123 lines
2.3 KiB
Go
123 lines
2.3 KiB
Go
package internal
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import (
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"testing"
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)
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func TestRecordQueue(t *testing.T) {
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var recCount int
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newRecord := func() Record {
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recCount++
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return testRecord{
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id: recCount,
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}
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}
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var rq RecordQueue
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if rq.Len() != 0 {
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t.Fatalf("zero value should have zero lenght")
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}
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_, ok := rq.Pop()
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if ok {
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t.Fatalf("Pop() should return (_,false) on a zero value")
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}
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_, ok = rq.Peek()
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if ok {
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t.Fatalf("Peek() should return (_,false) on a zero value")
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}
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rq.Push(nil)
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if rq.Len() != 0 {
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t.Fatalf("pushing nil should be a no-op")
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}
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rq.Push(newRecord())
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if rq.Len() != 1 {
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t.Fatalf("pushing 1st record should result in lenght of 1")
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}
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rq.Push(newRecord())
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if rq.Len() != 2 {
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t.Fatalf("pushing 2nd record should result in lenght of 2")
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}
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peekRec, ok := rq.Peek()
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if !ok {
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t.Fatalf("Peek() should return (_,true) when the list is not empty")
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}
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if peekRec, ok := peekRec.(testRecord); ok {
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if peekRec.id != 1 {
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t.Fatalf("Peek() should return the 1st record pushed but returned %d", peekRec.id)
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}
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} else {
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t.Fatalf("Peek() should return the original record type")
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}
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if rq.Len() != 2 {
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t.Fatalf("Peek() should not affect the list length")
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}
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popRec, ok := rq.Pop()
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if !ok {
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t.Fatalf("Pop() should return (_,true) when the list is not empty")
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}
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if rec, ok := popRec.(testRecord); ok {
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if rec.id != 1 {
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t.Fatalf("Pop() should return the first record pushed but returned %d", rec.id)
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}
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} else {
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t.Fatalf("Pop() should return the original record")
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}
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if rq.Len() != 1 {
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t.Fatalf("Pop() should remove an element from the list")
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}
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}
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func TestRecordQueueNilReceiver(t *testing.T) {
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var rq *RecordQueue
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if rq.Len() > 0 {
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t.Fatalf("nil receiver should have zero lenght")
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}
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_, ok := rq.Peek()
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if ok {
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t.Fatalf("Peek() on a nil receiver should return (_,false)")
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}
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_, ok = rq.Pop()
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if ok {
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t.Fatalf("Pop() on a nil receiver should return (_,false)")
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}
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rq.Push(nil)
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if rq.Len() != 0 {
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t.Fatalf("Push(nil) on a nil receiver should be a no-op")
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}
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defer func() {
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r := recover()
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if r == nil {
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t.Fatalf("expected a panic but got nothing")
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}
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expMsg := "Push to nil RecordQueue"
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if msg, ok := r.(string); !ok || msg != expMsg {
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t.Fatalf(`want panic message %q but got "%v"`, expMsg, r)
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}
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}()
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rq.Push(testRecord{})
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}
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type testRecord struct {
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Record
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id int
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}
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