Create a branch for io work in NumPy

1 files changed, 51 insertions, 0 deletions

diff --git a/tests/test_index_tricks.py b/tests/test_index_tricks.py
new file mode 100644
index 000000000..8fc192202
--- /dev/null
+++ b/tests/test_index_tricks.py
@@ -0,0 +1,51 @@
+from numpy.testing import *
+set_package_path()
+from numpy import array, ones, r_, mgrid
+restore_path()
+
+class TestGrid(NumpyTestCase):
+    def check_basic(self):
+        a = mgrid[-1:1:10j]
+        b = mgrid[-1:1:0.1]
+        assert(a.shape == (10,))
+        assert(b.shape == (20,))
+        assert(a[0] == -1)
+        assert_almost_equal(a[-1],1)
+        assert(b[0] == -1)
+        assert_almost_equal(b[1]-b[0],0.1,11)
+        assert_almost_equal(b[-1],b[0]+19*0.1,11)
+        assert_almost_equal(a[1]-a[0],2.0/9.0,11)
+
+    def check_nd(self):
+        c = mgrid[-1:1:10j,-2:2:10j]
+        d = mgrid[-1:1:0.1,-2:2:0.2]
+        assert(c.shape == (2,10,10))
+        assert(d.shape == (2,20,20))
+        assert_array_equal(c[0][0,:],-ones(10,'d'))
+        assert_array_equal(c[1][:,0],-2*ones(10,'d'))
+        assert_array_almost_equal(c[0][-1,:],ones(10,'d'),11)
+        assert_array_almost_equal(c[1][:,-1],2*ones(10,'d'),11)
+        assert_array_almost_equal(d[0,1,:]-d[0,0,:], 0.1*ones(20,'d'),11)
+        assert_array_almost_equal(d[1,:,1]-d[1,:,0], 0.2*ones(20,'d'),11)
+
+class TestConcatenator(NumpyTestCase):
+    def check_1d(self):
+        assert_array_equal(r_[1,2,3,4,5,6],array([1,2,3,4,5,6]))
+        b = ones(5)
+        c = r_[b,0,0,b]
+        assert_array_equal(c,[1,1,1,1,1,0,0,1,1,1,1,1])
+
+    def check_2d(self):
+        b = rand(5,5)
+        c = rand(5,5)
+        d = r_['1',b,c]  # append columns
+        assert(d.shape == (5,10))
+        assert_array_equal(d[:,:5],b)
+        assert_array_equal(d[:,5:],c)
+        d = r_[b,c]
+        assert(d.shape == (10,5))
+        assert_array_equal(d[:5,:],b)
+        assert_array_equal(d[5:,:],c)
+
+if __name__ == "__main__":
+    NumpyTest().run()