Added all required dependencies

vendor/github.com/smartystreets/assertions/internal/oglematchers/contains.go

@@ -0,0 +1,61 @@
+// Copyright 2012 Aaron Jacobs. All Rights Reserved.
+// Author: aaronjjacobs@gmail.com (Aaron Jacobs)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package oglematchers
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// Return a matcher that matches arrays slices with at least one element that
+// matches the supplied argument. If the argument x is not itself a Matcher,
+// this is equivalent to Contains(Equals(x)).
+func Contains(x interface{}) Matcher {
+	var result containsMatcher
+	var ok bool
+
+	if result.elementMatcher, ok = x.(Matcher); !ok {
+		result.elementMatcher = DeepEquals(x)
+	}
+
+	return &result
+}
+
+type containsMatcher struct {
+	elementMatcher Matcher
+}
+
+func (m *containsMatcher) Description() string {
+	return fmt.Sprintf("contains: %s", m.elementMatcher.Description())
+}
+
+func (m *containsMatcher) Matches(candidate interface{}) error {
+	// The candidate must be a slice or an array.
+	v := reflect.ValueOf(candidate)
+	if v.Kind() != reflect.Slice && v.Kind() != reflect.Array {
+		return NewFatalError("which is not a slice or array")
+	}
+
+	// Check each element.
+	for i := 0; i < v.Len(); i++ {
+		elem := v.Index(i)
+		if matchErr := m.elementMatcher.Matches(elem.Interface()); matchErr == nil {
+			return nil
+		}
+	}
+
+	return fmt.Errorf("")
+}