.Check(t, is.ErrorContains(err, testcase.expected))
 		} else {
 			assert.Check(t, is.Equal(out.String(), testcase.expected))
 		}

cli/command/image/build_test.go

@@ -166,8 +166,7 @@ func TestRunBuildFromGitHubSpecialCase(t *testing.T) {
 	cmd.SetArgs([]string{"github.com/docker/no-such-repository"})
 	cmd.SetOutput(ioutil.Discard)
 	err := cmd.Execute()
-	assert.Check(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "unable to prepare context: unable to 'git clone'")
-	assert.Check(t, is.Contains(err.Error(), "unable to prepare context: unable to 'git clone'"))
 }
 
 // TestRunBuildFromLocalGitHubDirNonExistingRepo tests that a local directory

cli/command/network/list_test.go

@@ -1,17 +1,15 @@
 package network
 
 import (
-	"testing"
-
 	"io/ioutil"
-
 	"strings"
+	"testing"
 
 	"github.com/docker/cli/internal/test"
 	. "github.com/docker/cli/internal/test/builders"
-	"github.com/docker/cli/internal/test/testutil"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/filters"
+	"github.com/google/go-cmp/cmp"
 	"github.com/gotestyourself/gotestyourself/assert"
 	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 	"github.com/gotestyourself/gotestyourself/golden"
@@ -39,23 +37,18 @@ func TestNetworkListErrors(t *testing.T) {
 			}),
 		)
 		cmd.SetOutput(ioutil.Discard)
-		testutil.ErrorContains(t, cmd.Execute(), tc.expectedError)
+		assert.ErrorContains(t, cmd.Execute(), tc.expectedError)
-
 	}
 }
 
 func TestNetworkListWithFlags(t *testing.T) {
-
-	filterArgs := filters.NewArgs()
-	filterArgs.Add("image.name", "ubuntu")
-
 	expectedOpts := types.NetworkListOptions{
-		Filters: filterArgs,
+		Filters: filters.NewArgs(filters.Arg("image.name", "ubuntu")),
 	}
 
 	cli := test.NewFakeCli(&fakeClient{
 		networkListFunc: func(ctx context.Context, options types.NetworkListOptions) ([]types.NetworkResource, error) {
-			assert.Check(t, is.DeepEqual(expectedOpts, options), "not expected options error")
+			assert.Check(t, is.DeepEqual(expectedOpts, options, cmp.AllowUnexported(filters.Args{})))
 			return []types.NetworkResource{*NetworkResource(NetworkResourceID("123454321"),
 				NetworkResourceName("network_1"),
 				NetworkResourceDriver("09.7.01"),

cli/command/service/ps_test.go

@@ -8,6 +8,7 @@ import (
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/filters"
 	"github.com/docker/docker/api/types/swarm"
+	"github.com/google/go-cmp/cmp"
 	"github.com/gotestyourself/gotestyourself/assert"
 	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 	"golang.org/x/net/context"
@@ -36,12 +37,13 @@ func TestCreateFilter(t *testing.T) {
 	assert.NilError(t, err)
 	assert.Check(t, is.DeepEqual(notfound, []string{"no such service: notfound"}))
 
-	expected := filters.NewArgs()
+	expected := filters.NewArgs(
-	expected.Add("service", "idmatch")
+		filters.Arg("service", "idmatch"),
-	expected.Add("service", "idprefixmatch")
+		filters.Arg("service", "idprefixmatch"),
-	expected.Add("service", "cccccccc")
+		filters.Arg("service", "cccccccc"),
-	expected.Add("node", "somenode")
+		filters.Arg("node", "somenode"),
-	assert.Check(t, is.DeepEqual(expected, actual))
+	)
+	assert.DeepEqual(t, expected, actual, cmpFilters)
 }
 
 func TestCreateFilterWithAmbiguousIDPrefixError(t *testing.T) {
@@ -108,10 +110,11 @@ func TestRunPSQuiet(t *testing.T) {
 
 func TestUpdateNodeFilter(t *testing.T) {
 	selfNodeID := "foofoo"
-	filter := filters.NewArgs()
+	filter := filters.NewArgs(
-	filter.Add("node", "one")
+		filters.Arg("node", "one"),
-	filter.Add("node", "two")
+		filters.Arg("node", "two"),
-	filter.Add("node", "self")
+		filters.Arg("node", "self"),
+	)
 
 	client := &fakeClient{
 		infoFunc: func(_ context.Context) (types.Info, error) {
@@ -121,9 +124,12 @@ func TestUpdateNodeFilter(t *testing.T) {
 
 	updateNodeFilter(context.Background(), client, filter)
 
-	expected := filters.NewArgs()
+	expected := filters.NewArgs(
-	expected.Add("node", "one")
+		filters.Arg("node", "one"),
-	expected.Add("node", "two")
+		filters.Arg("node", "two"),
-	expected.Add("node", selfNodeID)
+		filters.Arg("node", selfNodeID),
-	assert.Check(t, is.DeepEqual(expected, filter))
+	)
+	assert.DeepEqual(t, expected, filter, cmpFilters)
 }
+
+var cmpFilters = cmp.AllowUnexported(filters.Args{})

cli/command/stack/kubernetes/loader_test.go

@@ -5,6 +5,7 @@ import (
 
 	composetypes "github.com/docker/cli/cli/compose/types"
 	apiv1beta1 "github.com/docker/cli/kubernetes/compose/v1beta1"
+	"github.com/google/go-cmp/cmp"
 	"github.com/gotestyourself/gotestyourself/assert"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
@@ -30,7 +31,7 @@ func TestLoadStack(t *testing.T) {
 			Name: "foo",
 		},
 		Spec: apiv1beta1.StackSpec{
-			ComposeFile: string(`version: "3.1"
+			ComposeFile: `version: "3.1"
 services:
   bar:
     image: bar
@@ -40,7 +41,15 @@ networks: {}
 volumes: {}
 secrets: {}
 configs: {}
-`),
+`,
 		},
-	}, s)
+	}, s, cmpKubeAPITime)
 }
+
+// TODO: this can be removed when k8s.io/apimachinery is updated to > 1.9.0
+var cmpKubeAPITime = cmp.Comparer(func(x, y *metav1.Time) bool {
+	if x == nil || y == nil {
+		return x == y
+	}
+	return x.Time.Equal(y.Time)
+})

cli/command/stack/ps_test.go

@@ -62,7 +62,6 @@ func TestStackPsEmptyStack(t *testing.T) {
 	cmd.SetArgs([]string{"foo"})
 	cmd.SetOutput(ioutil.Discard)
 
-	assert.Check(t, is.ErrorContains(cmd.Execute(), ""))
 	assert.Check(t, is.Error(cmd.Execute(), "nothing found in stack: foo"))
 	assert.Check(t, is.Equal("", fakeCli.OutBuffer().String()))
 }

cli/command/stack/swarm/deploy_bundlefile_test.go

@@ -2,7 +2,6 @@ package swarm
 
 import (
 	"bytes"
-	"fmt"
 	"path/filepath"
 	"testing"
 
@@ -14,27 +13,28 @@ func TestLoadBundlefileErrors(t *testing.T) {
 	testCases := []struct {
 		namespace     string
 		path          string
-		expectedError error
+		expectedError string
 	}{
 		{
 			namespace:     "namespace_foo",
-			expectedError: fmt.Errorf("Bundle %s.dab not found", "namespace_foo"),
+			expectedError: "Bundle namespace_foo.dab not found",
 		},
 		{
 			namespace:     "namespace_foo",
 			path:          "invalid_path",
-			expectedError: fmt.Errorf("Bundle %s not found", "invalid_path"),
+			expectedError: "Bundle invalid_path not found",
-		},
-		{
-			namespace:     "namespace_foo",
-			path:          filepath.Join("testdata", "bundlefile_with_invalid_syntax"),
-			expectedError: fmt.Errorf("Error reading"),
 		},
+		// FIXME: this test never working, testdata file is missing from repo
+		//{
+		//	namespace:     "namespace_foo",
+		//	path:          string(golden.Get(t, "bundlefile_with_invalid_syntax")),
+		//	expectedError: "Error reading",
+		//},
 	}
 
 	for _, tc := range testCases {
 		_, err := loadBundlefile(&bytes.Buffer{}, tc.namespace, tc.path)
-		assert.Check(t, is.ErrorContains(err, ""), tc.expectedError)
+		assert.ErrorContains(t, err, tc.expectedError)
 	}
 }
 

cli/command/system/info_test.go

@@ -227,7 +227,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 	} {
 		cli := test.NewFakeCli(&fakeClient{})
-		assert.Check(t, prettyPrintInfo(cli, tc.dockerInfo))
+		assert.NilError(t, prettyPrintInfo(cli, tc.dockerInfo))
 		golden.Assert(t, cli.OutBuffer().String(), tc.expectedGolden+".golden")
 		if tc.warningsGolden != "" {
 			golden.Assert(t, cli.ErrBuffer().String(), tc.warningsGolden+".golden")

cli/command/system/version_test.go

@@ -23,12 +23,15 @@ func TestVersionWithoutServer(t *testing.T) {
 	})
 	cmd := NewVersionCommand(cli)
 	cmd.SetOutput(cli.Err())
-	assert.Check(t, is.ErrorContains(cmd.Execute(), ""))
+	assert.ErrorContains(t, cmd.Execute(), "no server")
-	assert.Check(t, is.Contains(cleanTabs(cli.OutBuffer().String()), "Client:"))
+	out := cli.OutBuffer().String()
-	assert.NotContains(t, cleanTabs(cli.OutBuffer().String()), "Server:")
+	// TODO: use an assertion like e2e/image/build_test.go:assertBuildOutput()
+	// instead of contains/not contains
+	assert.Check(t, is.Contains(out, "Client:"))
+	assert.Assert(t, !strings.Contains(out, "Server:"), "actual: %s", out)
 }
 
-func fakeServerVersion(ctx context.Context) (types.Version, error) {
+func fakeServerVersion(_ context.Context) (types.Version, error) {
 	return types.Version{
 		Version:    "docker-dev",
 		APIVersion: api.DefaultVersion,
@@ -39,7 +42,7 @@ func TestVersionWithOrchestrator(t *testing.T) {
 	cli := test.NewFakeCli(&fakeClient{serverVersion: fakeServerVersion})
 	cli.SetClientInfo(func() command.ClientInfo { return command.ClientInfo{Orchestrator: "swarm"} })
 	cmd := NewVersionCommand(cli)
-	assert.Check(t, cmd.Execute())
+	assert.NilError(t, cmd.Execute())
 	assert.Check(t, is.Contains(cleanTabs(cli.OutBuffer().String()), "Orchestrator: swarm"))
 }
 

cli/command/trust/key_generate_test.go

@@ -121,19 +121,15 @@ func TestValidateKeyArgs(t *testing.T) {
 	assert.Check(t, err)
 
 	err = validateKeyArgs("a/b", pubKeyCWD)
-	assert.Check(t, is.ErrorContains(err, ""))
+	assert.Error(t, err, "key name \"a/b\" must start with lowercase alphanumeric characters and can include \"-\" or \"_\" after the first character")
-	assert.Check(t, is.Equal(err.Error(), "key name \"a/b\" must start with lowercase alphanumeric characters and can include \"-\" or \"_\" after the first character"))
 
 	err = validateKeyArgs("-", pubKeyCWD)
-	assert.Check(t, is.ErrorContains(err, ""))
+	assert.Error(t, err, "key name \"-\" must start with lowercase alphanumeric characters and can include \"-\" or \"_\" after the first character")
-	assert.Check(t, is.Equal(err.Error(), "key name \"-\" must start with lowercase alphanumeric characters and can include \"-\" or \"_\" after the first character"))
 
 	assert.Check(t, ioutil.WriteFile(filepath.Join(pubKeyCWD, "a.pub"), []byte("abc"), notary.PrivExecPerms))
 	err = validateKeyArgs("a", pubKeyCWD)
-	assert.Check(t, is.ErrorContains(err, ""))
+	assert.Error(t, err, fmt.Sprintf("public key file already exists: \"%s/a.pub\"", pubKeyCWD))
-	assert.Check(t, is.Equal(err.Error(), fmt.Sprintf("public key file already exists: \"%s/a.pub\"", pubKeyCWD)))
 
 	err = validateKeyArgs("a", "/random/dir/")
-	assert.Check(t, is.ErrorContains(err, ""))
+	assert.Error(t, err, "public key path does not exist: \"/random/dir/\"")
-	assert.Check(t, is.Equal(err.Error(), "public key path does not exist: \"/random/dir/\""))
 }

cli/command/trust/key_load_test.go

@@ -184,22 +184,22 @@ func testLoadKeyTooPermissive(t *testing.T, privKeyFixture []byte) {
 
 	// import the key to our keyStorageDir
 	_, err = getPrivKeyBytesFromPath(privKeyFilepath)
-	assert.Check(t, is.ErrorContains(err, ""))
+	expected := fmt.Sprintf("private key file %s must not be readable or writable by others", privKeyFilepath)
-	assert.Check(t, is.Contains(fmt.Sprintf("private key file %s must not be readable or writable by others", privKeyFilepath), err.Error()))
+	assert.Error(t, err, expected)
 
 	privKeyFilepath = filepath.Join(privKeyDir, "privkey667.pem")
 	assert.Check(t, ioutil.WriteFile(privKeyFilepath, privKeyFixture, 0677))
 
 	_, err = getPrivKeyBytesFromPath(privKeyFilepath)
-	assert.Check(t, is.ErrorContains(err, ""))
+	expected = fmt.Sprintf("private key file %s must not be readable or writable by others", privKeyFilepath)
-	assert.Check(t, is.Contains(fmt.Sprintf("private key file %s must not be readable or writable by others", privKeyFilepath), err.Error()))
+	assert.Error(t, err, expected)
 
 	privKeyFilepath = filepath.Join(privKeyDir, "privkey777.pem")
 	assert.Check(t, ioutil.WriteFile(privKeyFilepath, privKeyFixture, 0777))
 
 	_, err = getPrivKeyBytesFromPath(privKeyFilepath)
-	assert.Check(t, is.ErrorContains(err, ""))
+	expected = fmt.Sprintf("private key file %s must not be readable or writable by others", privKeyFilepath)
-	assert.Check(t, is.Contains(fmt.Sprintf("private key file %s must not be readable or writable by others", privKeyFilepath), err.Error()))
+	assert.Error(t, err, expected)
 
 	privKeyFilepath = filepath.Join(privKeyDir, "privkey400.pem")
 	assert.Check(t, ioutil.WriteFile(privKeyFilepath, privKeyFixture, 0400))
@@ -240,6 +240,6 @@ func TestLoadPubKeyFailure(t *testing.T) {
 
 	// import the key to our keyStorageDir - it should fail
 	err = loadPrivKeyBytesToStore(pubKeyBytes, privKeyImporters, pubKeyFilepath, "signer-name", cannedPasswordRetriever)
-	assert.Check(t, is.ErrorContains(err, ""))
+	expected := fmt.Sprintf("provided file %s is not a supported private key - to add a signer's public key use docker trust signer add", pubKeyFilepath)
-	assert.Check(t, is.Contains(fmt.Sprintf("provided file %s is not a supported private key - to add a signer's public key use docker trust signer add", pubKeyFilepath), err.Error()))
+	assert.Error(t, err, expected)
 }

cli/command/trust/sign_test.go

@@ -79,8 +79,7 @@ func TestTrustSignCommandOfflineErrors(t *testing.T) {
 	cmd := newSignCommand(cli)
 	cmd.SetArgs([]string{"reg-name.io/image:tag"})
 	cmd.SetOutput(ioutil.Discard)
-	assert.Check(t, is.ErrorContains(cmd.Execute(), ""))
+	assert.ErrorContains(t, cmd.Execute(), "client is offline")
-	testutil.ErrorContains(t, cmd.Execute(), "client is offline")
 }
 
 func TestGetOrGenerateNotaryKey(t *testing.T) {
@@ -112,7 +111,7 @@ func TestGetOrGenerateNotaryKey(t *testing.T) {
 	assert.Check(t, notaryRepo.GetCryptoService().GetKey(rootKeyB.ID()) != nil)
 
 	// The key we retrieved should be identical to the one we generated
-	assert.Check(t, is.DeepEqual(rootKeyA, rootKeyB))
+	assert.Check(t, is.DeepEqual(rootKeyA.Public(), rootKeyB.Public()))
 
 	// Now also try with a delegation key
 	releasesKey, err := getOrGenerateNotaryKey(notaryRepo, data.RoleName(trust.ReleasesRole))

cli/compose/loader/loader_test.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"io/ioutil"
 	"os"
+	"reflect"
 	"sort"
 	"testing"
 	"time"
@@ -225,16 +226,13 @@ func TestParseAndLoad(t *testing.T) {
 
 func TestInvalidTopLevelObjectType(t *testing.T) {
 	_, err := loadYAML("1")
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Top-level object must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "Top-level object must be a mapping"))
 
 	_, err = loadYAML("\"hello\"")
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Top-level object must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "Top-level object must be a mapping"))
 
 	_, err = loadYAML("[\"hello\"]")
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Top-level object must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "Top-level object must be a mapping"))
 }
 
 func TestNonStringKeys(t *testing.T) {
@@ -244,8 +242,7 @@ version: "3"
   foo:
     image: busybox
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Non-string key at top level: 123")
-	assert.Check(t, is.Contains(err.Error(), "Non-string key at top level: 123"))
 
 	_, err = loadYAML(`
 version: "3"
@@ -255,8 +252,7 @@ services:
   123:
     image: busybox
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Non-string key in services: 123")
-	assert.Check(t, is.Contains(err.Error(), "Non-string key in services: 123"))
 
 	_, err = loadYAML(`
 version: "3"
@@ -269,8 +265,7 @@ networks:
       config:
         - 123: oh dear
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Non-string key in networks.default.ipam.config[0]: 123")
-	assert.Check(t, is.Contains(err.Error(), "Non-string key in networks.default.ipam.config[0]: 123"))
 
 	_, err = loadYAML(`
 version: "3"
@@ -280,8 +275,7 @@ services:
     environment:
       1: FOO
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Non-string key in services.dict-env.environment: 1")
-	assert.Check(t, is.Contains(err.Error(), "Non-string key in services.dict-env.environment: 1"))
 }
 
 func TestSupportedVersion(t *testing.T) {
@@ -309,8 +303,7 @@ services:
   foo:
     image: busybox
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "version")
-	assert.Check(t, is.Contains(err.Error(), "version"))
 
 	_, err = loadYAML(`
 version: "2.0"
@@ -318,8 +311,7 @@ services:
   foo:
     image: busybox
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "version")
-	assert.Check(t, is.Contains(err.Error(), "version"))
 }
 
 func TestInvalidVersion(t *testing.T) {
@@ -329,8 +321,7 @@ services:
   foo:
     image: busybox
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "version must be a string")
-	assert.Check(t, is.Contains(err.Error(), "version must be a string"))
 }
 
 func TestV1Unsupported(t *testing.T) {
@@ -338,7 +329,7 @@ func TestV1Unsupported(t *testing.T) {
 foo:
   image: busybox
 `)
-	assert.Check(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "unsupported Compose file version: 1.0")
 }
 
 func TestNonMappingObject(t *testing.T) {
@@ -348,16 +339,14 @@ services:
   - foo:
       image: busybox
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "services must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "services must be a mapping"))
 
 	_, err = loadYAML(`
 version: "3"
 services:
   foo: busybox
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "services.foo must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "services.foo must be a mapping"))
 
 	_, err = loadYAML(`
 version: "3"
@@ -365,16 +354,14 @@ networks:
   - default:
       driver: bridge
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "networks must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "networks must be a mapping"))
 
 	_, err = loadYAML(`
 version: "3"
 networks:
   default: bridge
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "networks.default must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "networks.default must be a mapping"))
 
 	_, err = loadYAML(`
 version: "3"
@@ -382,16 +369,14 @@ volumes:
   - data:
       driver: local
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "volumes must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "volumes must be a mapping"))
 
 	_, err = loadYAML(`
 version: "3"
 volumes:
   data: local
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "volumes.data must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "volumes.data must be a mapping"))
 }
 
 func TestNonStringImage(t *testing.T) {
@@ -401,8 +386,7 @@ services:
   foo:
     image: ["busybox", "latest"]
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "services.foo.image must be a string")
-	assert.Check(t, is.Contains(err.Error(), "services.foo.image must be a string"))
 }
 
 func TestLoadWithEnvironment(t *testing.T) {
@@ -452,8 +436,7 @@ services:
     environment:
       FOO: ["1"]
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "services.dict-env.environment.FOO must be a string, number or null")
-	assert.Check(t, is.Contains(err.Error(), "services.dict-env.environment.FOO must be a string, number or null"))
 }
 
 func TestInvalidEnvironmentObject(t *testing.T) {
@@ -464,8 +447,7 @@ services:
     image: busybox
     environment: "FOO=1"
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "services.dict-env.environment must be a mapping")
-	assert.Check(t, is.Contains(err.Error(), "services.dict-env.environment must be a mapping"))
 }
 
 func TestLoadWithEnvironmentInterpolation(t *testing.T) {
@@ -736,11 +718,9 @@ services:
       service: foo
 `)
 
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorType(t, err, reflect.TypeOf(&ForbiddenPropertiesError{}))
-	forbidden, ok := err.(*ForbiddenPropertiesError)
-	assert.Check(t, ok, "error type is %T instead of ForbiddenPropertiesError", err)
 
-	props := forbidden.Properties
+	props := err.(*ForbiddenPropertiesError).Properties
 	assert.Check(t, is.Len(props, 2))
 	assert.Check(t, is.Contains(props, "volume_driver"))
 	assert.Check(t, is.Contains(props, "extends"))
@@ -757,8 +737,7 @@ func TestInvalidResource(t *testing.T) {
                 impossible:
                   x: 1
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Additional property impossible is not allowed")
-	assert.Check(t, is.Contains(err.Error(), "Additional property impossible is not allowed"))
 }
 
 func TestInvalidExternalAndDriverCombination(t *testing.T) {
@@ -770,9 +749,8 @@ volumes:
     driver: foobar
 `)
 
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "conflicting parameters \"external\" and \"driver\" specified for volume")
-	assert.Check(t, is.Contains(err.Error(), "conflicting parameters \"external\" and \"driver\" specified for volume"))
+	assert.ErrorContains(t, err, "external_volume")
-	assert.Check(t, is.Contains(err.Error(), "external_volume"))
 }
 
 func TestInvalidExternalAndDirverOptsCombination(t *testing.T) {
@@ -785,9 +763,8 @@ volumes:
       beep: boop
 `)
 
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "conflicting parameters \"external\" and \"driver_opts\" specified for volume")
-	assert.Check(t, is.Contains(err.Error(), "conflicting parameters \"external\" and \"driver_opts\" specified for volume"))
+	assert.ErrorContains(t, err, "external_volume")
-	assert.Check(t, is.Contains(err.Error(), "external_volume"))
 }
 
 func TestInvalidExternalAndLabelsCombination(t *testing.T) {
@@ -800,9 +777,8 @@ volumes:
       - beep=boop
 `)
 
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "conflicting parameters \"external\" and \"labels\" specified for volume")
-	assert.Check(t, is.Contains(err.Error(), "conflicting parameters \"external\" and \"labels\" specified for volume"))
+	assert.ErrorContains(t, err, "external_volume")
-	assert.Check(t, is.Contains(err.Error(), "external_volume"))
 }
 
 func TestLoadVolumeInvalidExternalNameAndNameCombination(t *testing.T) {
@@ -815,9 +791,8 @@ volumes:
       name:	external_name
 `)
 
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "volume.external.name and volume.name conflict; only use volume.name")
-	assert.Check(t, is.Contains(err.Error(), "volume.external.name and volume.name conflict; only use volume.name"))
+	assert.ErrorContains(t, err, "external_volume")
-	assert.Check(t, is.Contains(err.Error(), "external_volume"))
 }
 
 func durationPtr(value time.Duration) *time.Duration {
@@ -890,8 +865,7 @@ services:
         tmpfs:
           size: 10000
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "services.tmpfs.volumes.0 Additional property tmpfs is not allowed")
-	assert.Check(t, is.Contains(err.Error(), "services.tmpfs.volumes.0 Additional property tmpfs is not allowed"))
 }
 
 func TestLoadBindMountSourceMustNotBeEmpty(t *testing.T) {
@@ -971,8 +945,7 @@ services:
         tmpfs:
           size: -1
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "services.tmpfs.volumes.0.tmpfs.size Must be greater than or equal to 0")
-	assert.Check(t, is.Contains(err.Error(), "services.tmpfs.volumes.0.tmpfs.size Must be greater than or equal to 0"))
 }
 
 func TestLoadTmpfsVolumeSizeMustBeInteger(t *testing.T) {
@@ -987,8 +960,7 @@ services:
         tmpfs:
           size: 0.0001
 `)
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "services.tmpfs.volumes.0.tmpfs.size must be a integer")
-	assert.Check(t, is.Contains(err.Error(), "services.tmpfs.volumes.0.tmpfs.size must be a integer"))
 }
 
 func serviceSort(services []types.ServiceConfig) []types.ServiceConfig {
@@ -1295,9 +1267,8 @@ secrets:
       name:	external_name
 `)
 
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "secret.external.name and secret.name conflict; only use secret.name")
-	assert.Check(t, is.Contains(err.Error(), "secret.external.name and secret.name conflict; only use secret.name"))
+	assert.ErrorContains(t, err, "external_secret")
-	assert.Check(t, is.Contains(err.Error(), "external_secret"))
 }
 
 func TestLoadSecretsWarnOnDeprecatedExternalNameVersion35(t *testing.T) {
@@ -1383,7 +1354,6 @@ networks:
       name:	external_name
 `)
 
-	assert.Assert(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "network.external.name and network.name conflict; only use network.name")
-	assert.Check(t, is.Contains(err.Error(), "network.external.name and network.name conflict; only use network.name"))
+	assert.ErrorContains(t, err, "foo")
-	assert.Check(t, is.Contains(err.Error(), "foo"))
 }

cli/compose/schema/schema_test.go

@@ -4,7 +4,6 @@ import (
 	"testing"
 
 	"github.com/gotestyourself/gotestyourself/assert"
-	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 )
 
 type dict map[string]interface{}
@@ -33,8 +32,7 @@ func TestValidateUndefinedTopLevelOption(t *testing.T) {
 	}
 
 	err := Validate(config, "3.0")
-	assert.Check(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "Additional property helicopters is not allowed")
-	assert.Check(t, is.Contains(err.Error(), "Additional property helicopters is not allowed"))
 }
 
 func TestValidateAllowsXTopLevelFields(t *testing.T) {
@@ -77,8 +75,7 @@ func TestValidateInvalidVersion(t *testing.T) {
 	}
 
 	err := Validate(config, "2.1")
-	assert.Check(t, is.ErrorContains(err, ""))
+	assert.ErrorContains(t, err, "unsupported Compose file version: 2.1")
-	assert.Check(t, is.Contains(err.Error(), "unsupported Compose file version: 2.1"))
 }
 
 type array []interface{}

cli/compose/template/template_test.go

@@ -1,9 +1,9 @@
 package template
 
 import (
+	"reflect"
 	"testing"
 
-	"github.com/docker/cli/internal/test/testutil"
 	"github.com/gotestyourself/gotestyourself/assert"
 	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 )
@@ -43,8 +43,7 @@ func TestInvalid(t *testing.T) {
 
 	for _, template := range invalidTemplates {
 		_, err := Substitute(template, defaultMapping)
-		assert.Check(t, is.ErrorContains(err, ""))
+		assert.ErrorContains(t, err, "Invalid template")
-		assert.Check(t, is.Contains(err.Error(), "Invalid template"))
 	}
 }
 
@@ -119,9 +118,8 @@ func TestMandatoryVariableErrors(t *testing.T) {
 
 	for _, tc := range testCases {
 		_, err := Substitute(tc.template, defaultMapping)
-		assert.Check(t, is.ErrorContains(err, ""))
+		assert.ErrorContains(t, err, tc.expectedError)
-		assert.IsType(t, &InvalidTemplateError{}, err)
+		assert.ErrorType(t, err, reflect.TypeOf(&InvalidTemplateError{}))
-		testutil.ErrorContains(t, err, tc.expectedError)
 	}
 }
 

cli/manifest/store/store_test.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/docker/cli/cli/manifest/types"
 	"github.com/docker/distribution/reference"
+	"github.com/google/go-cmp/cmp"
 	"github.com/gotestyourself/gotestyourself/assert"
 	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 )
@@ -92,19 +93,23 @@ func TestStoreSaveAndGet(t *testing.T) {
 	}
 
 	for _, testcase := range testcases {
-		actual, err := store.Get(testcase.listRef, testcase.manifestRef)
+		t.Run(testcase.manifestRef.String(), func(t *testing.T) {
-		if testcase.expectedErr != "" {
+			actual, err := store.Get(testcase.listRef, testcase.manifestRef)
-			assert.Check(t, is.Error(err, testcase.expectedErr))
+			if testcase.expectedErr != "" {
-			assert.Check(t, IsNotFound(err))
+				assert.Check(t, is.Error(err, testcase.expectedErr))
-			continue
+				assert.Check(t, IsNotFound(err))
-		}
+				return
-		if !assert.Check(t, err, testcase.manifestRef.String()) {
+			}
-			continue
+			assert.NilError(t, err)
-		}
+			assert.DeepEqual(t, testcase.expected, actual, cmpReferenceNamed)
-		assert.Check(t, is.DeepEqual(testcase.expected, actual), testcase.manifestRef.String())
+		})
 	}
 }
 
+var cmpReferenceNamed = cmp.Transformer("namedref", func(r reference.Named) string {
+	return r.String()
+})
+
 func TestStoreGetList(t *testing.T) {
 	store, cleanup := newTestStore(t)
 	defer cleanup()

cli/required_test.go

@@ -6,7 +6,6 @@ import (
 	"testing"
 
 	"github.com/gotestyourself/gotestyourself/assert"
-	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 	"github.com/spf13/cobra"
 )
 
@@ -123,9 +122,7 @@ func runTestCases(t *testing.T, testCases []testCase) {
 		cmd.SetOutput(ioutil.Discard)
 
 		err := cmd.Execute()
-
+		assert.ErrorContains(t, err, tc.expectedError)
-		assert.Assert(t, is.ErrorContains(err, ""), "Expected an error: %s", tc.expectedError)
-		assert.Check(t, is.Contains(err.Error(), tc.expectedError))
 	}
 }
 

internal/test/testutil/assert.go

@@ -2,14 +2,18 @@ package testutil
 
 import (
 	"github.com/gotestyourself/gotestyourself/assert"
-	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 )
 
+type helperT interface {
+	Helper()
+}
+
 // ErrorContains checks that the error is not nil, and contains the expected
 // substring.
-// TODO: replace with testify if https://github.com/stretchr/testify/pull/486
+// Deprecated: use assert.Assert(t, cmp.ErrorContains(err, expected))
-// is accepted.
 func ErrorContains(t assert.TestingT, err error, expectedError string) {
-	assert.Assert(t, is.ErrorContains(err, ""))
+	if ht, ok := t.(helperT); ok {
-	assert.Check(t, is.Contains(err.Error(), expectedError))
+		ht.Helper()
+	}
+	assert.ErrorContains(t, err, expectedError)
 }

kubernetes/check_test.go

@@ -22,7 +22,7 @@ func TestGetStackAPIVersion(t *testing.T) {
 	for _, test := range tests {
 		version, err := getAPIVersion(test.groups)
 		if test.err {
-			assert.Assert(t, is.ErrorContains(err, ""))
+			assert.ErrorContains(t, err, "")
 		} else {
 			assert.NilError(t, err)
 		}

templates/templates_test.go

@@ -82,7 +82,7 @@ func TestParseTruncateFunction(t *testing.T) {
 
 		t.Run("Nil Source Test with template: "+testCase.template, func(t *testing.T) {
 			var c bytes.Buffer
-			assert.Check(t, is.ErrorContains(tm.Execute(&c, nil), ""))
+			assert.Check(t, tm.Execute(&c, nil) != nil)
 			assert.Check(t, is.Equal("", c.String()))
 		})
 	}