Cargo: dev-dependencies.cfg-if = 1

Cargo.lock

@@ -36,6 +36,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
 [[package]]
 name = "ctor"
 version = "0.1.20"
@@ -146,5 +152,6 @@ dependencies = [
  "anyhow",
  "atoi",
  "bitflags",
+ "cfg-if",
  "pretty_assertions",
 ]

Cargo.toml

@@ -6,6 +6,13 @@ edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[features]
+# PRIVATE! FOR USE IN TEST ONLY!
+test_buffer = []
+test_buffer_large = ["test_buffer"]
+test_buffer_medium = ["test_buffer"]
+test_buffer_small = ["test_buffer"]
+
 [dependencies]
 atoi = "0.4"
 bitflags = "1"
@@ -13,3 +20,4 @@ bitflags = "1"
 [dev-dependencies]
 anyhow = "1"
 pretty_assertions = "0.7"
+cfg-if = "1"