Polish table and clarify showdown results

app/src/test/java/com/jsjdesigns/poker/ActionButtonsTest.kt

@@ -78,6 +78,47 @@ class ActionButtonsTest {
         assertFalse(buttonsFor(offer(canRaise = false)).showRaise)
     }
 
+    @Test
+    fun `raise presets use the pot after calling and legal raise-to amounts`() {
+        val decision = offer(
+            toCall = 10,
+            minRaiseTo = 20,
+            maxRaiseTo = 500,
+        )
+
+        assertEquals(
+            listOf(
+                RaisePreset("Min", 20),
+                RaisePreset("½ pot", 35),
+                RaisePreset("Pot", 60),
+                RaisePreset("All in", 500),
+            ),
+            raisePresets(decision),
+        )
+    }
+
+    @Test
+    fun `raise presets drop clamped duplicates instead of mislabelling them`() {
+        val decision = offer(
+            toCall = 10,
+            minRaiseTo = 45,
+            maxRaiseTo = 50,
+            stack = 50,
+        )
+
+        assertEquals(
+            listOf(RaisePreset("Min", 45), RaisePreset("All in", 50)),
+            raisePresets(decision),
+        )
+    }
+
+    @Test
+    fun `a single legal shove has one all-in preset`() {
+        val decision = offer(minRaiseTo = 200, maxRaiseTo = 120, stack = 120)
+
+        assertEquals(listOf(RaisePreset("All in", 120)), raisePresets(decision))
+    }
+
     // ---------- fold and call ----------
 
     @Test