test(add): add test to show current behaviour of cargo add when @ symbol is missing for the version

Author: dawedawe

tests/testsuite/cargo_add/missing_at_in_crate_spec/in

@@ -0,0 +1 @@
+../add-basic.in/

tests/testsuite/cargo_add/missing_at_in_crate_spec/mod.rs

@@ -0,0 +1,24 @@
+use cargo_test_support::compare::assert_ui;
+use cargo_test_support::current_dir;
+use cargo_test_support::file;
+use cargo_test_support::prelude::*;
+use cargo_test_support::str;
+use cargo_test_support::Project;
+
+#[cargo_test]
+fn case() {
+    let project = Project::from_template(current_dir!().join("in"));
+    let project_root = project.root();
+    let cwd = &project_root;
+
+    snapbox::cmd::Command::cargo_ui()
+        .arg("add")
+        .arg_line("my-package=1.0.0")
+        .current_dir(cwd)
+        .assert()
+        .code(101)
+        .stdout_eq(str![""])
+        .stderr_eq(file!["stderr.term.svg"]);
+
+    assert_ui().subset_matches(current_dir!().join("out"), &project_root);
+}

tests/testsuite/cargo_add/missing_at_in_crate_spec/out/Cargo.toml

@@ -0,0 +1,6 @@
+[workspace]
+
+[package]
+name = "cargo-list-test-fixture"
+version = "0.0.0"
+edition = "2015"

tests/testsuite/cargo_add/missing_at_in_crate_spec/stderr.term.svg

@@ -65,6 +65,7 @@ mod locked_unchanged;
 mod lockfile_updated;
 mod manifest_path_package;
 mod merge_activated_features;
+mod missing_at_in_crate_spec;
 mod multiple_conflicts_with_features;
 mod multiple_conflicts_with_rename;
 mod namever;