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Add new rule to ensure
@State
properties are private
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,47 @@ | ||
// | ||
// PrivateStateVariables.swift | ||
// SwiftFormatTests | ||
// | ||
// Created by Dave Paul on 9/13/24. | ||
// Copyright © 2024 Nick Lockwood. All rights reserved. | ||
// | ||
|
||
import Foundation | ||
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public extension FormatRule { | ||
static let privateStateVariables = FormatRule( | ||
help: "Adds `private` access control to @State properties without existing access control modifiers.", | ||
disabledByDefault: true | ||
) { formatter in | ||
formatter.forEachToken(where: { $0 == .keyword("@State") || $0 == .keyword("@StateObject") }) { stateIndex, _ in | ||
guard let endOfScope = formatter.index(after: stateIndex, where: { | ||
$0 == .keyword("let") || $0 == .keyword("var") | ||
}) else { return } | ||
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// Don't override any existing access control: | ||
guard !formatter.tokens[stateIndex ..< endOfScope].contains(where: { | ||
_FormatRules.aclModifiers.contains($0.string) || _FormatRules.aclSetterModifiers.contains($0.string) | ||
}) else { | ||
return | ||
} | ||
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// Check for @Previewable - we won't modify @Previewable macros. | ||
let lineStart = formatter.startOfLine(at: stateIndex) | ||
guard !formatter.tokens[lineStart ..< stateIndex].contains(where: { $0 == .keyword("@Previewable") }) else { | ||
return | ||
} | ||
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||
formatter.insert([.keyword("private"), .space(" ")], at: endOfScope) | ||
} | ||
} examples: { | ||
""" | ||
```diff | ||
- @State var anInt: Int | ||
+ @State private var anInt: Int | ||
- @StateObject var myInstance: MyObject | ||
+ @StateObject private var myInstace: MyObject | ||
``` | ||
""" | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,87 @@ | ||
// | ||
// PrivateStateVariablesTests.swift | ||
// SwiftFormatTests | ||
// | ||
// Created by Dave Paul on 9/9/24. | ||
// Copyright © 2024 Nick Lockwood. All rights reserved. | ||
// | ||
|
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import XCTest | ||
@testable import SwiftFormat | ||
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class PrivateStateVariablesTests: XCTestCase { | ||
func testPrivateState() { | ||
let input = """ | ||
@State var counter: Int | ||
""" | ||
let output = """ | ||
@State private var counter: Int | ||
""" | ||
testFormatting(for: input, output, rule: .privateStateVariables) | ||
} | ||
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func testPrivateStateObject() { | ||
let input = """ | ||
@StateObject var counter: Int | ||
""" | ||
let output = """ | ||
@StateObject private var counter: Int | ||
""" | ||
testFormatting(for: input, output, rule: .privateStateVariables) | ||
} | ||
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func testUseExisting() { | ||
let input = """ | ||
@State private var counter: Int | ||
""" | ||
testFormatting(for: input, rule: .privateStateVariables) | ||
} | ||
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func testRespectingPublicOverride() { | ||
let input = """ | ||
@StateObject public var counter: Int | ||
""" | ||
testFormatting(for: input, rule: .privateStateVariables) | ||
} | ||
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func testRespectingPackageOverride() { | ||
let input = """ | ||
@State package var counter: Int | ||
""" | ||
testFormatting(for: input, rule: .privateStateVariables) | ||
} | ||
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func testRespectingOverrideWithSetterModifier() { | ||
let input = """ | ||
@State private(set) var counter: Int | ||
""" | ||
testFormatting(for: input, rule: .privateStateVariables) | ||
} | ||
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func testRespectingOverrideWithExistingAccessAndSetterModifier() { | ||
let input = """ | ||
@StateObject public private(set) var counter: Int | ||
""" | ||
testFormatting(for: input, rule: .privateStateVariables) | ||
} | ||
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func testStateVariableOnPreviousLine() { | ||
let input = """ | ||
@State | ||
var counter: Int | ||
""" | ||
let output = """ | ||
@State | ||
private var counter: Int | ||
""" | ||
testFormatting(for: input, output, rule: .privateStateVariables) | ||
} | ||
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func testWithPreviewable() { | ||
// Don't add `private` to @Previewable property wrappers: | ||
let input = """ | ||
@Previewable @StateObject var counter: Int | ||
""" | ||
testFormatting(for: input, rule: .privateStateVariables) | ||
} | ||
} |
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