test parameter substitution.

__tests__/with_params.re

@@ -0,0 +1,53 @@
+open Jest;
+
+let connect = () =>
+  MySql.Connection.make(~host="127.0.0.1", ~port=3306, ~user="root", ());
+
+type result = {result: int};
+
+describe("Test parameter interpolation", () => {
+  let conn = connect();
+  let decoder = json => {
+    open! Json.Decode;
+    {result: json |> field("result", int)};
+  };
+  describe("Standard (positional) parameters", () =>
+    testAsync("Expect parameters to be substituted properly", finish =>
+      MySql.Query.with_params(
+        conn, "SELECT 1 + ? + ? AS result", [|5, 6|], results =>
+        switch results {
+        | MySql.Response.Error(_) => fail("Unexpected exception") |> finish
+        | MySql.Response.Mutation(_) =>
+          fail("unexpected_mutation_result") |> finish
+        | MySql.Response.Select(s) =>
+          s.rows
+          |> Js.Array.map(decoder)
+          |> Js.Array.map(x => x.result)
+          |> Expect.expect
+          |> Expect.toBeSupersetOf([|12|])
+          |> finish
+        }
+      )
+    )
+  );
+  describe("Named parameters", () =>
+    testAsync("Expect parameters to be substitude properly", finish =>
+      MySql.Query.with_named_params(
+        conn, "SELECT :x + :y AS result", {"x": 1, "y": 2}, results =>
+        switch results {
+        | MySql.Response.Error(_) => fail("Unexpected exception") |> finish
+        | MySql.Response.Mutation(_) =>
+          fail("unexpected_mutation_result") |> finish
+        | MySql.Response.Select(s) =>
+          s.rows
+          |> Js.Array.map(decoder)
+          |> Js.Array.map(x => x.result)
+          |> Expect.expect
+          |> Expect.toBeSupersetOf([|3|])
+          |> finish
+        }
+      )
+    )
+  );
+  afterAll(() => MySql.Connection.close(conn));
+});