"if-then to safe access" inspection: support call expression -> let

#KT-7675 Fixed

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/call.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun convert(x: String, y: String) = ""
+
+fun foo(a: String?, b: String) {
+    <caret>if (a != null) convert(a, b) else null
+}

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/call.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun convert(x: String, y: String) = ""
+
+fun foo(a: String?, b: String) {
+    a?.let { convert(it, b) }
+}

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/call2.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun convert(x: String, y: String) = ""
+
+fun foo(a: Any?, b: String) {
+    <caret>if (a is String) convert(a, b) else null
+}

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/call2.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun convert(x: String, y: String) = ""
+
+fun foo(a: Any?, b: String) {
+    (a as? String)?.let { convert(it, b) }
+}

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/call3.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun convert(x: String, y: Int) = ""
+
+fun foo(a: String?, it: Int) {
+    <caret>if (a != null) convert(a, it) else null
+}

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/call3.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun convert(x: String, y: Int) = ""
+
+fun foo(a: String?, it: Int) {
+    a?.let { it1 -> convert(it1, it) }
+}

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/call4.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+fun maybeFoo(): String? {
+    return "foo"
+}
+
+fun convert(x: String, y: Int) = ""
+
+fun foo(it: Int) {
+    val foo = maybeFoo()
+    <caret>if (foo == null) else convert(foo, it)
+}
+

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/call4.kt.after

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+fun maybeFoo(): String? {
+    return "foo"
+}
+
+fun convert(x: String, y: Int) = ""
+
+fun foo(it: Int) {
+    maybeFoo()?.let { it1 -> convert(it1, it) }
+}
+
+

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/inspectionData/expected.xml

@@ -167,4 +167,40 @@
     <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">If-Then foldable to '?.'</problem_class>
     <description>Foldable if-then</description>
   </problem>
+  <problem>
+    <file>call4.kt</file>
+    <line>10</line>
+    <module>light_idea_test_case</module>
+    <package>&lt;default&gt;</package>
+    <entry_point TYPE="file" FQNAME="temp:///src/call4.kt" />
+    <problem_class severity="INFO" attribute_key="INFO_ATTRIBUTES">If-Then foldable to '?.'</problem_class>
+    <description>Foldable if-then</description>
+  </problem>
+  <problem>
+    <file>call3.kt</file>
+    <line>5</line>
+    <module>light_idea_test_case</module>
+    <package>&lt;default&gt;</package>
+    <entry_point TYPE="file" FQNAME="temp:///src/call3.kt" />
+    <problem_class severity="INFO" attribute_key="INFO_ATTRIBUTES">If-Then foldable to '?.'</problem_class>
+    <description>Foldable if-then</description>
+  </problem>
+  <problem>
+    <file>call2.kt</file>
+    <line>5</line>
+    <module>light_idea_test_case</module>
+    <package>&lt;default&gt;</package>
+    <entry_point TYPE="file" FQNAME="temp:///src/call2.kt" />
+    <problem_class severity="INFO" attribute_key="INFO_ATTRIBUTES">If-Then foldable to '?.'</problem_class>
+    <description>Foldable if-then</description>
+  </problem>
+  <problem>
+    <file>call.kt</file>
+    <line>5</line>
+    <module>light_idea_test_case</module>
+    <package>&lt;default&gt;</package>
+    <entry_point TYPE="file" FQNAME="temp:///src/call.kt" />
+    <problem_class severity="INFO" attribute_key="INFO_ATTRIBUTES">If-Then foldable to '?.'</problem_class>
+    <description>Foldable if-then</description>
+  </problem>
 </problems>