Utilise RST conversion of spec, generate runtime special cases tests

.github/workflows/numpy.yml

@@ -11,7 +11,10 @@ jobs:
         python-version: [3.8, 3.9]
 
     steps:
-    - uses: actions/checkout@v1
+    - name: Checkout array-api-tests
+      uses: actions/checkout@v1
+      with:
+        submodules: 'true'
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v1
       with:
@@ -40,6 +43,30 @@ jobs:
         # waiting on NumPy to allow/revert distinct NaNs for np.unique
         # https://github.com/numpy/numpy/issues/20326#issuecomment-1012380448
         array_api_tests/test_set_functions.py
+        # https://github.com/numpy/numpy/issues/21211
+        array_api_tests/test_special_cases.py::test_iop[__iadd__(x1_i is -0 and x2_i is -0) -> -0]
+        # https://github.com/numpy/numpy/issues/21213
+        array_api_tests/test_special_cases.py::test_iop[__ipow__(x1_i is -infinity and x2_i > 0 and not (x2_i.is_integer() and x2_i % 2 == 1)) -> +infinity]
+        array_api_tests/test_special_cases.py::test_iop[__ipow__(x1_i is -0 and x2_i > 0 and not (x2_i.is_integer() and x2_i % 2 == 1)) -> +0]
+        # noted diversions from spec
+        array_api_tests/test_special_cases.py::test_binary[floor_divide(x1_i is +infinity and isfinite(x2_i) and x2_i > 0) -> +infinity]
+        array_api_tests/test_special_cases.py::test_binary[floor_divide(x1_i is +infinity and isfinite(x2_i) and x2_i < 0) -> -infinity]
+        array_api_tests/test_special_cases.py::test_binary[floor_divide(x1_i is -infinity and isfinite(x2_i) and x2_i > 0) -> -infinity]
+        array_api_tests/test_special_cases.py::test_binary[floor_divide(x1_i is -infinity and isfinite(x2_i) and x2_i < 0) -> +infinity]
+        array_api_tests/test_special_cases.py::test_binary[floor_divide(isfinite(x1_i) and x1_i > 0 and x2_i is -infinity) -> -0]
+        array_api_tests/test_special_cases.py::test_binary[floor_divide(isfinite(x1_i) and x1_i < 0 and x2_i is +infinity) -> -0]
+        array_api_tests/test_special_cases.py::test_binary[__floordiv__(x1_i is +infinity and isfinite(x2_i) and x2_i > 0) -> +infinity]
+        array_api_tests/test_special_cases.py::test_binary[__floordiv__(x1_i is +infinity and isfinite(x2_i) and x2_i < 0) -> -infinity]
+        array_api_tests/test_special_cases.py::test_binary[__floordiv__(x1_i is -infinity and isfinite(x2_i) and x2_i > 0) -> -infinity]
+        array_api_tests/test_special_cases.py::test_binary[__floordiv__(x1_i is -infinity and isfinite(x2_i) and x2_i < 0) -> +infinity]
+        array_api_tests/test_special_cases.py::test_binary[__floordiv__(isfinite(x1_i) and x1_i > 0 and x2_i is -infinity) -> -0]
+        array_api_tests/test_special_cases.py::test_binary[__floordiv__(isfinite(x1_i) and x1_i < 0 and x2_i is +infinity) -> -0]
+        array_api_tests/test_special_cases.py::test_iop[__ifloordiv__(x1_i is +infinity and isfinite(x2_i) and x2_i > 0) -> +infinity]
+        array_api_tests/test_special_cases.py::test_iop[__ifloordiv__(x1_i is +infinity and isfinite(x2_i) and x2_i < 0) -> -infinity]
+        array_api_tests/test_special_cases.py::test_iop[__ifloordiv__(x1_i is -infinity and isfinite(x2_i) and x2_i > 0) -> -infinity]
+        array_api_tests/test_special_cases.py::test_iop[__ifloordiv__(x1_i is -infinity and isfinite(x2_i) and x2_i < 0) -> +infinity]
+        array_api_tests/test_special_cases.py::test_iop[__ifloordiv__(isfinite(x1_i) and x1_i > 0 and x2_i is -infinity) -> -0]
+        array_api_tests/test_special_cases.py::test_iop[__ifloordiv__(isfinite(x1_i) and x1_i < 0 and x2_i is +infinity) -> -0]
 
         EOF
 

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "array_api_tests/array-api"]
+	path = array-api
+	url = https://github.com/data-apis/array-api/

README.md

@@ -10,6 +10,15 @@ welcome!
 
 ### Setup
 
+Currently we pin the Array API specification repo [`array-api`](https://github.com/data-apis/array-api/)
+as a git submodule. This might change in the future to better support vendoring
+use cases (see [#107](https://github.com/data-apis/array-api-tests/issues/107)),
+but for now be sure submodules are pulled too, e.g.
+
+```bash
+$ git submodule update --init
+```
+
 To run the tests, install the testing dependencies.
 
 ```bash

array_api_tests/meta/test_special_cases.py

@@ -0,0 +1,10 @@
+import math
+
+from ..test_special_cases import parse_result
+
+
+def test_parse_result():
+    check_result, _ = parse_result(
+        "an implementation-dependent approximation to ``+3π/4``"
+    )
+    assert check_result(3 * math.pi / 4)