assertEqual(a, b) # checks that a == b

assertIs(a, b) # checks that a is b

解決方法:

使用assertEqual這兩個對象不需要是同一類型,它們只需要是相同的值.相比之下,使用assertIs,兩個對象需要是同一個對象.

斷言的assertEqual測試,如==運算符：

The operators , ==, >=, <=, and != compare the values of two objects. The objects need not have the same type. If both are numbers, they are converted to a common type. Otherwise, objects of different types always compare unequal, and are ordered consistently but arbitrarily.

assertI測試對象標識與is相同而不是運算符：

The operators is and is not test for object identity: x is y is true if and only if x and y are the same object. x is not y yields the inverse truth value.

以上引用均來自Python文檔部分5.9 Comparisons.

標簽：python,unit-testing

來源： https://codeday.me/bug/20191008/1870437.html

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