Convert the pprint test to use PyUnit.

Lib/test/test_pprint.py

-from test_support import verify
 import pprint
-
-# Verify that .isrecursive() and .isreadable() work.
-
-a = range(100)
-b = range(200)
-a[-12] = b
-
-for safe in 2, 2.0, 2j, "abc", [3], (2,2), {3: 3}, u"yaddayadda", a, b:
-    verify(pprint.isrecursive(safe) == 0, "expected isrecursive == 0")
-    verify(pprint.isreadable(safe) == 1,  "expected isreadable == 1")
-
-# Tie a knot.
-b[67] = a
-# Messy dict.
-d = {}
-d[0] = d[1] = d[2] = d
-
-for icky in a, b, d, (d, d):
-    verify(pprint.isrecursive(icky) == 1, "expected isrecursive == 1")
-    verify(pprint.isreadable(icky) == 0,  "expected isreadable == 0")
-
-# Break the cycles.
-d.clear()
-del a[:]
-del b[:]
-
-for safe in a, b, d, (d, d):
-    verify(pprint.isrecursive(safe) == 0, "expected isrecursive == 0")
-    verify(pprint.isreadable(safe) == 1,  "expected isreadable == 1")
-
-# Not recursive but not readable anyway.
-for unreadable in type(3), pprint, pprint.isrecursive:
-    verify(pprint.isrecursive(unreadable) == 0, "expected isrecursive == 0")
-    verify(pprint.isreadable(unreadable) ==0,  "expected isreadable == 0")
+import unittest
+
+import test_support
+
+
+class QueryTestCase(unittest.TestCase):
+
+    def setUp(self):
+        self.a = range(100)
+        self.b = range(200)
+        self.a[-12] = self.b
+
+    def test_basic(self):
+        # Verify that .isrecursive() and .isreadable() work.
+        verify = self.assert_
+        for safe in (2, 2.0, 2j, "abc", [3], (2,2), {3: 3}, u"yaddayadda",
+                     self.a, self.b):
+            verify(not pprint.isrecursive(safe),
+                   "expected not isrecursive for " + `safe`)
+            verify(pprint.isreadable(safe),
+                   "expected isreadable for " + `safe`)
+
+    def test_knotted(self):
+        # Tie a knot.
+        self.b[67] = self.a
+        # Messy dict.
+        self.d = {}
+        self.d[0] = self.d[1] = self.d[2] = self.d
+
+        verify = self.assert_
+
+        for icky in self.a, self.b, self.d, (self.d, self.d):
+            verify(pprint.isrecursive(icky), "expected isrecursive")
+            verify(not pprint.isreadable(icky),  "expected not isreadable")
+
+        # Break the cycles.
+        self.d.clear()
+        del self.a[:]
+        del self.b[:]
+
+        for safe in self.a, self.b, self.d, (self.d, self.d):
+            verify(not pprint.isrecursive(safe),
+                   "expected not isrecursive for " + `safe`)
+            verify(pprint.isreadable(safe),
+                   "expected isreadable for " + `safe`)
+
+    def test_unreadable(self):
+        """Not recursive but not readable anyway."""
+        verify = self.assert_
+        for unreadable in type(3), pprint, pprint.isrecursive:
+            verify(not pprint.isrecursive(unreadable),
+                   "expected not isrecursive for " + `unreadable`)
+            verify(not pprint.isreadable(unreadable),
+                   "expected not isreadable for " + `unreadable`)
+
+
+test_support.run_unittest(QueryTestCase)