ock 0.1.4

A simple, fast command line utility for working with table-like data
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#[cfg(test)]
mod tests {
    use super::super::*;
    use std::sync::Arc;

    #[test]
    fn test_selector_default() {
        let selector = Selector::default();
        assert_eq!(selector.start_idx, 0);
        assert_eq!(selector.end_idx, std::i64::MAX);
        assert_eq!(selector.step, 1);
        assert_eq!(selector.stopped, false);
        assert_eq!(selector.start_regex.as_str(), ".^");
        assert_eq!(selector.end_regex.as_str(), ".^");
    }

    #[test]
    fn test_selector_partial_eq() {
        let selector1 = Selector::default();
        let selector2 = Selector::default();
        assert_eq!(selector1, selector2);

        let mut selector3 = Selector::default();
        selector3.start_idx = 5;
        assert_ne!(selector1, selector3);

        let mut selector4 = Selector::default();
        selector4.start_regex = get_or_compile_regex("test").unwrap();
        assert_ne!(selector1, selector4);
    }

    #[test]
    fn test_parse_selectors_single_index() {
        let selectors = parse_selectors(&String::from("5")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 5);
        assert_eq!(selectors[0].end_idx, 5);
        assert_eq!(selectors[0].step, 1);
    }

    #[test]
    fn test_parse_selectors_range() {
        let selectors = parse_selectors(&String::from("2:10")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 2);
        assert_eq!(selectors[0].end_idx, 10);
        assert_eq!(selectors[0].step, 1);
    }

    #[test]
    fn test_parse_selectors_range_with_step() {
        let selectors = parse_selectors(&String::from("1:10:2")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 1);
        assert_eq!(selectors[0].end_idx, 10);
        assert_eq!(selectors[0].step, 2);
    }

    #[test]
    fn test_parse_selectors_multiple() {
        let selectors = parse_selectors(&String::from("1,5,10")).unwrap();
        assert_eq!(selectors.len(), 3);

        assert_eq!(selectors[0].start_idx, 1);
        assert_eq!(selectors[0].end_idx, 1);

        assert_eq!(selectors[1].start_idx, 5);
        assert_eq!(selectors[1].end_idx, 5);

        assert_eq!(selectors[2].start_idx, 10);
        assert_eq!(selectors[2].end_idx, 10);
    }

    #[test]
    fn test_parse_selectors_regex() {
        let selectors = parse_selectors(&String::from("pid")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, i64::MAX);
        assert!(selectors[0].start_regex.is_match("PID"));
        assert!(selectors[0].start_regex.is_match("pid"));
        assert!(selectors[0].start_regex.is_match("some_pid_value"));
        assert_eq!(selectors[0].start_regex.as_str(), "(?i).*pid.*");
        assert_eq!(selectors[0].end_regex.as_str(), "(?i).*pid.*");
    }

    #[test]
    fn test_parse_selectors_regex_range() {
        let selectors = parse_selectors(&String::from("start:end")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, i64::MAX);
        assert!(selectors[0].start_regex.is_match("START"));
        assert!(selectors[0].end_regex.is_match("END"));
        assert_eq!(selectors[0].start_regex.as_str(), "(?i).*start.*");
        assert_eq!(selectors[0].end_regex.as_str(), "(?i).*end.*");
    }

    #[test]
    fn test_parse_selectors_mixed_regex_and_index() {
        let selectors = parse_selectors(&String::from("pid,5")).unwrap();
        assert_eq!(selectors.len(), 2);

        // First selector is a regex
        assert_eq!(selectors[0].start_idx, i64::MAX);
        assert!(selectors[0].start_regex.is_match("PID"));

        // Second selector is an index
        assert_eq!(selectors[1].start_idx, 5);
        assert_eq!(selectors[1].end_idx, 5);
    }

    #[test]
    fn test_parse_selectors_empty_components() {
        let selectors = parse_selectors(&String::from(":10")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 0); // Default start
        assert_eq!(selectors[0].end_idx, 10);

        let selectors = parse_selectors(&String::from("5:")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 5);
        assert_eq!(selectors[0].end_idx, i64::MAX); // Default end

        let selectors = parse_selectors(&String::from("::2")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 0); // Default start
        assert_eq!(selectors[0].end_idx, i64::MAX); // Default end
        assert_eq!(selectors[0].step, 2);
    }

    #[test]
    fn test_parse_selectors_complex_multiple() {
        let selectors = parse_selectors(&String::from("1:5,pid,10:20:2,name")).unwrap();
        assert_eq!(selectors.len(), 4);

        // First: range 1:5
        assert_eq!(selectors[0].start_idx, 1);
        assert_eq!(selectors[0].end_idx, 5);
        assert_eq!(selectors[0].step, 1);

        // Second: regex "pid"
        assert!(selectors[1].start_regex.is_match("PID"));

        // Third: range with step 10:20:2
        assert_eq!(selectors[2].start_idx, 10);
        assert_eq!(selectors[2].end_idx, 20);
        assert_eq!(selectors[2].step, 2);

        // Fourth: regex "name"
        assert!(selectors[3].start_regex.is_match("NAME"));
    }

    #[test]
    fn test_parse_selectors_non_integer_step() {
        let result = parse_selectors(&String::from("1:10:abc"));
        assert!(result.is_err());
        let error_msg = result.unwrap_err().to_string();
        assert!(error_msg.contains("Step size must be an integer"));
    }

    #[test]
    fn test_parse_selectors_too_many_components() {
        let result = parse_selectors(&String::from("1:2:3:4"));
        assert!(result.is_err());
        let error_msg = result.unwrap_err().to_string();
        assert!(error_msg.contains("A selector cannot be more than three components long"));
    }

    #[test]
    fn test_parse_selectors_edge_cases() {
        // Test with 1 as index
        let selectors = parse_selectors(&String::from("1")).unwrap();
        assert_eq!(selectors[0].start_idx, 1);
        assert_eq!(selectors[0].end_idx, 1);

        // Test empty string
        let selectors = parse_selectors(&String::from("")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 0);
        assert_eq!(selectors[0].end_idx, i64::MAX);

        // Test multiple commas - empty selectors should select all
        let selectors = parse_selectors(&String::from("1,,3")).unwrap();
        assert_eq!(selectors.len(), 3);
        assert_eq!(selectors[0].start_idx, 1);
        assert_eq!(selectors[1].start_idx, 0); // Empty selector selects all
        assert_eq!(selectors[1].end_idx, i64::MAX); // Empty selector selects all
        assert_eq!(selectors[2].start_idx, 3);
    }

    #[test]
    fn test_parse_selectors_python_slice_semantics() {
        // Test "1::" - from index 1 to end with default step
        let selectors = parse_selectors(&String::from("1::")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 1);
        assert_eq!(selectors[0].end_idx, i64::MAX);
        assert_eq!(selectors[0].step, 1);

        // Test "::2" - every 2nd item from start to end
        let selectors = parse_selectors(&String::from("::2")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 0);
        assert_eq!(selectors[0].end_idx, i64::MAX);
        assert_eq!(selectors[0].step, 2);

        // Test ":5:" - first 5 items (start=0, end=5, step=1)
        let selectors = parse_selectors(&String::from(":5:")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 0);
        assert_eq!(selectors[0].end_idx, 5);
        assert_eq!(selectors[0].step, 1);

        // Test "::" - all items
        let selectors = parse_selectors(&String::from("::")).unwrap();
        assert_eq!(selectors.len(), 1);
        assert_eq!(selectors[0].start_idx, 0);
        assert_eq!(selectors[0].end_idx, i64::MAX);
        assert_eq!(selectors[0].step, 1);
    }

    #[test]
    fn test_parse_selectors_step_zero_error() {
        let result = parse_selectors(&String::from("1:10:0"));
        assert!(result.is_err());
        let error_msg = result.unwrap_err().to_string();
        assert!(error_msg.contains("step size must be a positive integer"));
        assert!(error_msg.contains("1:10:0"));
    }

    #[test]
    fn test_resolve_indices_negative_range() {
        let mut selector = Selector::default();
        selector.start_idx = 1;
        selector.end_idx = -1;
        selector.resolve_indices(5);
        assert_eq!(selector.resolved_start_idx, 0);
        assert_eq!(selector.resolved_end_idx, 3);
    }

    #[test]
    fn test_resolve_indices_single_negative_index() {
        let mut selector = Selector::default();
        selector.start_idx = -1;
        selector.end_idx = -1;
        selector.resolve_indices(5);
        assert_eq!(selector.resolved_start_idx, 4);
        assert_eq!(selector.resolved_end_idx, 4);
    }

    #[test]
    fn test_resolve_indices_out_of_bounds_negative_end() {
        let mut selector = Selector::default();
        selector.start_idx = 1;
        selector.end_idx = -10;
        selector.resolve_indices(5);
        assert_eq!(selector.resolved_start_idx, usize::MAX);
        assert_eq!(selector.resolved_end_idx, usize::MAX);
    }

    #[test]
    fn test_parse_selectors_case_insensitive_regex() {
        let selectors = parse_selectors(&String::from("PID")).unwrap();
        assert!(selectors[0].start_regex.is_match("pid"));
        assert!(selectors[0].start_regex.is_match("PID"));
        assert!(selectors[0].start_regex.is_match("Pid"));
        assert!(selectors[0].start_regex.is_match("pId"));
    }

    #[test]
    fn test_parse_selectors_partial_match_regex() {
        let selectors = parse_selectors(&String::from("user")).unwrap();
        assert!(selectors[0].start_regex.is_match("user"));
        assert!(selectors[0].start_regex.is_match("username"));
        assert!(selectors[0].start_regex.is_match("superuser"));
        assert!(selectors[0].start_regex.is_match("multiuser"));
    }

    #[test]
    fn test_get_or_compile_regex_caches_patterns() {
        {
            let mut cache = REGEX_CACHE.lock().unwrap_or_else(|e| e.into_inner());
            cache.clear();
        }
        let r1 = get_or_compile_regex("foo_cache_test").unwrap();
        let r2 = get_or_compile_regex("foo_cache_test").unwrap();
        assert!(Arc::ptr_eq(&r1, &r2));
        let cache = REGEX_CACHE.lock().unwrap_or_else(|e| e.into_inner());
        assert!(cache.contains("foo_cache_test"));
    }

    #[test]
    fn test_get_or_compile_regex_thread_safe() {
        {
            let mut cache = REGEX_CACHE.lock().unwrap_or_else(|e| e.into_inner());
            cache.clear();
        }
        let handles: Vec<_> = (0..10)
            .map(|_| std::thread::spawn(|| get_or_compile_regex("thread_safe_test").unwrap()))
            .collect();
        let results: Vec<_> = handles.into_iter().map(|h| h.join().unwrap()).collect();
        // Verify all threads got the same Arc reference (proves cache deduplication works)
        for r in &results[1..] {
            assert!(Arc::ptr_eq(&results[0], r));
        }
        // Note: We don't check cache.contains() here because in parallel test environments,
        // other tests may evict entries from the global LRU cache between thread completion
        // and our check. The Arc pointer equality above already proves thread safety.
    }
}