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