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Pin the seeded bytes of paths through a choice, a selector and a drawn row

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This commit is contained in:
Lilleman auf Larv
2026-09-30 20:13:08 +02:00
committed by Lillem4n
parent 1397d1438a
commit d1722a8706
1 changed files with 42 additions and 21 deletions
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format_stability_test.go
+42 -21
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@@ -1,34 +1,55 @@
package fejkdata package fejkdata
import "testing" import (
"os"
"path/filepath"
"testing"
)
// TestSeededOutputIsStable pins the exact bytes a seeded generator emits for each // TestSeededOutputIsStable pins the exact bytes a seeded generator emits for each
// piece of the token grammar, so a change to how a format is scanned or rendered // piece of the token grammar, so a change to how a format is scanned or rendered
// cannot quietly shift the rng stream that reproducibility depends on. // cannot quietly shift the rng stream that reproducibility depends on.
func TestSeededOutputIsStable(t *testing.T) { func TestSeededOutputIsStable(t *testing.T) {
dir := writeData(t, map[string]string{ dir := writeData(t, map[string]string{
"alt": `{"format":"{a|b}","a":"A","b":"B"}`, "alt": `{"format":"{a|b}","a":"A","b":"B"}`,
"calc": `{"format":"{net} x {qty} = {calc(net * qty, 2)}","net":["19.99","5.00","100.00"],"qty":["2","3","7"]}`, "calc": `{"format":"{net} x {qty} = {calc(net * qty, 2)}","net":["19.99","5.00","100.00"],"qty":["2","3","7"]}`,
"classes": `"{digits(2)}-{int(1,9)}{int(1,9)}-{upper(2)}-{lower(2)}"`, "classes": `"{digits(2)}-{int(1,9)}{int(1,9)}-{upper(2)}-{lower(2)}"`,
"escapes": `{"format":"01Aa#{x}","x":"!"}`, "escapes": `{"format":"01Aa#{x}","x":"!"}`,
"funcs": `"{hex(6)} {int(10,99)} {float(0,1,3)} {nanoid(5)} {seq()}"`, "funcs": `"{hex(6)} {int(10,99)} {float(0,1,3)} {nanoid(5)} {seq()}"`,
"nested": `{"format":"{outer}","outer":{"format":"{inner}-{digits(2)}","inner":"i"}}`, "municipality": `{"format":"{name}","rows":"municipality.tsv","key":"code","name":"name","parent":"region"}`,
"ref": `"see {/alt}"`, "nested": `{"format":"{outer}","outer":{"format":"{inner}-{digits(2)}","inner":"i"}}`,
"repeat": `{"format":"{w}","repeat":4,"separator":",","w":["x","y","z"]}`, "paths": `{"format":"{p.a}{p.b}","p":[{"format":"x","a":"1","b":"2"},{"format":"y","a":"A","b":"B"},{"format":"z","a":"a","b":"b"}]}`,
"sums": `{"format":"9{d}{luhn()} {e}{ean()} {m}{mod11()}","d":"012345678901234","e":"123456789012","m":"12345678"}`, "ref": `"see {/alt}"`,
"weights": `[{"format":"big","weight":9},"tiny"]`, "refpath": `"{/region.municipality.name} in {/region.name}"`,
"region": `{"format":"{name}","rows":"region.tsv","key":"code","name":"name","weight":"people"}`,
"repeat": `{"format":"{w}","repeat":4,"separator":",","w":["x","y","z"]}`,
"sums": `{"format":"9{d}{luhn()} {e}{ean()} {m}{mod11()}","d":"012345678901234","e":"123456789012","m":"12345678"}`,
"weights": `[{"format":"big","weight":9},"tiny"]`,
}) })
for name, rows := range map[string]string{
"municipality": "code\tname\tregion\n0180\tStockholm\t01\n0184\tSolna\t01\n1280\tMalmö\t12\n1281\tLund\t12\n",
"region": "code\tname\tpeople\n01\tStockholms län\t3\n12\tSkåne län\t1\n",
} {
if err := os.WriteFile(filepath.Join(dir, name+".tsv"), []byte(rows), 0o644); err != nil {
t.Fatal(err)
}
}
want := map[string][]string{ want := map[string][]string{
"alt": {"A", "A", "B", "A"}, "alt": {"A", "A", "B", "A"},
"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"}, "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"},
"classes": {"49-74-VY-gj", "38-68-RP-xo", "47-68-IB-hs", "91-89-LP-gk"}, "classes": {"49-74-VY-gj", "38-68-RP-xo", "47-68-IB-hs", "91-89-LP-gk"},
"escapes": {"01Aa#!", "01Aa#!", "01Aa#!", "01Aa#!"}, "escapes": {"01Aa#!", "01Aa#!", "01Aa#!", "01Aa#!"},
"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"}, "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"},
"nested": {"i-73", "i-23", "i-67", "i-85"}, "nested": {"i-73", "i-23", "i-67", "i-85"},
"ref": {"see A", "see A", "see A", "see B"}, "paths": {"ab", "ab", "AB", "AB"},
"repeat": {"z,y,z,y", "z,z,y,y", "z,z,x,z", "x,z,y,y"}, "paths.p.a": {"A", "a", "a", "A"},
"sums": {"90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780"}, "ref": {"see A", "see A", "see A", "see B"},
"weights": {"big", "big", "big", "big"}, "refpath": {"Solna in Stockholms län", "Malmö in Skåne län", "Stockholm in Stockholms län", "Malmö in Skåne län"},
"region.municipality[0184].name": {"Solna", "Solna", "Solna", "Solna"},
"region[12].municipality.name": {"Malmö", "Malmö", "Lund", "Malmö"},
"repeat": {"z,y,z,y", "z,z,y,y", "z,z,x,z", "x,z,y,y"},
"sums": {"90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780", "90123456789012348 1234567890124 123456780"},
"weights": {"big", "big", "big", "big"},
} }
for path := range want { for path := range want {
f := newGenerator(t, dir, WithSeed(42)) f := newGenerator(t, dir, WithSeed(42))