TST: atleast_nd: full tests

pyproject.toml

@@ -33,11 +33,13 @@ test = [
     "pytest >=6",
     "pytest-cov >=3",
     "array-api-strict",
+    "numpy",
 ]
 dev = [
     "pytest >=6",
     "pytest-cov >=3",
     "array-api-strict",
+    "numpy",
     "pylint",
 ]
 docs = [
@@ -84,6 +86,7 @@ lint = { depends-on = ["pre-commit", "pylint"] }
 pytest = ">=6"
 pytest-cov = ">=3"
 array-api-strict = "*"
+numpy = "*"
 
 [tool.pixi.feature.test.tasks]
 test = { cmd = "pytest" }
@@ -92,6 +95,8 @@ test-ci = { cmd = "pytest -ra --cov --cov-report=xml --cov-report=term --duratio
 [tool.pixi.feature.dev.dependencies]
 pytest = ">=6"
 pytest-cov = ">=3"
+array-api-strict = "*"
+numpy = "*"
 pylint = "*"
 
 [tool.pixi.feature.docs.dependencies]
@@ -155,6 +160,7 @@ enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
 warn_unreachable = true
 disallow_untyped_defs = false
 disallow_incomplete_defs = false
+ignore_missing_imports = true
 
 [[tool.mypy.overrides]]
 module = "array_api_extra.*"

tests/test_funcs.py

@@ -1,12 +1,68 @@
 from __future__ import annotations
 
-import array_api_strict as xp  # type: ignore[import-not-found]
+import array_api_strict as xp
+from numpy.testing import assert_array_equal
 
 from array_api_extra import atleast_nd
 
 
 class TestAtLeastND:
-    def test_1d_to_2d(self):
+    def test_0D(self):
+        x = xp.asarray(1)
+
+        y = atleast_nd(x, ndim=0, xp=xp)
+        assert_array_equal(y, x)
+
+        y = atleast_nd(x, ndim=1, xp=xp)
+        assert_array_equal(y, xp.ones((1,)))
+
+        y = atleast_nd(x, ndim=5, xp=xp)
+        assert_array_equal(y, xp.ones((1, 1, 1, 1, 1)))
+
+    def test_1D(self):
         x = xp.asarray([0, 1])
+
+        y = atleast_nd(x, ndim=0, xp=xp)
+        assert_array_equal(y, x)
+
+        y = atleast_nd(x, ndim=1, xp=xp)
+        assert_array_equal(y, x)
+
+        y = atleast_nd(x, ndim=2, xp=xp)
+        assert_array_equal(y, xp.asarray([[0, 1]]))
+
+        y = atleast_nd(x, ndim=5, xp=xp)
+        assert_array_equal(y, xp.reshape(xp.arange(2), (1, 1, 1, 1, 2)))
+
+    def test_2D(self):
+        x = xp.asarray([[3]])
+
+        y = atleast_nd(x, ndim=0, xp=xp)
+        assert_array_equal(y, x)
+
         y = atleast_nd(x, ndim=2, xp=xp)
-        assert y.ndim == 2
+        assert_array_equal(y, x)
+
+        y = atleast_nd(x, ndim=3, xp=xp)
+        assert_array_equal(y, 3 * xp.ones((1, 1, 1)))
+
+        y = atleast_nd(x, ndim=5, xp=xp)
+        assert_array_equal(y, 3 * xp.ones((1, 1, 1, 1, 1)))
+
+    def test_5D(self):
+        x = xp.ones((1, 1, 1, 1, 1))
+
+        y = atleast_nd(x, ndim=0, xp=xp)
+        assert_array_equal(y, x)
+
+        y = atleast_nd(x, ndim=4, xp=xp)
+        assert_array_equal(y, x)
+
+        y = atleast_nd(x, ndim=5, xp=xp)
+        assert_array_equal(y, x)
+
+        y = atleast_nd(x, ndim=6, xp=xp)
+        assert_array_equal(y, xp.ones((1, 1, 1, 1, 1, 1)))
+
+        y = atleast_nd(x, ndim=9, xp=xp)
+        assert_array_equal(y, xp.ones((1, 1, 1, 1, 1, 1, 1, 1, 1)))