Switch to ginkgo/gomega for tests

This switches over to ginkgo/gomega for tests, which makes writing
certain tests easier/more fluent in the future.

vendor/github.com/onsi/ginkgo/internal/testingtproxy/testing_t_proxy.go

@@ -0,0 +1,76 @@
+package testingtproxy
+
+import (
+	"fmt"
+	"io"
+)
+
+type failFunc func(message string, callerSkip ...int)
+
+func New(writer io.Writer, fail failFunc, offset int) *ginkgoTestingTProxy {
+	return &ginkgoTestingTProxy{
+		fail:   fail,
+		offset: offset,
+		writer: writer,
+	}
+}
+
+type ginkgoTestingTProxy struct {
+	fail   failFunc
+	offset int
+	writer io.Writer
+}
+
+func (t *ginkgoTestingTProxy) Error(args ...interface{}) {
+	t.fail(fmt.Sprintln(args...), t.offset)
+}
+
+func (t *ginkgoTestingTProxy) Errorf(format string, args ...interface{}) {
+	t.fail(fmt.Sprintf(format, args...), t.offset)
+}
+
+func (t *ginkgoTestingTProxy) Fail() {
+	t.fail("failed", t.offset)
+}
+
+func (t *ginkgoTestingTProxy) FailNow() {
+	t.fail("failed", t.offset)
+}
+
+func (t *ginkgoTestingTProxy) Fatal(args ...interface{}) {
+	t.fail(fmt.Sprintln(args...), t.offset)
+}
+
+func (t *ginkgoTestingTProxy) Fatalf(format string, args ...interface{}) {
+	t.fail(fmt.Sprintf(format, args...), t.offset)
+}
+
+func (t *ginkgoTestingTProxy) Log(args ...interface{}) {
+	fmt.Fprintln(t.writer, args...)
+}
+
+func (t *ginkgoTestingTProxy) Logf(format string, args ...interface{}) {
+	t.Log(fmt.Sprintf(format, args...))
+}
+
+func (t *ginkgoTestingTProxy) Failed() bool {
+	return false
+}
+
+func (t *ginkgoTestingTProxy) Parallel() {
+}
+
+func (t *ginkgoTestingTProxy) Skip(args ...interface{}) {
+	fmt.Println(args...)
+}
+
+func (t *ginkgoTestingTProxy) Skipf(format string, args ...interface{}) {
+	t.Skip(fmt.Sprintf(format, args...))
+}
+
+func (t *ginkgoTestingTProxy) SkipNow() {
+}
+
+func (t *ginkgoTestingTProxy) Skipped() bool {
+	return false
+}