Fix harness = false on [lib] sections

Now that this is fixed upstream, we can actually add a test for this!

Closes rust-lang#2305

src/cargo/ops/cargo_rustc/mod.rs

@@ -467,8 +467,10 @@ fn build_base_args(cx: &Context,
 
     cmd.arg("--crate-name").arg(&unit.target.crate_name());
 
-    for crate_type in crate_types.iter() {
-        cmd.arg("--crate-type").arg(crate_type);
+    if !test {
+        for crate_type in crate_types.iter() {
+            cmd.arg("--crate-type").arg(crate_type);
+        }
     }
 
     let prefer_dynamic = (unit.target.for_host() &&
@@ -515,6 +517,8 @@ fn build_base_args(cx: &Context,
 
     if test && unit.target.harness() {
         cmd.arg("--test");
+    } else if test {
+        cmd.arg("--cfg").arg("test");
     }
 
     if let Some(features) = cx.resolve.features(unit.pkg.package_id()) {

src/rustversion.txt

@@ -1 +1 @@
-2016-05-13
+2016-06-21

tests/registry.rs

@@ -1067,6 +1067,6 @@ fn upstream_warnings_on_extra_verbose() {
 
     assert_that(p.cargo("build").arg("-vv"),
                 execs().with_status(0).with_stderr_contains("\
-[..] warning: function is never used[..]
+[..]warning: function is never used[..]
 "));
 }

tests/rustc.rs

@@ -209,7 +209,7 @@ fn build_with_args_to_one_of_multiple_tests() {
 [COMPILING] foo v0.0.1 ({url})
 [RUNNING] `rustc src{sep}lib.rs --crate-name foo --crate-type lib -g \
         --out-dir {dir}{sep}target{sep}debug [..]`
-[RUNNING] `rustc tests{sep}bar.rs --crate-name bar --crate-type bin -g \
+[RUNNING] `rustc tests{sep}bar.rs --crate-name bar -g \
         -C debug-assertions [..]--test[..]`
 ", sep = SEP,
                 dir = p.root().display(), url = p.url())));

tests/test.rs

@@ -2161,3 +2161,35 @@ fn test_panic_abort_with_dep() {
     assert_that(p.cargo_process("test").arg("-v"),
                 execs().with_status(0));
 }
+
+#[test]
+fn cfg_test_even_with_no_harness() {
+    if !is_nightly() {
+        return
+    }
+    let p = project("foo")
+        .file("Cargo.toml", r#"
+            [package]
+            name = "foo"
+            version = "0.0.1"
+            authors = []
+
+            [lib]
+            harness = false
+            doctest = false
+        "#)
+        .file("src/lib.rs", r#"
+            #[cfg(test)]
+            fn main() {
+                println!("hello!");
+            }
+        "#);
+    assert_that(p.cargo_process("test").arg("-v"),
+                execs().with_status(0)
+                       .with_stdout("hello!\n")
+                       .with_stderr("\
+[COMPILING] foo v0.0.1 ([..])
+[RUNNING] `rustc [..]`
+[RUNNING] `[..]`
+"));
+}