Tests for twisted.web.http_headers.
| Function | assertSanitized | Assert that the components are sanitized to the expected value as both a
header name and value, across all of Header's setters and 
getters. | 
| Class | BytesHeadersTests | Tests for Headers, 
usingbytesarguments for methods. | 
| Class | UnicodeHeadersTests | Tests for Headers, 
usingunicodearguments for methods. | 
Assert that the components are sanitized to the expected value as both a
header name and value, across all of Header's setters and 
getters.
| Parameters | testCase | A test case. | 
| components | A sequence of values that contain linear whitespace to use as header names 
and values; see textLinearWhitespaceComponentsandbytesLinearWhitespaceComponents | |
| expected | The expected sanitized form of the component for both headers names and their values. |