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hypercat_test.go
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hypercat_test.go
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package hypercat
import (
"encoding/json"
"reflect"
"strings"
"testing"
)
func TestHypercatConstructor(t *testing.T) {
catalogue := NewHypercat("description")
if catalogue.Description != "description" {
t.Errorf("Hypercat creation error, expected '%v' got '%v'", "description", catalogue.Description)
}
if catalogue.ContentType != HypercatMediaType {
t.Errorf("Hypercat creation error, should set ContentType to '%v'", HypercatMediaType)
}
m := Metadata{}
if !reflect.DeepEqual(catalogue.Metadata, m) {
t.Errorf("Hypercat creation error, expected '%v' got '%v'", m, catalogue.Metadata)
}
}
func TestAddRelToCatalogue(t *testing.T) {
cat := NewHypercat("description")
if len(cat.Metadata) != 0 {
t.Errorf("Catalogue metadata length should be 0")
}
cat.AddRel("relation", "value")
if len(cat.Metadata) != 1 {
t.Errorf("Catalogue metadata length should be 1")
}
rel := Rel{Rel: "relation", Val: "value"}
if !reflect.DeepEqual(rel, cat.Metadata[0]) {
t.Errorf("Expected Catalogue metadata item '%v', got '%v'", rel, cat.Metadata[0])
}
}
func TestReplaceRelOnCatalogue(t *testing.T) {
cat := NewHypercat("description")
cat.AddRel("relation", "value")
if len(cat.Metadata) != 1 {
t.Errorf("Catalogue metadata length should be 1")
}
cat.ReplaceRel("relation", "newvalue")
if len(cat.Metadata) != 1 {
t.Errorf("Catalogue metadata length should be 1")
}
rel := Rel{Rel: "relation", Val: "newvalue"}
if !reflect.DeepEqual(rel, cat.Metadata[0]) {
t.Errorf("Expected Catalogue metadata '%v', got '%v'", rel, cat.Metadata[0])
}
}
func TestAddItem(t *testing.T) {
cat := NewHypercat("Catalogue description")
item := NewItem("/foo", "Item description")
if len(cat.Items) != 0 {
t.Errorf("Catalogue initial items length should be 0, got '%v'", len(cat.Items))
}
err := cat.AddItem(item)
if err != nil {
t.Errorf("Error adding item to catalogue: %v", err)
}
if len(cat.Items) != 1 {
t.Errorf("Catalogue initial items length should be 1, got '%v'", len(cat.Items))
}
}
func TestAddDuplicateItem(t *testing.T) {
cat := NewHypercat("Catalogue description")
item1 := NewItem("/foo", "Item1 description")
err := cat.AddItem(item1)
if err != nil {
t.Errorf("Error adding item to catalogue: %v", err)
}
item2 := NewItem("/foo", "Item2 description")
err = cat.AddItem(item2)
if err == nil {
t.Errorf("Should not be permitted to add duplicate Item to catalogue")
}
}
func TestReplaceItem(t *testing.T) {
cat := NewHypercat("Catalogue description")
item1 := NewItem("/foo", "Item1 description")
err := cat.AddItem(item1)
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
item2 := NewItem("/foo", "Item2 description")
err = cat.ReplaceItem(item2)
if err != nil {
t.Errorf("Error replacing item in catalogue: %v", err)
}
if len(cat.Items) != 1 {
t.Errorf("Catalogue items length should be 1, got '%v'", len(cat.Items))
}
if cat.Items[0].Description != "Item2 description" {
t.Errorf("Item not replaced")
}
}
func TestReplacingMissingItem(t *testing.T) {
cat := NewHypercat("Catalogue description")
item1 := NewItem("/foo", "Item1 description")
err := cat.ReplaceItem(item1)
if err == nil {
t.Errorf("Replacing non existing item should have returned an error")
}
}
func TestHypercatMarshalling(t *testing.T) {
item := NewItem("/cat", "Item description")
var hypercatTests = []struct {
cat Hypercat
expected string
}{
{
*NewHypercat("Catalogue description"),
`{"items":[],"catalogue-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"},{"rel":"urn:X-hypercat:rels:isContentType","val":"` + HypercatMediaType + `"}]}`,
},
{
Hypercat{Items: Items{*item}, Metadata: Metadata{Rel{Rel: "foo", Val: "bar"}}, Description: "Catalogue description"},
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],"catalogue-metadata":[{"rel":"foo","val":"bar"},{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"}]}`,
},
{
Hypercat{Items: Items{}, Metadata: Metadata{Rel{Rel: "foo", Val: "bar"}}, Description: "Catalogue description"},
`{"items":[],"catalogue-metadata":[{"rel":"foo","val":"bar"},{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"}]}`,
},
{
Hypercat{Items: Items{*item}, Description: "Catalogue description"},
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],"catalogue-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"}]}`,
},
}
for _, testcase := range hypercatTests {
bytes, err := json.Marshal(&testcase.cat)
if err != nil {
t.Errorf("Error marshalling Hypercat: %v", err)
}
if string(bytes) != testcase.expected {
t.Errorf("Hypercat marshalling error, expected '%v', got '%v'", testcase.expected, string(bytes))
}
}
}
func TestHypercatUnmarshalParse(t *testing.T) {
item := NewItem("/cat", "Item description")
var unmarshalTests = []struct {
input string
expected Hypercat
}{
{
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],
"catalogue-metadata":[
{"rel":"foo","val":"bar"},
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"},
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
Hypercat{Items: Items{*item}, Metadata: Metadata{Rel{Rel: "foo", Val: "bar"}}, Description: "Catalogue description"},
},
{
`{"items":[],
"catalogue-metadata":[
{"rel":"foo","val":"bar"},
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"},
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
Hypercat{Items: Items{}, Metadata: Metadata{Rel{Rel: "foo", Val: "bar"}}, Description: "Catalogue description"},
},
{
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"},
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
Hypercat{Items: Items{*item}, Description: "Catalogue description"},
},
}
// test normal unmarshalling
for _, testcase := range unmarshalTests {
cat := Hypercat{}
err := json.Unmarshal([]byte(testcase.input), &cat)
if err != nil {
t.Errorf("Unexpected error: %#v", err)
}
if cat.Description != testcase.expected.Description {
t.Errorf("Hypercat unmarshalling error, expected '%v', got '%v'", testcase.expected.Description, cat.Description)
}
}
// test Parse helper
for _, testcase := range unmarshalTests {
cat, err := Parse(strings.NewReader(testcase.input))
if err != nil {
t.Errorf("Hypercat parsing error: '%v'", err)
}
if cat.Description != testcase.expected.Description {
t.Errorf("Hypercat unmarshalling error, expected '%v', got '%v'", testcase.expected.Description, cat.Description)
}
}
}
func TestInvalidHypercatUnmarshalling(t *testing.T) {
invalidInputs := []string{
`{"items":[],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":""}
]}`,
`{"items":[],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
`{"items":[],"catalogue-metadata":[{"rel":"foo","val":"bar"}]}`,
}
for _, testcase := range invalidInputs {
cat := Hypercat{}
err := json.Unmarshal([]byte(testcase), &cat)
if err == nil {
t.Errorf("Hypercat unmarshalling should have reported an error with input: '%v'", testcase)
}
}
}
func TestInvalidParse(t *testing.T) {
var testcases = []string{
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":""},
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Description"},
{"rel":"urn:X-hypercat:rels:isContentType","val":""}
]}`,
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Description"}
]}`,
`{"items":[{"href":"","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"},
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
`{"items":[{"item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Item description"}]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"},
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
`{"items":[{"href":"/cat","item-metadata":[{"rel":"urn:X-hypercat:rels:hasDescription:en","val":""}]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"},
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
`{"items":[{"href":"/cat","item-metadata":[]}],
"catalogue-metadata":[
{"rel":"urn:X-hypercat:rels:hasDescription:en","val":"Catalogue description"},
{"rel":"urn:X-hypercat:rels:isContentType","val":"application/vnd.hypercat.catalogue+json"}
]}`,
}
for _, testcase := range testcases {
_, err := Parse(strings.NewReader(testcase))
if err == nil {
t.Errorf("Hypercat parser should have returned an error for json: '%v'", testcase)
}
}
}
func TestRels(t *testing.T) {
cat := NewHypercat("description")
cat.AddRel("relation1", "value1")
cat.AddRel("relation2", "value2")
cat.AddRel("relation1", "value3")
expected := []string{"relation1", "relation2", "relation1"}
got := cat.Rels()
if !reflect.DeepEqual(expected, got) {
t.Errorf("Item rels error, expected '%v', got '%v'", expected, got)
}
}
func TestVals(t *testing.T) {
cat := NewHypercat("description")
cat.AddRel("relation1", "value1")
cat.AddRel("relation2", "value2")
cat.AddRel("relation1", "value3")
expected := []string{"value1", "value3"}
got := cat.Vals("relation1")
if !reflect.DeepEqual(expected, got) {
t.Errorf("Item Vals error, expected '%v', got '%v'", expected, got)
}
}