[CodeCompletion] Add test cases for implicitly curried self arg

Author: rintaro

test/IDE/complete_call_arg.swift

@@ -70,6 +70,10 @@
 // RUN: %target-swift-ide-test -code-completion -source-filename %s -code-completion-token=ERRORCONTEXT_NESTED_1 | %FileCheck %s -check-prefix=ERRORCONTEXT_NESTED_1
 // RUN: %target-swift-ide-test -code-completion -source-filename %s -code-completion-token=ERRORCONTEXT_NESTED_2 | %FileCheck %s -check-prefix=ERRORCONTEXT_NESTED_1
 
+// RUN: %target-swift-ide-test -code-completion -source-filename %s -code-completion-token=CURRIED_SELF_1 | %FileCheck %s -check-prefix=CURRIED_SELF_1
+// RUN: %target-swift-ide-test -code-completion -source-filename %s -code-completion-token=CURRIED_SELF_2 | %FileCheck %s -check-prefix=CURRIED_SELF_1
+// RUN: %target-swift-ide-test -code-completion -source-filename %s -code-completion-token=CURRIED_SELF_3 | %FileCheck %s -check-prefix=CURRIED_SELF_1
+
 var i1 = 1
 var i2 = 2
 var oi1 : Int?
@@ -589,3 +593,16 @@ func testNestedContext() {
   for _ in [bar(#^ERRORCONTEXT_NESTED_2^#)] {}
 // Same as ERRORCONTEXT_NESTED_1.
 }
+
+class TestImplicitlyCurriedSelf {
+  func foo(x: Int) { }
+  static func test() {
+    foo(#^CURRIED_SELF_1^#
+    self.foo(#^CURRIED_SELF_2^#
+    TestImplicitlyCurriedSelf.foo(#^CURRIED_SELF_3^#
+
+// CURRIED_SELF_1: Begin completions, 1 items
+// CURRIED_SELF_1-DAG: Pattern/CurrModule:                 ['(']{#(self): TestImplicitlyCurriedSelf#}[')'][#(Int) -> ()#]{{; name=.+$}}
+// CURRIED_SELF_1: End completions
+  }
+}