From 51c0d699f95cfa660c678fd6ce3d5011f9f12ffb Mon Sep 17 00:00:00 2001
From: Adam Lugowski <alugowski@gmail.com>
Date: Wed, 30 Aug 2023 20:21:46 -0700
Subject: [PATCH] Add expression tests

---
 tests/test_graphblas.py | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/tests/test_graphblas.py b/tests/test_graphblas.py
index ed880c3..075360b 100644
--- a/tests/test_graphblas.py
+++ b/tests/test_graphblas.py
@@ -4,7 +4,7 @@
 
 import unittest
 
-from matrepr import to_html, to_latex
+from matrepr import to_html, to_latex, to_str
 import matrepr
 
 from .test_scipy import generate_fixed_value
@@ -13,7 +13,7 @@
     import graphblas as gb
 
     # Context initialization must happen before any other imports
-    gb.init("suitesparse", blocking=True)
+    gb.init("suitesparse", blocking=False)
 
     have_gb = True
 except ImportError:
@@ -24,8 +24,10 @@
 @unittest.skipIf(not have_gb, "python-graphblas not installed")
 class GraphBLASMatrixTests(unittest.TestCase):
     def setUp(self):
+        mat = gb.Matrix.from_coo([0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4], nrows=5, ncols=5)
         self.mats = [
-            gb.Matrix.from_coo([0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4], nrows=5, ncols=5),
+            mat,
+            mat @ mat,  # an expression class
         ]
 
     def test_no_crash(self):
@@ -36,6 +38,9 @@ def test_no_crash(self):
             res = to_latex(mat, title=True)
             self.assertGreater(len(res), 10)
 
+            res = to_str(mat, title=True)
+            self.assertGreater(len(res), 10)
+
     def test_shape(self):
         mat = gb.Matrix.from_coo([0, 1, 2, 3, 4], [0, 0, 0, 0, 0], [0, 1, 2, 3, 4], nrows=5, ncols=1)
         adapter = matrepr._get_adapter(mat, None)
@@ -68,8 +73,10 @@ def test_truncate(self):
 @unittest.skipIf(not have_gb, "python-graphblas not installed")
 class GraphBLASVectorTests(unittest.TestCase):
     def setUp(self):
+        vec = gb.Vector.from_coo([0, 3, 4, 6], [12.1, -5.4, 2.9, 2.2], size=8)
         self.vecs = [
-            gb.Vector.from_coo([0, 3, 4, 6], [12.1, -5.4, 2.9, 2.2], size=8)
+            vec,
+            vec + vec,  # an expression
         ]
 
     def test_no_crash(self):
@@ -80,6 +87,9 @@ def test_no_crash(self):
             res = to_latex(vec, title=True)
             self.assertGreater(len(res), 10)
 
+            res = to_str(vec, title=True)
+            self.assertGreater(len(res), 10)
+
     def test_shape(self):
         vec = gb.Vector.from_coo([0, 3, 4, 6], [12.1, -5.4, 2.9, 2.2], size=8)
         adapter = matrepr._get_adapter(vec, None)