Unit tests for character stamina functions

data/mods/TEST_DATA/README.md

@@ -0,0 +1,11 @@
+# Test Data pseudo-mod #
+
+This mod is purely for loading data to be used by `tests/cata_test`. It is
+automatically loaded by `tests/test_main.cpp`, so any items, recipes, or other
+content defined in the mod will be available to everything in `tests/`.
+
+The benefit of using this mod for test data is that it allows a clean
+separation of tests from in-game content. Instead of testing with content in
+the main `data/json` directory, functional tests can use `TEST_DATA` content
+to ensure a more stable and controllable set of example data.
+

data/mods/TEST_DATA/metal.json

@@ -0,0 +1,20 @@
+[
+  {
+    "id": "test_platinum_bit",
+    "type": "AMMO",
+    "category": "spare_parts",
+    "name": { "str": "TEST platinum bit" },
+    "description": "A soft shiny metal.  Before the apocalypse this would've been worth a small fortune but now its value is greatly diminished.",
+    "weight": "1 g",
+    "//": "Density 21.45g/cm³ ~ 5.4kg/250ml @ stack 1000 = 5g/unit",
+    "volume": "10ml",
+    "price": 100000,
+    "price_postapoc": 100,
+    "count": 100,
+    "stack_size": 40,
+    "material": [ "platinum" ],
+    "symbol": "/",
+    "color": "light_gray",
+    "ammo_type": "components"
+  }
+]

data/mods/TEST_DATA/modinfo.json

@@ -0,0 +1,12 @@
+[
+  {
+    "type": "MOD_INFO",
+    "ident": "test_data",
+    "name": "TESTING DATA",
+    "description": "Adds mockup items, recipes, and other content for use by automated tests.",
+    "category": "content",
+    "//": "Not really obsolete! Marked as such to prevent it from showing in the main list",
+    "obsolete": true,
+    "dependencies": [ "dda" ]
+  }
+]

src/character.cpp

@@ -6659,7 +6659,7 @@ float Character::stamina_move_cost_modifier() const
     // Both walk and run speed drop to half their maximums as stamina approaches 0.
     // Convert stamina to a float first to allow for decimal place carrying
     float stamina_modifier = ( static_cast<float>( get_stamina() ) / get_stamina_max() + 1 ) / 2;
-    if( move_mode == CMM_RUN && get_stamina() > 0 ) {
+    if( move_mode == CMM_RUN && get_stamina() >= 0 ) {
         // Rationale: Average running speed is 2x walking speed. (NOT sprinting)
         stamina_modifier *= 2.0;
     }