#!/usr/bin/python
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"""Unit tests for array_stream.py."""

import pdb
import unittest

from webkitpy.common.array_stream import ArrayStream


class ArrayStreamTest(unittest.TestCase):
    def assertEmpty(self, a_stream):
        self.assertTrue(a_stream.empty())

    def assertNotEmpty(self, a_stream):
        self.assertFalse(a_stream.empty())

    def assertContentsMatch(self, a_stream, contents):
        self.assertEquals(a_stream.get(), contents)

    def test_basics(self):
        a = ArrayStream()
        self.assertEmpty(a)
        self.assertContentsMatch(a, [])

        a.flush()
        self.assertEmpty(a)
        self.assertContentsMatch(a, [])

        a.write("foo")
        a.write("bar")
        self.assertNotEmpty(a)
        self.assertContentsMatch(a, ["foo", "bar"])

        a.flush()
        self.assertNotEmpty(a)
        self.assertContentsMatch(a, ["foo", "bar"])

        a.reset()
        self.assertEmpty(a)
        self.assertContentsMatch(a, [])

        self.assertEquals(str(a), "<ArrayStream: []>")

        a.write("foo")
        self.assertNotEmpty(a)
        self.assertContentsMatch(a, ["foo"])
        self.assertEquals(str(a), "<ArrayStream: ['foo']>")

if __name__ == '__main__':
    unittest.main()