rafa/test/unit/core/RingBuffer-configure.js

Rafa.js is a Javascript framework for building concurrent applications.

module.exports = (assert, Rafa) => {
  suite("configure", () => {
    test("throw error when capacity < length", () => {
      var buffer = Rafa.buffer(2);
      buffer.push(1);
      buffer.push(2);
      assert.throws(() => buffer.configure(1));
    });

    test("grow when start is 0", () => {
      var buffer = Rafa.buffer(2);
      buffer.push(1);
      buffer.configure(3);
      assert.equal(buffer.capacity, 3);
      assert.equal(buffer.length, 1);
      assert.ok(buffer.overwrite);
      assert.equal(buffer.buffer[0], 1);
    });

    test("grow when start is upper bound", () => {
      var buffer = Rafa.buffer(2);
      buffer.push(1);
      buffer.push(2);
      buffer.shift();
      buffer.configure(3);
      assert.equal(buffer.capacity, 3);
      assert.equal(buffer.length, 1);
      assert.ok(buffer.overwrite);
      assert.equal(buffer.buffer[0], 2);
    });
    
    test("shrink", () => {
      var buffer = Rafa.buffer(2);
      buffer.push(1);
      buffer.configure(1);
      assert.equal(buffer.capacity, 1);
      assert.equal(buffer.length, 1);
      assert.ok(buffer.overwrite);
      assert.equal(buffer.buffer[0], 1);
    });
  });
};