60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
package fejkdata
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import (
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"strings"
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"testing"
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)
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// newGenerator creates a generator over a single data directory, failing on
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// error. Most tests load one dir; newGeneratorN loads several (last-loaded wins
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// on conflicts).
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func newGenerator(t *testing.T, dir string, opts ...Option) *Generator {
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t.Helper()
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return newGeneratorN(t, []string{dir}, opts...)
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}
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func newGeneratorN(t *testing.T, dirs []string, opts ...Option) *Generator {
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t.Helper()
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f, err := New(dirs, opts...)
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if err != nil {
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t.Fatalf("New(%q): %v", dirs, err)
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}
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return f
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}
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// fake generates a value, failing the test on error.
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func fake(t *testing.T, f *Generator, path string) string {
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t.Helper()
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s, err := f.Fake(path)
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if err != nil {
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t.Fatalf("Fake(%q): %v", path, err)
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}
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return s
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}
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func TestNewMissingDirectory(t *testing.T) {
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_, err := New([]string{"data/de_DE"})
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if err == nil || !strings.Contains(err.Error(), "de_DE") {
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t.Fatalf("New(missing) error = %v, want it to name the path", err)
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}
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}
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func TestWithSeedIsDeterministic(t *testing.T) {
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a, b := newGenerator(t, "data/sv_SE", WithSeed(42)), newGenerator(t, "data/sv_SE", WithSeed(42))
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for i := 0; i < 50; i++ {
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if x, y := fake(t, a, "person"), fake(t, b, "person"); x != y {
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t.Fatalf("same seed diverged at %d: %q != %q", i, x, y)
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}
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}
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}
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func TestDifferentSeedsDiffer(t *testing.T) {
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a, b := newGenerator(t, "data/en_US", WithSeed(1)), newGenerator(t, "data/en_US", WithSeed(2))
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for i := 0; i < 50; i++ {
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if fake(t, a, "person") != fake(t, b, "person") {
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return
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}
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}
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t.Fatal("seeds 1 and 2 produced identical sequences")
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}
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