examples: annotate examples

[nit.git] / lib / sha1.nit

diff --git a/lib/sha1.nit b/lib/sha1.nit
index 42a91ed..a80e9f2 100644 (file)
--- a/lib/sha1.nit
+++ b/lib/sha1.nit
@@ -257,4 +257,14 @@ redef class Text
        #
        #     assert "The quick brown fox jumps over the lazy dog".sha1_hexdigest == "2FD4E1C67A2D28FCED849EE1BB76E7391B93EB12"
        fun sha1_hexdigest: String do return sha1.hexdigest
+
+       # Is `self` a SHA-1 hexdigest?
+       #
+       #~~~nit
+       # assert "2FD4E1C67A2D28FCED849EE1BB76E7391B93EB12".is_sha1_digest
+       # assert not "Not a digest".is_sha1_digest
+       # assert not "2FD4E1C67A2D28FCED849EE1B76E7391B93EB12".is_sha1_digest
+       # assert not "2FD4E1C67A2D28FCED849EE1UB76E7391B93EB12".is_sha1_digest
+       #~~~
+       fun is_sha1_digest: Bool do return length == 40 and is_hex
 end