tests/gobang.go: Add tests for Random(), Salt() and Hash()

2 files changed, 44 insertions, 2 deletions

diff --git a/src/gobang.go b/src/gobang.go
index dc0d9bc..ff8f68b 100644
--- a/src/gobang.go
+++ b/src/gobang.go
@@ -57,6 +57,7 @@ type CopyResult struct {
 
 
 const maxInt = int((^uint(0)) >> 1)
+const MinimumPasswordLength = 16
 
 const (
 	scrypt_N = 1 << 15
@@ -410,6 +411,7 @@ func Hash(password []byte, salt []byte) []byte{
 }
 
 // FIXME: finish rewriting
+// FIXME: add tests
 //
 // getV7Time returns the time in milliseconds and nanoseconds / 256.
 // The returned (milli << (12 + seq)) is guaranteed to be greater than
@@ -419,8 +421,8 @@ func getV7Time(nano int64) (int64, int64) {
 	const nanoPerMilli = 1000 * 1000
 
 	milli := nano / nanoPerMilli
-	seq := (nano - (milli * nanoPerMilli)) >> 8
-	now := milli << (12 + seq)
+	seq   := (nano - (milli * nanoPerMilli)) >> 8
+	now   := milli << (12 + seq)
 
 	timeMutex.Lock()
 	defer timeMutex.Unlock()
diff --git a/tests/gobang.go b/tests/gobang.go
index 46cc9c5..324a155 100644
--- a/tests/gobang.go
+++ b/tests/gobang.go
@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"hash"
 	"log/slog"
+	"os"
 	"time"
 )
 
@@ -345,6 +346,42 @@ func test_scrypt() {
 	})
 }
 
+func test_Random() {
+	TestStart("Random()")
+
+	Testing("we get the desired output size", func() {
+		for i := 0; i < 100; i++ {
+			buffer := Random(i)
+			AssertEqual(len(buffer), i)
+		}
+	})
+}
+
+func test_Salt() {
+	TestStart("Salt()")
+
+	Testing("we generate a random salt of a fixed size", func() {
+		salt := Salt()
+		AssertEqual(len(salt), scryptSaltMinLength)
+
+		var buffer [scryptSaltMinLength * 2]byte
+		hex.Encode(buffer[:], salt)
+		fmt.Fprintf(os.Stderr, "%s ", string(buffer[:]))
+	})
+}
+
+func test_Hash() {
+	TestStart("Hash()")
+
+	Testing("same input, same output", func() {
+		password := Random(16)
+		salt := Salt()
+		hash1 := Hash(password, salt)
+		hash2 := Hash(password, salt)
+		AssertEqual(hash1, hash2)
+	})
+}
+
 func test_newUUIDFrom() {
 	TestStart("newUUIDFrom()")
 
@@ -480,6 +517,9 @@ func TestSetLoggerOutput() {
 func MainTest() {
 	test__PBKDF()
 	test_scrypt()
+	test_Hash()
+	test_Random()
+	test_Salt()
 	test_newUUIDFrom()
 	test_NewUUID()
 	test_UUIDString()