github.com/rakutentech/cli@v6.12.5-0.20151006231303-24468b65536e+incompatible/testhelpers/matchers/be_in_display_order.go (about)

     1  package matchers
     2  
     3  import (
     4  	"fmt"
     5  	"strings"
     6  
     7  	"github.com/onsi/gomega"
     8  )
     9  
    10  type OrderMatcher struct {
    11  	expected   [][]string
    12  	failedText string
    13  }
    14  
    15  func BeInDisplayOrder(substrings ...[]string) gomega.OmegaMatcher {
    16  	return &OrderMatcher{
    17  		expected: substrings,
    18  	}
    19  }
    20  
    21  func (matcher *OrderMatcher) Match(actualStr interface{}) (success bool, err error) {
    22  	actual, ok := actualStr.([]string)
    23  	if !ok {
    24  		return false, nil
    25  	}
    26  
    27  	//loop and match, stop at last actual[0] line
    28  	for len(actual) > 1 {
    29  		if matched, msg := matchSingleLine(actual[0], matcher.expected[0]); matched {
    30  			if len(matcher.expected) == 1 {
    31  				return true, nil //no more expected to match, all passed
    32  			}
    33  			matcher.expected = matcher.expected[1:]
    34  		} else if msg != "" {
    35  			matcher.failedText = msg
    36  			return false, nil
    37  		}
    38  		actual = actual[1:]
    39  	}
    40  
    41  	//match the last actual line with the rest of expected
    42  	matched, msg := matchSingleLine(actual[0], matcher.expected[0])
    43  	if matched && len(matcher.expected) == 1 {
    44  		return true, nil
    45  	} else if msg != "" {
    46  		matcher.failedText = msg
    47  		return false, nil
    48  	} else if matched {
    49  		matcher.failedText = matcher.expected[1][0]
    50  		return false, nil
    51  	}
    52  	matcher.failedText = matcher.expected[0][0]
    53  	return false, nil
    54  }
    55  
    56  func matchSingleLine(actual string, expected []string) (bool, string) {
    57  	matched := false
    58  	for i, target := range expected {
    59  		if index := strings.Index(actual, target); index != -1 {
    60  			if i == len(expected)-1 {
    61  				return true, ""
    62  			}
    63  			matched = true
    64  			actual = actual[index+len(target):]
    65  		} else if matched {
    66  			return false, target
    67  		} else {
    68  			return false, ""
    69  		}
    70  	}
    71  	return false, ""
    72  }
    73  
    74  func (matcher *OrderMatcher) FailureMessage(actual interface{}) string {
    75  	actualStrings, ok := actual.([]string)
    76  	if !ok {
    77  		return fmt.Sprintf("Expected actual to be a slice of strings, but it's actually a %T", actual)
    78  	}
    79  
    80  	return fmt.Sprintf("expected to find \"%s\" in display order in actual:\n'%s'\n", matcher.failedText, strings.Join(actualStrings, "\n"))
    81  }
    82  
    83  func (matcher *OrderMatcher) NegatedFailureMessage(actual interface{}) string {
    84  	actualStrings, ok := actual.([]string)
    85  	if !ok {
    86  		return fmt.Sprintf("Expected actual to be a slice of strings, but it's actually a %T", actual)
    87  	}
    88  	return fmt.Sprintf("expected to not find strings in display order in actual:\n'%s'\n", strings.Join(actualStrings, "\n"))
    89  }