Meaning
Asserts that addition is commutative for the given operands.
Primary Function
Test the commutative property of addition in a unit test.
Communicative Purpose
Assert a mathematical property to verify correctness of an implementation.
Pattern
def test_<name>(<parameter_list>): assert <expression>
Core Structure
def test_<name>(<params>): assert <expr> where expr uses the params.
Função primária
Test the commutative property of addition in a unit test.
Propósito comunicativo
Assert a mathematical property to verify correctness of an implementation.
Situações de gatilho
When writing unit tests for numeric types or custom types that implement addition.
Contextos
Unit testing suites, property-based testing, educational examples of algebraic properties.
Padrão
def test_<name>(<parameter_list>): assert <expression>
Estrutura central
def test_<name>(<params>): assert <expr> where expr uses the params.
Slots de substituição
<name>, <parameter_list>, <expression>
Colocados típicos
- def
- test_
- assert
- ==
- +
Substituições comuns
- Different operators (*
- -)
- different variable names
- using self.assertEqual in unittest frameworks.
Erros comuns
Using assignment (=) instead of equality (==), forgetting self. in unittest methods, omitting parentheses.
Similar / contraste
Tests for associativity ((a + b) + c == a + (b + c)), distributivity (a * (b + c) == a*b + a*c).
Interferências
Confusing assignment with equality; confusing commutativity with other algebraic properties.
Família do chunk
- unit-test assertion patterns
Nuance
Assumes the operands support the + operator and that equality is meaningful for those types.
Efeito pragmático
Serves as an executable specification of the commutative property.
Dica de memória
commutes
Nota
Assumes the operands support the + operator and that equality is meaningful; for custom types ensure __eq__ is defined.
Upgrade path
Move to property‑based testing libraries (e.g., Hypothesis) for generic property testing.
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