1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156

pub mod error;
pub mod trait_;

use crate::thread_safe_cache::{ThreadSafeCacheImpl, ThreadSafeCacheTrait};
use reqwest::blocking::Client;
use trait_::{GetCache, GetClient};
use url::Url;

lazy_static::lazy_static! {
    pub(in crate) static ref DEFAULT_CLIENT: Client = Client::new();
}

#[derive(Debug)]
pub struct Loader<T> {
    cache: ThreadSafeCacheImpl<Url, T>,
}

impl<T> Default for Loader<T> {
    fn default() -> Self {
        Self {
            cache: ThreadSafeCacheImpl::default(),
        }
    }
}

impl<T> GetCache<T> for Loader<T> {
    fn get_cache(&self) -> &dyn ThreadSafeCacheTrait<Url, T> {
        &self.cache
    }
}

impl<T> GetClient<T> for Loader<T> {
    fn get_client(&self) -> &Client {
        &*DEFAULT_CLIENT
    }
}

#[cfg(test)]
pub(in crate) mod testing {
    use super::{
        error::LoaderError,
        trait_::{GetCache, GetClient, LoaderTrait},
        Loader,
    };
    use crate::thread_safe_cache::ThreadSafeCacheTrait;
    use reqwest::blocking::Client;
    use url::Url;

    #[derive(Debug, Default)]
    pub(in crate) struct TestStringLoader(Loader<String>);

    impl GetClient<String> for TestStringLoader {
        fn get_client(&self) -> &Client {
            self.0.get_client()
        }
    }

    impl GetCache<String> for TestStringLoader {
        fn get_cache(&self) -> &dyn ThreadSafeCacheTrait<Url, String> {
            self.0.get_cache()
        }
    }

    impl LoaderTrait<String> for TestStringLoader {
        fn load_from_bytes(&self, content: &[u8]) -> Result<String, LoaderError> {
            match std::str::from_utf8(content) {
                Ok(str_ref) => Ok(str_ref.to_string()),
                Err(utf8_error) => Err(LoaderError::FormatError(utf8_error.to_string())),
            }
        }
    }
}

#[cfg(test)]
mod tests {
    use super::{error::LoaderError, testing::TestStringLoader, trait_::LoaderTrait};
    use crate::{
        testing_helpers::{test_data_file_path, MockLoaderRequestBuilder},
        url_helpers::UrlError,
    };
    use std::sync::Arc;
    use url::Url;

    #[test]
    fn test_load_wrong_url_parse_error() {
        match TestStringLoader::default().load("this-is-a-wrong-url").unwrap_err() {
            LoaderError::InvalidURL(UrlError::ParseError(url::ParseError::RelativeUrlWithoutBase)) => (),
            loader_error => panic!(
                "Expected LoaderError::InvalidURL(UrlError::ParseError(url::ParseError::RelativeUrlWithoutBase)), received {:?}",
                loader_error,
            ),
        }
    }

    #[test]
    fn test_load_wrong_url_syntax_error() {
        match TestStringLoader::default().load("http:/this-is-syntactically-invalid-url").unwrap_err() {
            LoaderError::InvalidURL(UrlError::SyntaxViolation(url::SyntaxViolation::ExpectedDoubleSlash)) => (),
            loader_error => panic!(
                "Expected LoaderError::InvalidURL(UrlError::ParseError(url::ParseError::RelativeUrlWithoutBase)), received {:?}",
                loader_error,
            ),
        }
    }

    #[test]
    fn test_load_from_not_existing_file() {
        let mut non_exiting_file_url = Url::from_file_path(test_data_file_path(&["empty"]).unwrap().as_path()).unwrap().to_string();
        non_exiting_file_url.push_str("_not_existing");

        assert!(matches!(
            TestStringLoader::default().load(&non_exiting_file_url).unwrap_err(),
            LoaderError::IOError(value) if value.kind() == std::io::ErrorKind::NotFound
        ));
    }

    #[test]
    fn test_load_from_not_existing_url() {
        assert!(matches!(
            MockLoaderRequestBuilder::default()
                .resp_status_code(404)
                .build()
                .unwrap()
                .send_request(&TestStringLoader::default())
                .unwrap_err(),
            LoaderError::FetchURLFailed(value) if value.status().map(|value| value.as_u16()) == Some(404)
        ));
    }

    #[test]
    fn test_load_valid_url() {
        assert_eq!(
            MockLoaderRequestBuilder::default()
                .resp_body("")
                .build()
                .unwrap()
                .send_request(&TestStringLoader::default())
                .unwrap(),
            Arc::new("".to_string())
        );
    }

    #[test]
    fn test_load_valid_url_on_different_fragments() {
        assert_eq!(
            MockLoaderRequestBuilder::default().resp_body("").build().unwrap().run_in_mock_context(&|url| {
                let loader = TestStringLoader::default();
                let resp = loader.get_or_fetch_with_result(url).unwrap();

                assert_eq!(resp, loader.get_or_fetch_with_result(&url.join("#/a_fragment").unwrap()).unwrap());
                resp
            }),
            Arc::new("".to_string())
        );
    }
}