Update unittest attune to numpy standards

Author: parthpankajtiwary

lib/matplotlib/tests/test_scale.py

@@ -14,8 +14,6 @@
 import io
 import pytest
 
-import random
-
 
 @check_figures_equal()
 def test_log_scales(fig_test, fig_ref):
@@ -60,21 +58,17 @@ def test_symlog_mask_nan():
 def test_symlog_linthresh():
     fig, ax = plt.subplots()
 
-    n_samples = 100
-
-    upper_bound = 1.0
+    np.random.seed(19680801)
+    x = np.random.random(100)
+    y = np.random.random(100)
 
-    x = [random.uniform(0.0, upper_bound) for _ in range(n_samples)]
-    y = [random.uniform(0.0, upper_bound) for _ in range(n_samples)]
+    plt.plot(x, y, 'o')
+    ax.set_xscale('symlog')
+    ax.set_yscale('symlog')
 
-    with pytest.warns(UserWarning) as record:
-        plt.plot(x, y, 'o')
-        ax.set_xscale('symlog')
-        ax.set_yscale('symlog')
+    with pytest.warns(UserWarning):
         plt.show()
 
-    assert len(record) == 1
-
 
 @image_comparison(['logit_scales.png'], remove_text=True)
 def test_logit_scales():