test(config): unsupported TOML types in arrays

Author: weihanglo

tests/testsuite/bad_config.rs

@@ -81,6 +81,86 @@ Caused by:
         .run();
 }
 
+#[cargo_test]
+fn unsupported_types_in_array() {
+    let p = project()
+        .file("src/lib.rs", "")
+        .file(
+            ".cargo/config.toml",
+            r#"
+                  [alias]
+                  ints = [1, 2]
+            "#,
+        )
+        .build();
+    p.cargo("check")
+        .with_status(101)
+        .with_stderr_data(str![[r#"
+[ERROR] could not load Cargo configuration
+
+Caused by:
+  failed to load TOML configuration from `[ROOT]/foo/.cargo/config.toml`
+
+Caused by:
+  failed to parse config at `alias.ints[0]`
+
+Caused by:
+  expected string but found integer at index 0
+
+"#]])
+        .run();
+
+    p.change_file(
+        ".cargo/config.toml",
+        r#"
+              [alias]
+              floats = [2.71828, 3.14159]
+        "#,
+    );
+
+    p.cargo("check")
+        .with_status(101)
+        .with_stderr_data(str![[r#"
+[ERROR] could not load Cargo configuration
+
+Caused by:
+  failed to load TOML configuration from `[ROOT]/foo/.cargo/config.toml`
+
+Caused by:
+  failed to parse config at `alias.floats[0]`
+
+Caused by:
+  expected string but found float at index 0
+
+"#]])
+        .run();
+
+    p.change_file(
+        ".cargo/config.toml",
+        r#"
+              [alias]
+              datetimes = [07:32:00, 1979-05-27T07:32:00Z]
+        "#,
+    );
+
+    p.cargo("check")
+        .with_status(101)
+        .with_stderr_data(str![[r#"
+[ERROR] could not load Cargo configuration
+
+Caused by:
+  failed to load TOML configuration from `[ROOT]/foo/.cargo/config.toml`
+
+Caused by:
+  failed to parse config at `alias.datetimes[0]`
+
+Caused by:
+  expected string but found datetime at index 0
+
+"#]])
+        .run();
+}
+
 #[cargo_test]
 fn bad3() {
     let registry = registry::init();