Initial project import

tools/v/vlib/math/factorial_test.v

@@ -0,0 +1,22 @@
+module math
+
+fn test_factorial() {
+	assert factorial(12) == 479001600
+	assert factorial(5) == 120
+	assert factorial(0) == 1
+}
+
+fn test_log_factorial() {
+	assert log_factorial(12) == log(479001600)
+	assert log_factorial(5) == log(120)
+	assert log_factorial(0) == log(1)
+}
+
+fn test_factoriali() {
+	assert factoriali(20) == 2432902008176640000
+	assert factoriali(1) == 1
+	assert factoriali(2) == 2
+	assert factoriali(0) == 1
+	assert factoriali(-2) == 1
+	assert factoriali(1000) == -1
+}