[Tests] Fix SubStreamReader tests

Author: tonyfreeman

Tests/Stream/SubStreamReader/main.swift

@@ -2,39 +2,39 @@ import Test
 @testable import Stream
 
 test.case("LimitedBy") {
-    let stream = ByteArrayInputStream([UInt8]("Hello, World!".utf8))
+    let stream = ByteArrayInputStream("Hello, World!") as StreamReader
     let hello = try await stream.withSubStreamReader(limitedBy: 5) { stream in
         return try await stream.readUntilEnd(as: String.self)
     }
-    try stream.consume(count: 2)
+    try await stream.consume(count: 2)
     let world = try await stream.readUntilEnd(as: String.self)
     expect(hello == "Hello")
     expect(world == "World!")
 }
 
 test.case("SizedBy") {
     let bytes = [0x00, 0x05] + [UInt8]("Hello, World!".utf8)
-    let stream = ByteArrayInputStream(bytes)
+    let stream = ByteArrayInputStream(bytes) as StreamReader
     let hello = try await stream.withSubStreamReader(sizedBy: UInt16.self)
     { stream in
         return try await stream.readUntilEnd(as: String.self)
     }
-    try stream.consume(count: 2)
+    try await stream.consume(count: 2)
     let world = try await stream.readUntilEnd(as: String.self)
     expect(hello == "Hello")
     expect(world == "World!")
 }
 
 test.case("SizedByIncludingHeader") {
     let bytes = [0x00, 0x07] + [UInt8]("Hello, World!".utf8)
-    let stream = ByteArrayInputStream(bytes)
+    let stream = ByteArrayInputStream(bytes) as StreamReader
     let hello = try await  stream.withSubStreamReader(
         sizedBy: UInt16.self,
         includingHeader: true)
     { stream in
         return try await stream.readUntilEnd(as: String.self)
     }
-    try stream.consume(count: 2)
+    try await stream.consume(count: 2)
     let world = try await stream.readUntilEnd(as: String.self)
     expect(hello == "Hello")
     expect(world == "World!")