Add parse_export tests

parcel/src/es6.rs

@@ -15,15 +15,15 @@ macro_rules! expected {
     }};
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq)]
 pub enum Export<'s> {
     Default(&'s str),
     AllFrom(Cow<'s, str>),
     Named(Vec<ExportSpec<'s>>),
     NamedFrom(Vec<ExportSpec<'s>>, Cow<'s, str>),
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct ExportSpec<'s> {
     bind: &'s str,
     name: &'s str,
@@ -979,4 +979,116 @@ mod test {
             "')'",
         ).unwrap();
     }
+
+    fn assert_export_form(source: &str, result: Export, out: &str) {
+        let mut lexer = lex::Lexer::new_unnamed(source);
+        assert_eq!(lexer.advance().tt, Tt::Export);
+        let mut output = String::new();
+        assert_eq!(parse_export(&mut lexer, &mut output).unwrap(), result);
+        assert_eq!(output, out);
+    }
+
+    fn assert_export_form_panic(source: &str) {
+        let mut lexer = lex::Lexer::new_unnamed(source);
+        assert_eq!(lexer.advance().tt, Tt::Export);
+        let mut output = String::new();
+        parse_export(&mut lexer, &mut output).unwrap_err();
+    }
+
+    #[test]
+    fn test_export_default() {
+        assert_export_form(
+            "export //\ndefault /* comment */ 0 _next",
+            Export::Default("__default"),
+            // " //\n /* comment */ 0",
+            " //\nconst __default = ",
+        );
+        assert_export_form(
+            "export default class Test {} _next",
+            Export::Default("Test"),
+            // "  class Test {}",
+            "  class Test",
+        );
+        assert_export_form(
+            "export default function test() {} _next",
+            Export::Default("test"),
+            // "  function test() {}",
+            "  function test",
+        );
+        assert_export_form(
+            "export default function* testGen() {} _next",
+            Export::Default("testGen"),
+            // "  function* testGen() {}",
+            "  function* testGen",
+        );
+    }
+
+    #[test]
+    fn test_export_default_exprs_panic() {
+        assert_export_form_panic("export default class {} _next");
+        assert_export_form_panic("export default function() {} _next");
+        assert_export_form_panic("export default function*() {} _next");
+    }
+
+    #[test]
+    fn test_export_binding() {
+        assert_export_form(
+            "export var asdf _next",
+            Export::Named(vec![ExportSpec::same("asdf")]),
+            " var asdf",
+        );
+        assert_export_form(
+            "export let a = 1, b = (1, 2), c = 3, d = (za, zb) => b, e _next",
+            Export::Named(vec![
+                ExportSpec::same("a"),
+                ExportSpec::same("b"),
+                ExportSpec::same("c"),
+                ExportSpec::same("d"),
+                ExportSpec::same("e"),
+            ]),
+            " let a = 1, b = (1, 2), c = 3, d = (za, zb) => b, e",
+        );
+        assert_export_form(
+            "export const j = class A extends B(c, d) {}, k = 1 _next",
+            Export::Named(vec![
+                ExportSpec::same("j"),
+                ExportSpec::same("k"),
+            ]),
+            " const j = class A extends B(c, d) {}, k = 1",
+        );
+    }
+
+    #[test]
+    fn test_export_hoistable_declaration() {
+        assert_export_form(
+            "export class Test2 {} _next",
+            Export::Named(vec![ExportSpec::same("Test2")]),
+            // " class Test2 {}",
+            " class Test2",
+        );
+        assert_export_form(
+            "export function test2() {} _next",
+            Export::Named(vec![ExportSpec::same("test2")]),
+            // " function test2() {}",
+            " function test2",
+        );
+        assert_export_form(
+            "export function* testGen2() {} _next",
+            Export::Named(vec![ExportSpec::same("testGen2")]),
+            // " function* testGen2() {}",
+            " function* testGen2",
+        );
+    }
+
+    #[test]
+    fn test_export_list() {
+        assert_export_form(
+            "export {va as vaz, vb} _next",
+            Export::Named(vec![
+                ExportSpec::new("va", "vaz"),
+                ExportSpec::same("vb"),
+            ]),
+            "    ",
+        );
+    }
 }