golang/dep

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package godep

import (
    "bytes"
    "fmt"
    "log"
    "path/filepath"
    "testing"

    "github.com/golang/dep"
    "github.com/golang/dep/gps"
    "github.com/golang/dep/internal/importers/importertest"
    "github.com/golang/dep/internal/test"
    "github.com/pkg/errors"
)

func TestGodepConfig_Convert(t *testing.T) {
    testCases := map[string]struct {
        importertest.TestCase
        json godepJSON
    }{
        "package without comment": {
            importertest.TestCase{
                WantConstraint: importertest.V1Constraint,
                WantRevision:   importertest.V1Rev,
                WantVersion:    importertest.V1Tag,
            },
            godepJSON{
                Imports: []godepPackage{
                    {
                        ImportPath: importertest.Project,
                        Rev:        importertest.V1Rev,
                    },
                },
            },
        },
        "package with comment": {
            importertest.TestCase{
                WantConstraint: importertest.V2Branch,
                WantRevision:   importertest.V2PatchRev,
                WantVersion:    importertest.V2PatchTag,
            },
            godepJSON{
                Imports: []godepPackage{
                    {
                        ImportPath: importertest.Project,
                        Rev:        importertest.V2PatchRev,
                        Comment:    importertest.V2Branch,
                    },
                },
            },
        },
        "missing package name": {
            importertest.TestCase{
                WantWarning: "Warning: Skipping project. Invalid godep configuration, ImportPath is required",
            },
            godepJSON{
                Imports: []godepPackage{{ImportPath: ""}},
            },
        },
        "missing revision": {
            importertest.TestCase{
                WantWarning: fmt.Sprintf(
                    "Warning: Invalid godep configuration, Rev not found for ImportPath %q",
                    importertest.Project,
                ),
            },
            godepJSON{
                Imports: []godepPackage{
                    {
                        ImportPath: importertest.Project,
                    },
                },
            },
        },
        "package with requirements": {
            importertest.TestCase{
                WantRequired: []string{importertest.Project},
            },
            godepJSON{
                Required: []string{importertest.Project},
            },
        },
        "package with local requirements": {
            importertest.TestCase{
                WantRequired: nil,
            },
            godepJSON{
                Required: []string{"./..."},
            },
        },
    }

    for name, testCase := range testCases {
        name := name
        testCase := testCase
        t.Run(name, func(t *testing.T) {
            err := testCase.Execute(t, func(logger *log.Logger, sm gps.SourceManager) (*dep.Manifest, *dep.Lock) {
                g := NewImporter(logger, true, sm)
                g.json = testCase.json
                return g.convert(importertest.RootProject)
            })
            if err != nil {
                t.Fatalf("%#v", err)
            }
        })
    }
}

func TestGodepConfig_Import(t *testing.T) {
    h := test.NewHelper(t)
    defer h.Cleanup()

    cacheDir := "gps-repocache"
    h.TempDir(cacheDir)
    h.TempDir("src")
    h.TempDir(filepath.Join("src", importertest.RootProject))
    h.TempCopy(filepath.Join(importertest.RootProject, godepPath), "Godeps.json")

    projectRoot := h.Path(importertest.RootProject)
    sm, err := gps.NewSourceManager(gps.SourceManagerConfig{
        Cachedir: h.Path(cacheDir),
        Logger:   log.New(test.Writer{TB: t}, "", 0),
    })
    h.Must(err)
    defer sm.Release()

    // Capture stderr so we can verify output
    verboseOutput := &bytes.Buffer{}
    logger := log.New(verboseOutput, "", 0)

    g := NewImporter(logger, false, sm) // Disable Verbose so that we don't print values that change each test run
    if !g.HasDepMetadata(projectRoot) {
        t.Fatal("Expected the importer to detect godep configuration file")
    }

    m, l, err := g.Import(projectRoot, importertest.RootProject)
    h.Must(err)

    if m == nil {
        t.Fatal("Expected the manifest to be generated")
    }

    if l == nil {
        t.Fatal("Expected the lock to be generated")
    }

    goldenFile := "golden.txt"
    got := verboseOutput.String()
    want := h.GetTestFileString(goldenFile)
    if want != got {
        if *test.UpdateGolden {
            if err := h.WriteTestFile(goldenFile, got); err != nil {
                t.Fatalf("%+v", errors.Wrapf(err, "Unable to write updated golden file %s", goldenFile))
            }
        } else {
            t.Fatalf("want %s, got %s", want, got)
        }
    }
}

func TestGodepConfig_JsonLoad(t *testing.T) {
    // This is same as cmd/dep/testdata/init/Godeps.json
    wantJSON := godepJSON{
        Imports: []godepPackage{
            {
                ImportPath: "github.com/sdboyer/deptest",
                Rev:        "3f4c3bea144e112a69bbe5d8d01c1b09a544253f",
            },
            {
                ImportPath: "github.com/sdboyer/deptestdos",
                Rev:        "5c607206be5decd28e6263ffffdcee067266015e",
                Comment:    "v2.0.0",
            },
        },
    }

    h := test.NewHelper(t)
    defer h.Cleanup()

    ctx := importertest.NewTestContext(h)

    h.TempCopy(filepath.Join(importertest.RootProject, godepPath), "Godeps.json")

    projectRoot := h.Path(importertest.RootProject)

    g := NewImporter(ctx.Err, true, nil)
    err := g.load(projectRoot)
    if err != nil {
        t.Fatalf("Error while loading... %v", err)
    }

    if !equalImports(g.json.Imports, wantJSON.Imports) {
        t.Fatalf("Expected imports to be equal. \n\t(GOT): %v\n\t(WNT): %v", g.json.Imports, wantJSON.Imports)
    }
}

// equalImports compares two slices of godepPackage and checks if they are
// equal.
func equalImports(a, b []godepPackage) bool {
    if a == nil && b == nil {
        return true
    }

    if a == nil || b == nil {
        return false
    }

    if len(a) != len(b) {
        return false
    }

    for i := range a {
        if a[i] != b[i] {
            return false
        }
    }

    return true
}