Additional tests

COMPAT.md

@@ -226,7 +226,7 @@ Feature support of [sqlite expr syntax](https://www.sqlite.org/lang_expr.html).
 | length(X)                    | Yes     |                                                      |
 | like(X,Y)                    | Yes     |                                                      |
 | like(X,Y,Z)                  | Yes     |                                                      |
-| likelihood(X,Y)              | No      |                                                      |
+| likelihood(X,Y)              | Yes     |                                                      |
 | likely(X)                    | Yes     |                                                      |
 | load_extension(X)            | Yes     | sqlite3 extensions not yet supported                 |
 | load_extension(X,Y)          | No      |                                                      |

testing/scalar-functions.test

@@ -211,6 +211,42 @@ do_execsql_test likely-null {
     select likely(NULL)
 } {}
 
+do_execsql_test likelihood-string {
+  SELECT likelihood('limbo', 0.5);
+} {limbo}
+
+do_execsql_test likelihood-string-high-probability {
+  SELECT likelihood('database', 0.9375);
+} {database}
+
+do_execsql_test likelihood-integer {
+  SELECT likelihood(100, 0.0625);
+} {100}
+
+do_execsql_test likelihood-integer-probability-1 {
+  SELECT likelihood(42, 1);
+} {42}
+
+do_execsql_test likelihood-decimal {
+  SELECT likelihood(12.34, 0.5);
+} {12.34}
+
+do_execsql_test likelihood-null {
+  SELECT likelihood(NULL, 0.5);
+} {}
+
+do_execsql_test likelihood-blob {
+  SELECT hex(likelihood(x'01020304', 0.5));
+} {01020304}
+
+do_execsql_test likelihood-zero-probability {
+  SELECT likelihood(999, 0);
+} {999}
+
+do_execsql_test likelihood-extreme-probability {
+  SELECT likelihood(999, 1);
+} {999}
+
 do_execsql_test unhex-str-ab {
   SELECT unhex('6162');
 } {ab}