sqlite 0.37.0

The package provides an interface to SQLite.
Documentation 
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use std::collections::HashMap;

use sqlite::{Type, Value};

mod common;

use common::{setup_english, setup_users};

macro_rules! ok(($result:expr) => ($result.unwrap()));

#[test]
fn bind_iter() {
    let connection = ok!(sqlite::open(":memory:"));
    ok!(connection.execute("CREATE TABLE users (id INTEGER, name STRING)"));
    let mut statement = ok!(connection.prepare("INSERT INTO users VALUES (:id, :name)"));

    let mut map = HashMap::<_, Value>::new();
    map.insert(":name", "Bob".to_string().into());
    map.insert(":id", 42.into());

    let mut cursor = ok!(statement.iter().bind_iter(map));
    assert!(cursor.next().is_none());
}

#[test]
fn iter() {
    let connection = setup_users(":memory:");
    ok!(connection.execute("INSERT INTO users VALUES (2, 'Bob', NULL, NULL, NULL)"));
    let query = "SELECT id, age FROM users ORDER BY 1 DESC";
    let mut statement = ok!(connection.prepare(query));

    let mut count = 0;
    for row in statement.iter().map(|row| ok!(row)) {
        let id = row.read::<i64, _>("id");
        if id == 1 {
            assert_eq!(row.read::<f64, _>("age"), 42.69);
        } else if id == 2 {
            assert_eq!(row.read::<Option<f64>, _>("age"), None);
        } else {
            assert!(false);
        }
        count += 1;
    }
    assert_eq!(count, 2);
}

#[test]
fn iter_column_count() {
    let connection = setup_english(":memory:");
    let query = "SELECT value FROM english WHERE value LIKE '%type'";
    let mut statement = ok!(connection.prepare(query));

    let cursor = statement.iter();
    assert_eq!(cursor.column_count(), 1);
}

#[test]
fn iter_column_type() {
    let connection = setup_english(":memory:");
    let query = "SELECT value FROM english WHERE value LIKE '%type'";
    let mut statement = ok!(connection.prepare(query));

    let cursor = statement.iter();
    assert_eq!(ok!(cursor.column_type(0)), Type::Null);
    assert_eq!(ok!(cursor.column_type("value")), Type::Null);

    ok!(statement.reset());
    let mut cursor = statement.iter();
    ok!(cursor.try_next());
    assert_eq!(ok!(cursor.column_type(0)), Type::String);
    assert_eq!(ok!(cursor.column_type("value")), Type::String);

    ok!(statement.reset());
    let mut count = 0;
    let mut cursor = statement.iter();
    while let Ok(Some(_)) = cursor.try_next() {
        assert_eq!(ok!(cursor.column_type(0)), Type::String);
        assert_eq!(ok!(cursor.column_type("value")), Type::String);
        count += 1;
    }
    assert_eq!(count, 6);
}

#[test]
fn iter_count() {
    let connection = setup_english(":memory:");
    let query = "SELECT value FROM english WHERE value LIKE '%type'";
    let mut statement = ok!(connection.prepare(query));

    assert_eq!(statement.iter().filter(|row| row.is_ok()).count(), 6);
}

#[test]
fn iter_with_exception() {
    let connection = ok!(sqlite::open(":memory:"));
    ok!(connection.execute("CREATE TABLE foo(x)"));
    ok!(connection
        .execute("CREATE TRIGGER bar BEFORE INSERT ON foo BEGIN SELECT RAISE(FAIL, 'buz'); END"));
    let mut statement = ok!(connection.prepare("INSERT INTO foo VALUES (0) RETURNING rowid;"));
    let results = statement.iter().collect::<Vec<_>>();
    assert_eq!(results.len(), 1);
    assert!(matches!(results[0], Err(_)));
}

#[test]
fn workflow() {
    let connection = setup_users(":memory:");

    let select = "SELECT id, name FROM users WHERE id = ?";
    let mut select = ok!(connection.prepare(select));
    let mut select = select.iter();

    let insert = "INSERT INTO users (id, name) VALUES (?, ?)";
    let mut insert = ok!(connection.prepare(insert));
    let insert = insert.iter();

    for _ in 0..10 {
        select = ok!(select.bind((1, 1)));
        let row = ok!(ok!(select.next()));
        assert_eq!(row.read::<i64, _>("id"), 1);
        assert_eq!(row.read::<&str, _>("name"), "Alice");
        assert!(select.next().is_none());
    }

    let mut select = ok!(select.bind((1, 42)));
    assert!(select.next().is_none());

    let mut insert = ok!(insert.bind::<&[Value]>(&[42.into(), String::from("Bob").into()][..]));
    assert!(insert.next().is_none());

    let mut select = ok!(select.bind((1, 42)));
    let row = ok!(ok!(select.next()));
    assert_eq!(row.read::<i64, _>("id"), 42);
    assert_eq!(row.read::<&str, _>("name"), "Bob");
    assert!(select.next().is_none());
}