state-of-tic-tac-toe: add generator template; sync tests

exercises/practice/state-of-tic-tac-toe/.meta/example.tcl

@@ -28,20 +28,20 @@ namespace eval StateOfTicTacToe {
     proc gamestate {board} {
         lassign [parse $board] X O
 
-        switch [list [won $X] [won $O]] {
-            {true true} {error "Impossible board: game should have ended after the game was won"}
+        set xBits [bitCount $X]
+        set oBits [bitCount $O]
+        set xWon [won $X]
+        set oWon [won $O]
 
-            {true false} -
-            {false true} {return "win"}
+        if {($xWon && $oBits >= $xBits) || ($oWon && $xBits >= $oBits + 1)} {
+            error "Impossible board: game should have ended after the game was won"
+        } 
+        if {$xWon || $oWon} then {return "win"}
 
-            default {
-                set xBits [bitCount $X]
-                set oBits [bitCount $O]
-                if {$xBits - $oBits > 1} then {error "Wrong turn order: X went twice"}
-                if {$xBits - $oBits < 0} then {error "Wrong turn order: O started"}
-                return [expr {$xBits + $oBits == 9 ? "draw" : "ongoing"}]
-            }
-        }
+        if {$xBits - $oBits > 1} then {error "Wrong turn order: X went twice"}
+        if {$xBits - $oBits < 0} then {error "Wrong turn order: O started"}
+
+        return [expr {$xBits + $oBits == 9 ? "draw" : "ongoing"}]
     }
 
     proc parse {board} {

exercises/practice/state-of-tic-tac-toe/.meta/template.j2

@@ -0,0 +1,20 @@
+{{header}}
+
+{% for idx, case in cases -%}
+{%   if idx > 0 -%}
+skip {{slug}}-{{idx + 1}}
+{%   endif -%}
+test {{slug}}-{{idx + 1}} {{ case["description"]|tclstring }} -body {
+    gamestate { {% for row in case["input"]["board"] %}
+        {{ row|tclstring }}{% endfor %}
+    }
+{%   if case["expect_error"] -%}
+} -returnCodes error -result "{{ case["expect_error_msg"] }}"
+
+{%   else -%}
+} -returnCodes ok -result "{{ case["expected"] }}"
+
+{%   endif -%}
+{% endfor -%}
+
+{{footer}}

exercises/practice/state-of-tic-tac-toe/.meta/tests.toml

@@ -99,3 +99,9 @@ reimplements = "b1dc8b13-46c4-47db-a96d-aa90eedc4e8d"
 
 [4801cda2-f5b7-4c36-8317-3cdd167ac22c]
 description = "Invalid boards -> Invalid board: players kept playing after a win"
+
+[5a84757a-fc86-4328-aec9-a5759e6ed35d]
+description = "Invalid boards -> Invalid board: O kept playing after X wins"
+
+[cf25543d-583a-4656-b9ab-f82dc00a4a02]
+description = "Invalid boards -> Invalid board: X kept playing after O wins"