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|
package assertion_test
import (
"errors"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
. "github.com/onsi/gomega/internal/assertion"
"github.com/onsi/gomega/internal/fakematcher"
)
var _ = Describe("Assertion", func() {
var (
a *Assertion
failureMessage string
failureCallerSkip int
matcher *fakematcher.FakeMatcher
)
input := "The thing I'm testing"
var fakeFailHandler = func(message string, callerSkip ...int) {
failureMessage = message
if len(callerSkip) == 1 {
failureCallerSkip = callerSkip[0]
}
}
BeforeEach(func() {
matcher = &fakematcher.FakeMatcher{}
failureMessage = ""
failureCallerSkip = 0
a = New(input, fakeFailHandler, 1)
})
Context("when called", func() {
It("should pass the provided input value to the matcher", func() {
a.Should(matcher)
Ω(matcher.ReceivedActual).Should(Equal(input))
matcher.ReceivedActual = ""
a.ShouldNot(matcher)
Ω(matcher.ReceivedActual).Should(Equal(input))
matcher.ReceivedActual = ""
a.To(matcher)
Ω(matcher.ReceivedActual).Should(Equal(input))
matcher.ReceivedActual = ""
a.ToNot(matcher)
Ω(matcher.ReceivedActual).Should(Equal(input))
matcher.ReceivedActual = ""
a.NotTo(matcher)
Ω(matcher.ReceivedActual).Should(Equal(input))
})
})
Context("when the matcher succeeds", func() {
BeforeEach(func() {
matcher.MatchesToReturn = true
matcher.ErrToReturn = nil
})
Context("and a positive assertion is being made", func() {
It("should not call the failure callback", func() {
a.Should(matcher)
Ω(failureMessage).Should(Equal(""))
})
It("should be true", func() {
Ω(a.Should(matcher)).Should(BeTrue())
})
})
Context("and a negative assertion is being made", func() {
It("should call the failure callback", func() {
a.ShouldNot(matcher)
Ω(failureMessage).Should(Equal("negative: The thing I'm testing"))
Ω(failureCallerSkip).Should(Equal(3))
})
It("should be false", func() {
Ω(a.ShouldNot(matcher)).Should(BeFalse())
})
})
})
Context("when the matcher fails", func() {
BeforeEach(func() {
matcher.MatchesToReturn = false
matcher.ErrToReturn = nil
})
Context("and a positive assertion is being made", func() {
It("should call the failure callback", func() {
a.Should(matcher)
Ω(failureMessage).Should(Equal("positive: The thing I'm testing"))
Ω(failureCallerSkip).Should(Equal(3))
})
It("should be false", func() {
Ω(a.Should(matcher)).Should(BeFalse())
})
})
Context("and a negative assertion is being made", func() {
It("should not call the failure callback", func() {
a.ShouldNot(matcher)
Ω(failureMessage).Should(Equal(""))
})
It("should be true", func() {
Ω(a.ShouldNot(matcher)).Should(BeTrue())
})
})
})
Context("When reporting a failure", func() {
BeforeEach(func() {
matcher.MatchesToReturn = false
matcher.ErrToReturn = nil
})
Context("and there is an optional description", func() {
It("should append the description to the failure message", func() {
a.Should(matcher, "A description")
Ω(failureMessage).Should(Equal("A description\npositive: The thing I'm testing"))
Ω(failureCallerSkip).Should(Equal(3))
})
})
Context("and there are multiple arguments to the optional description", func() {
It("should append the formatted description to the failure message", func() {
a.Should(matcher, "A description of [%d]", 3)
Ω(failureMessage).Should(Equal("A description of [3]\npositive: The thing I'm testing"))
Ω(failureCallerSkip).Should(Equal(3))
})
})
})
Context("When the matcher returns an error", func() {
BeforeEach(func() {
matcher.ErrToReturn = errors.New("Kaboom!")
})
Context("and a positive assertion is being made", func() {
It("should call the failure callback", func() {
matcher.MatchesToReturn = true
a.Should(matcher)
Ω(failureMessage).Should(Equal("Kaboom!"))
Ω(failureCallerSkip).Should(Equal(3))
})
})
Context("and a negative assertion is being made", func() {
It("should call the failure callback", func() {
matcher.MatchesToReturn = false
a.ShouldNot(matcher)
Ω(failureMessage).Should(Equal("Kaboom!"))
Ω(failureCallerSkip).Should(Equal(3))
})
})
It("should always be false", func() {
Ω(a.Should(matcher)).Should(BeFalse())
Ω(a.ShouldNot(matcher)).Should(BeFalse())
})
})
Context("when there are extra parameters", func() {
It("(a simple example)", func() {
Ω(func() (string, int, error) {
return "foo", 0, nil
}()).Should(Equal("foo"))
})
Context("when the parameters are all nil or zero", func() {
It("should invoke the matcher", func() {
matcher.MatchesToReturn = true
matcher.ErrToReturn = nil
var typedNil []string
a = New(input, fakeFailHandler, 1, 0, nil, typedNil)
result := a.Should(matcher)
Ω(result).Should(BeTrue())
Ω(matcher.ReceivedActual).Should(Equal(input))
Ω(failureMessage).Should(BeZero())
})
})
Context("when any of the parameters are not nil or zero", func() {
It("should call the failure callback", func() {
matcher.MatchesToReturn = false
matcher.ErrToReturn = nil
a = New(input, fakeFailHandler, 1, errors.New("foo"))
result := a.Should(matcher)
Ω(result).Should(BeFalse())
Ω(matcher.ReceivedActual).Should(BeZero(), "The matcher doesn't even get called")
Ω(failureMessage).Should(ContainSubstring("foo"))
failureMessage = ""
a = New(input, fakeFailHandler, 1, nil, 1)
result = a.ShouldNot(matcher)
Ω(result).Should(BeFalse())
Ω(failureMessage).Should(ContainSubstring("1"))
failureMessage = ""
a = New(input, fakeFailHandler, 1, nil, 0, []string{"foo"})
result = a.To(matcher)
Ω(result).Should(BeFalse())
Ω(failureMessage).Should(ContainSubstring("foo"))
failureMessage = ""
a = New(input, fakeFailHandler, 1, nil, 0, []string{"foo"})
result = a.ToNot(matcher)
Ω(result).Should(BeFalse())
Ω(failureMessage).Should(ContainSubstring("foo"))
failureMessage = ""
a = New(input, fakeFailHandler, 1, nil, 0, []string{"foo"})
result = a.NotTo(matcher)
Ω(result).Should(BeFalse())
Ω(failureMessage).Should(ContainSubstring("foo"))
Ω(failureCallerSkip).Should(Equal(3))
})
})
})
Context("Making an assertion without a registered fail handler", func() {
It("should panic", func() {
defer func() {
e := recover()
RegisterFailHandler(Fail)
if e == nil {
Fail("expected a panic to have occurred")
}
}()
RegisterFailHandler(nil)
Ω(true).Should(BeTrue())
})
})
})
|
