asciiart_test.gno

  1package asciiart
  2
  3import (
  4	"strings"
  5	"testing"
  6
  7	"gno.land/p/moul/kit/store/v0"
  8	"gno.land/p/nt/testutils/v0"
  9)
 10
 11func resetState() {
 12	gallery = store.Named("piece")
 13}
 14
 15func TestRenderDiamond(t *testing.T) {
 16	got := RenderDiamond(3)
 17	want := "  *\n ***\n*****\n ***\n  *"
 18	if got != want {
 19		t.Fatalf("RenderDiamond(3) =\n%s\nwant\n%s", got, want)
 20	}
 21}
 22
 23func TestRenderPyramid(t *testing.T) {
 24	got := RenderPyramid(3)
 25	want := "  *\n ***\n*****"
 26	if got != want {
 27		t.Fatalf("RenderPyramid(3) =\n%s\nwant\n%s", got, want)
 28	}
 29}
 30
 31func TestRenderSierpinski(t *testing.T) {
 32	got := RenderSierpinski(4)
 33	want := "####\n# # \n##  \n#   "
 34	if got != want {
 35		t.Fatalf("RenderSierpinski(4) =\n%s\nwant\n%s", got, want)
 36	}
 37}
 38
 39func TestRenderSierpinskiRejectsNonPowerOfTwo(t *testing.T) {
 40	defer func() {
 41		if r := recover(); r == nil {
 42			t.Fatal("expected panic for a non-power-of-two size")
 43		}
 44	}()
 45	RenderSierpinski(5)
 46}
 47
 48func TestRenderChecker(t *testing.T) {
 49	got := RenderChecker(3)
 50	want := "#.#\n.#.\n#.#"
 51	if got != want {
 52		t.Fatalf("RenderChecker(3) =\n%s\nwant\n%s", got, want)
 53	}
 54}
 55
 56func TestRenderPatternUnknown(t *testing.T) {
 57	defer func() {
 58		if r := recover(); r == nil {
 59			t.Fatal("expected panic for an unknown pattern")
 60		}
 61	}()
 62	renderPattern("spiral", 3)
 63}
 64
 65// v1 asserted that its own padID() padded to width 6. That is the narrowest
 66// ceiling in this repo: padID(10^6) is 7 characters and sorts before
 67// padID(10^6-1), so from the millionth piece on the gallery would have
 68// rendered out of order. The store key is 8 bytes for every id.
 69func TestPadID(t *testing.T) {
 70	if a, b := store.ID(2).Key(), store.ID(10).Key(); !(a < b) {
 71		t.Error("id 2 should sort before id 10")
 72	}
 73	if a, b := store.ID(999999).Key(), store.ID(1000000).Key(); !(a < b) {
 74		t.Error("ordering should survive one past v1's width-6 ceiling")
 75	}
 76}
 77
 78// Crossing: Generate mutates realm state, so the test needs `cur realm`.
 79func TestGenerateAddsToGallery(cur realm, t *testing.T) {
 80	resetState()
 81	alice := testutils.TestAddress("alice")
 82	testing.SetRealm(testing.NewUserRealm(alice))
 83
 84	art := Generate(cross(cur), "checker", 3)
 85	if art != RenderChecker(3) {
 86		t.Fatal("Generate should return the rendered art")
 87	}
 88	if gallery.LastID() != 1 {
 89		t.Fatalf("LastID = %s, want 1", gallery.LastID())
 90	}
 91
 92	// The store's Get returns (value, ok), so a stored nil is distinguishable
 93	// from an absent id, which avl/v0's single-value Get cannot express.
 94	v, ok := gallery.Get(1)
 95	if !ok {
 96		t.Fatal("expected piece #1 to exist in the gallery")
 97	}
 98	p := v.(*piece)
 99	if p.Pattern != "checker" || p.Size != 3 || p.Author != alice {
100		t.Fatalf("unexpected piece: %+v", p)
101	}
102}
103
104func TestGenerateRejectsOutOfRangeSize(cur realm, t *testing.T) {
105	resetState()
106	alice := testutils.TestAddress("alice")
107	testing.SetRealm(testing.NewUserRealm(alice))
108
109	rec := revive(func() { Generate(cross(cur), "diamond", 0) })
110	if rec == nil {
111		t.Fatal("expected panic for size < 1")
112	}
113	rec = revive(func() { Generate(cross(cur), "diamond", maxSize+1) })
114	if rec == nil {
115		t.Fatal("expected panic for size > maxSize")
116	}
117}
118
119// Non-crossing: Render is a plain read.
120func TestRenderHomeEmptyGallery(t *testing.T) {
121	resetState()
122	out := Render("")
123	if !strings.Contains(out, "nothing generated yet") {
124		t.Fatal(`Render("") on an empty gallery should say so`)
125	}
126}
127
128func TestRenderPieceNotFound(t *testing.T) {
129	resetState()
130	out := Render("99")
131	if !strings.Contains(out, "No such piece") {
132		t.Fatal(`Render("99") on a missing piece should say so`)
133	}
134}