test: Add test case for `parse_crate_data`

tests/all/manifest.rs

@@ -292,11 +292,9 @@ fn it_does_not_error_when_wasm_bindgen_is_declared() {
 #[test]
 fn configure_wasm_bindgen_debug_incorrectly_is_error() {
     let fixture = utils::fixture::Fixture::new();
-    fixture
-        .readme()
-        .file(
-            "Cargo.toml",
-            r#"
+    fixture.readme().hello_world_src_lib().file(
+        "Cargo.toml",
+        r#"
             [package]
             authors = ["The wasm-pack developers"]
             description = "so awesome rust+wasm package"
@@ -314,8 +312,7 @@ fn configure_wasm_bindgen_debug_incorrectly_is_error() {
             [package.metadata.wasm-pack.profile.dev.wasm-bindgen]
             debug-js-glue = "not a boolean"
             "#,
-        )
-        .hello_world_src_lib();
+    );
 
     let cli = Cli::from_iter_safe(vec![
         "wasm-pack",
@@ -333,3 +330,40 @@ fn configure_wasm_bindgen_debug_incorrectly_is_error() {
         .to_string()
         .contains("package.metadata.wasm-pack.profile.dev.wasm-bindgen.debug")));
 }
+
+#[test]
+fn parse_crate_data_returns_unused_keys_in_cargo_toml() {
+    let fixture = utils::fixture::Fixture::new();
+    fixture
+        .readme()
+        .file(
+            "Cargo.toml",
+            r#"
+            [package]
+            authors = ["The wasm-pack developers"]
+            description = "so awesome rust+wasm package"
+            license = "WTFPL"
+            name = "whatever"
+            repository = "https://github.com/rustwasm/wasm-pack.git"
+            version = "0.1.0"
+
+            [lib]
+            crate-type = ["cdylib"]
+
+            [dependencies]
+            wasm-bindgen = "0.2"
+
+            [package.metadata.wasmpack.profile.dev.wasm-bindgen]
+            debug-js-glue = true
+            "#,
+        )
+        .hello_world_src_lib();
+
+    let result = manifest::CrateData::parse_crate_data(&fixture.path.join("Cargo.toml"));
+
+    assert!(result.is_ok());
+
+    let manifest::ManifestAndUnsedKeys { unused_keys, .. } = result.unwrap();
+
+    assert!(unused_keys.contains("package.metadata.wasmpack"));
+}