58 lines
1.7 KiB
Go
58 lines
1.7 KiB
Go
|
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
|
||
|
|
})
|
||
|
|
})
|
||
|
|
})
|