TestSet_SliceOfScalarsIsLeftAlone pins that elements of a scalar slice are never rewritten: a zero element is not a field with a tag, so nothing appli

TestSet_SliceTagOverridesElementDefault covers precedence between a parent's tag and a child's own default: the parent wins.

TestSet_StructTagJSONWins covers precedence: what the parent's JSON provides is not overwritten by the child's own default.

TestSet_TextUnmarshalerWinsOverJSON pins the precedence between the two interfaces.

TestSet_TextUnmarshalerWinsOverSetter pins the precedence the README claims. A successful UnmarshalText returns out of setField ahead of the recursion

TestSet_TimeTime covers the stdlib struct most likely to carry a default tag. It reaches time.Time's UnmarshalText, and a value that does not parse is

TestSet_UnexportedCompositeFieldsAreSkippedWholesale pins how far the CanSet guard reaches: an unexported field is skipped whatever its type, so a who

TestSet_UnexportedFieldsAreSkipped pins that an unexported field is untouched even with a tag (reflect cannot set it), and that its presence does not

TestSet_UnmarshalerNeedsANonEmptyTag pins that neither interface is consulted for an empty tag, so a type that could unmarshal anything gets nothing f

TestSet_UnparsableValuesAreRejected covers a value the field's kind cannot parse: Set now returns an error naming the field, where it used to leave th

TestSet_UnsupportedKindsAreIgnored pins that kinds setField has no case for are left alone, tag or no tag, without an error.

TestSet_UntaggedPointerStructRecurses covers the pointer a caller has already allocated: even with no tag, Set descends into it and fills its fields.

TestSet_WellFormedJSONOfTheWrongShape covers the other way decoding fails: valid JSON that cannot land in the field's type. It surfaces as *json.Unmar

TestSet_WhitespaceTagIsNotEmpty pins that a stray space is a value rather than an absence: a string takes it verbatim, and every container tries to de

TestSetter_InvocationCount pins how many times Set calls a setter for each shape. A pointer field gets two calls — once from the Set recursion, once f

TestSetter_OverwritesCallerValueWhenUnguarded pins that a setter is trusted absolutely: unlike a tag, it is not checked against the field's current va

TestSetter_RunsAgainOnASecondSet pins that Set is not idempotent as far as setters go: calling it twice calls them twice over, which is the other half