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ios/recipies.md

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+---
+layout: default
+title: Recipies
+categories: swift
+---
+
+```swift
+
+extension UIFont {
+	var bold: UIFont {
+		guard let newDescriptor = fontDescriptor.withSymbolicTraits(.traitBold) else {
+		 	return self
+		}
+		return UIFont(descriptor: newDescriptor, size: pointSize)
+	}
+}
+```
+
+```swift
+public struct FontStyle: ViewModifier {
+    let isBold: Bool
+    private let font: Font
+    
+    public init(isBold: Bool = false) {
+        self.isBold = isBold
+        self.font = self.font.bold
+    }
+    
+    public func body(content: Self.Content) -> some View {
+        content.font(font)
+    }
+}
+
+extension View {
+    public func fontStyle(isBold: Bool = false) -> some View {
+        modifier(FontStyle(isBold: isBold))
+    }
+}
+```
+
+
+## Testing
+
+```swift
+class ExampleXCTestCase: XCTestCase {
+    let app = XCUIApplication()
+    
+    override func tearDown() {
+        app.terminate()
+    }
+    
+    override func tearDownWithError() throws {
+        app.terminate()
+    }
+}
+```
+
+In tests (it has to be called before `app.launch()`)
+
+```swift
+launchEnvironment["key"] = "value"
+```
+
+in the app:
+
+```swift
+ProcessInfo.processInfo.environment["key"]
+```