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gomega.go
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gomega.go
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package resource
import (
"fmt"
"sort"
"github.com/onsi/gomega"
"github.com/onsi/gomega/types"
)
func matcherToGomegaMatcher(matcher interface{}) (types.GomegaMatcher, error) {
switch x := matcher.(type) {
case string, int, bool, float64:
return gomega.Equal(x), nil
case []interface{}:
var matchers []types.GomegaMatcher
for _, valueI := range x {
if subMatcher, ok := valueI.(types.GomegaMatcher); ok {
matchers = append(matchers, subMatcher)
} else {
matchers = append(matchers, gomega.ContainElement(valueI))
}
}
return gomega.And(matchers...), nil
}
matcher = sanitizeExpectedValue(matcher)
if matcher == nil {
return nil, fmt.Errorf("Missing Required Attribute")
}
matcherMap, ok := matcher.(map[string]interface{})
if !ok {
panic(fmt.Sprintf("Unexpected matcher type: %T\n\n", matcher))
}
var matchType string
var value interface{}
for matchType, value = range matcherMap {
break
}
switch matchType {
case "have-prefix":
return gomega.HavePrefix(value.(string)), nil
case "have-suffix":
return gomega.HaveSuffix(value.(string)), nil
case "match-regexp":
return gomega.MatchRegexp(value.(string)), nil
case "have-len":
value = sanitizeExpectedValue(value)
return gomega.HaveLen(value.(int)), nil
case "have-key-with-value":
subMatchers, err := mapToGomega(value)
if err != nil {
return nil, err
}
for key, val := range subMatchers {
if val == nil {
fmt.Printf("%d is nil", key)
}
}
return gomega.And(subMatchers...), nil
case "have-key":
subMatcher, err := matcherToGomegaMatcher(value)
if err != nil {
return nil, err
}
return gomega.HaveKey(subMatcher), nil
case "contain-element":
subMatcher, err := matcherToGomegaMatcher(value)
if err != nil {
return nil, err
}
return gomega.ContainElement(subMatcher), nil
case "not":
subMatcher, err := matcherToGomegaMatcher(value)
if err != nil {
return nil, err
}
return gomega.Not(subMatcher), nil
case "consist-of":
subMatchers, err := sliceToGomega(value)
if err != nil {
return nil, err
}
var interfaceSlice []interface{}
for _, d := range subMatchers {
interfaceSlice = append(interfaceSlice, d)
}
return gomega.ConsistOf(interfaceSlice...), nil
case "and":
subMatchers, err := sliceToGomega(value)
if err != nil {
return nil, err
}
return gomega.And(subMatchers...), nil
case "or":
subMatchers, err := sliceToGomega(value)
if err != nil {
return nil, err
}
return gomega.Or(subMatchers...), nil
case "gt", "ge", "lt", "le":
// Golang json escapes '>', '<' symbols, so we use 'gt', 'le' instead
comparator := map[string]string{
"gt": ">",
"ge": ">=",
"lt": "<",
"le": "<=",
}[matchType]
return gomega.BeNumerically(comparator, value), nil
default:
return nil, fmt.Errorf("Unknown matcher: %s", matchType)
}
}
func mapToGomega(value interface{}) (subMatchers []types.GomegaMatcher, err error) {
valueI, ok := value.(map[string]interface{})
if !ok {
return nil, fmt.Errorf("Matcher expected map, got: %t", value)
}
// Get keys
keys := []string{}
for key, _ := range valueI {
keys = append(keys, key)
}
// Iterate through keys in a deterministic way, since ranging over a map
// does not guarantee order
sort.Strings(keys)
for _, key := range keys {
val := valueI[key]
val, err = matcherToGomegaMatcher(val)
if err != nil {
return
}
subMatcher := gomega.HaveKeyWithValue(key, val)
subMatchers = append(subMatchers, subMatcher)
}
return
}
func sliceToGomega(value interface{}) ([]types.GomegaMatcher, error) {
valueI, ok := value.([]interface{})
if !ok {
return nil, fmt.Errorf("Matcher expected array, got: %t", value)
}
var subMatchers []types.GomegaMatcher
for _, v := range valueI {
subMatcher, err := matcherToGomegaMatcher(v)
if err != nil {
return nil, err
}
subMatchers = append(subMatchers, subMatcher)
}
return subMatchers, nil
}
// Normalize expectedValue so json and yaml are the same
func sanitizeExpectedValue(i interface{}) interface{} {
if e, ok := i.(float64); ok {
return int(e)
}
if e, ok := i.(map[interface{}]interface{}); ok {
out := make(map[string]interface{})
for k, v := range e {
ks, ok := k.(string)
if !ok {
panic(fmt.Sprintf("Matcher key type not string: %T\n\n", k))
}
out[ks] = sanitizeExpectedValue(v)
}
return out
}
return i
}