package link

import (
	"testing"
	"time"
)

// An ask a machine holds but does not start gets no heartbeat, and the bus hands it to another machine after the ack
// wait, so two machines run one check (issue 1649).

// A fetch's server-side pull request ends clearly before the fetch does, so the server's answer and any message it could still
// deliver come inside the fetch and never into a buffer nobody reads while the machine builds.
func TestAFetchsPullRequestEndsClearlyBeforeTheFetchDoes(t *testing.T) {
	for name, wait := range map[string]time.Duration{"a check queue": checkTakeWait, "the idle wait": takeIdleWait} {
		if margin := wait - fetchExpiryOf(wait); margin < minFetchMargin {
			t.Errorf("%s: the pull request ends %v before a fetch of %v does; want at least %v", name, margin, wait, minFetchMargin)
		}
	}
}

func TestAnAskAnotherBuilderIsRunningIsADuplicateAndYoursIsNot(t *testing.T) {
	r := aPullCheck("build-1", 423, "head-4771ee53aa", "trunk-0123456789", false)
	run := CheckRunning{Head: r.Ref, Trunk: "trunk-0123456789", Builder: "shanks", Build: "build-1", Started: time.Now().Add(-time.Minute), Seen: time.Now().Add(-4 * time.Second)}
	dead := run
	dead.Seen = time.Now().Add(-60 * time.Second)
	for name, c := range map[string]struct {
		running CheckRunning
		found   bool
		me      string
		dup     bool
	}{
		"another builder runs this very ask":                {run, true, "ace", true},
		"its builder stopped renewing the key a minute ago": {dead, true, "ace", false},
		"this builder runs it itself":                       {run, true, "shanks", false},
		"nobody runs it":                                    {CheckRunning{}, false, "ace", false},
		"another ask of the same head":                      {CheckRunning{Head: r.Ref, Trunk: "trunk-0123456789", Builder: "shanks", Build: "build-0"}, true, "ace", false},
		"the same ask at another head":                      {CheckRunning{Head: "head-other-0000", Trunk: "trunk-0123456789", Builder: "shanks", Build: "build-1"}, true, "ace", false},
	} {
		if got := duplicateOf(c.running, c.found, r, c.me) != ""; got != c.dup {
			t.Errorf("%s: duplicate = %v; want %v", name, got, c.dup)
		}
	}
}