teset(pkgid): suggestion for bad parsing

Author: weihanglo

tests/testsuite/pkgid.rs

@@ -54,6 +54,7 @@ fn suggestion_bad_pkgid() {
             "#,
         )
         .file("src/lib.rs", "")
+        .file("cratesio", "")
         .build();
 
     p.cargo("generate-lockfile").run();
@@ -106,6 +107,21 @@ error: invalid package ID specification: `./Cargo.toml`
 
 Caused by:
   package ID specification `./Cargo.toml` looks like a file path, maybe try file://[..]/Cargo.toml
+",
+        )
+        .run();
+
+    // Bad file URL with simliar name.
+    p.cargo("pkgid './cratesio'")
+        .with_status(101)
+        .with_stderr(
+            "\
+error: invalid package ID specification: `./cratesio`
+
+<tab>Did you mean `crates-io`?
+
+Caused by:
+  package ID specification `./cratesio` looks like a file path, maybe try file://[..]/cratesio
 ",
         )
         .run();