github.com/onsi/gomega@v1.32.0/matchers/have_cap_matcher_test.go (about)

     1  package matchers_test
     2  
     3  import (
     4  	. "github.com/onsi/ginkgo/v2"
     5  	. "github.com/onsi/gomega"
     6  	. "github.com/onsi/gomega/matchers"
     7  )
     8  
     9  var _ = Describe("HaveCap", func() {
    10  	When("passed a supported type", func() {
    11  		It("should do the right thing", func() {
    12  			Expect([0]int{}).Should(HaveCap(0))
    13  			Expect([2]int{1}).Should(HaveCap(2))
    14  
    15  			Expect([]int{}).Should(HaveCap(0))
    16  			Expect([]int{1, 2, 3, 4, 5}[:2]).Should(HaveCap(5))
    17  			Expect(make([]int, 0, 5)).Should(HaveCap(5))
    18  
    19  			c := make(chan bool, 3)
    20  			Expect(c).Should(HaveCap(3))
    21  			c <- true
    22  			c <- true
    23  			Expect(c).Should(HaveCap(3))
    24  
    25  			Expect(make(chan bool)).Should(HaveCap(0))
    26  		})
    27  	})
    28  
    29  	When("passed a correctly typed nil", func() {
    30  		It("should operate succesfully on the passed in value", func() {
    31  			var nilSlice []int
    32  			Expect(nilSlice).Should(HaveCap(0))
    33  
    34  			var nilChan chan int
    35  			Expect(nilChan).Should(HaveCap(0))
    36  		})
    37  	})
    38  
    39  	When("passed an unsupported type", func() {
    40  		It("should error", func() {
    41  			success, err := (&HaveCapMatcher{Count: 0}).Match(0)
    42  			Expect(success).Should(BeFalse())
    43  			Expect(err).Should(HaveOccurred())
    44  
    45  			success, err = (&HaveCapMatcher{Count: 0}).Match(nil)
    46  			Expect(success).Should(BeFalse())
    47  			Expect(err).Should(HaveOccurred())
    48  		})
    49  	})
    50  })