Add e2e tests

vendor/github.com/onsi/gomega/matchers/match_json_matcher.go

@@ -0,0 +1,135 @@
+package matchers
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"strings"
+
+	"github.com/onsi/gomega/format"
+)
+
+type MatchJSONMatcher struct {
+	JSONToMatch      interface{}
+	firstFailurePath []interface{}
+}
+
+func (matcher *MatchJSONMatcher) Match(actual interface{}) (success bool, err error) {
+	actualString, expectedString, err := matcher.prettyPrint(actual)
+	if err != nil {
+		return false, err
+	}
+
+	var aval interface{}
+	var eval interface{}
+
+	// this is guarded by prettyPrint
+	json.Unmarshal([]byte(actualString), &aval)
+	json.Unmarshal([]byte(expectedString), &eval)
+	var equal bool
+	equal, matcher.firstFailurePath = deepEqual(aval, eval)
+	return equal, nil
+}
+
+func (matcher *MatchJSONMatcher) FailureMessage(actual interface{}) (message string) {
+	actualString, expectedString, _ := matcher.prettyPrint(actual)
+	return formattedMessage(format.Message(actualString, "to match JSON of", expectedString), matcher.firstFailurePath)
+}
+
+func (matcher *MatchJSONMatcher) NegatedFailureMessage(actual interface{}) (message string) {
+	actualString, expectedString, _ := matcher.prettyPrint(actual)
+	return formattedMessage(format.Message(actualString, "not to match JSON of", expectedString), matcher.firstFailurePath)
+}
+
+func formattedMessage(comparisonMessage string, failurePath []interface{}) string {
+	var diffMessage string
+	if len(failurePath) == 0 {
+		diffMessage = ""
+	} else {
+		diffMessage = fmt.Sprintf("\n\nfirst mismatched key: %s", formattedFailurePath(failurePath))
+	}
+	return fmt.Sprintf("%s%s", comparisonMessage, diffMessage)
+}
+
+func formattedFailurePath(failurePath []interface{}) string {
+	formattedPaths := []string{}
+	for i := len(failurePath) - 1; i >= 0; i-- {
+		switch p := failurePath[i].(type) {
+		case int:
+			formattedPaths = append(formattedPaths, fmt.Sprintf(`[%d]`, p))
+		default:
+			if i != len(failurePath)-1 {
+				formattedPaths = append(formattedPaths, ".")
+			}
+			formattedPaths = append(formattedPaths, fmt.Sprintf(`"%s"`, p))
+		}
+	}
+	return strings.Join(formattedPaths, "")
+}
+
+func (matcher *MatchJSONMatcher) prettyPrint(actual interface{}) (actualFormatted, expectedFormatted string, err error) {
+	actualString, ok := toString(actual)
+	if !ok {
+		return "", "", fmt.Errorf("MatchJSONMatcher matcher requires a string, stringer, or []byte.  Got actual:\n%s", format.Object(actual, 1))
+	}
+	expectedString, ok := toString(matcher.JSONToMatch)
+	if !ok {
+		return "", "", fmt.Errorf("MatchJSONMatcher matcher requires a string, stringer, or []byte.  Got expected:\n%s", format.Object(matcher.JSONToMatch, 1))
+	}
+
+	abuf := new(bytes.Buffer)
+	ebuf := new(bytes.Buffer)
+
+	if err := json.Indent(abuf, []byte(actualString), "", "  "); err != nil {
+		return "", "", fmt.Errorf("Actual '%s' should be valid JSON, but it is not.\nUnderlying error:%s", actualString, err)
+	}
+
+	if err := json.Indent(ebuf, []byte(expectedString), "", "  "); err != nil {
+		return "", "", fmt.Errorf("Expected '%s' should be valid JSON, but it is not.\nUnderlying error:%s", expectedString, err)
+	}
+
+	return abuf.String(), ebuf.String(), nil
+}
+
+func deepEqual(a interface{}, b interface{}) (bool, []interface{}) {
+	var errorPath []interface{}
+	if reflect.TypeOf(a) != reflect.TypeOf(b) {
+		return false, errorPath
+	}
+
+	switch a.(type) {
+	case []interface{}:
+		if len(a.([]interface{})) != len(b.([]interface{})) {
+			return false, errorPath
+		}
+
+		for i, v := range a.([]interface{}) {
+			elementEqual, keyPath := deepEqual(v, b.([]interface{})[i])
+			if !elementEqual {
+				return false, append(keyPath, i)
+			}
+		}
+		return true, errorPath
+
+	case map[string]interface{}:
+		if len(a.(map[string]interface{})) != len(b.(map[string]interface{})) {
+			return false, errorPath
+		}
+
+		for k, v1 := range a.(map[string]interface{}) {
+			v2, ok := b.(map[string]interface{})[k]
+			if !ok {
+				return false, errorPath
+			}
+			elementEqual, keyPath := deepEqual(v1, v2)
+			if !elementEqual {
+				return false, append(keyPath, k)
+			}
+		}
+		return true, errorPath
+
+	default:
+		return a == b, errorPath
+	}
+}