253 lines
7.2 KiB
Go
253 lines
7.2 KiB
Go
package fejkdata
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import (
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"encoding/csv"
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"encoding/json"
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"strings"
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"testing"
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)
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func recordCat(t *testing.T) *Generator {
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t.Helper()
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dir := writeData(t, map[string]string{
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"users": `{
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"format": "{first} {last}",
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"first": ["Ada", "Bo"],
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"last": ["Lovelace", "Ek"]
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}`,
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})
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return newGenerator(t, dir, WithSeed(1))
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}
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func TestRecordProjectsFieldsAsColumns(t *testing.T) {
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f := recordCat(t)
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r, err := f.Record("users")
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if err != nil {
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t.Fatal(err)
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}
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got := r.Fields()
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if len(got) != 2 || got[0].Name != "first" || got[1].Name != "last" {
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t.Fatalf("Record.Fields() = %v, want columns first, last in name order", got)
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}
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if (got[0].Value != "Ada" && got[0].Value != "Bo") || (got[1].Value != "Lovelace" && got[1].Value != "Ek") {
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t.Fatalf("columns = %v, want the field values", got)
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}
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}
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func TestRecordIsDeterministic(t *testing.T) {
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a, b := recordCat(t), recordCat(t)
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for i := 0; i < 20; i++ {
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x, _ := a.Record("users")
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y, _ := b.Record("users")
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if x.JSON() != y.JSON() {
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t.Fatalf("same seed diverged: %s != %s", x.JSON(), y.JSON())
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}
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}
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}
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func TestRecordSkipsReferenceBindings(t *testing.T) {
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dir := writeData(t, map[string]string{
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"name": `{"format": "{first} {last}", "first": "Ada", "last": "Lovelace"}`,
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"user": `{"format": "they are {/name}", "id": "1"}`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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r, err := f.Record("user")
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if err != nil {
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t.Fatal(err)
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}
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got := r.Fields()
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if len(got) != 1 || got[0].Name != "id" {
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t.Fatalf("Record.Fields() = %v, want only the id column (a {/path} is not a column)", got)
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}
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}
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func TestRecordErrors(t *testing.T) {
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dir := writeData(t, map[string]string{
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"bare": `"hello"`,
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"pick": `["a", "b"]`,
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"group/cat": `"x"`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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for _, c := range []struct {
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path string
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want string
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}{
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{"bare", "has no fields, so no columns"},
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{"pick", "names a choice"},
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{"group", "names a folder"},
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{"nope", "no entry"},
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} {
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if _, err := f.Record(c.path); err == nil || !strings.Contains(err.Error(), c.want) {
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t.Errorf("Record(%q) = %v, want an error containing %q", c.path, err, c.want)
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}
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}
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}
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func TestRecordJSON(t *testing.T) {
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f := recordCat(t)
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r, err := f.Record("users")
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if err != nil {
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t.Fatal(err)
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}
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var m map[string]string
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if err := json.Unmarshal([]byte(r.JSON()), &m); err != nil {
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t.Fatalf("Record.JSON() is not valid JSON: %v\n%s", err, r.JSON())
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}
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if len(m) != 2 || (m["first"] != "Ada" && m["first"] != "Bo") {
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t.Fatalf("Record.JSON() = %s, want two addressable columns", r.JSON())
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}
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for _, f := range r.Fields() {
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if m[f.Name] != f.Value {
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t.Fatalf("JSON column %q = %q, want %q", f.Name, m[f.Name], f.Value)
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}
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}
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}
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func TestRecordCSV(t *testing.T) {
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dir := writeData(t, map[string]string{
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"note": `{"format": "{word}, {word}", "word": ["a", "b,c", "d\"e", "f\n"]}`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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r, err := f.Record("note")
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if err != nil {
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t.Fatal(err)
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}
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if got := r.CSVHeader(); got != "word" {
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t.Errorf("CSVHeader() = %q, want word", got)
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}
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rec, err := csv.NewReader(strings.NewReader(r.CSVLine() + "\n")).Read()
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if err != nil {
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t.Fatalf("CSVLine() is not valid CSV: %v\n%q", err, r.CSVLine())
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}
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if len(rec) != 1 || rec[0] != r.Fields()[0].Value {
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t.Fatalf("CSVLine() = %v, want the field value round-tripped", rec)
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}
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}
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func TestRecordSQLInsert(t *testing.T) {
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dir := writeData(t, map[string]string{
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"person": `{"format": "{last}", "last": "O'Brien"}`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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r, err := f.Record("person")
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if err != nil {
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t.Fatal(err)
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}
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got := r.SQLInsert("people")
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if got != `INSERT INTO "people" ("last") VALUES ('O''Brien');` {
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t.Fatalf("SQLInsert() = %q, want quoted identifiers and the single quote doubled", got)
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}
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}
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func TestRecordRejectsFieldDescent(t *testing.T) {
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dir := writeData(t, map[string]string{
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"cat": `{"format":"{sub}","sub":{"format":"{x}","x":"1"}}`,
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"row": `[{"format":"{x}","x":"1"},{"format":"{x}","x":"2"}]`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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for _, path := range []string{"cat.sub", "row.x"} {
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if _, err := f.Record(path); err == nil || !strings.Contains(err.Error(), "field") {
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t.Errorf("Record(%q) = %v, want a 'descends into a field' error", path, err)
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}
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}
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}
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func TestRecordSharesAReferenceAcrossColumns(t *testing.T) {
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dir := writeData(t, map[string]string{
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"currency": `[{"format":"{code}","code":"AUD","symbol":"$"},{"format":"{code}","code":"EUR","symbol":"€"}]`,
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"price": `{"format":"","code":"{/currency.code}","symbol":"{/currency.symbol}"}`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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for i := 0; i < 100; i++ {
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r, err := f.Record("price")
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if err != nil {
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t.Fatal(err)
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}
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m := map[string]string{}
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for _, c := range r.Fields() {
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m[c.Name] = c.Value
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}
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switch m["code"] {
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case "AUD":
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if m["symbol"] != "$" {
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t.Fatalf("record %q: code AUD but symbol %q, want one currency draw across columns", r.JSON(), m["symbol"])
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}
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case "EUR":
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if m["symbol"] != "€" {
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t.Fatalf("record %q: code EUR but symbol %q, want one currency draw across columns", r.JSON(), m["symbol"])
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}
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default:
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t.Fatalf("record %q has unexpected code %q", r.JSON(), m["code"])
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}
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}
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}
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func TestRecordSharesAReferenceIntoAColumnRepeat(t *testing.T) {
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dir := writeData(t, map[string]string{
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"currency": `[{"format":"{code}","code":"AUD"},{"format":"{code}","code":"EUR"}]`,
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"order": `{"format":"","codes":{"format":"{/currency.code}","repeat":3,"separator":"-"}}`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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for i := 0; i < 50; i++ {
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r, err := f.Record("order")
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if err != nil {
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t.Fatal(err)
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}
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parts := strings.Split(r.Fields()[0].Value, "-")
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if len(parts) != 3 || parts[0] != parts[1] || parts[1] != parts[2] {
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t.Fatalf("codes column = %q, want one shared draw across its repeat", r.Fields()[0].Value)
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}
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}
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}
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func TestRecordSQLQuotesIdentifiers(t *testing.T) {
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dir := writeData(t, map[string]string{
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"row": `{"format": "", "postal-code": "1", "street-number": "2"}`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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r, err := f.Record("row")
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if err != nil {
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t.Fatal(err)
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}
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got := r.SQLInsert("my-table")
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if got != `INSERT INTO "my-table" ("postal-code", "street-number") VALUES ('1', '2');` {
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t.Fatalf("SQLInsert() = %q, want hyphenated identifiers and table quoted", got)
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}
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}
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func TestFakeRecordAndTemplate(t *testing.T) {
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f := recordCat(t)
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in := `{"format":"{x} {y}","x":["1","2"],"y":["3","4"]}`
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want, err := f.FakeRecord(in)
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if err != nil {
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t.Fatalf("FakeRecord: %v", err)
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}
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if len(want.Fields()) != 2 {
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t.Fatalf("FakeRecord fields = %v, want two columns", want.Fields())
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}
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reusable, err := f.NewRecordTemplate(in)
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if err != nil {
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t.Fatalf("NewRecordTemplate: %v", err)
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}
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for i := 0; i < 20; i++ {
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if got := reusable.Fake(); len(got.Fields()) != 2 {
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t.Fatalf("RecordTemplate.Fake() = %v, want two columns", got.Fields())
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}
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}
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}
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func TestInlineRecordErrors(t *testing.T) {
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f := recordCat(t)
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for _, c := range []struct {
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input string
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want string
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}{
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{`"hello"`, "needs at least one field"},
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{`["a","b"]`, "a choice"},
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} {
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if _, err := f.FakeRecord(c.input); err == nil || !strings.Contains(err.Error(), c.want) {
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t.Errorf("FakeRecord(%q) = %v, want an error naming %q", c.input, err, c.want)
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}
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}
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}
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