Close #18264: int- and float-derived enums now converted to int or float.

1 files changed, 81 insertions, 0 deletions

diff --git a/Lib/test/test_json/test_enum.py b/Lib/test/test_json/test_enum.py
new file mode 100644
index 0000000..66c6480
--- /dev/null
+++ b/Lib/test/test_json/test_enum.py
@@ -0,0 +1,81 @@
+from enum import Enum, IntEnum
+from test.test_json import PyTest, CTest
+
+SMALL = 1
+BIG = 1<<32
+HUGE = 1<<64
+REALLY_HUGE = 1<<96
+
+class BigNum(IntEnum):
+    small = SMALL
+    big = BIG
+    huge = HUGE
+    really_huge = REALLY_HUGE
+
+E = 2.718281
+PI = 3.141593
+TAU = 2 * PI
+
+class FloatNum(float, Enum):
+    e = E
+    pi = PI
+    tau = TAU
+
+class TestEnum:
+
+    def test_floats(self):
+        for enum in FloatNum:
+            self.assertEqual(self.dumps(enum), repr(enum.value))
+            self.assertEqual(float(self.dumps(enum)), enum)
+            self.assertEqual(self.loads(self.dumps(enum)), enum)
+
+    def test_ints(self):
+        for enum in BigNum:
+            self.assertEqual(self.dumps(enum), str(enum.value))
+            self.assertEqual(int(self.dumps(enum)), enum)
+            self.assertEqual(self.loads(self.dumps(enum)), enum)
+
+    def test_list(self):
+        self.assertEqual(
+                self.dumps(list(BigNum)),
+                str([SMALL, BIG, HUGE, REALLY_HUGE]),
+                )
+        self.assertEqual(self.dumps(list(FloatNum)), str([E, PI, TAU]))
+
+    def test_dict_keys(self):
+        s, b, h, r = BigNum
+        e, p, t = FloatNum
+        d = {
+            s:'tiny', b:'large', h:'larger', r:'largest',
+            e:"Euler's number", p:'pi', t:'tau',
+            }
+        nd = self.loads(self.dumps(d))
+        self.assertEqual(nd[str(SMALL)], 'tiny')
+        self.assertEqual(nd[str(BIG)], 'large')
+        self.assertEqual(nd[str(HUGE)], 'larger')
+        self.assertEqual(nd[str(REALLY_HUGE)], 'largest')
+        self.assertEqual(nd[repr(E)], "Euler's number")
+        self.assertEqual(nd[repr(PI)], 'pi')
+        self.assertEqual(nd[repr(TAU)], 'tau')
+
+    def test_dict_values(self):
+        d = dict(
+                tiny=BigNum.small,
+                large=BigNum.big,
+                larger=BigNum.huge,
+                largest=BigNum.really_huge,
+                e=FloatNum.e,
+                pi=FloatNum.pi,
+                tau=FloatNum.tau,
+                )
+        nd = self.loads(self.dumps(d))
+        self.assertEqual(nd['tiny'], SMALL)
+        self.assertEqual(nd['large'], BIG)
+        self.assertEqual(nd['larger'], HUGE)
+        self.assertEqual(nd['largest'], REALLY_HUGE)
+        self.assertEqual(nd['e'], E)
+        self.assertEqual(nd['pi'], PI)
+        self.assertEqual(nd['tau'], TAU)
+
+class TestPyEnum(TestEnum, PyTest): pass
+class TestCEnum(TestEnum, CTest): pass