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

format_stability_test.go

@@ -1,6 +1,10 @@
 package fejkdata
 
-import "testing"
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
 
 // 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
@@ -12,12 +16,24 @@ func TestSeededOutputIsStable(t *testing.T) {
 		"classes":      `"{digits(2)}-{int(1,9)}{int(1,9)}-{upper(2)}-{lower(2)}"`,
 		"escapes":      `{"format":"01Aa#{x}","x":"!"}`,
 		"funcs":        `"{hex(6)} {int(10,99)} {float(0,1,3)} {nanoid(5)} {seq()}"`,
+		"municipality": `{"format":"{name}","rows":"municipality.tsv","key":"code","name":"name","parent":"region"}`,
 		"nested":       `{"format":"{outer}","outer":{"format":"{inner}-{digits(2)}","inner":"i"}}`,
+		"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"}]}`,
 		"ref":          `"see {/alt}"`,
+		"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{
 		"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"},
@@ -25,7 +41,12 @@ func TestSeededOutputIsStable(t *testing.T) {
 		"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"},
 		"nested":                         {"i-73", "i-23", "i-67", "i-85"},
+		"paths":                          {"ab", "ab", "AB", "AB"},
+		"paths.p.a":                      {"A", "a", "a", "A"},
 		"ref":                            {"see A", "see A", "see A", "see B"},
+		"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"},