added test cases

tests/2d/scipy/integrate.py

@@ -0,0 +1,29 @@
+import sys
+from math import *
+
+# this test is meaningful only if ulab is compiled with ulab.scipy.integrate
+# we're not going to test CPython scipy. 
+try:
+    from ulab import scipy
+except Exception as e:
+    print ("could not import ulab.scipy: ", e)
+    sys.exit(1) 
+
+i = scipy.integrate
+try:
+    if str(type(i)) != "<class 'module'>":
+        print ("scipy.integrate is not available")
+        sys.exit(1)
+except Exception as e:         
+    print ("scipy.integrate is not available")
+    sys.exit(1)
+
+f = lambda x: x * sin(x) * exp(x)
+a=1
+b=2
+# what if they are not all available? 
+algorithms = ( i.quad, i.romberg, i.simpson, i.quadgk )
+for quad in algorithms:
+	    print (quad(f, a, b))
+
+

tests/2d/scipy/integrate.py.exp

@@ -0,0 +1,4 @@
+(7.11263821415851, 5.438231077315757e-14)
+7.112638214158507
+7.112638214158494
+(7.112638214158507, 7.686723611780195e-14)