Fix component library tests and cover 0.0 V case

ComponentLibraryItem gained componentCategory, which left the test
target uncompilable. Add the argument to all call sites and a
regression test for displayVoltage skipping a zero voltageIn.

CableTests/ComponentLibraryItemTests.swift

@@ -14,6 +14,7 @@ struct ComponentLibraryItemTests {
             watt: nil,
             dutyCyclePercent: nil,
             defaultUtilizationFactorPercent: nil,
+            componentCategory: nil,
             iconURL: nil,
         )
 
@@ -31,6 +32,7 @@ struct ComponentLibraryItemTests {
             watt: nil,
             dutyCyclePercent: nil,
             defaultUtilizationFactorPercent: nil,
+            componentCategory: nil,
             iconURL: nil,
         )
 
@@ -51,6 +53,7 @@ struct ComponentLibraryItemTests {
             watt: nil,
             dutyCyclePercent: nil,
             defaultUtilizationFactorPercent: nil,
+            componentCategory: nil,
             iconURL: nil,
         )
 
@@ -68,6 +71,7 @@ struct ComponentLibraryItemTests {
             watt: nil,
             dutyCyclePercent: nil,
             defaultUtilizationFactorPercent: nil,
+            componentCategory: nil,
             iconURL: nil,
         )
 
@@ -85,6 +89,7 @@ struct ComponentLibraryItemTests {
             watt: nil,
             dutyCyclePercent: nil,
             defaultUtilizationFactorPercent: nil,
+            componentCategory: nil,
             iconURL: nil,
         )
 
@@ -102,6 +107,7 @@ struct ComponentLibraryItemTests {
             watt: nil,
             dutyCyclePercent: nil,
             defaultUtilizationFactorPercent: nil,
+            componentCategory: nil,
             iconURL: nil,
         )
 
@@ -119,6 +125,7 @@ struct ComponentLibraryItemTests {
             watt: nil,
             dutyCyclePercent: 0,
             defaultUtilizationFactorPercent: nil,
+            componentCategory: nil,
             iconURL: nil,
         )
 
@@ -135,9 +142,27 @@ struct ComponentLibraryItemTests {
             watt: nil,
             dutyCyclePercent: nil,
             defaultUtilizationFactorPercent: 50,
+            componentCategory: nil,
             iconURL: nil,
         )
 
         #expect(item.defaultDailyUsageHours == 12)
     }
+
+    @Test func displayVoltageIgnoresZeroInputVoltage() async throws {
+        let item = ComponentLibraryItem(
+            id: "component-9",
+            name: "Library Battery",
+            translations: [:],
+            voltageIn: 0,
+            voltageOut: 12.8,
+            watt: nil,
+            dutyCyclePercent: nil,
+            defaultUtilizationFactorPercent: nil,
+            componentCategory: nil,
+            iconURL: nil,
+        )
+
+        #expect(item.displayVoltage == 12.8)
+    }
 }