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IndentationRuleTest.kt
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IndentationRuleTest.kt
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package com.pinterest.ktlint.ruleset.standard
import com.pinterest.ktlint.core.LintError
import com.pinterest.ktlint.test.diffFileFormat
import com.pinterest.ktlint.test.diffFileLint
import com.pinterest.ktlint.test.format
import com.pinterest.ktlint.test.lint
import org.assertj.core.api.Assertions.assertThat
import org.junit.Test
internal class IndentationRuleTest {
@Test
fun testLint() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint.kt.spec")).isEmpty()
}
@Test
fun `format unindented input`() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format.kt.spec",
"spec/indent/format-expected.kt.spec"
)
).isEmpty()
}
@Test
fun `format unindented input with tabs`() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format.kt.spec",
"spec/indent/format-expected-tabs.kt.spec",
INDENT_STYLE_TABS
)
).isEmpty()
}
@Test
fun testLintIndentSize2() {
assertThat(
IndentationRule().lint(
"""
fun main() {
val v = ""
println(v)
}
fun main() {
val v = ""
println(v)
}
class A {
var x: String
get() = ""
set(v: String) { x = v }
}
""".trimIndent(),
mapOf("indent_size" to "2")
)
).isEqualTo(
listOf(
LintError(2, 1, "indent", "Unexpected indentation (3) (should be 2)"),
LintError(3, 1, "indent", "Unexpected indentation (4) (should be 2)")
)
)
}
@Test
fun `lint IndentTab with tabs`() {
assertThat(
IndentationRule().lint(
"""
|fun main() {
|val v = ""
| println(v)
|}
|fun main() {
| val v = ""
| println(v)
|}
|class A {
| var x: String
| get() = ""
| set(v: String) { x = v }
|}
|""".trimMargin(),
INDENT_STYLE_TABS
)
).isEqualTo(
listOf(
LintError(2, 1, "indent", "Unexpected indentation (0) (should be 1)"),
LintError(3, 1, "indent", "Unexpected indentation (2) (should be 1)")
)
)
}
@Test
fun testLintIndentSizeUnset() {
assertThat(
IndentationRule().lint(
"""
fun main() {
val v = ""
println(v)
}
""".trimIndent(),
mapOf("indent_size" to "unset")
)
).isEmpty()
}
@Test
fun testLintArgumentList() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-argument-list.kt.spec")).isEmpty()
}
@Test
fun testFormatKDoc() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-kdoc.kt.spec",
"spec/indent/format-kdoc-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testLintComment() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-comment.kt.spec")).isEmpty()
}
@Test
fun testLintCondition() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-condition.kt.spec")).isEmpty()
}
@Test
fun testLintPropertyAccessor() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-property-accessor.kt.spec")).isEmpty()
}
@Test
fun testFormatPropertyAccessor() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-property-accessor.kt.spec",
"spec/indent/format-property-accessor-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testFormatRawStringTrimIndent() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-raw-string-trim-indent.kt.spec",
"spec/indent/format-raw-string-trim-indent-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testLintString() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-string.kt.spec")).isEmpty()
}
@Test
fun testLintSuperType() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-supertype.kt.spec")).isEmpty()
}
@Test
fun testFormatSuperType() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-supertype.kt.spec",
"spec/indent/format-supertype-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testLintFirstLine() {
assertThat(IndentationRule().lint(" // comment"))
.isEqualTo(
listOf(
LintError(line = 1, col = 1, ruleId = "indent", detail = "Unexpected indentation (2) (should be 0)"),
)
)
assertThat(IndentationRule().lint(" // comment", script = true))
.isEqualTo(
listOf(
LintError(line = 1, col = 1, ruleId = "indent", detail = "Unexpected indentation (2) (should be 0)"),
)
)
assertThat(IndentationRule().lint(" \n // comment"))
.isEqualTo(
listOf(
LintError(line = 2, col = 1, ruleId = "indent", detail = "Unexpected indentation (2) (should be 0)"),
)
)
assertThat(IndentationRule().lint(" \n // comment", script = true))
.isEqualTo(
listOf(
LintError(line = 2, col = 1, ruleId = "indent", detail = "Unexpected indentation (2) (should be 0)"),
)
)
}
@Test
fun testLintBinaryExpression() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-binary-expression.kt.spec")).isEmpty()
}
@Test
fun testFormatBinaryExpression() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-binary-expression.kt.spec",
"spec/indent/format-binary-expression-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testLintWhenExpression() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-when-expression.kt.spec")).isEmpty()
}
@Test
fun testLintControlBody() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-control-body.kt.spec")).isEmpty()
}
@Test
fun testLintDotQualifiedExpression() {
assertThat(IndentationRule().diffFileLint("spec/indent/lint-dot-qualified-expression.kt.spec")).isEmpty()
}
@Test
fun testFormatDotQualifiedExpression() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-dot-qualified-expression.kt.spec",
"spec/indent/format-dot-qualified-expression-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testFormatMultilineString() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-multiline-string.kt.spec",
"spec/indent/format-multiline-string-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testFormatArrow() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-arrow.kt.spec",
"spec/indent/format-arrow-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testFormatEq() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-eq.kt.spec",
"spec/indent/format-eq-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testFormatParameterList() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-parameter-list.kt.spec",
"spec/indent/format-parameter-list-expected.kt.spec"
)
).isEmpty()
}
@Test
fun testFormatArgumentList() {
assertThat(
IndentationRule().diffFileFormat(
"spec/indent/format-argument-list.kt.spec",
"spec/indent/format-argument-list-expected.kt.spec"
)
).isEmpty()
}
@Test // "https://github.com/shyiko/ktlint/issues/180"
fun testLintWhereClause() {
assertThat(
IndentationRule().lint(
"""
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()
)
).isEmpty()
}
@Test // "https://github.com/pinterest/ktlint/issues/433"
fun testLintParameterListWithComments() {
assertThat(
IndentationRule().lint(
"""
fun main() {
foo(
/*param1=*/param1,
/*param2=*/param2
)
foo(
/*param1=*/ param1,
/*param2=*/ param2
)
}
""".trimIndent()
)
).isEmpty()
}
@Test
fun testUnexpectedSpaceCharacter() {
val ktScript = "fun main() {\n return 0\n }"
assertThat(IndentationRule().lint(ktScript, mapOf("indent_style" to "tab"))).isEqualTo(
listOf(
LintError(line = 2, col = 1, ruleId = "indent", detail = "Unexpected space character(s)"),
LintError(line = 3, col = 1, ruleId = "indent", detail = "Unexpected space character(s)")
)
)
assertThat(IndentationRule().format(ktScript))
.isEqualTo("fun main() {\n return 0\n}")
}
@Test
fun testUnexpectedTabCharacter() {
val ktScript = "fun main() {\n\t\treturn 0\n\t}"
assertThat(IndentationRule().lint(ktScript)).isEqualTo(
listOf(
LintError(line = 2, col = 1, ruleId = "indent", detail = "Unexpected tab character(s)"),
LintError(line = 2, col = 1, ruleId = "indent", detail = "Unexpected indentation (8) (should be 4)"),
LintError(line = 3, col = 1, ruleId = "indent", detail = "Unexpected tab character(s)"),
LintError(line = 3, col = 1, ruleId = "indent", detail = "Unexpected indentation (4) (should be 0)")
)
)
assertThat(IndentationRule().format(ktScript))
.isEqualTo("fun main() {\n return 0\n}")
}
@Test
fun testUnexpectedTabCharacterForLinesAtCorrectIndentationLevel() {
val ktScript = "" +
"class Foo {\n" +
"\tfun doBar() {\n" +
"\t\t\tprintln(\"test\")\n" +
"\t}\n" +
"}\n"
assertThat(IndentationRule().lint(ktScript)).isEqualTo(
listOf(
LintError(line = 2, col = 1, ruleId = "indent", detail = "Unexpected tab character(s)"),
LintError(line = 3, col = 1, ruleId = "indent", detail = "Unexpected tab character(s)"),
LintError(line = 3, col = 1, ruleId = "indent", detail = "Unexpected indentation (12) (should be 8)"),
LintError(line = 4, col = 1, ruleId = "indent", detail = "Unexpected tab character(s)")
)
)
assertThat(IndentationRule().format(ktScript))
.isEqualTo(
"class Foo {\n" +
" fun doBar() {\n" +
" println(\"test\")\n" +
" }\n" +
"}\n"
)
}
@Test
fun testUnexpectedTabCharacterWithCustomIndentSize() {
val ktScript = "fun main() {\n\t\treturn 0\n\t}"
assertThat(IndentationRule().lint(ktScript, mapOf("indent_size" to "2"))).isEqualTo(
listOf(
LintError(line = 2, col = 1, ruleId = "indent", detail = "Unexpected tab character(s)"),
LintError(line = 2, col = 1, ruleId = "indent", detail = "Unexpected indentation (4) (should be 2)"),
LintError(line = 3, col = 1, ruleId = "indent", detail = "Unexpected tab character(s)"),
LintError(line = 3, col = 1, ruleId = "indent", detail = "Unexpected indentation (2) (should be 0)")
)
)
assertThat(IndentationRule().format(ktScript, mapOf("indent_size" to "2")))
.isEqualTo("fun main() {\n return 0\n}")
}
@Test
fun testLintNewlineAfterEqAllowed() {
assertThat(
IndentationRule().lint(
// Previously the IndentationRule would force the line break after the `=`. Verify that it is
// still allowed.
"""
private fun getImplementationVersion() =
javaClass.`package`.implementationVersion
?: javaClass.getResourceAsStream("/META-INF/MANIFEST.MF")
?.let { stream ->
Manifest(stream).mainAttributes.getValue("Implementation-Version")
}
""".trimIndent()
)
).isEmpty()
}
@Test
fun `incorrect indentation after lambda arrow`() {
assertThat(
IndentationRule().lint(
"""
fun bar() {
Pair("val1", "val2")
.let { (first, second) ->
first + second
}
}
""".trimIndent()
)
).isEqualTo(
listOf(
LintError(line = 4, col = 1, ruleId = "indent", detail = "Unexpected indentation (16) (should be 12)"),
)
)
}
@Test
fun `lint indentation new line before return type`() {
assertThat(
IndentationRule().lint(
"""
abstract fun doPerformSomeOperation(param: ALongParameter):
SomeLongInterface<ALongParameter.InnerClass, SomeOtherClass>
val s:
String = ""
fun process(
fileName:
String
): List<Output>
""".trimIndent()
)
).isEmpty()
}
@Test
fun `format indentation new line before return type`() {
assertThat(
IndentationRule().format(
"""
abstract fun doPerformSomeOperation(param: ALongParameter):
SomeLongInterface<ALongParameter.InnerClass, SomeOtherClass>
val s:
String = ""
fun process(
fileName:
String
): List<Output>
""".trimIndent()
)
).isEqualTo(
"""
abstract fun doPerformSomeOperation(param: ALongParameter):
SomeLongInterface<ALongParameter.InnerClass, SomeOtherClass>
val s:
String = ""
fun process(
fileName:
String
): List<Output>
""".trimIndent()
)
}
@Test
fun `lint trailing comment in multiline parameter is allowed`() {
assertThat(
IndentationRule().lint(
"""
fun foo(param: Foo, other: String) {
foo(
param = param
.copy(foo = ""), // A comment
other = ""
)
}
""".trimIndent()
)
).isEmpty()
}
@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()
assertThat(IndentationRule().format(code)).isEqualTo(code)
}
@Test
fun `lint safe-called wrapped trailing lambda is allowed`() {
assertThat(
IndentationRule().lint(
"""
val foo = bar
?.filter { number ->
number == 0
}?.map { evenNumber ->
evenNumber * evenNumber
}
""".trimIndent()
)
).isEmpty()
}
@Test
fun `format safe-called wrapped trailing lambda is allowed`() {
val code =
"""
val foo = bar
?.filter { number ->
number == 0
}?.map { evenNumber ->
evenNumber * evenNumber
}
""".trimIndent()
assertThat(IndentationRule().format(code)).isEqualTo(code)
}
@Test
fun `lint block started with parens after if is allowed`() {
val code =
"""
fun test() {
if (true)
(1).toString()
else
2.toString()
}
""".trimIndent()
assertThat(IndentationRule().lint(code)).isEmpty()
}
@Test
fun `format block started with parens after if is allowed`() {
val code =
"""
fun test() {
if (true)
(1).toString()
else
2.toString()
}
""".trimIndent()
assertThat(IndentationRule().format(code)).isEqualTo(code)
}
// 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()
assertThat(IndentationRule().lint(code)).isEmpty()
}
@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()
assertThat(IndentationRule().format(code)).isEqualTo(code)
}
@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 expectedCode =
"""
fun foo() {
println(
$MULTILINE_STRING_QUOTE
line1
line2
$MULTILINE_STRING_QUOTE.trimIndent()
)
}
""".trimIndent()
@Suppress("RemoveCurlyBracesFromTemplate") val expectedCodeTabs =
"""
fun foo() {
${TAB}println(
${TAB}${TAB}$MULTILINE_STRING_QUOTE
${TAB}${TAB}line1
${TAB}${TAB} line2
${TAB}${TAB}$MULTILINE_STRING_QUOTE.trimIndent()
${TAB})
}
""".trimIndent()
assertThat(
IndentationRule().lint(code)
).isEqualTo(
listOf(
LintError(2, 13, "indent", "Missing newline after \"(\""),
LintError(5, 24, "indent", "Missing newline before \")\""),
)
)
assertThat(IndentationRule().format(code)).isEqualTo(expectedCode)
assertThat(IndentationRule().format(code, INDENT_STYLE_TABS)).isEqualTo(expectedCodeTabs)
}
@Test
fun `format multiline string assignment to variable with opening quotes on same line as declaration`() {
val code =
"""
fun foo() {
val bar = $MULTILINE_STRING_QUOTE
line1
line2
$MULTILINE_STRING_QUOTE.trimIndent()
}
""".trimIndent()
val expectedCode =
"""
fun foo() {
val bar = $MULTILINE_STRING_QUOTE
line1
line2
$MULTILINE_STRING_QUOTE.trimIndent()
}
""".trimIndent()
assertThat(
IndentationRule().lint(code)
).isEqualTo(
listOf(
LintError(5, 1, "indent", "Unexpected indent of multiline string closing quotes"),
)
)
assertThat(IndentationRule().format(code)).isEqualTo(expectedCode)
}
@Test
fun `format multiline string containing quotation marks`() {
val code =
"""
fun foo() {
println($MULTILINE_STRING_QUOTE
text ""
text
""
$MULTILINE_STRING_QUOTE.trimIndent())
}
""".trimIndent()
val expectedCode =
"""
fun foo() {
println(
$MULTILINE_STRING_QUOTE
text ""
text
""
$MULTILINE_STRING_QUOTE.trimIndent()
)
}
""".trimIndent()
assertThat(
IndentationRule().lint(code)
).isEqualTo(
listOf(
LintError(line = 2, col = 13, ruleId = "indent", detail = "Missing newline after \"(\""),
LintError(line = 7, col = 1, ruleId = "indent", detail = "Unexpected indent of multiline string closing quotes"),
LintError(line = 7, col = 20, ruleId = "indent", detail = "Missing newline before \")\""),
)
)
assertThat(IndentationRule().format(code)).isEqualTo(expectedCode)
}
@Test
fun `format multiline string containing a template string as the first non blank element on the line`() {
// Escape '${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 expectedCode =
"""
fun foo() {
println(
$MULTILINE_STRING_QUOTE
${"$"}{true}
${"$"}{true}
$MULTILINE_STRING_QUOTE.trimIndent()
)
}
""".trimIndent()
assertThat(
IndentationRule().lint(code)
).isEqualTo(
listOf(
LintError(line = 2, col = 13, ruleId = "indent", detail = "Missing newline after \"(\""),
LintError(line = 6, col = 1, ruleId = "indent", detail = "Unexpected indent of multiline string closing quotes"),
LintError(line = 6, col = 20, ruleId = "indent", detail = "Missing newline before \")\""),
)
)
assertThat(IndentationRule().format(code)).isEqualTo(expectedCode)
}
@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()
assertThat(IndentationRule().lint(code)).isEmpty()
assertThat(IndentationRule().format(code)).isEqualTo(code)
}
@Test
fun `lint if-condition with line break and multiline call expression is indented properly`() {
assertThat(
IndentationRule().lint(
"""
// 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()
)
).isEmpty()
}
@Test
fun `lint property delegate is indented properly`() {
assertThat(
IndentationRule().lint(
"""
val i: Int
by lazy { 1 }
val j = 0
""".trimIndent()
)
).isEmpty()
}
@Test
fun `lint property delegate is indented properly 2`() {
assertThat(
IndentationRule().lint(
"""
val i: Int
by lazy {
"".let {
println(it)
}
1
}
val j = 0
""".trimIndent()
)
).isEmpty()
}
@Test
fun `lint property delegate is indented properly 3`() {
assertThat(
IndentationRule().lint(
"""
val i: Int by lazy {
"".let {
println(it)
}
1
}
val j = 0
""".trimIndent()
)
).isEmpty()
}
@Test
fun `lint property delegate is indented properly 4`() {
assertThat(
IndentationRule().lint(
"""
fun lazyList() = lazy { mutableListOf<String>() }
class Test {
val list: List<String>
by lazyList()
val aVar = 0
}
""".trimIndent()
)
).isEmpty()
}
@Test
fun `lint property delegate is indented properly 5`() {
assertThat(
IndentationRule().lint(
"""
fun lazyList(a: Int, b: Int) = lazy { mutableListOf<String>() }
class Test {
val list: List<String>
by lazyList(
1,
2
)
val aVar = 0
}
""".trimIndent()
)
).isEmpty()
}
// https://github.com/pinterest/ktlint/issues/1210
@Test
fun `lint delegated properties with a lambda argument`() {
assertThat(
IndentationRule().lint(
"""
import kotlin.properties.Delegates
class Test {
private var test
by Delegates.vetoable("") { _, old, new ->
true
}
}
""".trimIndent()
)
).isEmpty()
}
@Test
fun `lint delegation 1`() {
assertThat(
IndentationRule().lint(
"""
interface Foo
class Bar(a: Int, b: Int, c: Int) : Foo
class Test1 : Foo by Bar(
a = 1,
b = 2,
c = 3
)
""".trimIndent()
)
).isEmpty()
}
@Test
fun `lint and format delegation 2`() {
val code =
"""
class Test2 : Foo
by Bar(
a = 1,
b = 2,
c = 3
)
""".trimIndent()
assertThat(IndentationRule().format(code)).isEqualTo(code)
assertThat(IndentationRule().lint(code)).isEmpty()
}
@Test
fun `lint delegation 3`() {
assertThat(
IndentationRule().lint(
"""
interface Foo
class Bar(a: Int, b: Int, c: Int) : Foo
class Test3 :
Foo by Bar(
a = 1,
b = 2,
c = 3
)
""".trimIndent()
)
).isEmpty()
}
@Test
fun `lint delegation 4`() {
assertThat(
IndentationRule().lint(
"""
interface Foo
class Bar(a: Int, b: Int, c: Int) : Foo
class Test4 :
Foo
by Bar(