Improve text strategy reprs

hypothesis-python/src/hypothesis/strategies/_internal/strings.py

@@ -46,26 +46,32 @@ def __init__(
             include_characters=whitelist_characters,
             exclude_characters=blacklist_characters,
         )
-        if not intervals:
-            arguments = [
+        self._arg_repr = ", ".join(
+            f"{k}={v!r}"
+            for k, v in [
                 ("whitelist_categories", whitelist_categories),
                 ("blacklist_categories", blacklist_categories),
                 ("whitelist_characters", whitelist_characters),
                 ("blacklist_characters", blacklist_characters),
                 ("min_codepoint", min_codepoint),
                 ("max_codepoint", max_codepoint),
             ]
+            if not (v in (None, "") or (k == "blacklist_categories" and v == ("Cs",)))
+        )
+        if not intervals:
             raise InvalidArgument(
                 "No characters are allowed to be generated by this "
-                "combination of arguments: "
-                + ", ".join("%s=%r" % arg for arg in arguments if arg[1] is not None)
+                f"combination of arguments: {self._arg_repr}"
             )
         self.intervals = IntervalSet(intervals)
         self.zero_point = self.intervals.index_above(ord("0"))
         self.Z_point = min(
             self.intervals.index_above(ord("Z")), len(self.intervals) - 1
         )
 
+    def __repr__(self):
+        return f"characters({self._arg_repr})"
+
     def do_draw(self, data):
         if len(self.intervals) > 256:
             if biased_coin(data, 0.2):
@@ -107,6 +113,16 @@ class TextStrategy(ListStrategy):
     def do_draw(self, data):
         return "".join(super().do_draw(data))
 
+    def __repr__(self):
+        args = []
+        if repr(self.element_strategy) != "characters()":
+            args.append(repr(self.element_strategy))
+        if self.min_size:
+            args.append(f"min_size={self.min_size}")
+        if self.max_size < float("inf"):
+            args.append(f"max_size={self.max_size}")
+        return f"text({', '.join(args)})"
+
     # See https://docs.python.org/3/library/stdtypes.html#string-methods
     # These methods always return Truthy values for any nonempty string.
     _nonempty_filters = ListStrategy._nonempty_filters + (

hypothesis-python/tests/ghostwriter/recorded/magic_builtins.txt

@@ -43,7 +43,7 @@ def test_fuzz_chr(i):
 
 @given(
     source=st.nothing(),
-    filename=st.nothing(),
+    filename=st.text(),
     mode=st.nothing(),
     flags=st.just(0),
     dont_inherit=st.booleans(),
@@ -69,7 +69,7 @@ def test_fuzz_complex(real, imag):
     complex(real=real, imag=imag)
 
 
-@given(obj=st.nothing(), name=st.nothing())
+@given(obj=st.nothing(), name=st.text())
 def test_fuzz_delattr(obj, name):
     delattr(obj, name)
 
@@ -112,12 +112,12 @@ def test_fuzz_format(value, format_spec):
     format(value, format_spec)
 
 
-@given(object=st.builds(object), name=st.nothing(), default=st.nothing())
+@given(object=st.builds(object), name=st.text(), default=st.nothing())
 def test_fuzz_getattr(object, name, default):
     getattr(object, name, default)
 
 
-@given(obj=st.nothing(), name=st.nothing())
+@given(obj=st.nothing(), name=st.text())
 def test_fuzz_hasattr(obj, name):
     hasattr(obj, name)
 
@@ -253,7 +253,7 @@ def test_fuzz_round(number, ndigits):
     round(number=number, ndigits=ndigits)
 
 
-@given(obj=st.nothing(), name=st.nothing(), value=st.nothing())
+@given(obj=st.nothing(), name=st.text(), value=st.nothing())
 def test_fuzz_setattr(obj, name, value):
     setattr(obj, name, value)