Matthias Andreas Benkard | 832a54e | 2019-01-29 09:27:38 +0100 | [diff] [blame] | 1 | package matchers |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | |
| 6 | "github.com/onsi/gomega/format" |
| 7 | "github.com/onsi/gomega/internal/oraclematcher" |
| 8 | "github.com/onsi/gomega/types" |
| 9 | ) |
| 10 | |
| 11 | type OrMatcher struct { |
| 12 | Matchers []types.GomegaMatcher |
| 13 | |
| 14 | // state |
| 15 | firstSuccessfulMatcher types.GomegaMatcher |
| 16 | } |
| 17 | |
| 18 | func (m *OrMatcher) Match(actual interface{}) (success bool, err error) { |
| 19 | m.firstSuccessfulMatcher = nil |
| 20 | for _, matcher := range m.Matchers { |
| 21 | success, err := matcher.Match(actual) |
| 22 | if err != nil { |
| 23 | return false, err |
| 24 | } |
| 25 | if success { |
| 26 | m.firstSuccessfulMatcher = matcher |
| 27 | return true, nil |
| 28 | } |
| 29 | } |
| 30 | return false, nil |
| 31 | } |
| 32 | |
| 33 | func (m *OrMatcher) FailureMessage(actual interface{}) (message string) { |
| 34 | // not the most beautiful list of matchers, but not bad either... |
| 35 | return format.Message(actual, fmt.Sprintf("To satisfy at least one of these matchers: %s", m.Matchers)) |
| 36 | } |
| 37 | |
| 38 | func (m *OrMatcher) NegatedFailureMessage(actual interface{}) (message string) { |
| 39 | return m.firstSuccessfulMatcher.NegatedFailureMessage(actual) |
| 40 | } |
| 41 | |
| 42 | func (m *OrMatcher) MatchMayChangeInTheFuture(actual interface{}) bool { |
| 43 | /* |
| 44 | Example with 3 matchers: A, B, C |
| 45 | |
| 46 | Match evaluates them: F, T, <?> => T |
| 47 | So match is currently T, what should MatchMayChangeInTheFuture() return? |
| 48 | Seems like it only depends on B, since currently B MUST change to allow the result to become F |
| 49 | |
| 50 | Match eval: F, F, F => F |
| 51 | So match is currently F, what should MatchMayChangeInTheFuture() return? |
| 52 | Seems to depend on ANY of them being able to change to T. |
| 53 | */ |
| 54 | |
| 55 | if m.firstSuccessfulMatcher != nil { |
| 56 | // one of the matchers succeeded.. it must be able to change in order to affect the result |
| 57 | return oraclematcher.MatchMayChangeInTheFuture(m.firstSuccessfulMatcher, actual) |
| 58 | } else { |
| 59 | // so all matchers failed.. Any one of them changing would change the result. |
| 60 | for _, matcher := range m.Matchers { |
| 61 | if oraclematcher.MatchMayChangeInTheFuture(matcher, actual) { |
| 62 | return true |
| 63 | } |
| 64 | } |
| 65 | return false // none of were going to change |
| 66 | } |
| 67 | } |