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detect_test.go
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package static
import (
"bytes"
"os"
"path/filepath"
"testing"
"github.com/paketo-buildpacks/packit/v2"
"github.com/paketo-buildpacks/packit/v2/scribe"
"github.com/sclevine/spec"
. "github.com/onsi/gomega"
)
func testDetect(t *testing.T, context spec.G, it spec.S) {
var (
Expect = NewWithT(t).Expect
workingDir string
buffer *bytes.Buffer
name = "static-confgen"
indexFile = `
<!DOCTYPE html>
<html></html>`
packageJSONFile = `
{
"engines": {
"node": "1.2.3"
}
}`
)
it.Before(func() {
buffer = bytes.NewBuffer(nil)
})
context("when an index.html is present", func() {
it.Before(func() {
var err error
workingDir, err = os.MkdirTemp(t.TempDir(), "working-dir-*")
Expect(err).NotTo(HaveOccurred())
err = os.WriteFile(filepath.Join(workingDir, "index.html"), []byte(indexFile), os.ModePerm)
Expect(err).NotTo(HaveOccurred())
})
it("detects", func() {
result, err := Detect(scribe.NewEmitter(buffer))(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).NotTo(HaveOccurred())
Expect(result.Plan.Provides).To(ContainElement(packit.BuildPlanProvision{Name: name}))
Expect(result.Plan.Requires).To(ContainElement(packit.BuildPlanRequirement{
Name: name, Metadata: BuildPlanMetadata{WebRoot: "./"},
}))
})
})
context("when an index.html is in the public directory", func() {
it.Before(func() {
var err error
workingDir, err = os.MkdirTemp(t.TempDir(), "working-dir-*")
Expect(err).NotTo(HaveOccurred())
Expect(os.Mkdir(filepath.Join(workingDir, "public"), os.ModePerm)).NotTo(HaveOccurred())
err = os.WriteFile(filepath.Join(workingDir, "public", "index.html"), []byte(indexFile), os.ModePerm)
Expect(err).NotTo(HaveOccurred())
})
it("detects", func() {
result, err := Detect(scribe.NewEmitter(buffer))(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).NotTo(HaveOccurred())
Expect(result.Plan.Provides).To(ContainElement(packit.BuildPlanProvision{Name: name}))
Expect(result.Plan.Requires).To(ContainElement(packit.BuildPlanRequirement{
Name: name, Metadata: BuildPlanMetadata{WebRoot: "./public"},
}))
})
})
context("when no index.html is present", func() {
it("fails detection", func() {
_, err := Detect(scribe.NewEmitter(buffer))(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).To(MatchError(packit.Fail.WithMessage("no index.html found")))
})
})
context("when index.html is a directory", func() {
it.Before(func() {
var err error
workingDir, err = os.MkdirTemp(t.TempDir(), "working-dir-*")
Expect(err).NotTo(HaveOccurred())
Expect(os.Mkdir(filepath.Join(workingDir, "index.html"), os.ModePerm)).NotTo(HaveOccurred())
})
it("fails detection", func() {
_, err := Detect(scribe.NewEmitter(buffer))(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).To(MatchError(packit.Fail.WithMessage("no index.html found")))
})
})
context("when a package.json is present", func() {
it.Before(func() {
var err error
workingDir, err = os.MkdirTemp(t.TempDir(), "working-dir-*")
Expect(err).NotTo(HaveOccurred())
err = os.WriteFile(filepath.Join(workingDir, "index.html"), []byte(indexFile), os.ModePerm)
Expect(err).NotTo(HaveOccurred())
err = os.WriteFile(filepath.Join(workingDir, "package.json"), []byte(packageJSONFile), os.ModePerm)
Expect(err).NotTo(HaveOccurred())
})
it("sets the webroot accordingly", func() {
result, err := Detect(scribe.NewEmitter(buffer))(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).NotTo(HaveOccurred())
Expect(result.Plan.Provides).To(ContainElement(packit.BuildPlanProvision{Name: name}))
Expect(result.Plan.Requires).To(ContainElement(packit.BuildPlanRequirement{
Name: name, Metadata: BuildPlanMetadata{WebRoot: "build"},
}))
})
})
context("when a package.json is present in BP_NODE_PROJECT_PATH", func() {
var nodeProjectPath = "node-app"
it.Before(func() {
var err error
workingDir, err = os.MkdirTemp(t.TempDir(), "working-dir-*")
Expect(err).NotTo(HaveOccurred())
err = os.WriteFile(filepath.Join(workingDir, "index.html"), []byte(indexFile), os.ModePerm)
Expect(err).NotTo(HaveOccurred())
Expect(os.MkdirAll(filepath.Join(workingDir, nodeProjectPath), os.ModePerm)).NotTo(HaveOccurred())
err = os.WriteFile(filepath.Join(workingDir, nodeProjectPath, "package.json"), []byte(packageJSONFile), os.ModePerm)
Expect(err).NotTo(HaveOccurred())
t.Setenv("BP_NODE_PROJECT_PATH", nodeProjectPath)
})
it("sets the webroot accordingly", func() {
result, err := Detect(scribe.NewEmitter(buffer))(packit.DetectContext{
WorkingDir: workingDir,
})
Expect(err).NotTo(HaveOccurred())
Expect(result.Plan.Provides).To(ContainElement(packit.BuildPlanProvision{Name: name}))
Expect(result.Plan.Requires).To(ContainElement(packit.BuildPlanRequirement{
Name: name, Metadata: BuildPlanMetadata{WebRoot: filepath.Join(nodeProjectPath, "build")},
}))
})
})
}