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-rw-r--r--common/test_utils.go37
1 files changed, 37 insertions, 0 deletions
diff --git a/common/test_utils.go b/common/test_utils.go
new file mode 100644
index 000000000..8346c147a
--- /dev/null
+++ b/common/test_utils.go
@@ -0,0 +1,37 @@
+package common
+
+import (
+ "encoding/json"
+ "fmt"
+ "io/ioutil"
+)
+
+// LoadJSON reads the given file and unmarshals its content.
+func LoadJSON(file string, val interface{}) error {
+ content, err := ioutil.ReadFile(file)
+ if err != nil {
+ return err
+ }
+ if err := json.Unmarshal(content, val); err != nil {
+ if syntaxerr, ok := err.(*json.SyntaxError); ok {
+ line := findLine(content, syntaxerr.Offset)
+ return fmt.Errorf("JSON syntax error at %v:%v: %v", file, line, err)
+ }
+ return fmt.Errorf("JSON unmarshal error in %v: %v", file, err)
+ }
+ return nil
+}
+
+// findLine returns the line number for the given offset into data.
+func findLine(data []byte, offset int64) (line int) {
+ line = 1
+ for i, r := range string(data) {
+ if int64(i) >= offset {
+ return
+ }
+ if r == '\n' {
+ line++
+ }
+ }
+ return
+}