SimplifiableCallChainInspection: replace .sorted().firstOrNull() with .min()

#KT-30725 Fixed

Author: t-kameyama

idea/src/org/jetbrains/kotlin/idea/inspections/collections/SimplifiableCallChainInspection.kt

@@ -72,6 +72,14 @@ class SimplifiableCallChainInspection : AbstractCallChainChecker() {
             Conversion("kotlin.collections.filter", "kotlin.collections.singleOrNull", "singleOrNull"),
             Conversion("kotlin.collections.filter", "kotlin.collections.isNotEmpty", "any"),
             Conversion("kotlin.collections.filter", "kotlin.collections.List.isEmpty", "none"),
+            Conversion("kotlin.collections.sorted", "kotlin.collections.firstOrNull", "min"),
+            Conversion("kotlin.collections.sorted", "kotlin.collections.lastOrNull", "max"),
+            Conversion("kotlin.collections.sortedDescending", "kotlin.collections.firstOrNull", "max"),
+            Conversion("kotlin.collections.sortedDescending", "kotlin.collections.lastOrNull", "min"),
+            Conversion("kotlin.collections.sortedBy", "kotlin.collections.firstOrNull", "minBy"),
+            Conversion("kotlin.collections.sortedBy", "kotlin.collections.lastOrNull", "maxBy"),
+            Conversion("kotlin.collections.sortedByDescending", "kotlin.collections.firstOrNull", "maxBy"),
+            Conversion("kotlin.collections.sortedByDescending", "kotlin.collections.lastOrNull", "minBy"),
 
             Conversion("kotlin.text.filter", "kotlin.text.first", "first"),
             Conversion("kotlin.text.filter", "kotlin.text.firstOrNull", "firstOrNull"),

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf("a" to 1, ,"c" to 3, "b" to 2).<caret>sortedByDescending { it.second }.firstOrNull()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf("a" to 1, ,"c" to 3, "b" to 2).maxBy { it.second }

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf("a" to 1, ,"c" to 3, "b" to 2).<caret>sortedByDescending { it.second }.lastOrNull()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf("a" to 1, ,"c" to 3, "b" to 2).minBy { it.second }

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf("a" to 1, ,"c" to 3, "b" to 2).<caret>sortedBy { it.second }.firstOrNull()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf("a" to 1, ,"c" to 3, "b" to 2).minBy { it.second }

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf("a" to 1, ,"c" to 3, "b" to 2).<caret>sortedBy { it.second }.lastOrNull()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf("a" to 1, ,"c" to 3, "b" to 2).maxBy { it.second }

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf(1, 3, 2).<caret>sortedDescending().firstOrNull()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf(1, 3, 2).max()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf(1, 3, 2).<caret>sortedDescending().lastOrNull()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf(1, 3, 2).min()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf(1, 3, 2).<caret>sorted().firstOrNull()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf(1, 3, 2).min()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf(1, 3, 2).<caret>sorted().lastOrNull()

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

@@ -0,0 +1,2 @@
+// WITH_RUNTIME
+val x = listOf(1, 3, 2).max()