From ac05808f46f170348261c451758474cd8cf1efbe Mon Sep 17 00:00:00 2001
From: Kaushik Kulkarni <kaushikcfd@gmail.com>
Date: Tue, 9 May 2023 10:09:31 -0500
Subject: [PATCH] test apply_distributive_property_to_einsums

flake8: disable N806 for test_linalg

Using capital letters for matrices is common
---
 setup.cfg           |   1 +
 test/test_linalg.py | 121 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 122 insertions(+)
 create mode 100644 test/test_linalg.py

diff --git a/setup.cfg b/setup.cfg
index 22434cf..514063d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -8,6 +8,7 @@ multiline-quotes = """
 
 per-file-ignores =
     examples/advection.py:B023
+    test/test_linalg.py:N806
 
 # enable-flake8-bugbear
 
diff --git a/test/test_linalg.py b/test/test_linalg.py
new file mode 100644
index 0000000..0dafffa
--- /dev/null
+++ b/test/test_linalg.py
@@ -0,0 +1,121 @@
+#!/usr/bin/env python
+
+__copyright__ = """
+Copyright (C) 2023 Kaushik Kulkarni
+"""
+
+__license__ = """
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+"""
+
+import sys
+import numpy as np
+import pytato as pt
+from pyopencl.tools import (  # noqa: F401
+        pytest_generate_tests_for_pyopencl as pytest_generate_tests)
+
+
+def test_apply_einsum_distributive_law_0():
+    from pytato.transform.einsum_distributive_law import (
+        EinsumDistributiveLawDescriptor,
+        DoDistribute, DoNotDistribute,
+        apply_distributive_property_to_einsums,
+    )
+
+    def how_to_distribute(
+            expr: pt.Einsum) -> EinsumDistributiveLawDescriptor:
+        if pt.analysis.is_einsum_similar_to_subscript(
+                expr, "ij,j->i"):
+            return DoDistribute(ioperand=1)
+        else:
+            return DoNotDistribute()
+
+    x1 = pt.make_placeholder("x1", 4, np.float64)
+    x2 = pt.make_placeholder("x2", 4, np.float64)
+    A1 = pt.make_placeholder("A1", (10, 4), np.float64)
+    A2 = pt.make_placeholder("A2", (10, 4), np.float64)
+    y = (7*A1 + 8*A2) @ (2*x1-3*x2)
+    y_transformed = apply_distributive_property_to_einsums(y, how_to_distribute)
+
+    assert y_transformed == ((2 * ((7*A1 + 8*A2) @ x1) - 3 * ((7*A1 + 8*A2) @
+                                                              x2)))
+
+
+def test_apply_einsum_distributive_law_1():
+    from pytato.transform.einsum_distributive_law import (
+        EinsumDistributiveLawDescriptor,
+        DoDistribute, DoNotDistribute,
+        apply_distributive_property_to_einsums,
+    )
+
+    def how_to_distribute(
+            expr: pt.Einsum) -> EinsumDistributiveLawDescriptor:
+        if pt.analysis.is_einsum_similar_to_subscript(
+                expr, "ij,j->i"):
+            return DoDistribute(ioperand=0)
+        else:
+            return DoNotDistribute()
+
+    x1 = pt.make_placeholder("x1", 4, np.float64)
+    x2 = pt.make_placeholder("x2", 4, np.float64)
+    A1 = pt.make_placeholder("A1", (10, 4), np.float64)
+    A2 = pt.make_placeholder("A2", (10, 4), np.float64)
+    y = (7*A1 + 8*pt.sin(A2)) @ (2*x1-3*x2)
+    y_transformed = apply_distributive_property_to_einsums(y, how_to_distribute)
+    print(y_transformed)
+    assert y_transformed == (7 * (A1 @ (2*x1-3*x2)) + 8 * (pt.sin(A2) @ (2*x1-3*x2)))
+
+
+def test_apply_einsum_distributive_law_2():
+    from pytato.transform.einsum_distributive_law import (
+        EinsumDistributiveLawDescriptor,
+        DoDistribute, DoNotDistribute,
+        apply_distributive_property_to_einsums,
+    )
+
+    def how_to_distribute(
+            expr: pt.Einsum) -> EinsumDistributiveLawDescriptor:
+        if (pt.analysis.is_einsum_similar_to_subscript(
+                expr, "ij,j->i") and
+                pt.utils.are_shape_components_equal(expr.args[1].shape[0],
+                                                    10)):
+            return DoDistribute(ioperand=1)
+        else:
+            return DoNotDistribute()
+
+    x1 = pt.make_placeholder("x1", 4, np.float64)
+    x2 = pt.make_placeholder("x2", 4, np.float64)
+    A1 = pt.make_placeholder("A1", (10, 10), np.float64)
+    A2 = pt.make_placeholder("A2", (10, 10), np.float64)
+    B = pt.make_placeholder("B", (10, 4), np.float64)
+    y = (7*A1 + 8*A2) @ (2*(B@x1)-3*(B@x2))
+    y_transformed = apply_distributive_property_to_einsums(y, how_to_distribute)
+
+    assert y_transformed == (2 * ((7*A1 + 8*A2) @ (B@x1))
+                             - 3 * ((7*A1 + 8*A2) @ (B@x2)))
+
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1:
+        exec(sys.argv[1])
+    else:
+        from pytest import main
+        main([__file__])
+
+# vim: fdm=marker
-- 
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