// Test union sets of SeriesIDs.
func Test_SeriesIDs_Union(t *testing.T) {
// Test all branches of if-else, exit loop because of 'j < len(r)', and append remainder from left.
ids1 := tsdb.SeriesIDs{1, 2, 3, 7}
ids2 := tsdb.SeriesIDs{1, 3, 4, 5, 6}
exp := tsdb.SeriesIDs{1, 2, 3, 4, 5, 6, 7}
got := ids1.Union(ids2)
if !exp.Equals(got) {
t.Fatalf("exp=%v, got=%v", exp, got)
}
// Test exit because of 'i < len(l)' and append remainder from right.
ids1 = tsdb.SeriesIDs{1}
ids2 = tsdb.SeriesIDs{1, 2}
exp = tsdb.SeriesIDs{1, 2}
got = ids1.Union(ids2)
if !exp.Equals(got) {
t.Fatalf("exp=%v, got=%v", exp, got)
}
}
