game/internal/generator/planet_test.go

@@ -18,14 +18,21 @@ func TestPlanetRandomName(t *testing.T) {
 	for _, pc := range []g.PlanetClass{g.PlanetClassHW, g.PlanetClassDW, g.PlanetClassGiant, g.PlanetClassBig, g.PlanetClassNormal, g.PlanetClassRich, g.PlanetClassAsterioid} {
 		t.Run(string(pc), func(t *testing.T) {
 			name := g.NewPlanet(pc, g.Coordinate{0, 0}, 0, 0).RandomName()
-			g := re.FindStringSubmatch(name)
+			// `RandomName` formats `<class>-<4-digit>-<4-digit>`,
-			assert.NotNilf(t, g, "cannot parse: %q", name)
+			// where each suffix is an independent `rand.Intn(1000)`.
-			if g == nil {
+			// We assert the wire format and the class prefix; an
+			// earlier revision also asserted `g[2] != g[3]`, which
+			// flaked on the legitimate ~0.1% collision (a property
+			// the function does not — and need not — guarantee:
+			// `generate_game.go` already tolerates duplicate names
+			// across planets).
+			groups := re.FindStringSubmatch(name)
+			assert.NotNilf(t, groups, "cannot parse: %q", name)
+			if groups == nil {
 				return
 			}
-			assert.Equalf(t, 4, len(g), "regexp groups")
+			assert.Equalf(t, 4, len(groups), "regexp groups")
-			assert.Equal(t, string(pc), g[1])
+			assert.Equal(t, string(pc), groups[1])
-			assert.NotEqual(t, g[2], g[3])
 		})
 	}
 }