1 files changed, 89 insertions, 0 deletions
diff --git a/testing/mozharness/test/test_base_diskutils.py b/testing/mozharness/test/test_base_diskutils.py
new file mode 100644
index 0000000000..9c5ac59083
--- /dev/null
+++ b/testing/mozharness/test/test_base_diskutils.py
@@ -0,0 +1,89 @@
+import unittest
+from unittest import mock
+
+from mozharness.base.diskutils import DiskInfo, DiskSize, DiskutilsError, convert_to
+
+
+class TestDiskutils(unittest.TestCase):
+    def test_convert_to(self):
+        # 0 is 0 regardless from_unit/to_unit
+        self.assertTrue(convert_to(size=0, from_unit="GB", to_unit="MB") == 0)
+        size = 524288  # 512 * 1024
+        # converting from/to same unit
+        self.assertTrue(convert_to(size=size, from_unit="MB", to_unit="MB") == size)
+
+        self.assertTrue(convert_to(size=size, from_unit="MB", to_unit="GB") == 512)
+
+        self.assertRaises(
+            DiskutilsError,
+            lambda: convert_to(size="a string", from_unit="MB", to_unit="MB"),
+        )
+        self.assertRaises(
+            DiskutilsError, lambda: convert_to(size=0, from_unit="foo", to_unit="MB")
+        )
+        self.assertRaises(
+            DiskutilsError, lambda: convert_to(size=0, from_unit="MB", to_unit="foo")
+        )
+
+
+class TestDiskInfo(unittest.TestCase):
+    def testDiskinfo_to(self):
+        di = DiskInfo()
+        self.assertTrue(di.unit == "bytes")
+        self.assertTrue(di.free == 0)
+        self.assertTrue(di.used == 0)
+        self.assertTrue(di.total == 0)
+        # convert to GB
+        di._to("GB")
+        self.assertTrue(di.unit == "GB")
+        self.assertTrue(di.free == 0)
+        self.assertTrue(di.used == 0)
+        self.assertTrue(di.total == 0)
+
+
+class MockStatvfs(object):
+    def __init__(self):
+        self.f_bsize = 0
+        self.f_frsize = 0
+        self.f_blocks = 0
+        self.f_bfree = 0
+        self.f_bavail = 0
+        self.f_files = 0
+        self.f_ffree = 0
+        self.f_favail = 0
+        self.f_flag = 0
+        self.f_namemax = 0
+
+
+class TestDiskSpace(unittest.TestCase):
+    @mock.patch("mozharness.base.diskutils.os")
+    def testDiskSpacePosix(self, mock_os):
+        ds = MockStatvfs()
+        mock_os.statvfs.return_value = ds
+        di = DiskSize()._posix_size("/")
+        self.assertTrue(di.unit == "bytes")
+        self.assertTrue(di.free == 0)
+        self.assertTrue(di.used == 0)
+        self.assertTrue(di.total == 0)
+
+    @mock.patch("mozharness.base.diskutils.ctypes")
+    def testDiskSpaceWindows(self, mock_ctypes):
+        mock_ctypes.windll.kernel32.GetDiskFreeSpaceExA.return_value = 0
+        mock_ctypes.windll.kernel32.GetDiskFreeSpaceExW.return_value = 0
+        di = DiskSize()._windows_size("/c/")
+        self.assertTrue(di.unit == "bytes")
+        self.assertTrue(di.free == 0)
+        self.assertTrue(di.used == 0)
+        self.assertTrue(di.total == 0)
+
+    @mock.patch("mozharness.base.diskutils.os")
+    @mock.patch("mozharness.base.diskutils.ctypes")
+    def testUnspportedPlafrom(self, mock_ctypes, mock_os):
+        mock_os.statvfs.side_effect = AttributeError("")
+        self.assertRaises(AttributeError, lambda: DiskSize()._posix_size("/"))
+        mock_ctypes.windll.kernel32.GetDiskFreeSpaceExW.side_effect = AttributeError("")
+        mock_ctypes.windll.kernel32.GetDiskFreeSpaceExA.side_effect = AttributeError("")
+        self.assertRaises(AttributeError, lambda: DiskSize()._windows_size("/"))
+        self.assertRaises(
+            DiskutilsError, lambda: DiskSize().get_size(path="/", unit="GB")
+        )