Add scipy.fft step to azure

azure-pipelines.yml

@@ -2,6 +2,7 @@ variables:
   CIBW_TEST_COMMAND: "pip install -r {project}/requirements/tests.txt && pytest --pyargs uarray"
   CIBW_BUILD: cp3?-*
   CIBW_SKIP: cp34-*
+  PRE_WHEELS: "https://7933911d6844c6c53a7d-47bd50c35cd79bd838daf386af554a83.ssl.cf2.rackcdn.com"
 
 jobs:
 - job: Linux
@@ -24,6 +25,11 @@ jobs:
     vmImage: 'ubuntu-16.04'
   steps:
     - template: ci/azure-doc-lint-cov.yml
+- job: SciPy_FFT_Linux
+  pool:
+    vmImage: 'ubuntu-16.04'
+  steps:
+    - template: ci/azure-test-scipy-fft.yml
 
 
 trigger:
@@ -35,4 +41,4 @@ trigger:
     - '*'
 
 pr:
-- master
+- master

ci/azure-test-scipy-fft.yml

@@ -0,0 +1,14 @@
+steps:
+- {task: UsePythonVersion@0, inputs: {versionSpec: '3.5'}}
+- bash: |
+    python -m pip install --pre --upgrade -f $PRE_WHEELS scipy
+    python -m pip install pytest
+    python -m pip install .
+  displayName: Install dependencies
+- task: PythonScript@0
+  inputs:
+    scriptSource: inline
+    script: |
+      import scipy.fft
+      assert scipy.fft.test()
+  displayName: Test scipy.fft