fix: Add QP validation for groups with less than 2 qualities

CHANGELOG.md

@@ -10,7 +10,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-- Sync file naming configuration even if `rename` is not set to `true`.
+- Media Naming: Sync file naming configuration even if `rename` is not set to `true`.
+- Quality Profiles: Validation check added for quality groups with less than 2 qualities.
 
 ## [6.0.0] - 2023-09-29
 

src/Recyclarr.Config/Parsing/ConfigYamlDataObjectsValidation.cs

@@ -116,6 +116,7 @@ public class QualityProfileConfigYamlValidator : AbstractValidator<QualityProfil
 
         RuleFor(x => x.Qualities)
             .Custom(ValidateHaveNoDuplicates!)
+            .Custom(ValidateGroupQualityCount!)
             .Must(x => x!.Any(y => y.Enabled is true or null))
             .WithMessage(x =>
                 $"For profile {x.Name}, at least one explicitly listed quality under 'qualities' must be enabled.")
@@ -137,6 +138,22 @@ public class QualityProfileConfigYamlValidator : AbstractValidator<QualityProfil
             .When(x => x is {Upgrade.Allowed: not false, Qualities.Count: > 0});
     }
 
+    private static void ValidateGroupQualityCount(
+        IReadOnlyCollection<QualityProfileQualityConfigYaml> qualities,
+        ValidationContext<QualityProfileConfigYaml> context)
+    {
+        // Find groups with less than 2 items
+        var invalidCount = qualities
+            .Count(x => x.Qualities?.Count < 2);
+
+        if (invalidCount != 0)
+        {
+            var profile = context.InstanceToValidate;
+            context.AddFailure(
+                $"For profile {profile.Name}, 'qualities' contains {invalidCount} groups with less than 2 qualities");
+        }
+    }
+
     private static void ValidateHaveNoDuplicates(
         IReadOnlyCollection<QualityProfileQualityConfigYaml> qualities,
         ValidationContext<QualityProfileConfigYaml> context)

src/tests/Recyclarr.Tests/Config/Parsing/ConfigYamlDataObjectsValidationTest.cs

@@ -174,4 +174,83 @@ public class ConfigYamlDataObjectsValidationTest
         result.Errors.Select(x => x.ErrorMessage).Should().BeEquivalentTo(
             $"For profile {data.Name}, 'until_quality' must not refer to explicitly disabled qualities");
     }
+
+    [Test]
+    public void Empty_qualities_in_groups_not_allowed()
+    {
+        var data = new QualityProfileConfigYaml
+        {
+            Name = "Profile",
+            Qualities = new[]
+            {
+                new QualityProfileQualityConfigYaml
+                {
+                    Name = "Group",
+                    Qualities = Array.Empty<string>()
+                }
+            }
+        };
+
+        var validator = new QualityProfileConfigYamlValidator();
+        var result = validator.TestValidate(data);
+
+        result.ShouldHaveValidationErrorFor(x => x.Qualities);
+
+        result.Errors.Select(x => x.ErrorMessage).Should().BeEquivalentTo(
+            $"For profile {data.Name}, 'qualities' contains 1 groups with less than 2 qualities");
+    }
+
+    [Test]
+    public void Only_one_quality_in_groups_not_allowed()
+    {
+        var data = new QualityProfileConfigYaml
+        {
+            Name = "Profile",
+            Qualities = new[]
+            {
+                new QualityProfileQualityConfigYaml
+                {
+                    Name = "Group",
+                    Qualities = new[]
+                    {
+                        "One Quality"
+                    }
+                }
+            }
+        };
+
+        var validator = new QualityProfileConfigYamlValidator();
+        var result = validator.TestValidate(data);
+
+        result.ShouldHaveValidationErrorFor(x => x.Qualities);
+
+        result.Errors.Select(x => x.ErrorMessage).Should().BeEquivalentTo(
+            $"For profile {data.Name}, 'qualities' contains 1 groups with less than 2 qualities");
+    }
+
+    [Test]
+    public void Two_qualities_in_group_passes_validation()
+    {
+        var data = new QualityProfileConfigYaml
+        {
+            Name = "Profile",
+            Qualities = new[]
+            {
+                new QualityProfileQualityConfigYaml
+                {
+                    Name = "Group",
+                    Qualities = new[]
+                    {
+                        "One Quality",
+                        "Two Quality"
+                    }
+                }
+            }
+        };
+
+        var validator = new QualityProfileConfigYamlValidator();
+        var result = validator.TestValidate(data);
+
+        result.ShouldNotHaveAnyValidationErrors();
+    }
 }