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package matchers_test
import (
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
. "github.com/onsi/gomega/matchers"
)
var _ = Describe("NotMatcher", func() {
Context("basic examples", func() {
It("works", func() {
Expect(input).To(Not(false1))
Expect(input).To(Not(Not(true2)))
Expect(input).ToNot(Not(true3))
Expect(input).ToNot(Not(Not(false1)))
Expect(input).To(Not(Not(Not(false2))))
})
})
Context("De Morgan's laws", func() {
It("~(A && B) == ~A || ~B", func() {
Expect(input).To(Not(And(false1, false2)))
Expect(input).To(Or(Not(false1), Not(false2)))
})
It("~(A || B) == ~A && ~B", func() {
Expect(input).To(Not(Or(false1, false2)))
Expect(input).To(And(Not(false1), Not(false2)))
})
})
Context("failure messages are opposite of original matchers' failure messages", func() {
Context("when match fails", func() {
It("gives a descriptive message", func() {
verifyFailureMessage(Not(HaveLen(2)), input, "not to have length 2")
})
})
Context("when match succeeds, but expected it to fail", func() {
It("gives a descriptive message", func() {
verifyFailureMessage(Not(Not(HaveLen(3))), input, "to have length 3")
})
})
})
Context("MatchMayChangeInTheFuture()", func() {
It("Propagates value from wrapped matcher", func() {
m := Not(Or()) // an empty Or() always returns false, and indicates it cannot change
Expect(m.Match("anything")).To(BeTrue())
Expect(m.(*NotMatcher).MatchMayChangeInTheFuture("anything")).To(BeFalse())
})
It("Defaults to true", func() {
m := Not(Equal(1)) // Equal does not have this method
Expect(m.Match(2)).To(BeTrue())
Expect(m.(*NotMatcher).MatchMayChangeInTheFuture(2)).To(BeTrue()) // defaults to true
})
})
})
|
