test: add exponent tests

Author: Alvaro-Kothe

pandas/tests/io/parser/common/test_float.py

@@ -83,11 +83,22 @@ def test_too_many_exponent_digits(all_parsers_all_precisions, exp, request):
     "value, expected_value",
     [
         ("32.0", 32.0),
+        ("3.2e1", 32.0),
+        ("3.2e80", 3.2e80),
+        ("3.2e-80", 3.2e-80),
         ("18446744073709551616.0", float(1 << 64)),
         ("18446744073709551616.5", (1 << 64) + 0.5),
         ("36893488147419103232.3", (1 << 65) + 0.3),
     ],
-    ids=["small_float", "2pow64_float", "2pow64_plus_half", "2pow65_plus_third"],
+    ids=[
+        "small_float",
+        "small_float_exponent",
+        "big_exponent",
+        "small_exponent",
+        "2pow64_float",
+        "2pow64_plus_half",
+        "2pow65_plus_third",
+    ],
 )
 def test_small_int_followed_by_float(
     all_parsers_all_precisions, value, expected_value, request