41 lines
965 B
Go
41 lines
965 B
Go
package drawstate
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import "testing"
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func TestOneSeedDrawsOneSequence(t *testing.T) {
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a, b := New(42), New(42)
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for i := 0; i < 50; i++ {
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if x, y := a.Uint64(), b.Uint64(); x != y {
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t.Fatalf("seed 42 diverged at draw %d: %d != %d", i, x, y)
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}
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}
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}
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func TestTwoSeedsDrawTwoSequences(t *testing.T) {
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a, b := New(1), New(2)
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for i := 0; i < 50; i++ {
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if a.Uint64() != b.Uint64() {
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return
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}
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}
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t.Fatal("seeds 1 and 2 drew identical sequences")
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}
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func TestCountersCountFromOneEach(t *testing.T) {
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s := New(1)
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for want := uint64(1); want <= 3; want++ {
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if got := s.Next(""); got != want {
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t.Fatalf("Next(\"\") = %d, want %d", got, want)
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}
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}
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if got := s.Next("orders"); got != 1 {
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t.Fatalf("Next(orders) = %d, want its own count from 1", got)
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}
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if got := s.Next(""); got != 4 {
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t.Fatalf("Next(\"\") after Next(orders) = %d, want 4", got)
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}
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if got := New(1).Next(""); got != 1 {
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t.Fatalf("a new state's Next = %d, want 1", got)
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}
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}
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