Replace use of env test util with standard library call

As of Go 1.17, `Setenv` can be used to set environment variables
specific to a single test. This also removes a package which gets
vendored just for this.

Signed-off-by: Derek McGowan <derek@mcg.dev>

client/client_test.go

@@ -15,7 +15,6 @@ import (
 	"github.com/docker/docker/api/types"
 	"gotest.tools/v3/assert"
 	is "gotest.tools/v3/assert/cmp"
-	"gotest.tools/v3/env"
 	"gotest.tools/v3/skip"
 )
 
@@ -86,10 +85,11 @@ func TestNewClientWithOpsFromEnv(t *testing.T) {
 		},
 	}
 
-	env.PatchAll(t, nil)
 	for _, tc := range testcases {
 		t.Run(tc.doc, func(t *testing.T) {
-			env.PatchAll(t, tc.envs)
+			for key, value := range tc.envs {
+				t.Setenv(key, value)
+			}
 			client, err := NewClientWithOpts(FromEnv)
 			if tc.expectedError != "" {
 				assert.Check(t, is.Error(err, tc.expectedError))
@@ -228,12 +228,10 @@ func TestParseHostURL(t *testing.T) {
 }
 
 func TestNewClientWithOpsFromEnvSetsDefaultVersion(t *testing.T) {
-	env.PatchAll(t, map[string]string{
+	t.Setenv("DOCKER_HOST", "")
-		"DOCKER_HOST":        "",
+	t.Setenv("DOCKER_API_VERSION", "")
-		"DOCKER_API_VERSION": "",
+	t.Setenv("DOCKER_TLS_VERIFY", "")
-		"DOCKER_TLS_VERIFY":  "",
+	t.Setenv("DOCKER_CERT_PATH", "")
-		"DOCKER_CERT_PATH":   "",
-	})
 
 	client, err := NewClientWithOpts(FromEnv)
 	assert.NilError(t, err)

vendor/gotest.tools/v3/env/env.go

@@ -1,121 +0,0 @@
-/*
-Package env provides functions to test code that read environment variables
-or the current working directory.
-*/
-package env // import "gotest.tools/v3/env"
-
-import (
-	"os"
-	"strings"
-
-	"gotest.tools/v3/assert"
-	"gotest.tools/v3/internal/cleanup"
-)
-
-type helperT interface {
-	Helper()
-}
-
-// Patch changes the value of an environment variable, and returns a
-// function which will reset the the value of that variable back to the
-// previous state.
-//
-// When used with Go 1.14+ the unpatch function will be called automatically
-// when the test ends, unless the TEST_NOCLEANUP env var is set to true.
-//
-// Deprecated: use t.SetEnv
-func Patch(t assert.TestingT, key, value string) func() {
-	if ht, ok := t.(helperT); ok {
-		ht.Helper()
-	}
-	oldValue, envVarExists := os.LookupEnv(key)
-	assert.NilError(t, os.Setenv(key, value))
-	clean := func() {
-		if ht, ok := t.(helperT); ok {
-			ht.Helper()
-		}
-		if !envVarExists {
-			assert.NilError(t, os.Unsetenv(key))
-			return
-		}
-		assert.NilError(t, os.Setenv(key, oldValue))
-	}
-	cleanup.Cleanup(t, clean)
-	return clean
-}
-
-// PatchAll sets the environment to env, and returns a function which will
-// reset the environment back to the previous state.
-//
-// When used with Go 1.14+ the unpatch function will be called automatically
-// when the test ends, unless the TEST_NOCLEANUP env var is set to true.
-func PatchAll(t assert.TestingT, env map[string]string) func() {
-	if ht, ok := t.(helperT); ok {
-		ht.Helper()
-	}
-	oldEnv := os.Environ()
-	os.Clearenv()
-
-	for key, value := range env {
-		assert.NilError(t, os.Setenv(key, value), "setenv %s=%s", key, value)
-	}
-	clean := func() {
-		if ht, ok := t.(helperT); ok {
-			ht.Helper()
-		}
-		os.Clearenv()
-		for key, oldVal := range ToMap(oldEnv) {
-			assert.NilError(t, os.Setenv(key, oldVal), "setenv %s=%s", key, oldVal)
-		}
-	}
-	cleanup.Cleanup(t, clean)
-	return clean
-}
-
-// ToMap takes a list of strings in the format returned by [os.Environ] and
-// returns a mapping of keys to values.
-func ToMap(env []string) map[string]string {
-	result := map[string]string{}
-	for _, raw := range env {
-		key, value := getParts(raw)
-		result[key] = value
-	}
-	return result
-}
-
-func getParts(raw string) (string, string) {
-	if raw == "" {
-		return "", ""
-	}
-	// Environment variables on windows can begin with =
-	// http://blogs.msdn.com/b/oldnewthing/archive/2010/05/06/10008132.aspx
-	parts := strings.SplitN(raw[1:], "=", 2)
-	key := raw[:1] + parts[0]
-	if len(parts) == 1 {
-		return key, ""
-	}
-	return key, parts[1]
-}
-
-// ChangeWorkingDir to the directory, and return a function which restores the
-// previous working directory.
-//
-// When used with Go 1.14+ the previous working directory will be restored
-// automatically when the test ends, unless the TEST_NOCLEANUP env var is set to
-// true.
-func ChangeWorkingDir(t assert.TestingT, dir string) func() {
-	if ht, ok := t.(helperT); ok {
-		ht.Helper()
-	}
-	cwd, err := os.Getwd()
-	assert.NilError(t, err)
-	assert.NilError(t, os.Chdir(dir))
-	clean := func() {
-		if ht, ok := t.(helperT); ok {
-			ht.Helper()
-		}
-		assert.NilError(t, os.Chdir(cwd))
-	}
-	cleanup.Cleanup(t, clean)
-	return clean
-}

vendor/modules.txt

@@ -1684,7 +1684,6 @@ gopkg.in/yaml.v3
 gotest.tools/v3/assert
 gotest.tools/v3/assert/cmp
 gotest.tools/v3/assert/opt
-gotest.tools/v3/env
 gotest.tools/v3/fs
 gotest.tools/v3/golden
 gotest.tools/v3/icmd