rand: check the separators for the generated UUIDs in random_identifiers_test.v

vlib/rand/random_identifiers_test.v

@@ -1,23 +1,32 @@
 import time
 import rand
 
+fn validate_separators(uuid string) {
+	assert uuid[8] == `-`
+	assert uuid[13] == `-`
+	assert uuid[18] == `-`
+	assert uuid[23] == `-`
+	assert uuid.len == 36
+}
+
 // uuid_v4:
 fn test_rand_uuid_v4() {
 	uuid1 := rand.uuid_v4()
 	uuid2 := rand.uuid_v4()
 	uuid3 := rand.uuid_v4()
+	validate_separators(uuid1)
+	validate_separators(uuid2)
+	validate_separators(uuid3)
 	assert uuid1 != uuid2
 	assert uuid1 != uuid3
 	assert uuid2 != uuid3
-	assert uuid1.len == 36
-	assert uuid2.len == 36
-	assert uuid3.len == 36
 	for i in 0 .. 1000 {
 		x := rand.uuid_v4()
 		// check the version field is always 4:
 		assert x[14] == `4`
 		// and the clock_seq_hi_and_reserved field is valid too:
 		assert x[19] in [`8`, `9`, `a`, `b`]
+		validate_separators(x)
 	}
 }
 
@@ -26,18 +35,19 @@ fn test_rand_uuid_v7() {
 	uuid1 := rand.uuid_v7()
 	uuid2 := rand.uuid_v7()
 	uuid3 := rand.uuid_v7()
+	validate_separators(uuid1)
+	validate_separators(uuid2)
+	validate_separators(uuid3)
 	assert uuid1 != uuid2
 	assert uuid1 != uuid3
 	assert uuid2 != uuid3
-	assert uuid1.len == 36
-	assert uuid2.len == 36
-	assert uuid3.len == 36
 	for i in 0 .. 1000 {
 		x := rand.uuid_v7()
 		// check the version field is always 7:
 		assert x[14] == `7`
 		// and variant field is always 0b10:
 		assert x[19] in [`8`, `9`, `a`, `b`]
+		validate_separators(x)
 	}
 }