cmd/jb: Create integration tests for init and install

cmd/jb/install_test.go

@@ -0,0 +1,73 @@
+// +build integration
+
+package main
+
+import (
+	"io/ioutil"
+	"net/url"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/jsonnet-bundler/jsonnet-bundler/pkg/jsonnetfile"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestInstallCommand(t *testing.T) {
+	testcases := []struct {
+		Name                    string
+		URLs                    []*url.URL
+		ExpectedCode            int
+		ExpectedJsonnetFile     []byte
+		ExpectedJsonnetLockFile []byte
+	}{
+		{
+			Name:                    "NoURLs",
+			ExpectedCode:            0,
+			ExpectedJsonnetFile:     []byte(`{"dependencies":null}`),
+			ExpectedJsonnetLockFile: []byte(`{"dependencies":null}`),
+		}, {
+			Name: "OneURL",
+			URLs: []*url.URL{
+				{
+					Scheme: "https",
+					Host:   "github.com",
+					Path:   "jsonnet-bundler/jsonnet-bundler",
+				},
+			},
+			ExpectedCode:            0,
+			ExpectedJsonnetFile:     []byte(`{"dependencies": [{"name": "jsonnet-bundler", "source": {"git": {"remote": "https://github.com/jsonnet-bundler/jsonnet-bundler", "subdir": ""}}, "version": "master"}]}`),
+			ExpectedJsonnetLockFile: []byte(`{"dependencies": [{"name": "jsonnet-bundler", "source": {"git": {"remote": "https://github.com/jsonnet-bundler/jsonnet-bundler", "subdir": ""}}, "version": "080f157c7fb85ad0281ea78f6c641eaa570a582f"}]}`),
+		},
+	}
+
+	for _, tc := range testcases {
+		t.Run(tc.Name, func(t *testing.T) {
+			tempDir, err := ioutil.TempDir("", "jb-install")
+			assert.NoError(t, err)
+			defer os.Remove(tempDir)
+
+			jsonnetFile := filepath.Join(tempDir, jsonnetfile.File)
+			jsonnetLockFile := filepath.Join(tempDir, jsonnetfile.LockFile)
+
+			code := initCommand(tempDir)
+			assert.Equal(t, 0, code)
+
+			jsonnetFileContent(t, jsonnetFile, []byte(`{}`))
+
+			code = installCommand(tempDir, "vendor", tc.URLs...)
+			assert.Equal(t, tc.ExpectedCode, code)
+
+			jsonnetFileContent(t, jsonnetFile, tc.ExpectedJsonnetFile)
+			jsonnetFileContent(t, jsonnetLockFile, tc.ExpectedJsonnetLockFile)
+		})
+	}
+}
+
+func jsonnetFileContent(t *testing.T, filename string, content []byte) {
+	bytes, err := ioutil.ReadFile(filename)
+	assert.NoError(t, err)
+	if eq := assert.JSONEq(t, string(content), string(bytes)); !eq {
+		t.Log(string(bytes))
+	}
+}