test(package): Verify the no-manifest case

Author: epage

tests/testsuite/package.rs

@@ -3041,3 +3041,59 @@ src/main.rs
         &[],
     );
 }
+#[cargo_test]
+#[cfg(windows)] // windows is the platform that is most consistently configured for case insensitive filesystems
+fn no_manifest_found() {
+    let p = project()
+        .file("src/main.rs", r#"fn main() { println!("hello"); }"#)
+        .file("src/bar.txt", "") // should be ignored when packaging
+        .build();
+    // Workaround `project()` making a `Cargo.toml` on our behalf
+    std::fs::remove_file(p.root().join("Cargo.toml")).unwrap();
+    std::fs::write(
+        p.root().join("CARGO.TOML"),
+        r#"
+                [package]
+                name = "foo"
+                version = "0.0.1"
+                authors = []
+                exclude = ["*.txt"]
+                license = "MIT"
+                description = "foo"
+            "#,
+    )
+    .unwrap();
+
+    p.cargo("package")
+        .with_stderr(
+            "\
+[WARNING] manifest has no documentation[..]
+See [..]
+[PACKAGING] foo v0.0.1 ([CWD])
+[VERIFYING] foo v0.0.1 ([CWD])
+[COMPILING] foo v0.0.1 ([CWD][..])
+[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
+[PACKAGED] 3 files, [..] ([..] compressed)
+",
+        )
+        .run();
+    assert!(p.root().join("target/package/foo-0.0.1.crate").is_file());
+    p.cargo("package -l")
+        .with_stdout(
+            "\
+CARGO.TOML
+Cargo.lock
+src/main.rs
+",
+        )
+        .run();
+    p.cargo("package").with_stdout("").run();
+
+    let f = File::open(&p.root().join("target/package/foo-0.0.1.crate")).unwrap();
+    validate_crate_contents(
+        f,
+        "foo-0.0.1.crate",
+        &["CARGO.TOML", "Cargo.lock", "src/main.rs"],
+        &[],
+    );
+}