Index: binaries/data/mods/public/simulation/components/tests/test_Heal.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/simulation/components/tests/test_Heal.js
@@ -0,0 +1,102 @@
+Engine.LoadHelperScript("ValueModification.js");
+Engine.LoadComponentScript("interfaces/Heal.js");
+Engine.LoadComponentScript("interfaces/Health.js");
+Engine.LoadComponentScript("interfaces/Loot.js");
+Engine.LoadComponentScript("interfaces/Promotion.js");
+Engine.LoadComponentScript("interfaces/UnitAI.js");
+Engine.LoadComponentScript("Heal.js");
+
+const entity= 60;
+
+let template = {
+	"Range": 20,
+	"RangeOverlay" : {
+		"LineTexture": "heal_overlay_range.png",
+		"LineTextureMask": "heal_overlay_range_mask.png",
+		"LineThickness": 0.35
+	},
+	"HP": 5,
+	"Rate": 2000,
+	"UnhealableClasses": { "_string": "Cavalry" },
+	"HealableClasses": { "_string": "Support Infantry" },
+};
+
+ApplyValueModificationsToEntity = function(value, stat, ent)
+{
+	if (ent != entity)
+		return stat;
+	switch (value)
+	{
+	case "Heal/HP":
+		return stat + 100;
+	case "Heal/Rate":
+		return stat + 200;
+	case "Heal/Range":
+		return stat + 300;
+	default:
+		return stat;
+	}
+};
+
+let cmpHeal = ConstructComponent(60, "Heal", template);
+
+// Test Getters
+TS_ASSERT_EQUALS(cmpHeal.GetRate(), 2000 + 200);
+
+TS_ASSERT_UNEVAL_EQUALS(cmpHeal.GetTimers(), { "prepare": 1000, "repeat": 2000 + 200 });
+
+TS_ASSERT_EQUALS(cmpHeal.GetHP(), 5 + 100);
+
+TS_ASSERT_UNEVAL_EQUALS(cmpHeal.GetRange(), {"min":0, "max": 20 + 300 });
+
+TS_ASSERT_EQUALS(cmpHeal.GetHealableClasses(), "Support Infantry");
+
+TS_ASSERT_EQUALS(cmpHeal.GetUnhealableClasses(), "Cavalry");
+
+TS_ASSERT_EQUALS(cmpHeal.GetLineTexture(), "heal_overlay_range.png");
+
+TS_ASSERT_EQUALS(cmpHeal.GetLineTextureMask(), "heal_overlay_range_mask.png");
+
+TS_ASSERT_EQUALS(cmpHeal.GetLineThickness(), 0.35);
+
+// Test PerformHeal
+let target = 70;
+
+let increased;
+AddMock(target, IID_Health, {
+	"GetMaxHitpoints": () => 700,
+	"Increase": amount => {
+		increased = true;
+		TS_ASSERT_EQUALS(amount, 5 + 100);
+		return { "old": 600, "new": 600 + 5 + 100 };
+	}
+});
+
+cmpHeal.PerformHeal(target);
+TS_ASSERT(increased);
+
+let looted;
+AddMock(target, IID_Loot, {
+	"GetXp": () => { looted = true; return 80; }
+});
+
+let promoted;
+AddMock(entity, IID_Promotion, {
+	"IncreaseXp": amount => {promoted = true; TS_ASSERT_EQUALS(amount, (5 + 100) * 80 / 700);}
+});
+
+increased = false;
+cmpHeal.PerformHeal(target);
+TS_ASSERT(increased && looted && promoted);
+
+// Test OnValueModification
+let updated;
+AddMock(entity, IID_UnitAI, {
+	"UpdateRangeQueries": () => { updated = true; },
+});
+
+cmpHeal.OnValueModification({ "component": "Heal", "valueNames": ["Heal/HP"] });
+TS_ASSERT(!updated);
+
+cmpHeal.OnValueModification({ "component": "Heal", "valueNames": ["Heal/Range"] });
+TS_ASSERT(updated);