Files
job-search/internal/api/opportunities_test.go
T
bwilliams 155b84caea Added change batches, so clients can catch up on changed opportunities
Every save that stores new opportunities or new releases records them in a
change batch (migration 00008: opportunity_change_batches and
opportunity_change_batch_opportunities; the opportunities table is
unchanged), as does every change of marks. A batch is named by a random
SHA-256 hash, so it can't be guessed, and ordered by its created_at, which
is kept strictly increasing even if the clock goes back.

GET /api/opportunities pages now carry the newest batch, read before the
page, and GET /api/opportunities?changed_after=<batch> returns every
opportunity changed since that batch, unpaged, with the newest batch it
includes. Offset and limit can't be combined with it, and an unknown batch
is 410 Gone, telling the client to reload the whole list.

OpportunitiesUpdated now carries its save's batch, and a "large" flag: over
50 opportunities, new and updated are left empty and only the summary
counts them, so a big catch-up no longer sends tens of thousands of UUIDs.
2026-10-16 15:25:48 +01:00

437 lines
12 KiB
Go

package api
import (
"context"
"encoding/json"
"fmt"
"net/http"
"net/http/httptest"
"path/filepath"
"strings"
"sync"
"testing"
"time"
"github.com/go-chi/chi/v5"
"git.avsdev.uk/Go/job-search/internal/events"
"git.avsdev.uk/Go/job-search/internal/store"
"git.avsdev.uk/Go/job-search/internal/types"
)
// opportunitiesServer serves the API, given opts as well as its store, over
// a store holding count opportunities, ocds-1 the oldest, and returns its
// URL.
func opportunitiesServer(t *testing.T, count int, opts ...Option) string {
t.Helper()
opportunityStore, err := store.Open(
context.Background(),
filepath.Join(t.TempDir(), "api.db"),
store.WithAutoMigrate(),
)
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() {
opportunityStore.Close()
})
for i := 1; i <= count; i++ {
opportunity := &types.Opportunity{
UUID: fmt.Sprintf("ocds-%d", i),
UUIDType: "ocid",
Title: fmt.Sprintf("Opportunity %d", i),
Source: "FindATender",
// Two codes, shared: ocds-1, ocds-3... have 72000000, the
// others 03000000.
Classifications: []types.ClassificationCode{
{
IsCPV: true,
Code: []string{"03000000", "72000000"}[i%2],
Classification: []string{"Agriculture", "IT services"}[i%2],
},
},
Releases: []types.OpportunityRelease{
{
ReleaseID: "r1",
ReleaseDate: time.Date(2026, 10, i, 12, 0, 0, 0, time.UTC),
JSON: "{}",
},
},
}
_, err := opportunityStore.SaveOpportunity(
context.Background(), opportunity,
)
if err != nil {
t.Fatal(err)
}
}
router := chi.NewRouter()
New(append([]Option{WithStore(opportunityStore)}, opts...)...).Routes(router)
server := httptest.NewServer(router)
t.Cleanup(server.Close)
return server.URL
}
// request sends a bodyless request and decodes a JSON reply into reply (if
// not nil), returning the status.
func request(t *testing.T, method, url string, reply any) int {
t.Helper()
req, err := http.NewRequest(method, url, nil)
if err != nil {
t.Fatal(err)
}
res, err := http.DefaultClient.Do(req)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
if reply != nil && res.StatusCode < 300 {
if err := json.NewDecoder(res.Body).Decode(reply); err != nil {
t.Fatal(err)
}
}
return res.StatusCode
}
// uuids returns the UUIDs of a page's opportunities.
func uuids(page OpportunityPage) []string {
var ids []string
for _, opportunity := range page.Opportunities {
ids = append(ids, opportunity.UUID)
}
return ids
}
// Opportunities are listed newest first, a page at a time.
func TestListOpportunitiesPaging(t *testing.T) {
url := opportunitiesServer(t, 5)
all := []string{"ocds-5", "ocds-4", "ocds-3", "ocds-2", "ocds-1"}
tests := []struct {
query string
want []string
hasMore bool
}{
{"?limit=2", []string{"ocds-5", "ocds-4"}, true},
{"?limit=2&offset=2", []string{"ocds-3", "ocds-2"}, true},
{"?limit=2&offset=4", []string{"ocds-1"}, false},
{"?limit=5", all, false},
{"?offset=10", nil, false},
{"", all, false},
}
for _, tt := range tests {
var page OpportunityPage
status := request(t, "GET", url+"/opportunities"+tt.query, &page)
if status != 200 {
t.Fatalf("%s: status %d", tt.query, status)
}
got := strings.Join(uuids(page), ",")
want := strings.Join(tt.want, ",")
if got != want || page.HasMore != tt.hasMore {
t.Errorf(
"%s: got %s, has_more %v; want %s, %v",
tt.query, got, page.HasMore, want, tt.hasMore,
)
}
}
var page OpportunityPage
request(t, "GET", url+"/opportunities", &page)
if page.Limit != 50 || page.Offset != 0 {
t.Errorf(
"defaults: limit %d, offset %d; want 50, 0", page.Limit, page.Offset,
)
}
}
// An empty page is [] in JSON, not null.
func TestListOpportunitiesEmpty(t *testing.T) {
url := opportunitiesServer(t, 0)
res, err := http.Get(url + "/opportunities")
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
var raw map[string]json.RawMessage
json.NewDecoder(res.Body).Decode(&raw)
if string(raw["opportunities"]) != "[]" {
t.Errorf("opportunities = %s; want []", raw["opportunities"])
}
}
func TestListOpportunitiesBadPaging(t *testing.T) {
url := opportunitiesServer(t, 1)
queries := []string{"?limit=0", "?limit=101", "?limit=x", "?offset=-1"}
for _, query := range queries {
status := request(t, "GET", url+"/opportunities"+query, nil)
if status != 400 {
t.Errorf("%s: status %d; want 400", query, status)
}
}
}
// A page names the newest change batch, and changed_after lists what
// changed after a batch: here, a change of marks.
func TestListChangedOpportunities(t *testing.T) {
url := opportunitiesServer(t, 3)
var page OpportunityPage
request(t, "GET", url+"/opportunities", &page)
if page.Batch == "" {
t.Fatal("the page names no batch")
}
var changed OpportunityPage
status := request(
t, "GET", url+"/opportunities?changed_after="+page.Batch, &changed,
)
if status != 200 || len(changed.Opportunities) != 0 ||
changed.Opportunities == nil || changed.Batch != page.Batch {
t.Fatalf(
"nothing changed: status %d, %+v; want [] and the same batch",
status, changed,
)
}
request(t, "PUT", url+"/opportunities/ocds-2/marks/skipped", nil)
status = request(
t, "GET", url+"/opportunities?changed_after="+page.Batch, &changed,
)
if status != 200 || strings.Join(uuids(changed), ",") != "ocds-2" ||
!changed.Opportunities[0].Marks.Skipped {
t.Fatalf("after a mark: status %d, %+v; want ocds-2", status, changed)
}
if changed.Batch == page.Batch || changed.Limit != 1 || changed.HasMore {
t.Errorf(
"after a mark: batch %q, limit %d, has_more %v; "+
"want a newer batch, 1, false",
changed.Batch, changed.Limit, changed.HasMore,
)
}
var latest OpportunityPage
request(t, "GET", url+"/opportunities?limit=1", &latest)
if latest.Batch != changed.Batch {
t.Errorf("page batch %q; want %q", latest.Batch, changed.Batch)
}
}
// An unknown batch is 410 Gone, and paging can't be used with changed_after.
func TestListChangedOpportunitiesRefused(t *testing.T) {
url := opportunitiesServer(t, 1)
var page OpportunityPage
request(t, "GET", url+"/opportunities", &page)
tests := []struct {
query string
want int
}{
{"?changed_after=unknown", http.StatusGone},
{"?changed_after=", http.StatusGone},
{"?changed_after=" + page.Batch + "&limit=5", http.StatusBadRequest},
{"?offset=0&changed_after=" + page.Batch, http.StatusBadRequest},
}
for _, tt := range tests {
status := request(t, "GET", url+"/opportunities"+tt.query, nil)
if status != tt.want {
t.Errorf("%s: status %d; want %d", tt.query, status, tt.want)
}
}
}
// One opportunity comes with its releases; a missing one is 404.
func TestGetOpportunity(t *testing.T) {
url := opportunitiesServer(t, 2)
var opportunity types.Opportunity
status := request(t, "GET", url+"/opportunities/ocds-2", &opportunity)
if status != 200 {
t.Fatalf("status %d", status)
}
if opportunity.UUID != "ocds-2" || len(opportunity.Releases) != 1 {
t.Errorf("got %+v; want ocds-2 with its release", opportunity)
}
status = request(t, "GET", url+"/opportunities/nope", nil)
if status != 404 {
t.Errorf("missing: status %d; want 404", status)
}
}
// Opportunities are read-only: there is no way to write one.
func TestOpportunitiesReadOnly(t *testing.T) {
url := opportunitiesServer(t, 1)
for _, method := range []string{"POST", "PUT", "PATCH", "DELETE"} {
status := request(t, method, url+"/opportunities/ocds-1", nil)
if status != http.StatusMethodNotAllowed {
t.Errorf("%s: status %d; want 405", method, status)
}
}
if status := request(t, "POST", url+"/opportunities", nil); status != 405 {
t.Errorf("POST /opportunities: status %d; want 405", status)
}
}
// A mark is set with PUT and cleared with DELETE, leaving the others, and
// both reply with all the marks.
func TestChangeMark(t *testing.T) {
url := opportunitiesServer(t, 1)
marks := url + "/opportunities/ocds-1/marks/"
var got types.OpportunityMarks
request(t, "PUT", marks+"interested", &got)
request(t, "PUT", marks+"bid_submitted", &got)
if !got.Interested || !got.BidSubmitted || got.UUID != "ocds-1" {
t.Fatalf("after two PUTs: %+v", got)
}
request(t, "DELETE", marks+"interested", &got)
if got.Interested || !got.BidSubmitted {
t.Errorf("after DELETE: %+v; want only bid_submitted", got)
}
// The change is stored, and setting a set mark again is harmless.
request(t, "PUT", marks+"bid_submitted", &got)
var opportunity types.Opportunity
request(t, "GET", url+"/opportunities/ocds-1", &opportunity)
if !opportunity.Marks.BidSubmitted || opportunity.Marks.Interested {
t.Errorf("stored marks: %+v", opportunity.Marks)
}
}
// Won and lost exclude each other; unknown marks and opportunities are 404.
func TestChangeMarkRefused(t *testing.T) {
url := opportunitiesServer(t, 1)
marks := url + "/opportunities/ocds-1/marks/"
request(t, "PUT", marks+"won", nil)
status := request(t, "PUT", marks+"lost", nil)
if status != http.StatusConflict {
t.Errorf("lost while won: status %d; want 409", status)
}
status = request(t, "PUT", marks+"shiny", nil)
if status != 404 {
t.Errorf("unknown mark: status %d; want 404", status)
}
status = request(t, "PUT", url+"/opportunities/nope/marks/won", nil)
if status != 404 {
t.Errorf("unknown opportunity: status %d; want 404", status)
}
// Clearing won makes lost allowed.
request(t, "DELETE", marks+"won", nil)
status = request(t, "PUT", marks+"lost", nil)
if status != 200 {
t.Errorf("lost after clearing won: status %d; want 200", status)
}
}
// Concurrent changes to different marks of one opportunity all stick.
func TestChangeMarkConcurrent(t *testing.T) {
url := opportunitiesServer(t, 1)
names := []string{"hidden", "skipped", "interested", "bid_submitted", "won"}
var wg sync.WaitGroup
for _, name := range names {
wg.Add(1)
go func() {
defer wg.Done()
request(t, "PUT", url+"/opportunities/ocds-1/marks/"+name, nil)
}()
}
wg.Wait()
var opportunity types.Opportunity
request(t, "GET", url+"/opportunities/ocds-1", &opportunity)
m := opportunity.Marks
if !m.Hidden || !m.Skipped || !m.Interested || !m.BidSubmitted || !m.Won {
t.Errorf("marks after concurrent PUTs: %+v; want all five set", m)
}
}
// The marks are OpportunityMarks' bool fields, by JSON name, and setting one
// by name sets only that field.
func TestFindMarks(t *testing.T) {
want := "hidden,skipped,interested,bid_submitted,won,lost"
if got := strings.Join(markNames, ","); got != want {
t.Fatalf("markNames = %s; want %s", got, want)
}
for _, name := range markNames {
var marks types.OpportunityMarks
if !setMark(&marks, name, true) {
t.Fatalf("setMark(%q) = false", name)
}
encoded, err := json.Marshal(marks)
if err != nil {
t.Fatal(err)
}
var fields map[string]any
json.Unmarshal(encoded, &fields)
for field, value := range fields {
if set := value == true; set != (field == name) {
t.Errorf("setting %s: %s = %v", name, field, value)
}
}
}
var marks types.OpportunityMarks
if setMark(&marks, "uuid", true) || setMark(&marks, "shiny", true) {
t.Error("setMark accepted a name that isn't a mark")
}
}
// A change to a mark is published with all the marks; a change that changes
// nothing, or is refused, isn't.
func TestChangeMarkPublishes(t *testing.T) {
var bus events.Bus
var mu sync.Mutex
var published []types.OpportunityMarks
bus.Subscribe(func(event events.Event) {
if event.Type != events.OpportunityMarksUpdated {
t.Errorf("event type %q", event.Type)
}
mu.Lock()
defer mu.Unlock()
published = append(published, event.Payload.(types.OpportunityMarks))
})
url := opportunitiesServer(t, 1, WithEvents(&bus))
marks := url + "/opportunities/ocds-1/marks/"
request(t, "PUT", marks+"interested", nil) // published
request(t, "PUT", marks+"interested", nil) // already set: not published
request(t, "DELETE", marks+"skipped", nil) // not set: not published
request(t, "PUT", marks+"shiny", nil) // no such mark: refused
request(t, "PUT", marks+"won", nil) // published
request(t, "PUT", marks+"lost", nil) // won and lost: refused
request(t, "DELETE", marks+"interested", nil) // published
mu.Lock()
defer mu.Unlock()
want := []types.OpportunityMarks{
{
UUID: "ocds-1",
Interested: true,
},
{
UUID: "ocds-1",
Interested: true,
Won: true,
},
{
UUID: "ocds-1",
Won: true,
},
}
if len(published) != len(want) {
t.Fatalf("published %+v; want %+v", published, want)
}
for i := range want {
if published[i] != want[i] {
t.Errorf("event %d: %+v; want %+v", i, published[i], want[i])
}
}
}