Swift: Add test cases.

Author: geoffw0

swift/ql/test/library-tests/dataflow/flowsources/custom.swift

@@ -0,0 +1,34 @@
+
+// --- stubs ---
+
+struct URL {
+	init?(string: String) {}
+}
+
+class MyClass {
+	init(contentsOfFile: String) { }
+	init(contentsOfFile: String?, options: [Int]) { }
+	init(contentsOf: URL, fileTypeHint: Int) { }
+
+	init(contentsOfPath: String) { }
+	init(contentsOfDirectory: String) { }
+
+	func append(contentsOf: String) { }
+	func appending(contentsOf: String) -> MyClass { return self }
+}
+
+// --- tests ---
+
+func testCustom() {
+	let url = URL(string: "http://example.com/")!
+
+	let x = MyClass(contentsOfFile: "foo.txt") // $ MISSING: source=remote
+	_ = MyClass(contentsOfFile: "foo.txt", options: []) // $ MISSING: source=remote
+	_ = MyClass(contentsOf: url, fileTypeHint: 1) // $ MISSING: source=remote
+
+	_ = MyClass(contentsOfPath: "/foo/bar") // $ MISSING: source=remote
+	_ = MyClass(contentsOfDirectory: "/foo/bar") // $ MISSING: source=remote
+
+	x.append(contentsOf: "abcdef") // (not a flow source)
+	_ = x.appending(contentsOf: "abcdef") // (not a flow source)
+}