42 lines
2.1 KiB
Go
42 lines
2.1 KiB
Go
package fejkdata
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import "testing"
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// TestSeededOutputIsStable pins the exact bytes a seeded generator emits for each
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// piece of the token grammar, so a change to how a format is scanned or rendered
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// cannot quietly shift the rng stream that reproducibility depends on.
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func TestSeededOutputIsStable(t *testing.T) {
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dir := writeData(t, map[string]string{
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"alt": `{"format":"{a|b}","a":["A"],"b":["B"]}`,
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"calc": `{"format":"{net} x {qty} = {calc(net * qty, 2)}","net":["19.99","5.00","100.00"],"qty":["2","3","7"]}`,
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"classes": `{"format":"00-11-AA-aa"}`,
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"escapes": `{"format":"#0#1#A#a##{x}","x":["!"]}`,
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"funcs": `{"format":"{hex(6)} {int(10,99)} {float(0,1,3)} {nanoid(5)} {seq()}"}`,
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"nested": `{"format":"{outer}","outer":[{"format":"{inner}-00","inner":["i"]}]}`,
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"ref": `{"format":"see {..alt}"}`,
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"repeat": `{"format":"{w}","repeat":4,"separator":",","w":["x","y","z"]}`,
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"sums": `{"format":"9{d}{luhn()} {e}{ean()} {m}{mod11()}","d":["012345678901234"],"e":["123456789012"],"m":["12345678"]}`,
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"weights": `[{"format":"big","weight":9},{"format":"tiny","weight":1}]`,
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})
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want := map[string][]string{
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"alt": {"A", "B", "A", "A"},
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"calc": {"100.00 x 3 = 300.00", "100.00 x 3 = 300.00", "100.00 x 7 = 700.00", "5.00 x 3 = 15.00"},
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"classes": {"49-74-VY-gj", "38-68-RP-xo", "47-68-IB-hs", "91-89-LP-gk"},
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"escapes": {"01Aa#!", "01Aa#!", "01Aa#!", "01Aa#!"},
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"funcs": {"0016a2 33 0.649 k4Kwj 1", "a00c07 84 0.175 6UjGv 2", "f70eb8 12 0.390 p5p6g 3", "9048a3 90 0.531 I3Aqv 4"},
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"nested": {"i-89", "i-67", "i-47", "i-27"},
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"ref": {"see A", "see A", "see B", "see A"},
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"repeat": {"z,y,z,y", "z,z,y,y", "z,z,x,z", "x,z,y,y"},
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"sums": {"90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780"},
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"weights": {"big", "big", "big", "big"},
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}
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for path := range want {
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f := newGenerator(t, dir, WithSeed(42))
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for i, expect := range want[path] {
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if got := fake(t, f, path); got != expect {
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t.Errorf("%s draw %d = %q, want %q", path, i, got, expect)
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}
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}
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}
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}
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