1 files changed, 88 insertions, 0 deletions
diff --git a/htesting/test_helpers.go b/htesting/test_helpers.go
new file mode 100644
index 000000000..3804f28fe
--- /dev/null
+++ b/htesting/test_helpers.go
@@ -0,0 +1,88 @@
+// Copyright 2019 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package htesting
+
+import (
+	"math/rand"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/spf13/afero"
+)
+
+// CreateTempDir creates a temp dir in the given filesystem and
+// returns the dirnam and a func that removes it when done.
+func CreateTempDir(fs afero.Fs, prefix string) (string, func(), error) {
+	tempDir, err := afero.TempDir(fs, "", prefix)
+	if err != nil {
+		return "", nil, err
+	}
+
+	_, isOsFs := fs.(*afero.OsFs)
+
+	if isOsFs && runtime.GOOS == "darwin" && !strings.HasPrefix(tempDir, "/private") {
+		// To get the entry folder in line with the rest. This its a little bit
+		// mysterious, but so be it.
+		tempDir = "/private" + tempDir
+	}
+	return tempDir, func() { fs.RemoveAll(tempDir) }, nil
+}
+
+// BailOut panics with a stack trace after the given duration. Useful for
+// hanging tests.
+func BailOut(after time.Duration) {
+	time.AfterFunc(after, func() {
+		buf := make([]byte, 1<<16)
+		runtime.Stack(buf, true)
+		panic(string(buf))
+	})
+
+}
+
+var rnd = rand.New(rand.NewSource(time.Now().UnixNano()))
+
+func RandIntn(n int) int {
+	return rnd.Intn(n)
+}
+
+// DiffStringSlices returns the difference between two string slices.
+// Useful in tests.
+// See:
+// http://stackoverflow.com/questions/19374219/how-to-find-the-difference-between-two-slices-of-strings-in-golang
+func DiffStringSlices(slice1 []string, slice2 []string) []string {
+	diffStr := []string{}
+	m := map[string]int{}
+
+	for _, s1Val := range slice1 {
+		m[s1Val] = 1
+	}
+	for _, s2Val := range slice2 {
+		m[s2Val] = m[s2Val] + 1
+	}
+
+	for mKey, mVal := range m {
+		if mVal == 1 {
+			diffStr = append(diffStr, mKey)
+		}
+	}
+
+	return diffStr
+}
+
+// DiffStrings splits the strings into fields and runs it into DiffStringSlices.
+// Useful for tests.
+func DiffStrings(s1, s2 string) []string {
+	return DiffStringSlices(strings.Fields(s1), strings.Fields(s2))
+}