Initial project import

tools/v/vlib/rand/cuid2/cuid2_test.v

@@ -0,0 +1,64 @@
+module cuid2
+
+import rand.musl
+import rand.mt19937
+
+fn test_cuid2() {
+	// default prng(wyrand), default id length = 24
+	mut g24 := new()
+	uuid24 := g24.generate()
+	assert uuid24.len == 24
+	assert is_cuid(uuid24)
+
+	// default prng(wyrand), id length = 2
+	mut g2 := new(length: 2)
+	uuid2 := g2.generate()
+	assert uuid2.len == 2
+	assert is_cuid(uuid2)
+
+	// default prng(wyrand), id length = 32
+	mut g32 := new(length: 32)
+	uuid32 := g32.generate()
+	assert uuid32.len == 32
+	assert is_cuid(uuid32)
+
+	// musl prng, id length = 28
+	mut g_musl := new(prng: &musl.MuslRNG{}, length: 28)
+	uuid_musl := g_musl.generate()
+	assert uuid_musl.len == 28
+	assert is_cuid(uuid_musl)
+
+	// mt19937 prng, default id length = 24
+	mut g_mt19937 := new(prng: &mt19937.MT19937RNG{})
+	uuid_mt19937 := g_mt19937.generate()
+	assert uuid_mt19937.len == 24
+	assert is_cuid(uuid_mt19937)
+
+	// successive calls
+	// default prng(wyrand), default id length = 24
+	mut g := new()
+	mut ids := []string{}
+	for id in g {
+		eprintln(id)
+		// id length should be default length(24)
+		assert id.len == 24
+		assert is_cuid(id)
+
+		ids << id
+		if ids.len == 5 {
+			break
+		}
+	}
+
+	// successive calls to g.next() in a row should be unique
+	assert ids[0] != ids[1]
+	assert ids[0] != ids[2]
+	assert ids[0] != ids[3]
+	assert ids[0] != ids[4]
+	assert ids[1] != ids[2]
+	assert ids[1] != ids[3]
+	assert ids[1] != ids[4]
+	assert ids[2] != ids[3]
+	assert ids[2] != ids[4]
+	assert ids[3] != ids[4]
+}