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'''test pycairo API
- can be expanded later as required.
- is not able to test the quality of images created. We assume cairo itself
tests for this.
'''
import tempfile as tfi
import cairo
import py.test as test
def test_context():
if cairo.HAS_IMAGE_SURFACE:
f, w, h = cairo.FORMAT_ARGB32, 100, 100
s = cairo.ImageSurface(f, w, h)
ctx = cairo.Context(s)
ctx.set_source_rgb(1.0, 1.0, 1.0)
ctx.set_operator(cairo.OPERATOR_SOURCE)
ctx.paint()
def test_matrix():
m = cairo.Matrix()
m.rotate(10)
m.scale(1.5, 2.5)
m.translate(10, 20)
def test_path():
# AttributeError: 'module' object has no attribute 'Path'
test.raises(AttributeError, "p = cairo.Path()")
# see examples/warpedtext.py
def test_pattern():
# TypeError: The Pattern type cannot be instantiated
test.raises(TypeError, "p = cairo.Pattern()")
r,g,b,a = 0.1, 0.2, 0.3, 0.4
p = cairo.SolidPattern(r,g,b,a)
assert p.get_rgba() == (r,g,b,a)
# SurfacePattern
# TypeError: The Gradient type cannot be instantiated
test.raises(TypeError, "p = cairo.Gradient()")
x0,y0,x1,y1 = 0.0, 0.0, 0.0, 1.0
p = cairo.LinearGradient(x0,y0,x1,y1)
assert p.get_linear_points() == (x0,y0,x1,y1)
p.add_color_stop_rgba(1, 0, 0, 0, 1)
p.add_color_stop_rgba(0, 1, 1, 1, 1)
cx0, cy0, radius0, cx1, cy1, radius1 = 1.0, 1.0, 1.0, 2.0, 2.0, 1.0
p = cairo.RadialGradient(cx0, cy0, radius0, cx1, cy1, radius1)
assert p.get_radial_circles() == (cx0, cy0, radius0, cx1, cy1, radius1)
p.add_color_stop_rgba(0, 1, 1, 1, 1)
p.add_color_stop_rgba(1, 0, 0, 0, 1)
def test_surface():
# TypeError: The Surface type cannot be instantiated
test.raises(TypeError, "s = cairo.Surface()")
if cairo.HAS_IMAGE_SURFACE:
f, w, h = cairo.FORMAT_ARGB32, 100, 100
s = cairo.ImageSurface(f, w, h)
assert s.get_format() == f
assert s.get_width() == w
assert s.get_height() == h
if cairo.HAS_PDF_SURFACE:
f, w, h = tfi.TemporaryFile(mode='w+b'), 100, 100
s = cairo.PDFSurface(f, w, h)
if cairo.HAS_PS_SURFACE:
f, w, h = tfi.TemporaryFile(mode='w+b'), 100, 100
s = cairo.PSSurface(f, w, h)
if cairo.HAS_SVG_SURFACE:
f, w, h = tfi.TemporaryFile(mode='w+b'), 100, 100
s = cairo.SVGSurface(f, w, h)
def test_text():
pass
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