use typealias to increase test maintainability

Author: alexdeem

Tests/EnvironmentDecoderTests/EnvironmentDecoderCustomTypeTests.swift

@@ -4,38 +4,40 @@ import Testing
 
 struct EnvironmentDecoderCustomTypeTests {
     @Test func base64DataTest() throws {
-        #expect(try decode("", as: Data.self) == Data())
-        #expect(try decode("AQIDBAUGBwg=", as: Data.self) == Data([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]))
-        #expect(try decode("VGhlIHF1aWNrIGJyb3duIGZveCBqdW1wZWQgb3ZlciB0aGUgbGF6eSBkb2ch", as: Data.self)
-            == Data("The quick brown fox jumped over the lazy dog!".utf8))
-        #expect(try decode("VGhl,cXVpY2s=,YnJvd24=,Zm94", as: [Data].self)
-            == ["The", "quick", "brown", "fox"].map { Data($0.utf8) })
+        typealias T = Data
+        #expect(try decode("", as: T.self) == T())
+        #expect(try decode("AQIDBAUGBwg=", as: T.self) == T([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]))
+        #expect(try decode("VGhlIHF1aWNrIGJyb3duIGZveCBqdW1wZWQgb3ZlciB0aGUgbGF6eSBkb2ch", as: T.self)
+            == T("The quick brown fox jumped over the lazy dog!".utf8))
+        #expect(try decode("VGhl,cXVpY2s=,YnJvd24=,Zm94", as: [T].self)
+            == ["The", "quick", "brown", "fox"].map { T($0.utf8) })
         #expect(throws: Swift.DecodingError.self) {
-            try decode(" ", as: Data.self)
+            try decode(" ", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("invalid-base-64", as: Data.self)
+            try decode("invalid-base-64", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode(nil, as: Data.self)
+            try decode(nil, as: T.self)
         }
     }
 
     @Test func delegatedDataTest() throws {
+        typealias T = Data
         let decoder = EnvironmentDecoder(dataDecodingStrategy: .deferredToData)
-        #expect(try decode("", as: Data.self, with: decoder) == Data())
-        #expect(try decode("1,2,3,4,5,6,7,8", as: Data.self, with: decoder) == Data([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]))
-        #expect(try decode("0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8", as: Data.self, with: decoder) == Data([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]))
-        #expect(try decode("0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08", as: Data.self, with: decoder) == Data([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]))
-        #expect(try decode("0x54,0x68,0x65,0x20,0x71,0x75,0x69,0x63,0x6b,0x20,0x62,0x72,0x6f,0x77,0x6e,0x20,0x66,0x6f,0x78,0x20,0x6a,0x75,0x6d,0x70,0x65,0x64,0x20,0x6f,0x76,0x65,0x72,0x20,0x74,0x68,0x65,0x20,0x6c,0x61,0x7a,0x79,0x20,0x64,0x6f,0x67,0x21", as: Data.self, with: decoder)
-            == Data("The quick brown fox jumped over the lazy dog!".utf8))
-        #expect(try decode("VGhl,cXVpY2s=,YnJvd24=,Zm94", as: [Data].self)
-            == ["The", "quick", "brown", "fox"].map { Data($0.utf8) })
+        #expect(try decode("", as: T.self, with: decoder) == T())
+        #expect(try decode("1,2,3,4,5,6,7,8", as: T.self, with: decoder) == T([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]))
+        #expect(try decode("0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8", as: T.self, with: decoder) == T([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]))
+        #expect(try decode("0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08", as: T.self, with: decoder) == T([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]))
+        #expect(try decode("0x54,0x68,0x65,0x20,0x71,0x75,0x69,0x63,0x6b,0x20,0x62,0x72,0x6f,0x77,0x6e,0x20,0x66,0x6f,0x78,0x20,0x6a,0x75,0x6d,0x70,0x65,0x64,0x20,0x6f,0x76,0x65,0x72,0x20,0x74,0x68,0x65,0x20,0x6c,0x61,0x7a,0x79,0x20,0x64,0x6f,0x67,0x21", as: T.self, with: decoder)
+            == T("The quick brown fox jumped over the lazy dog!".utf8))
+        #expect(try decode("VGhl,cXVpY2s=,YnJvd24=,Zm94", as: [T].self)
+            == ["The", "quick", "brown", "fox"].map { T($0.utf8) })
         #expect(throws: Swift.DecodingError.self) {
-            try decode(" ", as: Data.self)
+            try decode(" ", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("invalid,int,array", as: Data.self)
+            try decode("invalid,int,array", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
             try decode(nil, as: Data.self)
@@ -105,69 +107,71 @@ struct EnvironmentDecoderCustomTypeTests {
     }
 
     @Test func decimalTest() throws {
+        typealias T = Decimal
         let formatter = Decimal.FormatStyle(locale: .init(identifier: ""))
             .precision(.integerAndFractionLength(integerLimits: 1...10, fractionLimits: 0...10))
 
-        #expect(try decode("0", as: Decimal.self).formatted(formatter) == "0")
-        #expect(try decode("+0", as: Decimal.self).formatted(formatter) == "0")
-        #expect(try decode("-0", as: Decimal.self).formatted(formatter) == "0")
-        #expect(try decode("3.1415926", as: Decimal.self).formatted(formatter) == "3.1415926")
-        #expect(try decode("+3.1415926", as: Decimal.self).formatted(formatter) == "3.1415926")
-        #expect(try decode("-3.1415926", as: Decimal.self).formatted(formatter) == "-3.1415926")
-        #expect(try decode("3", as: Decimal.self).formatted(formatter) == "3")
-        #expect(try decode("+3", as: Decimal.self).formatted(formatter) == "3")
-        #expect(try decode("-3", as: Decimal.self).formatted(formatter) == "-3")
-        #expect(try decode("2837.5e-2", as: Decimal.self).formatted(formatter) == "28.375")
-        #expect(try decode("-2837.5e-2", as: Decimal.self).formatted(formatter) == "-28.375")
-        #expect(try decode(" 5.0", as: Decimal.self).formatted(formatter) == "5")
-        #expect(try decode("42degrees", as: Decimal.self).formatted(formatter) == "42")
-        #expect(try decode(" 1.23", as: Decimal.self).formatted(formatter) == "1.23")
-        #expect(try decode("1.23 ", as: Decimal.self).formatted(formatter) == "1.23")
-        #expect(try decode("3,3.14,-3", as: [Decimal].self).map { $0.formatted(formatter) } == ["3", "3.14", "-3"])
+        #expect(try decode("0", as: T.self).formatted(formatter) == "0")
+        #expect(try decode("+0", as: T.self).formatted(formatter) == "0")
+        #expect(try decode("-0", as: T.self).formatted(formatter) == "0")
+        #expect(try decode("3.1415926", as: T.self).formatted(formatter) == "3.1415926")
+        #expect(try decode("+3.1415926", as: T.self).formatted(formatter) == "3.1415926")
+        #expect(try decode("-3.1415926", as: T.self).formatted(formatter) == "-3.1415926")
+        #expect(try decode("3", as: T.self).formatted(formatter) == "3")
+        #expect(try decode("+3", as: T.self).formatted(formatter) == "3")
+        #expect(try decode("-3", as: T.self).formatted(formatter) == "-3")
+        #expect(try decode("2837.5e-2", as: T.self).formatted(formatter) == "28.375")
+        #expect(try decode("-2837.5e-2", as: T.self).formatted(formatter) == "-28.375")
+        #expect(try decode(" 5.0", as: T.self).formatted(formatter) == "5")
+        #expect(try decode("42degrees", as: T.self).formatted(formatter) == "42")
+        #expect(try decode(" 1.23", as: T.self).formatted(formatter) == "1.23")
+        #expect(try decode("1.23 ", as: T.self).formatted(formatter) == "1.23")
+        #expect(try decode("3,3.14,-3", as: [T].self).map { $0.formatted(formatter) } == ["3", "3.14", "-3"])
         #expect(throws: Swift.DecodingError.self) {
-            try decode("inf", as: Decimal.self)
+            try decode("inf", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("infinity", as: Decimal.self)
+            try decode("infinity", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("nan", as: Decimal.self)
+            try decode("nan", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("1.23e17802", as: Decimal.self)
+            try decode("1.23e17802", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("-1.23e17802", as: Decimal.self)
+            try decode("-1.23e17802", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("±2.0", as: Decimal.self)
+            try decode("±2.0", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode(nil, as: Decimal.self)
+            try decode(nil, as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("", as: Decimal.self)
+            try decode("", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("helloworld", as: Decimal.self)
+            try decode("helloworld", as: T.self)
         }
     }
 
     @Test func urlTest() throws {
-        #expect(try decode("https://example.com", as: URL.self).absoluteString == "https://example.com")
-        #expect(try decode("example.com", as: URL.self).absoluteString == "example.com")
-        #expect(try decode("a.example.com,b.example.com", as: [URL].self).map(\.absoluteString) == ["a.example.com", "b.example.com"])
+        typealias T = URL
+        #expect(try decode("https://example.com", as: T.self).absoluteString == "https://example.com")
+        #expect(try decode("example.com", as: T.self).absoluteString == "example.com")
+        #expect(try decode("a.example.com,b.example.com", as: [T].self).map(\.absoluteString) == ["a.example.com", "b.example.com"])
         #expect(throws: Swift.DecodingError.self) {
-            try decode("", as: URL.self)
+            try decode("", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode(nil, as: URL.self)
+            try decode(nil, as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode(" https://example.com", as: URL.self)
+            try decode(" https://example.com", as: T.self)
         }
         #expect(throws: Swift.DecodingError.self) {
-            try decode("https://example.com ", as: URL.self)
+            try decode("https://example.com ", as: T.self)
         }
     }
 }