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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2025 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import SwiftFormat
/// These tests verify the breaking and grouping behavior of expression modifiers like `try`,
/// `await`, and `unsafe`.
final class ExpressionModifierTests: PrettyPrintTestCase {
func testBasicTries() {
let input =
"""
let a = try possiblyFailingFunc()
let a = try? possiblyFailingFunc()
let a = try! possiblyFailingFunc()
"""
let expected =
"""
let a = try possiblyFailingFunc()
let a = try? possiblyFailingFunc()
let a = try! possiblyFailingFunc()
"""
assertPrettyPrintEqual(input: input, expected: expected, linelength: 40)
}
func testTryKeywordBreaking() {
let input =
"""
let aVeryLongArgumentName = try foo.bar()
let aVeryLongArgumentName = try
foo.bar()
let aVeryLongArgumentName = try? foo.bar()
let abc = try foo.baz().quxxe(a, b, c).bar()
let abc = try foo
.baz().quxxe(a, b, c).bar()
let abc = try [1, 2, 3, 4, 5, 6, 7].baz().quxxe(a, b, c).bar()
let abc = try [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = try foo.baz().quxxe(a, b, c).bar[0]
let abc = try foo
.baz().quxxe(a, b, c).bar[0]
let abc = try
foo
.baz().quxxe(a, b, c).bar[0]
"""
let expected =
"""
let aVeryLongArgumentName =
try foo.bar()
let aVeryLongArgumentName =
try foo.bar()
let aVeryLongArgumentName =
try? foo.bar()
let abc = try foo.baz().quxxe(a, b, c)
.bar()
let abc =
try foo
.baz().quxxe(a, b, c).bar()
let abc = try [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = try [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = try foo.baz().quxxe(a, b, c)
.bar[0]
let abc =
try foo
.baz().quxxe(a, b, c).bar[0]
let abc =
try foo
.baz().quxxe(a, b, c).bar[0]
"""
assertPrettyPrintEqual(input: input, expected: expected, linelength: 40)
}
func testBasicAwaits() {
let input =
"""
let a = await asynchronousFunction()
let b = await longerAsynchronousFunction()
let c = await evenLongerAndLongerAsynchronousFunction()
"""
let expected =
"""
let a = await asynchronousFunction()
let b =
await longerAsynchronousFunction()
let c =
await
evenLongerAndLongerAsynchronousFunction()
"""
assertPrettyPrintEqual(input: input, expected: expected, linelength: 36)
}
func testAwaitKeywordBreaking() {
let input =
"""
let aVeryLongArgumentName = await foo.bar()
let aVeryLongArgumentName = await
foo.bar()
let abc = await foo.baz().quxxe(a, b, c).bar()
let abc = await foo
.baz().quxxe(a, b, c).bar()
let abc = await [1, 2, 3, 4, 5, 6, 7].baz().quxxe(a, b, c).bar()
let abc = await [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = await foo.baz().quxxe(a, b, c).bar[0]
let abc = await foo
.baz().quxxe(a, b, c).bar[0]
let abc = await
foo
.baz().quxxe(a, b, c).bar[0]
"""
let expected =
"""
let aVeryLongArgumentName =
await foo.bar()
let aVeryLongArgumentName =
await foo.bar()
let abc = await foo.baz().quxxe(a, b, c)
.bar()
let abc =
await foo
.baz().quxxe(a, b, c).bar()
let abc = await [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = await [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = await foo.baz().quxxe(a, b, c)
.bar[0]
let abc =
await foo
.baz().quxxe(a, b, c).bar[0]
let abc =
await foo
.baz().quxxe(a, b, c).bar[0]
"""
assertPrettyPrintEqual(input: input, expected: expected, linelength: 42)
}
func testTryAwaitKeywordBreaking() {
let input =
"""
let aVeryLongArgumentName = try await foo.bar()
let aVeryLongArgumentName = try await
foo.bar()
let abc = try await foo.baz().quxxe(a, b, c).bar()
let abc = try await foo
.baz().quxxe(a, b, c).bar()
let abc = try await [1, 2, 3, 4, 5, 6, 7].baz().quxxe(a, b, c).bar()
let abc = try await [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = try await foo.baz().quxxe(a, b, c).bar[0]
let abc = try await foo
.baz().quxxe(a, b, c).bar[0]
let abc = try await
foo
.baz().quxxe(a, b, c).bar[0]
let abc = try await thisIsASuperblyExtremelyVeryLongFunctionName()
"""
let expected =
"""
let aVeryLongArgumentName =
try await foo.bar()
let aVeryLongArgumentName =
try await foo.bar()
let abc = try await foo.baz().quxxe(a, b, c)
.bar()
let abc =
try await foo
.baz().quxxe(a, b, c).bar()
let abc = try await [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = try await [1, 2, 3, 4, 5, 6, 7]
.baz().quxxe(a, b, c).bar()
let abc = try await foo.baz().quxxe(a, b, c)
.bar[0]
let abc =
try await foo
.baz().quxxe(a, b, c).bar[0]
let abc =
try await foo
.baz().quxxe(a, b, c).bar[0]
let abc =
try await
thisIsASuperblyExtremelyVeryLongFunctionName()
"""
assertPrettyPrintEqual(input: input, expected: expected, linelength: 46)
}
func testBasicUnsafe() {
// NOTE: Even though the third line will be overlong, it cannot be broken after `unsafe`
// because the result would fail to parse.
let input =
"""
let a = unsafe unsafeFunction()
let b = unsafe longerUnsafeFunction()
let c = unsafe evenLongerAndLongerUnsafeFunction()
"""
let expected =
"""
let a = unsafe unsafeFunction()
let b =
unsafe longerUnsafeFunction()
let c =
unsafe evenLongerAndLongerUnsafeFunction()
"""
assertPrettyPrintEqual(input: input, expected: expected, linelength: 32)
}
func testMultipleModifierBreaking() {
assertPrettyPrintEqual(
input: """
let a = unsafe try await
modifiedFunction()
let b = unsafe try await
longerModifiedFunction()
let c = unsafe try await
evenLongerAndLongerModifiedFunction(arg: 1)
""",
expected: """
let a =
unsafe try await modifiedFunction()
let b =
unsafe try await
longerModifiedFunction()
let c =
unsafe try await
evenLongerAndLongerModifiedFunction(
arg: 1)
""",
linelength: 35
)
assertPrettyPrintEqual(
input: """
let a = unsafe try await smol()
""",
expected: """
let a =
unsafe try
await smol()
""",
linelength: 13
)
assertPrettyPrintEqual(
input: """
let a = unsafe try await smol()
""",
expected: """
let a =
unsafe try
await
smol()
""",
linelength: 10
)
}
}
|
