vendor update for E2E framework

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/github.com/onsi/gomega/matchers/receive_matcher.go

@@ -0,0 +1,128 @@
+package matchers
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/onsi/gomega/format"
+)
+
+type ReceiveMatcher struct {
+	Arg           interface{}
+	receivedValue reflect.Value
+	channelClosed bool
+}
+
+func (matcher *ReceiveMatcher) Match(actual interface{}) (success bool, err error) {
+	if !isChan(actual) {
+		return false, fmt.Errorf("ReceiveMatcher expects a channel.  Got:\n%s", format.Object(actual, 1))
+	}
+
+	channelType := reflect.TypeOf(actual)
+	channelValue := reflect.ValueOf(actual)
+
+	if channelType.ChanDir() == reflect.SendDir {
+		return false, fmt.Errorf("ReceiveMatcher matcher cannot be passed a send-only channel.  Got:\n%s", format.Object(actual, 1))
+	}
+
+	var subMatcher omegaMatcher
+	var hasSubMatcher bool
+
+	if matcher.Arg != nil {
+		subMatcher, hasSubMatcher = (matcher.Arg).(omegaMatcher)
+		if !hasSubMatcher {
+			argType := reflect.TypeOf(matcher.Arg)
+			if argType.Kind() != reflect.Ptr {
+				return false, fmt.Errorf("Cannot assign a value from the channel:\n%s\nTo:\n%s\nYou need to pass a pointer!", format.Object(actual, 1), format.Object(matcher.Arg, 1))
+			}
+		}
+	}
+
+	winnerIndex, value, open := reflect.Select([]reflect.SelectCase{
+		{Dir: reflect.SelectRecv, Chan: channelValue},
+		{Dir: reflect.SelectDefault},
+	})
+
+	var closed bool
+	var didReceive bool
+	if winnerIndex == 0 {
+		closed = !open
+		didReceive = open
+	}
+	matcher.channelClosed = closed
+
+	if closed {
+		return false, nil
+	}
+
+	if hasSubMatcher {
+		if didReceive {
+			matcher.receivedValue = value
+			return subMatcher.Match(matcher.receivedValue.Interface())
+		}
+		return false, nil
+	}
+
+	if didReceive {
+		if matcher.Arg != nil {
+			outValue := reflect.ValueOf(matcher.Arg)
+
+			if value.Type().AssignableTo(outValue.Elem().Type()) {
+				outValue.Elem().Set(value)
+				return true, nil
+			}
+			if value.Type().Kind() == reflect.Interface && value.Elem().Type().AssignableTo(outValue.Elem().Type()) {
+				outValue.Elem().Set(value.Elem())
+				return true, nil
+			} else {
+				return false, fmt.Errorf("Cannot assign a value from the channel:\n%s\nType:\n%s\nTo:\n%s", format.Object(actual, 1), format.Object(value.Interface(), 1), format.Object(matcher.Arg, 1))
+			}
+
+		}
+
+		return true, nil
+	}
+	return false, nil
+}
+
+func (matcher *ReceiveMatcher) FailureMessage(actual interface{}) (message string) {
+	subMatcher, hasSubMatcher := (matcher.Arg).(omegaMatcher)
+
+	closedAddendum := ""
+	if matcher.channelClosed {
+		closedAddendum = " The channel is closed."
+	}
+
+	if hasSubMatcher {
+		if matcher.receivedValue.IsValid() {
+			return subMatcher.FailureMessage(matcher.receivedValue.Interface())
+		}
+		return "When passed a matcher, ReceiveMatcher's channel *must* receive something."
+	}
+	return format.Message(actual, "to receive something."+closedAddendum)
+}
+
+func (matcher *ReceiveMatcher) NegatedFailureMessage(actual interface{}) (message string) {
+	subMatcher, hasSubMatcher := (matcher.Arg).(omegaMatcher)
+
+	closedAddendum := ""
+	if matcher.channelClosed {
+		closedAddendum = " The channel is closed."
+	}
+
+	if hasSubMatcher {
+		if matcher.receivedValue.IsValid() {
+			return subMatcher.NegatedFailureMessage(matcher.receivedValue.Interface())
+		}
+		return "When passed a matcher, ReceiveMatcher's channel *must* receive something."
+	}
+	return format.Message(actual, "not to receive anything."+closedAddendum)
+}
+
+func (matcher *ReceiveMatcher) MatchMayChangeInTheFuture(actual interface{}) bool {
+	if !isChan(actual) {
+		return false
+	}
+
+	return !matcher.channelClosed
+}