75 lines
2.4 KiB
Go
75 lines
2.4 KiB
Go
package matchers
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import (
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"fmt"
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"reflect"
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"strings"
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"github.com/onsi/gomega/format"
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"gopkg.in/yaml.v2"
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)
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type MatchYAMLMatcher struct {
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YAMLToMatch interface{}
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}
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func (matcher *MatchYAMLMatcher) Match(actual interface{}) (success bool, err error) {
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actualString, expectedString, err := matcher.toStrings(actual)
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if err != nil {
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return false, err
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}
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var aval interface{}
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var eval interface{}
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if err := yaml.Unmarshal([]byte(actualString), &aval); err != nil {
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return false, fmt.Errorf("Actual '%s' should be valid YAML, but it is not.\nUnderlying error:%s", actualString, err)
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}
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if err := yaml.Unmarshal([]byte(expectedString), &eval); err != nil {
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return false, fmt.Errorf("Expected '%s' should be valid YAML, but it is not.\nUnderlying error:%s", expectedString, err)
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}
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return reflect.DeepEqual(aval, eval), nil
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}
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func (matcher *MatchYAMLMatcher) FailureMessage(actual interface{}) (message string) {
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actualString, expectedString, _ := matcher.toNormalisedStrings(actual)
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return format.Message(actualString, "to match YAML of", expectedString)
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}
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func (matcher *MatchYAMLMatcher) NegatedFailureMessage(actual interface{}) (message string) {
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actualString, expectedString, _ := matcher.toNormalisedStrings(actual)
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return format.Message(actualString, "not to match YAML of", expectedString)
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}
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func (matcher *MatchYAMLMatcher) toNormalisedStrings(actual interface{}) (actualFormatted, expectedFormatted string, err error) {
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actualString, expectedString, err := matcher.toStrings(actual)
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return normalise(actualString), normalise(expectedString), err
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}
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func normalise(input string) string {
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var val interface{}
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err := yaml.Unmarshal([]byte(input), &val)
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if err != nil {
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panic(err) // guarded by Match
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}
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output, err := yaml.Marshal(val)
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if err != nil {
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panic(err) // guarded by Unmarshal
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}
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return strings.TrimSpace(string(output))
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}
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func (matcher *MatchYAMLMatcher) toStrings(actual interface{}) (actualFormatted, expectedFormatted string, err error) {
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actualString, ok := toString(actual)
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if !ok {
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return "", "", fmt.Errorf("MatchYAMLMatcher matcher requires a string, stringer, or []byte. Got actual:\n%s", format.Object(actual, 1))
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}
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expectedString, ok := toString(matcher.YAMLToMatch)
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if !ok {
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return "", "", fmt.Errorf("MatchYAMLMatcher matcher requires a string, stringer, or []byte. Got expected:\n%s", format.Object(matcher.YAMLToMatch, 1))
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}
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return actualString, expectedString, nil
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}
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