public void When_binding_function_to_a_closed_connection()
{
using (var conn = new SQLiteInMemoryConnection())
{
var func = new SQLiteScalarFunction("Foo", 1, args => null);
Should.Throw <InvalidOperationException>(() => conn.BindFunction(func))
.Message.ShouldBe("Cannot bind a function to a closed.");
}
}
public async Task When_binding_a_collation_function_to_an_opened_connection_table()
{
using (var conn = new SQLiteInMemoryConnection())
{
conn.Open();
Func <string, string, int> compare = (one, two) => 1;
conn.BindFunction(new SQLiteCollationFunction("FunkyCompare", compare));
await conn.ExecuteAsync("CREATE TABLE Numbers(No TEXT NOT NULL COLLATE FunkyCompare);");
await conn.ExecuteAsync("INSERT INTO Numbers VALUES (1), (2), (3), (4);");
var defaultCollation = await conn.QueryAsync <string>("SELECT No FROM Numbers ORDER BY No ASC;");
defaultCollation.ShouldBe(new[] { "4", "3", "2", "1" });
}
}
public async Task When_binding_a_scalar_function_to_an_opened_connection()
{
using (var conn = new SQLiteInMemoryConnection())
{
string receivedArg = null;
var func = new SQLiteScalarFunction("Funky", 1, args =>
{
receivedArg = args[0].ToString();
return("bar");
});
conn.Open();
conn.BindFunction(func);
var foo = (await conn.QueryAsync <string>("SELECT \"foo\"")).First();
foo.ShouldBe("foo");
var bar = (await conn.QueryAsync <string>("SELECT Funky(\"foo\")")).First();
bar.ShouldBe("bar");
receivedArg.ShouldBe("foo");
}
}
public async Task When_binding_an_aggregate_function_to_an_opened_connection()
{
using (var conn = new SQLiteInMemoryConnection())
{
conn.Open();
await conn.ExecuteAsync("CREATE TABLE Numbers(No INTEGER NOT NULL);");
await conn.ExecuteAsync("INSERT INTO Numbers VALUES (1), (2), (3), (4);");
const int InitState = 0;
Func <object[], int, object, object> step = (objects, i, state) =>
{
var newNo = Convert.ToInt32(objects[0]);
return((int)state + newNo);
};
Func <object, object> final = finalState => finalState;
conn.BindFunction(new SQLiteAggregateFunction("FunkySum", 1, InitState, step, final));
var funkySum = await conn.ExecuteScalarAsync <long>("SELECT FunkySum(No) FROM Numbers;");
funkySum.ShouldBe(10);
}
}
