Introduce "simplifiable call chain on collection" inspection

Related to KT-12165
So #KT-18274 Fixed
So #KT-17198 Fixed

idea/testData/inspectionsLocal/collections/simplifiableCallChain/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.collections.SimplifiableCallChainInspection

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterFirst.kt

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+
+val nullableList: List<String>? = listOf("1", "")
+val x = nullableList?.<caret>filter { it.isNotEmpty() }?.first()

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterFirst.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+
+val nullableList: List<String>? = listOf("1", "")
+val x = nullableList?.first { it.isNotEmpty() }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterFirstFake.kt

@@ -0,0 +1,4 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+val x = listOf("1", "").<caret>filter { it.isNotEmpty() }.first { it[0] == 'A' }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterFirstFakeReference.kt

@@ -0,0 +1,4 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+val x = listOf('1', 'a', 0.toChar()).<caret>filter { it.toInt() != 0 }.first(Char::isLetter)

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterFirstOrNullReference.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf("1", "").<caret>filter(String::isNotEmpty).firstOrNull()

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterFirstOrNullReference.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf("1", "").firstOrNull(String::isNotEmpty)

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterIsEmpty.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).filter <caret>{ it % 2 != 0 }.isEmpty()

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterIsEmpty.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).none { it % 2 != 0 }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterIsNotEmpty.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).filter <caret>{ it % 2 != 0 }.isNotEmpty()

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterIsNotEmpty.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).any { it % 2 != 0 }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterLastExplicit.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf("1", "").filter <caret>{ element -> element.isNotEmpty() }.last()

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterLastExplicit.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf("1", "").last { element -> element.isNotEmpty() }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterTextIsEmpty.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = "abcdef".fil<caret>ter { it.isDigit() }.isEmpty()

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterTextIsEmpty.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = "abcdef".none { it.isDigit() }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterTextSingleOrNull.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = "5abc".filter { it.isDigit() }.<caret>singleOrNull()

idea/testData/inspectionsLocal/collections/simplifiableCallChain/filterTextSingleOrNull.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = "5abc".singleOrNull { it.isDigit() }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinTo.kt

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+
+val sb = StringBuilder()
+val x = listOf(1, 2, 3).map { "$it*$it" }.<caret>joinTo(buffer = sb, prefix = "= ", separator = " + ")

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinTo.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+
+val sb = StringBuilder()
+val x = listOf(1, 2, 3).joinTo(buffer = sb, prefix = "= ", separator = " + ") { "$it*$it" }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinToFake.kt

@@ -0,0 +1,5 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+val sb = StringBuilder()
+val x = listOf(1, 2, 3).map { "$it*$it" }.<caret>joinTo(buffer = sb, prefix = "= ", separator = " + ", transform = String::capitalize)

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinToFakeWithLambda.kt

@@ -0,0 +1,5 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+val sb = StringBuilder()
+val x = listOf(1, 2, 3).map { "$it*$it" }.<caret>joinTo(buffer = sb, prefix = "= ", separator = " + ") { "${it.substring(1)}"}

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinToString.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).map { "$it*$it" }.<caret>joinToString(prefix = "= ", separator = " + ")

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinToString.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).joinToString(prefix = "= ", separator = " + ") { "$it*$it" }

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinToStringWithReference.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).map(Int::toString).<caret>joinToString(prefix = "= ", separator = " + ")

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinToStringWithReference.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).joinToString(prefix = "= ", separator = " + ", transform = Int::toString)

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinToStringWithReferenceFake.kt

@@ -0,0 +1,4 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+val x = listOf(1, 2, 3).map(Int::toDouble).<caret>joinToString(prefix = "= ", separator = " + ")

idea/testData/inspectionsLocal/collections/simplifiableCallChain/mapNotNull.kt

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 0, 2).map { if (it != 0) it else null }.<caret>filterNotNull()

idea/testData/inspectionsLocal/collections/simplifiableCallChain/mapNotNull.kt.after

@@ -0,0 +1,3 @@
+// WITH_RUNTIME
+
+val x = listOf(1, 0, 2).mapNotNull { if (it != 0) it else null }