Intention to replace add/addAll on a mutable collection with += (#1143)

idea/testData/intentions/replaceAddWithPlusAssign/.intention

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.intentions.ReplaceAddWithPlusAssignIntention

idea/testData/intentions/replaceAddWithPlusAssign/add.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: Replace 'add()' with '+='
+fun foo() {
+    val a = arrayListOf<Int>(1, 2, 3)
+    a.<caret>add(4)
+}

idea/testData/intentions/replaceAddWithPlusAssign/add.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: Replace 'add()' with '+='
+fun foo() {
+    val a = arrayListOf<Int>(1, 2, 3)
+    a += 4
+}

idea/testData/intentions/replaceAddWithPlusAssign/addAll.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: Replace 'addAll()' with '+='
+fun foo() {
+    val a = arrayListOf<Int>(1, 2, 3)
+    a.<caret>addAll(arrayOf(4, 5, 6))
+}

idea/testData/intentions/replaceAddWithPlusAssign/addAll.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: Replace 'addAll()' with '+='
+fun foo() {
+    val a = arrayListOf<Int>(1, 2, 3)
+    a += arrayOf(4, 5, 6)
+}

idea/testData/intentions/replaceAddWithPlusAssign/addAllAtIndex.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+
+fun foo() {
+    val a = arrayListOf<Int>(1, 2, 3)
+    a.<caret>addAll(1, arrayListOf(4))
+}

idea/testData/intentions/replaceAddWithPlusAssign/addAllToVar.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+
+fun foo() {
+    var a = arrayListOf<Int>(1, 2, 3)
+    a.<caret>addAll(arrayListOf(4))
+}

idea/testData/intentions/replaceAddWithPlusAssign/addAtIndex.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+
+fun foo() {
+    val a = arrayListOf<Int>(1, 2, 3)
+    a.<caret>add(1, 4)
+}

idea/testData/intentions/replaceAddWithPlusAssign/addToVar.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+
+fun foo() {
+    var a = arrayListOf<Int>(1, 2, 3)
+    a.<caret>add(4)
+}

idea/testData/intentions/replaceAddWithPlusAssign/nonCollection.kt

@@ -0,0 +1,10 @@
+// IS_APPLICABLE: false
+
+class A {
+    fun add(x: Int) {
+    }
+}
+
+fun foo() {
+    A().<caret>add(1)
+}