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detect_test.go
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detect_test.go
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package nodemodulebom_test
import (
"path/filepath"
"testing"
"os"
nodemodulebom "github.com/paketo-buildpacks/node-module-bom"
"github.com/paketo-buildpacks/packit/v2"
"github.com/sclevine/spec"
. "github.com/onsi/gomega"
)
func testDetect(t *testing.T, context spec.G, it spec.S) {
var (
Expect = NewWithT(t).Expect
detect packit.DetectFunc
workingDir string
)
it.Before(func() {
var err error
workingDir, err = os.MkdirTemp("", "working-dir")
Expect(err).NotTo(HaveOccurred())
detect = nodemodulebom.Detect()
})
it.After(func() {
Expect(os.RemoveAll(workingDir)).To(Succeed())
})
it("returns a plan that provides nothing and requires node and node_modules", func() {
result, err := detect(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).NotTo(HaveOccurred())
Expect(result.Plan).To(Equal(packit.BuildPlan{
Requires: []packit.BuildPlanRequirement{
{
Name: "node",
Metadata: map[string]interface{}{
"build": true,
},
},
{
Name: "node_modules",
Metadata: map[string]interface{}{
"build": true,
},
},
},
}))
})
context("the app contains vendored node_modules", func() {
it.Before(func() {
Expect(os.Mkdir(filepath.Join(workingDir, "node_modules"), os.ModePerm)).To(Succeed())
})
it("returns a plan that provides nothing and only requires node", func() {
result, err := detect(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).NotTo(HaveOccurred())
Expect(result.Plan).To(Equal(packit.BuildPlan{
Requires: []packit.BuildPlanRequirement{
{
Name: "node",
Metadata: map[string]interface{}{
"build": true,
},
},
},
}))
})
})
context("failure cases", func() {
context("node_modules directory exists but cannot be stat", func() {
it.Before(func() {
Expect(os.Chmod(workingDir, 0000)).To(Succeed())
})
it.After(func() {
Expect(os.Chmod(workingDir, os.ModePerm)).To(Succeed())
})
it("returns an error", func() {
_, err := detect(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).To(MatchError(ContainSubstring("permission denied")))
})
})
})
}