gleam/format/src/tests/guards.rs at 38a807b26215067e0d2d51930d45624c1b14f1e8 · giacomocavalieri/gleam · GitHub

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// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: 2023 The Gleam contributors

use crate::assert_format;

#[test]
fn field_access() {
    assert_format!(
        r#"pub fn main() {
  case x {
    _ if a.b -> 1
    _ -> 0
  }
}
"#
    );
}

#[test]
fn nested_field_access() {
    assert_format!(
        r#"pub fn main() {
  case x {
    _ if a.b.c.d -> 1
    _ -> 0
  }
}
"#
    );
}

#[test]
fn operators_in_guard() {
    assert_format!(
        r#"pub fn main() {
  case list.map(codepoints, string.utf_codepoint_to_int) {
    [drive, colon, slash]
      if { slash == 47 || slash == 92 }
      && colon == 58
      && drive >= 65
      && drive <= 90
      || drive >= 97
      && drive <= 122
    -> {
      1
      |> 2
    }
  }
}
"#
    );
}

#[test]
fn commented_operators_in_guard() {
    assert_format!(
        r#"pub fn main() {
  case list.map(codepoints, string.utf_codepoint_to_int) {
    [drive, colon, slash]
      if { slash == 47 || slash == 92 }
      && colon == 58
      // Hello
      && drive >= 65
      && drive <= 90
      // This is a comment
      || drive >= 97
      // And another one
      && drive <= 122
    -> {
      1
      |> 2
    }
  }
}
"#
    );
}

#[test]
fn a_comment_before_a_guard_doesnt_force_it_to_break() {
    assert_format!(
        r#"pub fn main() {
  case wibble {
    // Apparently this comment breaks everything
    _ if wobble -> Ok(state.newest)
  }
}
"#
    );
}

#[test]
fn long_guard_with_alternative_patterns() {
    assert_format!(
        r#"pub fn main() {
  case wibble {
    Wibble(first_one)
      | Wibble(another_one)
      | Wibble(
        this_is_extra_long_to_go_over_the_line_limit,
        this_gets_broken_as_well,
      )
      if True
    -> Ok(wibble)
  }
}
"#
    );
}

#[test]
fn guard_block_is_not_removed_even_if_redundant() {
    assert_format!(
        r#"pub fn main() {
  case todo {
    _ if { True && True } && True -> 1
    _ -> 2
  }
}
"#
    );
}

#[test]
fn nested_guard_block_is_not_removed_even_if_redundant() {
    assert_format!(
        r#"pub fn main() {
  case todo {
    _ if { True && { True && False } } && True -> 1
    _ -> 2
  }
}
"#
    );
}