Introduce "flatMap { it } -> flatten" inspection #KT-25969 Fixed

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/.inspection

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

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/explicitLambdaParameter.kt

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test() {
+    listOf(listOf(1)).<caret>flatMap { i -> i }
+}

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/explicitLambdaParameter.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test() {
+    listOf(listOf(1)).flatten()
+}

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/notOnlyReference.kt

@@ -0,0 +1,5 @@
+// PROBLEM: none
+// WITH_RUNTIME
+fun test() {
+    listOf(listOf(1)).flatMap<caret> { it + 1 }
+}

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/set.kt

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test() {
+    setOf(setOf(1)).<caret>flatMap { it }
+}

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/set.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test() {
+    setOf(setOf(1)).flatten()
+}

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/simple.kt

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test() {
+    listOf(listOf(1)).flatMap<caret> { it }
+}

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/simple.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test() {
+    listOf(listOf(1)).flatten()
+}

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/simple2.kt

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test() {
+    listOf(listOf(1)).flatMap<caret>({ it })
+}

idea/testData/inspectionsLocal/collections/convertFlatMapToFlatten/simple2.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test() {
+    listOf(listOf(1)).flatten()
+}