[SourceKit] Add tests

Author: Simon Barinka

test/SourceKit/Indexing/index_locals.swift

@@ -0,0 +1,33 @@
+// RUN: %sourcekitd-test -req=index -req-opts=should_index_locals=1 %s -- -Xfrontend -serialize-diagnostics-path -Xfrontend %t.dia -Xfrontend -disable-implicit-concurrency-module-import -Xfrontend -disable-implicit-string-processing-module-import %s | %sed_clean > %t.response
+// RUN: %diff -u %s.response %t.response
+
+func foo(a: Int, b: Double) {
+    var locVar = 1
+}
+
+var globalVar = 2
+
+class A : ExpressibleByIntegerLiteral {
+    required init(integerLiteral value: IntegerLiteralType) {}
+}
+
+func bar() {
+    var locVar1: A = 1
+    let locVar2 = 2
+    foo(a: globalVar, b: Double(locVar2))
+    let closure = { (arg1: Int, arg2: Int) -> Int in
+         let locVar3 = 3
+         let expr: Int = locVar2 + globalVar + arg1
+         return expr
+    }
+}
+
+class X {
+    func baz() {
+        func inner(_ x: Int) -> Int { return x }
+        var arr: [Int] = [1, 2, 3]
+        if (globalVar > 2) {
+            arr = arr.map { inner($0) }
+        }
+    }
+}