单测-让咱们保持短小而专一于单一行为

assertThat assertThat(a).isEqualTo(1); //complete the assertion below: a >= 1 assertThat(a).isGreaterThanOrEqualTo(1); //complete the assertion below: 0 < a < 100 assertThat(a).isStrictlyBetween(0, 10

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