fully define TestFromNodeModules

buildtools/npm/manifest_test.go

@@ -1,6 +1,7 @@
 package npm
 
 import (
+	"errors"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -14,3 +15,53 @@ func TestFromManifest(t *testing.T) {
 	assert.NotEmpty(t, manifest.Dependencies)
 	assert.Equal(t, manifest.Dependencies["chai"], "4.1.2")
 }
+
+func TestFromNodeModules(t *testing.T) {
+	manifests, err := FromNodeModules("testdata/package.json")
+	assert.NoError(t, err)
+
+	/*
+	   └─┬ chai@4.1.2
+	     ├── assertion-error@1.1.0
+	     ├── check-error@1.0.2
+	     ├─┬ deep-eql@3.0.1
+	     │ └── type-detect@4.0.8 deduped
+	     ├── get-func-name@2.0.0
+	     ├── pathval@1.1.0
+	     └── type-detect@4.0.8
+	*/
+
+	assert.NotEmpty(t, manifests)
+	assert.True(t, containtsDep(manifests, "assertion-error", "1.1.0"), "Manifests does not include dep assertion-error")
+	assert.True(t, containtsDep(manifests, "check-error", "1.0.2"), "Manifests does not include dep check-error")
+	assert.True(t, containtsDep(manifests, "get-func-name", "2.0.0"), "Manifests does not include dep get-func-name")
+	assert.True(t, containtsDep(manifests, "pathval", "1.1.0"), "Manifests does not include dep pathval")
+	assert.True(t, containtsDep(manifests, "type-detect", "4.0.8"), "Manifests does not include dep type-detect")
+
+	// check transitive dep's existance
+	deps, err := selectDep(manifests, "deep-eql", "3.0.1")
+	assert.NoError(t, err, "Manifests does not include dep deep-eql")
+
+	deepEql := deps[0]
+	assert.NotEmpty(t, deepEql.Dependencies)
+	assert.Len(t, deepEql.Dependencies, 1)
+	assert.Contains(t, deepEql.Dependencies, "type-detect")
+}
+
+func selectDep(manifests []Manifest, name string, version string) ([]Manifest, error) {
+	for _, v := range manifests {
+		if v.Name == name && v.Version == version {
+			return []Manifest{v}, nil
+		}
+	}
+
+	var emptyArr []Manifest
+
+	return emptyArr, errors.New("could not find manifest")
+}
+
+func containtsDep(manifests []Manifest, name string, version string) bool {
+	manifests, err := selectDep(manifests, name, version)
+
+	return err == nil
+}