Added some basic snapshot tests

Author: lukeredpath

Package.swift

@@ -7,23 +7,20 @@ let package = Package(
     name: "ResponsiveTextField",
     platforms: [.iOS(.v13)],
     products: [
-        // Products define the executables and libraries a package produces, and make them visible to other packages.
         .library(
             name: "ResponsiveTextField",
             targets: ["ResponsiveTextField"]),
     ],
     dependencies: [
-        // Dependencies declare other packages that this package depends on.
-        // .package(url: /* package url */, from: "1.0.0"),
+        .package(name: "SnapshotTesting", url: "https://github.com/pointfreeco/swift-snapshot-testing.git", from: "1.8.1")
     ],
     targets: [
-        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
-        // Targets can depend on other targets in this package, and on products in packages this package depends on.
         .target(
             name: "ResponsiveTextField",
             dependencies: []),
         .testTarget(
             name: "ResponsiveTextFieldTests",
-            dependencies: ["ResponsiveTextField"]),
+            dependencies: ["ResponsiveTextField", "SnapshotTesting"],
+            exclude: ["__Snapshots__"]),
     ]
 )

ResponsiveTextField.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "SnapshotTesting",
+        "repositoryURL": "https://github.com/pointfreeco/swift-snapshot-testing.git",
+        "state": {
+          "branch": null,
+          "revision": "c466812aa2e22898f27557e2e780d3aad7a27203",
+          "version": "1.8.2"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

Sources/ResponsiveTextField/ResponsiveTextField.swift

@@ -173,6 +173,10 @@ extension ResponsiveTextField {
     public struct Configuration {
         var configure: (UITextField) -> Void
 
+        public init(configure: @escaping (UITextField) -> Void) {
+            self.configure = configure
+        }
+
         public static func combine(_ configurations: Self...) -> Self {
             combine(configurations)
         }

Tests/LinuxMain.swift

@@ -1,15 +1,96 @@
 import XCTest
-@testable import ResponsiveTextField
+import ResponsiveTextField
+import SnapshotTesting
+import SwiftUI
+
+extension Snapshotting where Value: View, Format == UIImage {
+    static var fixedSizeTextFieldImage: Self {
+        .image(layout: .fixed(width: 320, height: 30))
+    }
+}
 
 final class ResponsiveTextFieldTests: XCTestCase {
-    func testExample() {
-        // This is an example of a functional test case.
-        // Use XCTAssert and related functions to verify your tests produce the correct
-        // results.
-        XCTAssertEqual(ResponsiveTextField().text, "Hello, World!")
+    func testEmptyTextField() {
+        assertSnapshot(
+            matching: ResponsiveTextField(
+                placeholder: "Placeholder Text",
+                text: .constant(""),
+                isEditing: .constant(true),
+                isSecure: false,
+                configuration: .empty
+            ).padding(),
+            as: .fixedSizeTextFieldImage
+        )
+    }
+
+    func testTextFieldWithText() {
+        assertSnapshot(
+            matching: ResponsiveTextField(
+                placeholder: "Placeholder Text",
+                text: .constant("Textfield with some text"),
+                isEditing: .constant(true),
+                isSecure: false,
+                configuration: .empty
+            ).padding(),
+            as: .fixedSizeTextFieldImage
+        )
     }
 
-    static var allTests = [
-        ("testExample", testExample),
-    ]
+    func testSecureTextEntry() {
+        assertSnapshot(
+            matching: ResponsiveTextField(
+                placeholder: "Placeholder Text",
+                text: .constant("ssh this is top secret"),
+                isEditing: .constant(true),
+                isSecure: true,
+                configuration: .empty
+            ).padding(),
+            as: .fixedSizeTextFieldImage
+        )
+    }
+
+    func testTextFieldCustomTextStyle() {
+        assertSnapshot(
+            matching: ResponsiveTextField(
+                placeholder: "Placeholder Text",
+                text: .constant("Textfield with some text"),
+                isEditing: .constant(true),
+                isSecure: false,
+                configuration: .empty
+            )
+            .responsiveTextFieldFont(.preferredFont(forTextStyle: .headline))
+            .responsiveTextFieldTextColor(.systemGreen)
+            .padding(),
+            as: .fixedSizeTextFieldImage
+        )
+    }
+
+    func testTextFieldCustomTextAlignment() {
+        assertSnapshot(
+            matching: ResponsiveTextField(
+                placeholder: "Placeholder Text",
+                text: .constant("Textfield with some text"),
+                isEditing: .constant(true),
+                isSecure: false,
+                configuration: .empty
+            )
+            .responsiveTextFieldTextAlignment(.center)
+            .padding(),
+            as: .fixedSizeTextFieldImage,
+            named: "Center"
+        )
+        assertSnapshot(
+            matching: ResponsiveTextField(
+                placeholder: "Placeholder Text",
+                text: .constant("Textfield with some text"),
+                isEditing: .constant(true),
+                isSecure: false,
+                configuration: .empty
+            )
+            .responsiveTextFieldTextAlignment(.right)
+            .padding(),
+            as: .fixedSizeTextFieldImage,
+            named: "Right"
+        )
+    }
 }