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build_test.go
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build_test.go
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package hugobuildpack_test
import (
"bytes"
"errors"
"io/ioutil"
"os"
"path/filepath"
"testing"
hugobuildpack "github.com/fg-j/explorations/hugo-buildpack"
"github.com/fg-j/explorations/hugo-buildpack/fakes"
"github.com/paketo-buildpacks/packit"
"github.com/paketo-buildpacks/packit/postal"
"github.com/paketo-buildpacks/packit/scribe"
"github.com/sclevine/spec"
. "github.com/onsi/gomega"
)
func testBuild(t *testing.T, context spec.G, it spec.S) {
var (
Expect = NewWithT(t).Expect
buffer *bytes.Buffer
cnbDir string
dependencyManager *fakes.DependencyManager
entryResolver *fakes.EntryResolver
executable *fakes.Executable
layersDir string
workingDir string
build packit.BuildFunc
)
it.Before(func() {
var err error
layersDir, err = ioutil.TempDir("", "layers")
Expect(err).NotTo(HaveOccurred())
cnbDir, err = ioutil.TempDir("", "cnb")
Expect(err).NotTo(HaveOccurred())
workingDir, err = ioutil.TempDir("", "working-dir")
Expect(err).NotTo(HaveOccurred())
entryResolver = &fakes.EntryResolver{}
entryResolver.ResolveCall.Returns.BuildpackPlanEntry = packit.BuildpackPlanEntry{
Name: "hugo",
}
dependencyManager = &fakes.DependencyManager{}
dependencyManager.ResolveCall.Returns.Dependency = postal.Dependency{
ID: "hugo",
Name: "hugo-dependency-name",
SHA256: "hugo-dependency-sha",
Stacks: []string{"some-stack"},
URI: "hugo-dependency-uri",
Version: "hugo-dependency-version",
}
executable = &fakes.Executable{}
buffer = bytes.NewBuffer(nil)
logEmitter := scribe.NewEmitter(buffer)
build = hugobuildpack.Build(entryResolver, dependencyManager, executable, logEmitter)
})
it.After(func() {
Expect(os.RemoveAll(layersDir)).To(Succeed())
Expect(os.RemoveAll(cnbDir)).To(Succeed())
Expect(os.RemoveAll(workingDir)).To(Succeed())
})
it("returns a result that installs hugo and builds correctly", func() {
result, err := build(packit.BuildContext{
WorkingDir: workingDir,
CNBPath: cnbDir,
Stack: "some-stack",
BuildpackInfo: packit.BuildpackInfo{
Name: "Some Buildpack",
Version: "some-version",
},
Plan: packit.BuildpackPlan{
Entries: []packit.BuildpackPlanEntry{
{
Name: "hugo",
},
},
},
Layers: packit.Layers{Path: layersDir},
})
Expect(err).NotTo(HaveOccurred())
Expect(result).To(Equal(packit.BuildResult{
Plan: packit.BuildpackPlan{},
Layers: []packit.Layer{
{
Name: "hugo",
Path: filepath.Join(layersDir, "hugo"),
SharedEnv: packit.Environment{},
BuildEnv: packit.Environment{},
LaunchEnv: packit.Environment{},
ProcessLaunchEnv: map[string]packit.Environment{},
Build: false,
Launch: false,
Cache: false,
},
},
}))
})
context("failure cases", func() {
context("dependency resolution fails", func() {
it.Before(func() {
dependencyManager.ResolveCall.Returns.Error = errors.New("dependency resolution error")
})
it("fails to build with the appropriate error", func() {
_, err := build(packit.BuildContext{
WorkingDir: workingDir,
CNBPath: cnbDir,
Stack: "some-stack",
BuildpackInfo: packit.BuildpackInfo{
Name: "Some Buildpack",
Version: "some-version",
},
Plan: packit.BuildpackPlan{
Entries: []packit.BuildpackPlanEntry{
{
Name: "hugo",
},
},
},
Layers: packit.Layers{Path: layersDir},
})
Expect(err).To(MatchError(ContainSubstring("dependency resolution error")))
})
})
context("layer cannot be read/written", func() {
it.Before(func() {
Expect(os.Chmod(layersDir, 0000)).To(Succeed())
})
it.After(func() {
Expect(os.Chmod(layersDir, os.ModePerm)).To(Succeed())
})
it("fails to build with the appropriate error", func() {
_, err := build(packit.BuildContext{
WorkingDir: workingDir,
CNBPath: cnbDir,
Stack: "some-stack",
BuildpackInfo: packit.BuildpackInfo{
Name: "Some Buildpack",
Version: "some-version",
},
Plan: packit.BuildpackPlan{
Entries: []packit.BuildpackPlanEntry{
{
Name: "hugo",
},
},
},
Layers: packit.Layers{Path: layersDir},
})
Expect(err).To(MatchError(ContainSubstring("permission denied")))
})
})
context("dependency installation fails", func() {
it.Before(func() {
dependencyManager.DeliverCall.Returns.Error = errors.New("dependency installation error")
})
it("fails to build with the appropriate error", func() {
_, err := build(packit.BuildContext{
WorkingDir: workingDir,
CNBPath: cnbDir,
Stack: "some-stack",
BuildpackInfo: packit.BuildpackInfo{
Name: "Some Buildpack",
Version: "some-version",
},
Plan: packit.BuildpackPlan{
Entries: []packit.BuildpackPlanEntry{
{
Name: "hugo",
},
},
},
Layers: packit.Layers{Path: layersDir},
})
Expect(err).To(MatchError(ContainSubstring("dependency installation error")))
})
})
context("hugo process execution fails", func() {
it.Before(func() {
executable.ExecuteCall.Returns.Error = errors.New("hugo error")
})
it("fails to build with the appropriate error", func() {
_, err := build(packit.BuildContext{
WorkingDir: workingDir,
CNBPath: cnbDir,
Stack: "some-stack",
BuildpackInfo: packit.BuildpackInfo{
Name: "Some Buildpack",
Version: "some-version",
},
Plan: packit.BuildpackPlan{
Entries: []packit.BuildpackPlanEntry{
{
Name: "hugo",
},
},
},
Layers: packit.Layers{Path: layersDir},
})
Expect(err).To(MatchError(ContainSubstring("hugo error")))
})
})
})
}