54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
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// Copyright 2011 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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"errors"
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"fmt"
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)
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// Not returns a matcher that inverts the set of values matched by the wrapped
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// matcher. It does not transform the result for values for which the wrapped
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// matcher returns a fatal error.
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func Not(m Matcher) Matcher {
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return ¬Matcher{m}
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}
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type notMatcher struct {
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wrapped Matcher
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}
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func (m *notMatcher) Matches(c interface{}) (err error) {
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err = m.wrapped.Matches(c)
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// Did the wrapped matcher say yes?
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if err == nil {
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return errors.New("")
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}
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// Did the wrapped matcher return a fatal error?
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if _, isFatal := err.(*FatalError); isFatal {
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return err
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}
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// The wrapped matcher returned a non-fatal error.
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return nil
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}
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func (m *notMatcher) Description() string {
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return fmt.Sprintf("not(%s)", m.wrapped.Description())
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}
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