mirror of
https://github.com/roc-lang/roc.git
synced 2025-10-02 16:21:11 +00:00
814 lines
15 KiB
Rust
814 lines
15 KiB
Rust
#[macro_use]
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extern crate pretty_assertions;
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#[macro_use]
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extern crate indoc;
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extern crate bumpalo;
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extern crate roc;
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mod helpers;
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#[cfg(test)]
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mod test_infer {
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use crate::helpers::can_expr;
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use roc::infer::infer_expr;
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use roc::pretty_print_types::{content_to_string, name_all_type_vars};
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use roc::subs::Subs;
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// HELPERS
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fn infer_eq(src: &str, expected: &str) {
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let (_, output, _, var_store, variable) = can_expr(src);
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let mut subs = Subs::new(var_store.into());
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let content = infer_expr(&mut subs, &output.constraint, variable);
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name_all_type_vars(variable, &mut subs);
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let actual_str = content_to_string(content, &mut subs);
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assert_eq!(actual_str, expected.to_string());
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}
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#[test]
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fn empty_record() {
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infer_eq("{}", "{}");
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}
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#[test]
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fn int_literal() {
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infer_eq("5", "Int");
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}
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#[test]
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fn float_literal() {
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infer_eq("0.5", "Float");
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}
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#[test]
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fn string_literal() {
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infer_eq(
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indoc!(
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r#"
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"type inference!"
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"#
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),
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"Str",
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);
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}
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#[test]
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fn empty_string() {
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infer_eq(
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indoc!(
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r#"
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""
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"#
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),
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"Str",
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);
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}
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// #[test]
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// fn block_string_literal() {
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// infer_eq(
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// indoc!(
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// r#"
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// """type
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// inference!"""
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// "#
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// ),
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// "Str",
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// );
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// }
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// LIST
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#[test]
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fn empty_list() {
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infer_eq(
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indoc!(
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r#"
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[]
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"#
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),
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"List *",
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);
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}
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#[test]
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fn list_of_lists() {
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infer_eq(
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indoc!(
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r#"
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[[]]
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"#
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),
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"List (List *)",
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);
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}
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#[test]
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fn triple_nested_list() {
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infer_eq(
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indoc!(
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r#"
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[[[]]]
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"#
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),
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"List (List (List *))",
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);
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}
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#[test]
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fn nested_empty_list() {
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infer_eq(
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indoc!(
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r#"
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[ [], [ [] ] ]
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"#
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),
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"List (List (List *))",
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);
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}
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// #[test]
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// fn concat_different_types() {
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// infer_eq(
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// indoc!(
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// r#"
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// empty = []
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// one = List.concat [ 1 ] empty
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// str = List.concat [ "blah" ] empty
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// empty
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// "#
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// ),
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// "List *",
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// );
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// }
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#[test]
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fn list_of_one_int() {
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infer_eq(
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indoc!(
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r#"
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[42]
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"#
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),
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"List Int",
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);
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}
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#[test]
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fn triple_nested_int_list() {
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infer_eq(
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indoc!(
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r#"
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[[[ 5 ]]]
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"#
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),
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"List (List (List Int))",
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);
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}
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#[test]
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fn list_of_ints() {
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infer_eq(
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indoc!(
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r#"
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[ 1, 2, 3 ]
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"#
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),
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"List Int",
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);
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}
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#[test]
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fn nested_list_of_ints() {
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infer_eq(
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indoc!(
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r#"
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[ [ 1 ], [ 2, 3 ] ]
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"#
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),
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"List (List Int)",
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);
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}
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#[test]
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fn list_of_one_string() {
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infer_eq(
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indoc!(
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r#"
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[ "cowabunga" ]
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"#
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),
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"List Str",
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);
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}
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#[test]
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fn triple_nested_string_list() {
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infer_eq(
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indoc!(
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r#"
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[[[ "foo" ]]]
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"#
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),
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"List (List (List Str))",
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);
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}
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#[test]
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fn list_of_strings() {
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infer_eq(
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indoc!(
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r#"
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[ "foo", "bar" ]
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"#
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),
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"List Str",
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);
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}
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// // INTERPOLATED STRING
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// #[test]
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// fn infer_interpolated_string() {
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// infer_eq(
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// indoc!(
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// r#"
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// whatItIs = "great"
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// "type inference is \(whatItIs)!"
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// "#
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// ),
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// "Str",
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// );
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// }
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// LIST MISMATCH
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#[test]
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fn mismatch_heterogeneous_list() {
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infer_eq(
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indoc!(
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r#"
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[ "foo", 5 ]
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"#
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),
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"List <type mismatch>",
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);
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}
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#[test]
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fn mismatch_heterogeneous_nested_list() {
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infer_eq(
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indoc!(
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r#"
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[ [ "foo", 5 ] ]
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"#
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),
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"List (List <type mismatch>)",
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);
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}
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#[test]
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fn mismatch_heterogeneous_nested_empty_list() {
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infer_eq(
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indoc!(
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r#"
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[ [ 1 ], [ [] ] ]
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"#
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),
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"List (List <type mismatch>)",
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);
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}
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// CLOSURE
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#[test]
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fn always_return_empty_record() {
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infer_eq(
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indoc!(
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r#"
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\_ -> {}
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"#
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),
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"* -> {}",
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);
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}
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#[test]
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fn two_arg_return_int() {
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infer_eq(
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indoc!(
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r#"
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\_ _ -> 42
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"#
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),
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"*, * -> Int",
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);
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}
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#[test]
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fn three_arg_return_string() {
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infer_eq(
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indoc!(
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r#"
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\_ _ _ -> "test!"
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"#
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),
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"*, *, * -> Str",
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);
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}
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// DEF
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#[test]
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fn def_empty_record() {
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infer_eq(
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indoc!(
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r#"
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foo = {}
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foo
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"#
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),
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"{}",
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);
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}
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#[test]
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fn def_string() {
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infer_eq(
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indoc!(
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r#"
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str = "thing"
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str
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"#
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),
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"Str",
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);
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}
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#[test]
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fn def_1_arg_closure() {
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infer_eq(
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indoc!(
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r#"
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fn = \_ -> {}
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fn
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"#
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),
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"* -> {}",
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);
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}
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#[test]
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fn def_2_arg_closure() {
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infer_eq(
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indoc!(
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r#"
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func = \_ _ -> 42
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func
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"#
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),
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"*, * -> Int",
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);
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}
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#[test]
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fn def_3_arg_closure() {
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infer_eq(
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indoc!(
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r#"
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f = \_ _ _ -> "test!"
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f
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"#
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),
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"*, *, * -> Str",
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);
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}
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#[test]
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fn def_multiple_functions() {
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infer_eq(
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indoc!(
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r#"
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a = \_ _ _ -> "test!"
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b = a
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b
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"#
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),
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"*, *, * -> Str",
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);
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}
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#[test]
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fn def_multiple_strings() {
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infer_eq(
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indoc!(
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r#"
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a = "test!"
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b = a
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b
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"#
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),
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"Str",
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);
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}
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#[test]
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fn def_multiple_ints() {
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infer_eq(
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indoc!(
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r#"
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c = b
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b = a
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a = 42
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c
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"#
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),
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"Int",
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);
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}
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#[test]
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fn def_returning_closure() {
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infer_eq(
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indoc!(
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r#"
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f = \z -> z
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g = \z -> z
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(\x ->
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a = f x
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b = g x
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x
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)
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"#
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),
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"a -> a",
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);
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}
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// CALLING FUNCTIONS
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#[test]
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fn call_returns_int() {
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infer_eq(
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indoc!(
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r#"
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alwaysFive = \_ -> 5
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alwaysFive "stuff"
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"#
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),
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"Int",
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);
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}
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#[test]
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fn identity_returns_given_type() {
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infer_eq(
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indoc!(
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r#"
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identity = \a -> a
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identity "hi"
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"#
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),
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"Str",
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);
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}
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#[test]
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fn call_returns_list() {
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infer_eq(
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indoc!(
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r#"
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enlist = \val -> [ val ]
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enlist 5
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"#
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),
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"List Int",
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);
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}
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// TODO type annotations
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// TODO BoundTypeVariables
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// TODO conditionals
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#[test]
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fn indirect_always() {
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infer_eq(
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indoc!(
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r#"
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always = \val -> (\_ -> val)
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alwaysFoo = always "foo"
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alwaysFoo 42
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"#
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),
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"Str",
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);
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}
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#[test]
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fn pizza_desugar() {
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infer_eq(
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indoc!(
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r#"
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1 |> (\a -> a)
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"#
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),
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"Int",
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);
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}
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#[test]
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fn pizza_desugar_two_arguments() {
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infer_eq(
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indoc!(
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r#"
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always = \a b -> a
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1 |> always "foo"
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"#
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),
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"Int",
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);
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}
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#[test]
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fn anonymous_identity() {
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infer_eq(
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indoc!(
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r#"
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(\a -> a) 3.14
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"#
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),
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"Float",
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);
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}
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#[test]
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fn identity_of_identity() {
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infer_eq(
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indoc!(
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r#"
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(\val -> val) (\val -> val)
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"#
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),
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"a -> a",
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);
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}
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// #[test]
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// TODO FIXME this should work, but instead causes a stack overflow!
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// fn recursive_identity() {
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// infer_eq(
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// indoc!(
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// r#"
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// identity = \val -> val
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// identity identity
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// "#
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// ),
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// "a -> a",
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// );
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// }
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#[test]
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fn identity_function() {
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infer_eq(
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indoc!(
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r#"
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\val -> val
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"#
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),
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"a -> a",
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);
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}
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#[test]
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fn use_apply() {
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infer_eq(
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indoc!(
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r#"
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apply = \f x -> f x
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identity = \a -> a
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|
apply identity 5
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"#
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),
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"Int",
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);
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}
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|
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#[test]
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fn apply_function() {
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infer_eq(
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indoc!(
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r#"
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\f x -> f x
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"#
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),
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"(a -> b), a -> b",
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);
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}
|
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|
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// #[test]
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// TODO FIXME this should pass, but instead fails to canonicalize
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// fn use_flip() {
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// infer_eq(
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// indoc!(
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// r#"
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// flip = \f -> (\a b -> f b a)
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// neverendingInt = \f int -> f int
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// x = neverendingInt (\a -> a) 5
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// flip neverendingInt
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// "#
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// ),
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// "(Int, (a -> a)) -> Int",
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// );
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// }
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#[test]
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fn flip_function() {
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infer_eq(
|
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indoc!(
|
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r#"
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\f -> (\a b -> f b a),
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"#
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|
),
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"(a, b -> c) -> (b, a -> c)",
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);
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}
|
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|
|
#[test]
|
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fn always_function() {
|
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infer_eq(
|
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indoc!(
|
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r#"
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\val -> \_ -> val
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|
"#
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),
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"a -> (* -> a)",
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);
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}
|
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|
|
#[test]
|
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fn pass_a_function() {
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infer_eq(
|
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indoc!(
|
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r#"
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\f -> f {}
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"#
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|
),
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"({} -> a) -> a",
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);
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}
|
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|
|
// OPERATORS
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|
|
|
// #[test]
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|
// fn div_operator() {
|
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// infer_eq(
|
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// indoc!(
|
|
// r#"
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|
// \l r -> l / r
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|
// "#
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// ),
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// "Float, Float -> Float",
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// );
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// }
|
|
|
|
// #[test]
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|
// fn basic_float_division() {
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// infer_eq(
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// indoc!(
|
|
// r#"
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|
// 1 / 2
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|
// "#
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|
// ),
|
|
// "Float",
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// );
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// }
|
|
|
|
// #[test]
|
|
// fn basic_int_division() {
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// infer_eq(
|
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// indoc!(
|
|
// r#"
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|
// 1 // 2
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// "#
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// ),
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|
// "Int",
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// );
|
|
// }
|
|
|
|
// #[test]
|
|
// fn basic_addition() {
|
|
// infer_eq(
|
|
// indoc!(
|
|
// r#"
|
|
// 1 + 2
|
|
// "#
|
|
// ),
|
|
// "Int",
|
|
// );
|
|
// }
|
|
|
|
// #[test]
|
|
// fn basic_circular_type() {
|
|
// infer_eq(
|
|
// indoc!(
|
|
// r#"
|
|
// \x -> x x
|
|
// "#
|
|
// ),
|
|
// "<Type Mismatch: Circular Type>",
|
|
// );
|
|
// }
|
|
|
|
// #[test]
|
|
// fn y_combinator_has_circular_type() {
|
|
// assert_eq!(
|
|
// infer(indoc!(r#"
|
|
// \f -> (\x -> f x x) (\x -> f x x)
|
|
// "#)),
|
|
// Erroneous(Problem::CircularType)
|
|
// );
|
|
// }
|
|
|
|
// #[test]
|
|
// fn no_higher_ranked_types() {
|
|
// // This should error because it can't type of alwaysFive
|
|
// infer_eq(
|
|
// indoc!(
|
|
// r#"
|
|
// \always -> [ always [], always "" ]
|
|
// "#
|
|
// ),
|
|
// "<type mismatch>",
|
|
// );
|
|
// }
|
|
|
|
#[test]
|
|
fn always_with_list() {
|
|
infer_eq(
|
|
indoc!(
|
|
r#"
|
|
alwaysFive = \_ -> 5
|
|
|
|
[ alwaysFive "foo", alwaysFive [] ]
|
|
"#
|
|
),
|
|
"List Int",
|
|
);
|
|
}
|
|
|
|
// #[test]
|
|
// fn if_with_int_literals() {
|
|
// infer_eq(
|
|
// indoc!(
|
|
// r#"
|
|
// if 1 == 1 then
|
|
// 42
|
|
// else
|
|
// 24
|
|
// "#
|
|
// ),
|
|
// "Int",
|
|
// );
|
|
// }
|
|
|
|
#[test]
|
|
fn case_with_int_literals() {
|
|
infer_eq(
|
|
indoc!(
|
|
r#"
|
|
case 1 when
|
|
1 -> 2
|
|
3 -> 4
|
|
"#
|
|
),
|
|
"Int",
|
|
);
|
|
}
|
|
}
|