package logstorage

import (
	"testing"
)

func TestPipeFieldsUpdateNeededFields(t *testing.T) {
	f := func(s, neededFields, unneededFields, neededFieldsExpected, unneededFieldsExpected string) {
		t.Helper()
		expectPipeNeededFields(t, s, neededFields, unneededFields, neededFieldsExpected, unneededFieldsExpected)
	}

	// all the needed fields
	f("fields s1, s2", "*", "", "s1,s2", "")
	f("fields *", "*", "", "*", "")

	// all the needed fields, unneeded fields do not intersect with src
	f("fields s1, s2", "*", "f1,f2", "s1,s2", "")
	f("fields *", "*", "f1,f2", "*", "f1,f2")

	// all the needed fields, unneeded fields intersect with src
	f("fields s1, s2", "*", "s1,f1,f2", "s2", "")
	f("fields *", "*", "s1,f1,f2", "*", "s1,f1,f2")

	// needed fields do not intersect with src
	f("fields s1, s2", "f1,f2", "", "", "")

	// needed fields intersect with src
	f("fields s1, s2", "s1,f1,f2", "", "s1", "")
	f("fields *", "s1,f1,f2", "", "s1,f1,f2", "")
}