Tests: Add operator lookup tests to extensions_transitive.swift.

Author: tshortli

test/NameLookup/Inputs/extensions_A.swift

@@ -8,10 +8,18 @@ extension Y: P where T: P { }
 
 public struct Z: P { }
 
+infix operator <<<
+infix operator >>>
+infix operator <>
+
 extension X {
   public func XinA() { }
+
+  public static func <<<(a: Self, b: Self) -> Self { a }
 }
 
 extension Y {
   public func YinA() { }
+
+  public static func <<<(a: Self, b: Self) -> Self { a }
 }

test/NameLookup/Inputs/extensions_B.swift

@@ -1,10 +1,15 @@
 import extensions_A
 
+
 extension X {
   public func XinB() { }
+
+  public static func >>>(a: Self, b: Self) -> Self { b }
 }
 
 extension Y {
   public func YinB() { }
+
+  public static func >>>(a: Self, b: Self) -> Self { b }
 }
 

test/NameLookup/Inputs/extensions_C.swift

@@ -1,11 +1,15 @@
 @_exported import extensions_A
 import extensions_B
 
+
 extension X {
   public func XinC() { }
+
+  public static func <>(a: Self, b: Self) -> Self { a }
 }
 
 extension Y {
   public func YinC() { }
-}
 
+  public static func <>(a: Self, b: Self) -> Self { a }
+}

test/NameLookup/extensions_transitive.swift

@@ -7,12 +7,21 @@
 import extensions_C
 // expected-note 2{{add import of module 'extensions_B'}}{{1-1=import extensions_B\n}}
 func test(x: X, y: Y<Z>) {
+  // Declared in extensions_A
   x.XinA()
   y.YinA()
+  _ = x <<< x
+  _ = y <<< y
 
+  // Declared in extensions_B
   x.XinB() // expected-error{{instance method 'XinB()' is not available due to missing import of defining module 'extensions_B'}}
   y.YinB() // expected-error{{instance method 'YinB()' is not available due to missing import of defining module 'extensions_B'}}
+  _ = x >>> x // expected-error{{cannot find operator '>>>' in scope}}
+  _ = y >>> y // expected-error{{cannot find operator '>>>' in scope}}
 
+  // Declared in extensions_C
   x.XinC()
   y.YinC()
+  _ = x <> x
+  _ = y <> y
 }