From 52a7ba871a54704453adf088512f9cb608008066 Mon Sep 17 00:00:00 2001
From: Tom Hicks <headhunter3@gmail.com>
Date: Sun, 13 Sep 2020 02:47:58 -0700
Subject: [PATCH] Adds abilityModifierForScore and tests.

---
 iOS/MonsterCards/Models/Monster.m           |  2 +-
 iOS/MonsterCardsTests/Models/MonsterTests.m | 25 +++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/iOS/MonsterCards/Models/Monster.m b/iOS/MonsterCards/Models/Monster.m
index 23c5a16..6f2eb1d 100644
--- a/iOS/MonsterCards/Models/Monster.m
+++ b/iOS/MonsterCards/Models/Monster.m
@@ -44,7 +44,7 @@
 @synthesize wisdomScore;
 
 +(int)abilityModifierForScore: (int)score {
-    @throw [[NSException alloc] initWithName:@"unimplemented" reason:@"Method not implemented." userInfo:nil];
+    return (int)floor((score - 10) / 2.0);
 }
 
 +(int)hitDieForSize: (NSString*)size{
diff --git a/iOS/MonsterCardsTests/Models/MonsterTests.m b/iOS/MonsterCardsTests/Models/MonsterTests.m
index 224aa70..8324113 100644
--- a/iOS/MonsterCardsTests/Models/MonsterTests.m
+++ b/iOS/MonsterCardsTests/Models/MonsterTests.m
@@ -206,4 +206,29 @@
     XCTAssertEqualObjects(@"large humanoid (elf) chaotic good", _monster.meta);
 }
 
+- (void)testAbilityModifierForScore {
+    XCTAssertEqual(-6, [Monster abilityModifierForScore:-1]);
+    XCTAssertEqual(-5, [Monster abilityModifierForScore:0]);
+    XCTAssertEqual(-5, [Monster abilityModifierForScore:1]);
+    XCTAssertEqual(-4, [Monster abilityModifierForScore:2]);
+    XCTAssertEqual(-4, [Monster abilityModifierForScore:3]);
+    XCTAssertEqual(-3, [Monster abilityModifierForScore:4]);
+    XCTAssertEqual(-3, [Monster abilityModifierForScore:5]);
+    XCTAssertEqual(-2, [Monster abilityModifierForScore:6]);
+    XCTAssertEqual(-2, [Monster abilityModifierForScore:7]);
+    XCTAssertEqual(-1, [Monster abilityModifierForScore:8]);
+    XCTAssertEqual(-1, [Monster abilityModifierForScore:9]);
+    XCTAssertEqual(0, [Monster abilityModifierForScore:10]);
+    XCTAssertEqual(0, [Monster abilityModifierForScore:11]);
+    XCTAssertEqual(1, [Monster abilityModifierForScore:12]);
+    XCTAssertEqual(1, [Monster abilityModifierForScore:13]);
+    XCTAssertEqual(2, [Monster abilityModifierForScore:14]);
+    XCTAssertEqual(2, [Monster abilityModifierForScore:15]);
+    XCTAssertEqual(3, [Monster abilityModifierForScore:16]);
+    XCTAssertEqual(3, [Monster abilityModifierForScore:17]);
+    XCTAssertEqual(4, [Monster abilityModifierForScore:18]);
+    XCTAssertEqual(4, [Monster abilityModifierForScore:19]);
+    XCTAssertEqual(5, [Monster abilityModifierForScore:20]);
+}
+
 @end