introduce base class for unit tests to avoid code duplication

src/World.Net.UnitTests/Countries/FaroeIslandsTest.cs

@@ -1,7 +1,11 @@
-namespace World.Net.UnitTests.Countries;
+using System.Reflection.Metadata;
+using System.Xml.Linq;
 
-public sealed class FaroeIslandsTest
+namespace World.Net.UnitTests.Countries;
+
+public sealed class FaroeIslandsTest : AssertCountryTestBase
 {
+    private static CountryIdentifier Id => CountryIdentifier.FaroeIslands;
     private const string FAROEISLANDS_COUNTRY_NAME = "Faroe Islands";
     private const string FAROEISLANDS_NATIVE_NAME = "Føroyar";
     private const string FAROEISLANDS_CAPITAL = "Tórshavn";
@@ -10,32 +14,38 @@ public sealed class FaroeIslandsTest
     private const string FAROEISLANDS_ISO3_CODE = "FRO";
     private const int FAROEISLANDS_NUMERIC_CODE = 234;
     private readonly string[] FAROEISLANDS_CALLING_CODE = ["+298"];
-    private const int FAROEISLANDS_STATE_COUNT = 6; // 6 regions
-    private static readonly string[] VALID_STATE_TYPES = { "Region" };
+    private static readonly (string Name, string IsoCode, string Type)[] States =
+    [
+        new("Eysturoy", "FO-01", "Region"),
+        new("Norðoyar", "FO-02", "Region"),
+        new("Sandoy", "FO-03", "Region"),
+        new("Streymoy", "FO-04", "Region"),
+        new("Suðuroy", "FO-05", "Region"),
+        new("Vágar", "FO-06", "Region")
+    ];
 
     [Fact]
     public void GetCountry_ReturnsCorrectInformation_ForFaroeIslands()
     {
         // Arrange
-        CountryIdentifier existingCountryId = CountryIdentifier.FaroeIslands;
-
         // Act
-        var country = CountryProvider.GetCountry(existingCountryId);
 
         // Assert
-        Assert.NotNull(country);
-        Assert.Equal(existingCountryId, country.Id);
-        Assert.Equal(FAROEISLANDS_COUNTRY_NAME, country.Name);
-        Assert.Equal(FAROEISLANDS_OFFICIAL_NAME, country.OfficialName);
-        Assert.Equal(FAROEISLANDS_NATIVE_NAME, country.NativeName);
-        Assert.Equal(FAROEISLANDS_CAPITAL, country.Capital);
-        Assert.Equal(FAROEISLANDS_NUMERIC_CODE, country.NumericCode);
-        Assert.Equal(FAROEISLANDS_ISO2_CODE, country.ISO2Code);
-        Assert.Equal(FAROEISLANDS_ISO3_CODE, country.ISO3Code);
-        Assert.Equal(FAROEISLANDS_CALLING_CODE, country.CallingCode);
-        Assert.NotNull(country.States);
-        Assert.Equal(FAROEISLANDS_STATE_COUNT, country.States.Count());
-        Assert.All(country.States, state => Assert.Contains(state.Type, VALID_STATE_TYPES));
+        var country = CountryProvider.GetCountry(Id);
+
+        AssertCorrectInformation(
+            country,
+            Id,
+            FAROEISLANDS_COUNTRY_NAME,
+            FAROEISLANDS_OFFICIAL_NAME,
+            FAROEISLANDS_NATIVE_NAME,
+            FAROEISLANDS_CAPITAL,
+            FAROEISLANDS_NUMERIC_CODE,
+            FAROEISLANDS_ISO2_CODE,
+            FAROEISLANDS_ISO3_CODE,
+            FAROEISLANDS_CALLING_CODE,
+            States
+        );
     }
 }
 

src/World.Net.UnitTests/Countries/FijiIslandsTest.cs

@@ -1,6 +1,6 @@
 namespace World.Net.UnitTests.Countries;
 
-public sealed class FijiIslandsTest
+public sealed class FijiIslandsTest : AssertCountryTestBase
 {
     private const string FIJI_COUNTRY_NAME = "Fiji";
     private const string FIJI_NATIVE_NAME = "Matanitu ko Viti";
@@ -10,32 +10,47 @@ public sealed class FijiIslandsTest
     private const string FIJI_ISO3_CODE = "FJI";
     private const int FIJI_NUMERIC_CODE = 242;
     private readonly string[] FIJI_CALLING_CODE = ["+679"];
-    private const int FIJI_STATE_COUNT = 15; // 14 provinces + 1 dependency
-    private static readonly string[] VALID_STATE_TYPES = { "Province", "Dependency" };
+    private const CountryIdentifier ExpectedId = CountryIdentifier.FijiIslands;
+    private static readonly (string Name, string IsoCode, string Type)[] States =
+    [
+        new("Ba", "FJ-01", "Province"),
+        new("Bua", "FJ-02", "Province"),
+        new("Cakaudrove", "FJ-03", "Province"),
+        new("Kadavu", "FJ-04", "Province"),
+        new("Lau", "FJ-05", "Province"),
+        new("Lomaiviti", "FJ-06", "Province"),
+        new("Macuata", "FJ-07", "Province"),
+        new("Nadroga-Navosa", "FJ-08", "Province"),
+        new("Naitasiri", "FJ-09", "Province"),
+        new("Namosi", "FJ-10", "Province"),
+        new("Ra", "FJ-11", "Province"),
+        new("Rewa", "FJ-12", "Province"),
+        new("Serua", "FJ-13", "Province"),
+        new("Tailevu", "FJ-14", "Province"),
+        new("Rotuma", "FJ-15", "Dependency")
+    ];
 
     [Fact]
     public void GetCountry_ReturnsCorrectInformation_ForFiji()
     {
         // Arrange
-        CountryIdentifier existingCountryId = CountryIdentifier.FijiIslands;
-
         // Act
-        var country = CountryProvider.GetCountry(existingCountryId);
-
+        var country = CountryProvider.GetCountry(ExpectedId);
+        
         // Assert
-        Assert.NotNull(country);
-        Assert.Equal(existingCountryId, country.Id);
-        Assert.Equal(FIJI_COUNTRY_NAME, country.Name);
-        Assert.Equal(FIJI_OFFICIAL_NAME, country.OfficialName);
-        Assert.Equal(FIJI_NATIVE_NAME, country.NativeName);
-        Assert.Equal(FIJI_CAPITAL, country.Capital);
-        Assert.Equal(FIJI_NUMERIC_CODE, country.NumericCode);
-        Assert.Equal(FIJI_ISO2_CODE, country.ISO2Code);
-        Assert.Equal(FIJI_ISO3_CODE, country.ISO3Code);
-        Assert.Equal(FIJI_CALLING_CODE, country.CallingCode);
-        Assert.NotNull(country.States);
-        Assert.Equal(FIJI_STATE_COUNT, country.States.Count());
-        Assert.All(country.States, state => Assert.Contains(state.Type, VALID_STATE_TYPES));
+        AssertCorrectInformation(
+            country,
+            ExpectedId,
+            FIJI_COUNTRY_NAME,
+            FIJI_OFFICIAL_NAME,
+            FIJI_NATIVE_NAME,
+            FIJI_CAPITAL,
+            FIJI_NUMERIC_CODE,
+            FIJI_ISO2_CODE,
+            FIJI_ISO3_CODE,
+            FIJI_CALLING_CODE,
+            States
+        );
     }
 }
 

src/World.Net.UnitTests/Countries/FranceTest.cs

@@ -1,39 +1,155 @@
 namespace World.Net.UnitTests.Countries;
-public sealed class FranceTest
+public sealed class FranceTest : AssertCountryTestBase
 {
     private const string FRANCE_NAME = "France";
-    private const int FRANCE_STATE_COUNT = 116;
     private const string FRANCE_OFFICIAL_NAME = "French Republic";
     private const string FRANCE_NATIVE_NAME = "France";
     private const string FRANCE_CAPITAL = "Paris";
     private const int FRANCE_NUMERIC_CODE = 250;
     private const string FRANCE_ISO2_CODE = "FR";
-    private static readonly string[] VALID_STATE_TYPES = { "metropolitan department", "European collectivity", "metropolitan region", "dependency", "metropolitan collectivity with special status", "overseas region", "overseas collectivity", "overseas territory", "overseas region", "metropolitan department", "metropolitan department", };
     private const string FRANCE_ISO3_CODE = "FRA";
     private readonly string[] FRANCE_CALLING_CODE = ["+33"];
-
+    private const CountryIdentifier ExpectedId = CountryIdentifier.France;
+    private static readonly (string Name, string IsoCode, string Type)[] ExpectedStates = 
+    [
+        new("Ain", "FR-01", "metropolitan department"),
+        new("Aisne", "FR-02", "metropolitan department"),
+        new("Allier", "FR-03", "metropolitan department"),
+        new("Alpes-de-Haute-Provence", "FR-04", "metropolitan department"),
+        new("Alpes-Maritimes", "FR-06", "metropolitan department"),
+        new("Alsace", "FR-6AE", "European collectivity"),
+        new("Ardèche", "FR-07", "metropolitan department"),
+        new("Ardennes", "FR-08", "metropolitan department"),
+        new("Ariège", "FR-09", "metropolitan department"),
+        new("Aube", "FR-10", "metropolitan department"),
+        new("Aude", "FR-11", "metropolitan department"),
+        new("Auvergne-Rhône-Alpes", "FR-ARA", "metropolitan region"),
+        new("Aveyron", "FR-12", "metropolitan department"),
+        new("Bas-Rhin", "FR-67", "metropolitan department"),
+        new("Bouches-du-Rhône", "FR-13", "metropolitan department"),
+        new("Bourgogne-Franche-Comté", "FR-BFC", "metropolitan region"),
+        new("Bretagne", "FR-BRE", "metropolitan region"),
+        new("Calvados", "FR-14", "metropolitan department"),
+        new("Cantal", "FR-15", "metropolitan department"),
+        new("Centre-Val de Loire", "FR-CVL", "metropolitan region"),
+        new("Charente", "FR-16", "metropolitan department"),
+        new("Charente-Maritime", "FR-17", "metropolitan department"),
+        new("Cher", "FR-18", "metropolitan department"),
+        new("Clipperton", "FR-CP", "dependency"),
+        new("Corrèze", "FR-19", "metropolitan department"),
+        new("Corse", "FR-20R", "metropolitan collectivity with special status"),
+        new("Corse-du-Sud", "FR-2A", "metropolitan department"),
+        new("Côte-d'Or", "FR-21", "metropolitan department"),
+        new("Côtes-d'Armor", "FR-22", "metropolitan department"),
+        new("Creuse", "FR-23", "metropolitan department"),
+        new("Deux-Sèvres", "FR-79", "metropolitan department"),
+        new("Dordogne", "FR-24", "metropolitan department"),
+        new("Doubs", "FR-25", "metropolitan department"),
+        new("Drôme", "FR-26", "metropolitan department"),
+        new("Essonne", "FR-91", "metropolitan department"),
+        new("Eure", "FR-27", "metropolitan department"),
+        new("Eure-et-Loir", "FR-28", "metropolitan department"),
+        new("Finistère", "FR-29", "metropolitan department"),
+        new("French Guiana", "FR-973", "overseas region"),
+        new("French Polynesia", "FR-PF", "overseas collectivity"),
+        new("French Southern and Antarctic Lands", "FR-TF", "overseas territory"),
+        new("Gard", "FR-30", "metropolitan department"),
+        new("Gers", "FR-32", "metropolitan department"),
+        new("Gironde", "FR-33", "metropolitan department"),
+        new("Grand-Est", "FR-GES", "metropolitan region"),
+        new("Guadeloupe", "FR-971", "overseas region"),
+        new("Haut-Rhin", "FR-68", "metropolitan department"),
+        new("Haute-Corse", "FR-2B", "metropolitan department"),
+        new("Haute-Garonne", "FR-31", "metropolitan department"),
+        new("Haute-Loire", "FR-43", "metropolitan department"),
+        new("Haute-Marne", "FR-52", "metropolitan department"),
+        new("Haute-Saône", "FR-70", "metropolitan department"),
+        new("Haute-Savoie", "FR-74", "metropolitan department"),
+        new("Haute-Vienne", "FR-87", "metropolitan department"),
+        new("Hautes-Alpes", "FR-05", "metropolitan department"),
+        new("Hautes-Pyrénées", "FR-65", "metropolitan department"),
+        new("Hauts-de-France", "FR-HDF", "metropolitan region"),
+        new("Hauts-de-Seine", "FR-92", "metropolitan department"),
+        new("Hérault", "FR-34", "metropolitan department"),
+        new("Île-de-France", "FR-IDF", "metropolitan region"),
+        new("Ille-et-Vilaine", "FR-35", "metropolitan department"),
+        new("Indre", "FR-36", "metropolitan department"),
+        new("Indre-et-Loire", "FR-37", "metropolitan department"),
+        new("Isère", "FR-38", "metropolitan department"),
+        new("Jura", "FR-39", "metropolitan department"),
+        new("La Réunion", "FR-974", "overseas region"),
+        new("Landes", "FR-40", "metropolitan department"),
+        new("Loir-et-Cher", "FR-41", "metropolitan department"),
+        new("Loire", "FR-42", "metropolitan department"),
+        new("Loire-Atlantique", "FR-44", "metropolitan department"),
+        new("Loiret", "FR-45", "metropolitan department"),
+        new("Lot", "FR-46", "metropolitan department"),
+        new("Lot-et-Garonne", "FR-47", "metropolitan department"),
+        new("Lozère", "FR-48", "metropolitan department"),
+        new("Maine-et-Loire", "FR-49", "metropolitan department"),
+        new("Manche", "FR-50", "metropolitan department"),
+        new("Marne", "FR-51", "metropolitan department"),
+        new("Martinique", "FR-972", "overseas region"),
+        new("Mayenne", "FR-53", "metropolitan department"),
+        new("Mayotte", "FR-976", "overseas region"),
+        new("Métropole de Lyon", "FR-69M", "metropolitan department"),
+        new("Meurthe-et-Moselle", "FR-54", "metropolitan department"),
+        new("Meuse", "FR-55", "metropolitan department"),
+        new("Morbihan", "FR-56", "metropolitan department"),
+        new("Moselle", "FR-57", "metropolitan department"),
+        new("Nièvre", "FR-58", "metropolitan department"),
+        new("Nord", "FR-59", "metropolitan department"),
+        new("Oise", "FR-60", "metropolitan department"),
+        new("Oléron", "FR-OL", "dependency"),
+        new("Orne", "FR-61", "metropolitan department"),
+        new("Paris", "FR-75", "metropolitan department"),
+        new("Pas-de-Calais", "FR-62", "metropolitan department"),
+        new("Puy-de-Dôme", "FR-63", "metropolitan department"),
+        new("Pyrénées-Atlantiques", "FR-64", "metropolitan department"),
+        new("Pyrénées-Orientales", "FR-66", "metropolitan department"),
+        new("Réunion", "FR-974", "overseas region"),
+        new("Rhône", "FR-69", "metropolitan department"),
+        new("Saône-et-Loire", "FR-71", "metropolitan department"),
+        new("Sarthe", "FR-72", "metropolitan department"),
+        new("Savoie", "FR-73", "metropolitan department"),
+        new("Seine-et-Marne", "FR-77", "metropolitan department"),
+        new("Seine-Maritime", "FR-76", "metropolitan department"),
+        new("Yvelines", "FR-78", "metropolitan department"),
+        new("Somme", "FR-80", "metropolitan department"),
+        new("Tarn", "FR-81", "metropolitan department"),
+        new("Tarn-et-Garonne", "FR-82", "metropolitan department"),
+        new("Territoire de Belfort", "FR-90", "metropolitan department"),
+        new("Val-de-Marne", "FR-94", "metropolitan department"),
+        new("Val-d'Oise", "FR-95", "metropolitan department"),
+        new("Var", "FR-83", "metropolitan department"),
+        new("Vaucluse", "FR-84", "metropolitan department"),
+        new("Vendée", "FR-85", "metropolitan department"),
+        new("Vienne", "FR-86", "metropolitan department"),
+        new("Vosges", "FR-88", "metropolitan department"),
+        new("Yonne", "FR-89", "metropolitan department"),
+        new("Yvelines", "FR-78", "metropolitan department")
+    ];
 
     [Fact]
     public void GetCountry_ReturnsCorrectInformation_ForFrance()
     {
         // Arrange
-        CountryIdentifier existingCountryId = CountryIdentifier.France;
-
         // Act
-        var country = CountryProvider.GetCountry(existingCountryId);
+        var country = CountryProvider.GetCountry(ExpectedId);
 
         //Assert
-        Assert.Equal(existingCountryId, country.Id);
-        Assert.Equal(FRANCE_NAME, country.Name);
-        Assert.NotNull(country.States);
-        Assert.Equal(FRANCE_STATE_COUNT, country.States.Count());
-        Assert.Equal(FRANCE_OFFICIAL_NAME, country.OfficialName);
-        Assert.Equal(FRANCE_NATIVE_NAME, country.NativeName);
-        Assert.Equal(FRANCE_CAPITAL, country.Capital);
-        Assert.All(country.States, state => Assert.Contains(state.Type, VALID_STATE_TYPES));
-        Assert.Equal(FRANCE_NUMERIC_CODE, country.NumericCode);
-        Assert.Equal(FRANCE_ISO2_CODE, country.ISO2Code);
-        Assert.Equal(FRANCE_ISO3_CODE, country.ISO3Code);
-        Assert.Equal(FRANCE_CALLING_CODE, country.CallingCode);
+        AssertCorrectInformation(
+            country,
+            ExpectedId,
+            FRANCE_NAME,
+            FRANCE_OFFICIAL_NAME,
+            FRANCE_NATIVE_NAME,
+            FRANCE_CAPITAL,
+            FRANCE_NUMERIC_CODE,
+            FRANCE_ISO2_CODE,
+            FRANCE_ISO3_CODE,
+            FRANCE_CALLING_CODE,
+            ExpectedStates
+        );
     }
 }

src/World.Net.UnitTests/Countries/FrenchGuianaTest.cs

@@ -1,5 +1,5 @@
 namespace World.Net.UnitTests.Countries;
-public sealed class FrenchGuianaTest
+public sealed class FrenchGuianaTest : AssertCountryTestBase
 {
     private const string FRENCH_GUIANA_NAME = "French Guiana";
     private const string FRENCH_GUIANA_OFFICIAL_NAME = "Guyane française";
@@ -9,28 +9,31 @@ public sealed class FrenchGuianaTest
     private const string FRENCH_GUIANA_ISO2_CODE = "GF";
     private const string FRENCH_GUIANA_ISO3_CODE = "GUF";
     private readonly string[] FRENCH_GUIANA_CALLING_CODE = ["+594"];
-
+    private const CountryIdentifier ExpectedId = CountryIdentifier.FrenchGuiana;
+    private static readonly (string Name, string IsoCode, string Type)[] ExpectedStates = 
+        [
+        ];
 
     [Fact]
     public void GetCountry_ReturnsCorrectInformation_ForFrench_Guiana()
     {
         // Arrange
-        CountryIdentifier existingCountryId = CountryIdentifier.FrenchGuiana;
-
         // Act
-        var country = CountryProvider.GetCountry(existingCountryId);
+        var country = CountryProvider.GetCountry(ExpectedId);
 
         //Assert
-        Assert.Equal(existingCountryId, country.Id);
-        Assert.Equal(FRENCH_GUIANA_NAME, country.Name);
-        Assert.NotNull(country.States);
-        Assert.Empty(country.States);
-        Assert.Equal(FRENCH_GUIANA_OFFICIAL_NAME, country.OfficialName);
-        Assert.Equal(FRENCH_GUIANA_NATIVE_NAME, country.NativeName);
-        Assert.Equal(FRENCH_GUIANA_CAPITAL, country.Capital);
-        Assert.Equal(FRENCH_GUIANA_NUMERIC_CODE, country.NumericCode);
-        Assert.Equal(FRENCH_GUIANA_ISO2_CODE, country.ISO2Code);
-        Assert.Equal(FRENCH_GUIANA_ISO3_CODE, country.ISO3Code);
-        Assert.Equal(FRENCH_GUIANA_CALLING_CODE, country.CallingCode);
+        AssertCorrectInformation(
+            country,
+            ExpectedId,
+            FRENCH_GUIANA_NAME,
+            FRENCH_GUIANA_OFFICIAL_NAME,
+            FRENCH_GUIANA_NATIVE_NAME,
+            FRENCH_GUIANA_CAPITAL,
+            FRENCH_GUIANA_NUMERIC_CODE,
+            FRENCH_GUIANA_ISO2_CODE,
+            FRENCH_GUIANA_ISO3_CODE,
+            FRENCH_GUIANA_CALLING_CODE,
+            ExpectedStates
+        );
     }
 }