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WrappingRuleTest.kt
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WrappingRuleTest.kt
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package com.pinterest.ktlint.ruleset.standard
import com.pinterest.ktlint.core.api.DefaultEditorConfigProperties
import com.pinterest.ktlint.test.KtLintAssertThat.Companion.assertThatRule
import com.pinterest.ktlint.test.LintViolation
import org.ec4j.core.model.PropertyType.IndentStyleValue.tab
import org.junit.jupiter.api.Test
internal class WrappingRuleTest {
private val wrappingRuleAssertThat = assertThatRule { WrappingRule() }
@Test
fun `Given a multiline string containing a string-template as parameter value but then wrap the value to a start and end on separate lines`() {
// Interpret "$." in code samples below as "$". It is used here as otherwise the indentation in the code sample
// is disapproved when running ktlint on the unit tests during the build process (not that the indent rule can
// not be disabled for a block).
val code =
"""
fun foo() {
println("$.{
true
}")
}
""".trimIndent()
.replacePlaceholderWithStringTemplate()
val formattedCode =
"""
fun foo() {
println(
"$.{
true
}"
)
}
""".trimIndent()
.replacePlaceholderWithStringTemplate()
wrappingRuleAssertThat(code)
.addAdditionalRuleProvider { IndentationRule() }
.hasLintViolations(
LintViolation(2, 13, "Missing newline after \"(\""),
LintViolation(4, 6, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `Given a multiline raw string literal then wrap and indent conditionally`() {
val code =
"""
fun foo() {
println(${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE})
println(${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimIndent())
println(${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimMargin())
}
""".trimIndent()
val formattedCode =
"""
fun foo() {
println(
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
)
println(
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimIndent()
)
println(
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimMargin()
)
}
""".trimIndent()
wrappingRuleAssertThat(code)
.addAdditionalRuleProvider { IndentationRule() }
.hasLintViolations(
LintViolation(2, 13, "Missing newline after \"(\""),
LintViolation(3, 7, "Missing newline before \")\""),
LintViolation(4, 13, "Missing newline after \"(\""),
LintViolation(5, 20, "Missing newline before \")\""),
LintViolation(6, 13, "Missing newline after \"(\""),
LintViolation(7, 20, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `Given some multiline raw string literal contain multiline string templates`() {
val code =
"""
fun foo1() {
foo2(${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}$.{
true
}
text
_$.{
true
}${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimIndent(), ${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}text${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE})
}
""".trimIndent()
.replacePlaceholderWithStringTemplate()
val formattedCode =
"""
fun foo1() {
foo2(
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}$.{
true
}
text
_$.{
true
}
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimIndent(),
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}text${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
)
}
""".trimIndent()
.replacePlaceholderWithStringTemplate()
wrappingRuleAssertThat(code)
.addAdditionalRuleProvider { IndentationRule() }
.hasLintViolations(
LintViolation(2, 10, "Missing newline after \"(\""),
LintViolation(8, 6, "Missing newline before \"\"\""),
LintViolation(8, 23, "Missing newline after \",\""),
LintViolation(8, 33, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `Given a multiline raw string literal as function call parameter but not starting and ending on a separate line`() {
val code =
"""
fun foo() {
println(${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
text
text
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimIndent().toByteArray())
}
""".trimIndent()
val formattedCode =
"""
fun foo() {
println(
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
text
text
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimIndent().toByteArray()
)
}
""".trimIndent()
wrappingRuleAssertThat(code)
.addAdditionalRuleProvider { IndentationRule() }
.hasLintViolations(
LintViolation(2, 9, "Missing newline after \"(\""),
LintViolation(6, 30, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `Given a multiline raw string literal as non-first function call parameter`() {
val code =
"""
fun foo() {
write(fs.getPath("/projects/.editorconfig"), ${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
root = true
[*]
end_of_line = lf
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimIndent().toByteArray())
}
""".trimIndent()
val formattedCode =
"""
fun foo() {
write(
fs.getPath("/projects/.editorconfig"),
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}
root = true
[*]
end_of_line = lf
${com.pinterest.ktlint.test.MULTILINE_STRING_QUOTE}.trimIndent().toByteArray()
)
}
""".trimIndent()
wrappingRuleAssertThat(code)
.addAdditionalRuleProvider { IndentationRule() }
.hasLintViolations(
LintViolation(2, 11, "Missing newline after \"(\""),
LintViolation(2, 49, "Missing newline after \",\""),
LintViolation(6, 34, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `Given some parameter lists`() {
val code =
"""
class C (val a: Int, val b: Int, val e: (
r: Int
) -> Unit, val c: Int, val d: Int) {
fun f(a: Int, b: Int, e: (
r: Int
) -> Unit, c: Int, d: Int) {}
}
""".trimIndent()
val formattedCode =
"""
class C (
val a: Int, val b: Int,
val e: (
r: Int
) -> Unit,
val c: Int, val d: Int
) {
fun f(
a: Int, b: Int,
e: (
r: Int
) -> Unit,
c: Int, d: Int
) {}
}
""".trimIndent()
wrappingRuleAssertThat(code)
.addAdditionalRuleProvider { IndentationRule() }
.hasLintViolations(
LintViolation(1, 10, "Missing newline after \"(\""),
LintViolation(1, 33, "Missing newline after \",\""),
LintViolation(3, 11, "Missing newline after \",\""),
LintViolation(3, 33, "Missing newline before \")\""),
LintViolation(4, 7, "Missing newline after \"(\""),
LintViolation(4, 22, "Missing newline after \",\""),
LintViolation(6, 11, "Missing newline after \",\""),
LintViolation(6, 25, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `Given a function call`() {
val code =
"""
fun main() {
f(a, b, {
// body
}, c, d)
fn(a,
b,
c)
}
""".trimIndent()
val formattedCode =
"""
fun main() {
f(a, b, {
// body
}, c, d)
fn(
a,
b,
c
)
}
""".trimIndent()
wrappingRuleAssertThat(code)
.addAdditionalRuleProvider { IndentationRule() }
.hasLintViolations(
LintViolation(6, 8, "Missing newline after \"(\""),
LintViolation(8, 8, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test // "https://github.com/shyiko/ktlint/issues/180"
fun testLintWhereClause() {
val code =
"""
class BiAdapter<C : RecyclerView.ViewHolder, V1 : C, V2 : C, out A1, out A2>(
val adapter1: A1,
val adapter2: A2
) : RecyclerView.Adapter<C>()
where A1 : RecyclerView.Adapter<V1>, A1 : ComposableAdapter.ViewTypeProvider,
A2 : RecyclerView.Adapter<V2>, A2 : ComposableAdapter.ViewTypeProvider {
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test // "https://github.com/pinterest/ktlint/issues/433"
fun testLintParameterListWithComments() {
val code =
"""
fun main() {
foo(
/*param1=*/param1,
/*param2=*/param2
)
foo(
/*param1=*/ param1,
/*param2=*/ param2
)
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `test wrapping rule allows line comment`() {
val code =
"""
interface Foo1 {}
interface Foo2 {}
interface Foo3 {}
class Bar :
Foo1, // this comment should be legal
Foo2,// this comment should be legal
Foo3 {
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `test wrapping rule allows block comment`() {
val code =
"""
interface Foo1 {}
interface Foo2 {}
interface Foo3 {}
class Bar :
Foo1, /* this comment should be legal */
Foo2,/* this comment should be legal */
Foo3 {
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun testLintNewlineAfterEqAllowed() {
// Previously the IndentationRule would force the line break after the `=`. Verify that it is
// still allowed.
val code =
"""
private fun getImplementationVersion() =
javaClass.`package`.implementationVersion
?: javaClass.getResourceAsStream("/META-INF/MANIFEST.MF")
?.let { stream ->
Manifest(stream).mainAttributes.getValue("Implementation-Version")
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint indentation new line before return type`() {
val code =
"""
abstract fun doPerformSomeOperation(param: ALongParameter):
SomeLongInterface<ALongParameter.InnerClass, SomeOtherClass>
val s:
String = ""
fun process(
fileName:
String
): List<Output>
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint trailing comment in multiline parameter is allowed`() {
val code =
"""
fun foo(param: Foo, other: String) {
foo(
param = param
.copy(foo = ""), // A comment
other = ""
)
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `format trailing comment in multiline parameter is allowed`() {
val code =
"""
fun foo(param: Foo, other: String) {
foo(
param = param
.copy(foo = ""), // A comment
other = ""
)
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint safe-called wrapped trailing lambda is allowed`() {
val code =
"""
val foo = bar
?.filter { number ->
number == 0
}?.map { evenNumber ->
evenNumber * evenNumber
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `format safe-called wrapped trailing lambda is allowed`() {
val code =
"""
val foo = bar
?.filter { number ->
number == 0
}?.map { evenNumber ->
evenNumber * evenNumber
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint block started with parens after if is allowed`() {
val code =
"""
fun test() {
if (true)
(1).toString()
else
2.toString()
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `format block started with parens after if is allowed`() {
val code =
"""
fun test() {
if (true)
(1).toString()
else
2.toString()
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
// https://github.com/pinterest/ktlint/issues/796
@Test
fun `lint if-condition with multiline call expression is indented properly`() {
val code =
"""
private val gpsRegion =
if (permissionHandler.isPermissionGranted(
context, Manifest.permission.ACCESS_FINE_LOCATION
)
) {
// stuff
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `format if-condition with multiline call expression is indented properly`() {
val code =
"""
private val gpsRegion =
if (permissionHandler.isPermissionGranted(
context, Manifest.permission.ACCESS_FINE_LOCATION
)
) {
// stuff
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `format new line before opening quotes multiline string as parameter`() {
val code =
"""
fun foo() {
println($MULTILINE_STRING_QUOTE
line1
line2
$MULTILINE_STRING_QUOTE.trimIndent())
}
""".trimIndent()
val formattedCode =
"""
fun foo() {
println(
$MULTILINE_STRING_QUOTE
line1
line2
$MULTILINE_STRING_QUOTE.trimIndent()
)
}
""".trimIndent()
wrappingRuleAssertThat(code)
.hasLintViolations(
LintViolation(2, 13, "Missing newline after \"(\""),
LintViolation(5, 24, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
@Suppress("RemoveCurlyBracesFromTemplate")
fun `format new line before opening quotes multiline string as parameter with tab spacing`() {
val code =
"""
fun foo() {
${TAB}println($MULTILINE_STRING_QUOTE
${TAB}${TAB}line1
${TAB}${TAB} line2
${TAB}${TAB}$MULTILINE_STRING_QUOTE.trimIndent())
}
""".trimIndent()
val formattedCode =
"""
fun foo() {
${TAB}println(
${TAB}${TAB}$MULTILINE_STRING_QUOTE
${TAB}${TAB}line1
${TAB}${TAB} line2
${TAB}${TAB}$MULTILINE_STRING_QUOTE.trimIndent()
${TAB})
}
""".trimIndent()
wrappingRuleAssertThat(code)
.withEditorConfigOverride(DefaultEditorConfigProperties.indentStyleProperty to tab)
.hasLintViolations(
LintViolation(2, 10, "Missing newline after \"(\""),
LintViolation(5, 18, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `format multiline string containing quotation marks`() {
val code =
"""
fun foo() {
println($MULTILINE_STRING_QUOTE
text ""
text
""
$MULTILINE_STRING_QUOTE.trimIndent())
}
""".trimIndent()
val formattedCode =
"""
fun foo() {
println(
$MULTILINE_STRING_QUOTE
text ""
text
""
$MULTILINE_STRING_QUOTE.trimIndent()
)
}
""".trimIndent()
wrappingRuleAssertThat(code)
.hasLintViolations(
LintViolation(2, 13, "Missing newline after \"(\""),
LintViolation(7, 24, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `format multiline string containing a template string as the first non blank element on the line`() {
// Escape '${true}' as '${"$"}{true}' to prevent evaluation before actually processing the multiline sting
val code =
"""
fun foo() {
println($MULTILINE_STRING_QUOTE
${"$"}{true}
${"$"}{true}
$MULTILINE_STRING_QUOTE.trimIndent())
}
""".trimIndent()
val formattedCode =
"""
fun foo() {
println(
$MULTILINE_STRING_QUOTE
${"$"}{true}
${"$"}{true}
$MULTILINE_STRING_QUOTE.trimIndent()
)
}
""".trimIndent()
wrappingRuleAssertThat(code)
.hasLintViolations(
LintViolation(2, 13, "Missing newline after \"(\""),
LintViolation(6, 24, "Missing newline before \")\"")
).isFormattedAs(formattedCode)
}
@Test
fun `issue 575 - format multiline string with tabs after the margin is indented properly`() {
val code =
"""
val str =
$MULTILINE_STRING_QUOTE
${TAB}Tab at the beginning of this line but after the indentation margin
Tab${TAB}in the middle of this string
Tab at the end of this line.$TAB
$MULTILINE_STRING_QUOTE.trimIndent()
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint if-condition with line break and multiline call expression is indented properly`() {
val code =
"""
// https://github.com/pinterest/ktlint/issues/871
fun function(param1: Int, param2: Int, param3: Int?): Boolean {
return if (
listOf(
param1,
param2,
param3
).none { it != null }
) {
true
} else {
false
}
}
// https://github.com/pinterest/ktlint/issues/900
enum class Letter(val value: String) {
A("a"),
B("b");
}
fun broken(key: String): Letter {
for (letter in Letter.values()) {
if (
letter.value
.equals(
key,
ignoreCase = true
)
) {
return letter
}
}
return Letter.B
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint property delegate is indented properly`() {
val code =
"""
val i: Int
by lazy { 1 }
val j = 0
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint property delegate is indented properly 2`() {
val code =
"""
val i: Int
by lazy {
"".let {
println(it)
}
1
}
val j = 0
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint property delegate is indented properly 3`() {
val code =
"""
val i: Int by lazy {
"".let {
println(it)
}
1
}
val j = 0
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint property delegate is indented properly 4`() {
val code =
"""
fun lazyList() = lazy { mutableListOf<String>() }
class Test {
val list: List<String>
by lazyList()
val aVar = 0
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint property delegate is indented properly 5`() {
val code =
"""
fun lazyList(a: Int, b: Int) = lazy { mutableListOf<String>() }
class Test {
val list: List<String>
by lazyList(
1,
2
)
val aVar = 0
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
// https://github.com/pinterest/ktlint/issues/1210
@Test
fun `lint delegated properties with a lambda argument`() {
val code =
"""
import kotlin.properties.Delegates
class Test {
private var test
by Delegates.vetoable("") { _, old, new ->
true
}
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint delegation 1`() {
val code =
"""
interface Foo
class Bar(a: Int, b: Int, c: Int) : Foo
class Test1 : Foo by Bar(
a = 1,
b = 2,
c = 3
)
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint and format delegation 2`() {
val code =
"""
class Test2 : Foo
by Bar(
a = 1,
b = 2,
c = 3
)
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint delegation 3`() {
val code =
"""
interface Foo
class Bar(a: Int, b: Int, c: Int) : Foo
class Test3 :
Foo by Bar(
a = 1,
b = 2,
c = 3
)
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint delegation 4`() {
val code =
"""
interface Foo
class Bar(a: Int, b: Int, c: Int) : Foo
class Test4 :
Foo
by Bar(
a = 1,
b = 2,
c = 3
)
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint delegation 5`() {
val code =
"""
interface Foo
class Bar(a: Int, b: Int, c: Int) : Foo
class Test5 {
companion object : Foo by Bar(
a = 1,
b = 2,
c = 3
)
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint delegation 6`() {
val code =
"""
data class Shortcut(val id: String, val url: String)
object Someclass : List<Shortcut> by listOf(
Shortcut(
id = "1",
url = "url"
),
Shortcut(
id = "2",
url = "asd"
),
Shortcut(
id = "3",
url = "TV"
)
)
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint named argument`() {
val code =
"""
data class D(val a: Int, val b: Int, val c: Int)
fun test() {
val d = D(
a = 1,
b =
2,
c = 3
)
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint default parameter`() {
val code =
"""
data class D(
val a: Int = 1,
val b: Int =
2,
val c: Int = 3
)
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
// https://github.com/pinterest/ktlint/issues/959
@Test
fun `lint conditions with multi-line call expressions indented properly`() {
val code =
"""
fun test() {
val result = true &&
minOf(
1, 2
) == 2
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
// https://github.com/pinterest/ktlint/issues/1003
@Test
fun `lint multiple interfaces`() {
val code =
"""
abstract class Parent(a: Int, b: Int)
interface Parent2
class Child(
a: Int,
b: Int
) : Parent(
a,
b
),
Parent2
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
// https://github.com/pinterest/ktlint/issues/918
@Test
fun `lint newline after type reference in functions`() {
val code =
"""
override fun actionProcessor():
ObservableTransformer<in SomeVeryVeryLongNameOverHereAction, out SomeVeryVeryLongNameOverHereResult> =
ObservableTransformer { actions ->
// ...
}
fun generateGooooooooooooooooogle():
Gooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogle {
return Gooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogle()
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
// https://github.com/pinterest/ktlint/issues/764
@Test
fun `lint value argument list with lambda`() {
val code =
"""
fun test(i: Int, f: (Int) -> Unit) {
f(i)
}
fun main() {
test(1, f = {
println(it)
})
}
""".trimIndent()
wrappingRuleAssertThat(code).hasNoLintViolations()
}
@Test
fun `lint value argument list with two lambdas`() {
val code =
"""
fun test(f: () -> Unit, g: () -> Unit) {
f()
g()
}
fun main() {
test({
println(1)
}, {
println(2)
})
}
""".trimIndent()