43 lines
1.5 KiB
Rust
43 lines
1.5 KiB
Rust
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// Licensed under the Apache License, Version 2.0
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// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT
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// license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. All files in the project carrying such notice may not be copied,
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// modified, or distributed except according to those terms.
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#![cfg_attr(not(feature = "std"), no_std)]
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extern crate alloc;
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extern crate pest;
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extern crate pest_derive;
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#[cfg(feature = "grammar-extras")]
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use pest::Parser;
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use pest_derive::Parser;
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#[derive(Parser)]
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#[grammar = "../tests/opt.pest"]
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struct TestOptParser;
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#[test]
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#[cfg(feature = "grammar-extras")]
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fn test_opt_tag() {
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let successful_parse = TestOptParser::parse(Rule::expr, "*");
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assert!(successful_parse.is_ok());
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let pairs = successful_parse.unwrap();
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assert!(pairs.find_first_tagged("prefix").is_some());
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assert!(pairs.find_first_tagged("suffix").is_none());
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// Test with no STAR or DOT
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let parse_no_components = TestOptParser::parse(Rule::expr, "");
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assert!(parse_no_components.is_ok());
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let pairs_no_components = parse_no_components.unwrap();
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assert!(pairs_no_components.find_first_tagged("prefix").is_none());
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assert!(pairs_no_components.find_first_tagged("suffix").is_none());
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// Test with only DOT
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let parse_only_dot = TestOptParser::parse(Rule::expr, ".");
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assert!(parse_only_dot.is_ok());
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let pairs_only_dot = parse_only_dot.unwrap();
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assert!(pairs_only_dot.find_first_tagged("prefix").is_none());
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assert!(pairs_only_dot.find_first_tagged("suffix").is_some());
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}
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