Many more tests and fixes

Plugins/PkmnLib.Plugin.Gen7.Tests/Scripts/Moves/FalseSwipeTests.cs

@@ -0,0 +1,82 @@
+using PkmnLib.Dynamic.Models;
+using PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+namespace PkmnLib.Plugin.Gen7.Tests.Scripts.Moves;
+
+/// <summary>
+/// Tests for the <see cref="FalseSwipe"/> move script.
+/// Gen VII Bulbapedia behavior: "False Swipe inflicts damage, but will leave the target with 1 HP if it would
+/// otherwise cause it to faint. If the target has 1 HP remaining, False Swipe will hit and leave the target
+/// at 1 HP."
+/// </summary>
+public class FalseSwipeTests
+{
+    /// <summary>
+    /// Creates a fully mocked test setup where the target has the given current health.
+    /// </summary>
+    private static (FalseSwipe script, IExecutingMove move, IPokemon target) CreateTestSetup(uint currentHealth)
+    {
+        var script = new FalseSwipe();
+        var move = Substitute.For<IExecutingMove>();
+        var target = Substitute.For<IPokemon>();
+        target.CurrentHealth.Returns(currentHealth);
+        return (script, move, target);
+    }
+
+    /// <summary>
+    /// Bulbapedia: "False Swipe inflicts damage, but will leave the target with 1 HP if it would otherwise
+    /// cause it to faint." — damage exactly equal to the target's remaining HP is reduced to leave 1 HP.
+    /// The (1, 1, 0) row verifies "If the target has 1 HP remaining, False Swipe will hit and leave the
+    /// target at 1 HP."
+    /// </summary>
+    [Test, Arguments(50u, 50u, 49u), Arguments(100u, 100u, 99u), Arguments(1u, 1u, 0u)]
+    public async Task ChangeMoveDamage_DamageExactlyLethal_LeavesTargetWithOneHp(uint currentHealth, uint damage,
+        uint expectedDamage)
+    {
+        // Arrange
+        var (script, move, target) = CreateTestSetup(currentHealth);
+
+        // Act
+        script.ChangeMoveDamage(move, target, 0, ref damage);
+
+        // Assert
+        await Assert.That(damage).IsEqualTo(expectedDamage);
+    }
+
+    /// <summary>
+    /// Bulbapedia: "False Swipe inflicts damage, but will leave the target with 1 HP if it would otherwise
+    /// cause it to faint." — damage exceeding the target's remaining HP is also capped so the target is left
+    /// at 1 HP.
+    /// </summary>
+    [Test, Arguments(50u, 100u, 49u), Arguments(1u, 5u, 0u), Arguments(30u, 4000u, 29u)]
+    public async Task ChangeMoveDamage_DamageExceedsCurrentHealth_LeavesTargetWithOneHp(uint currentHealth, uint damage,
+        uint expectedDamage)
+    {
+        // Arrange
+        var (script, move, target) = CreateTestSetup(currentHealth);
+
+        // Act
+        script.ChangeMoveDamage(move, target, 0, ref damage);
+
+        // Assert
+        await Assert.That(damage).IsEqualTo(expectedDamage);
+    }
+
+    /// <summary>
+    /// Bulbapedia: "False Swipe inflicts damage" — when the damage would not cause the target to faint, it
+    /// is dealt in full.
+    /// </summary>
+    [Test, Arguments(100u, 50u), Arguments(100u, 99u), Arguments(2u, 1u)]
+    public async Task ChangeMoveDamage_DamageNotLethal_DamageUnchanged(uint currentHealth, uint damage)
+    {
+        // Arrange
+        var (script, move, target) = CreateTestSetup(currentHealth);
+        var originalDamage = damage;
+
+        // Act
+        script.ChangeMoveDamage(move, target, 0, ref damage);
+
+        // Assert
+        await Assert.That(damage).IsEqualTo(originalDamage);
+    }
+}