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authorMichael Muré <batolettre@gmail.com>2023-01-22 07:32:47 +0100
committerMichael Muré <batolettre@gmail.com>2023-01-22 07:32:47 +0100
commitb66d467a39638ff7f5840017a1d986c6de341b4b (patch)
treec25a2b194ed4633dd23b2af53aa52ef45d49e344 /commands/cmdtest/regex.go
parent06e8396e6fe83c691bbdfd74cfdd6bc28a0d20f1 (diff)
downloadgit-bug-b66d467a39638ff7f5840017a1d986c6de341b4b.tar.gz
commands: add a helper to generate testing regex for CLI output
Diffstat (limited to 'commands/cmdtest/regex.go')
-rw-r--r--commands/cmdtest/regex.go62
1 files changed, 62 insertions, 0 deletions
diff --git a/commands/cmdtest/regex.go b/commands/cmdtest/regex.go
new file mode 100644
index 00000000..0b9cb672
--- /dev/null
+++ b/commands/cmdtest/regex.go
@@ -0,0 +1,62 @@
+package cmdtest
+
+import (
+ "regexp"
+ "strings"
+)
+
+const ExpId = "\x07id\x07"
+const ExpHumanId = "\x07human-id\x07"
+const ExpTimestamp = "\x07timestamp\x07"
+const ExpISO8601 = "\x07iso8601\x07"
+
+const ExpOrgModeDate = "\x07org-mode-date\x07"
+
+// MakeExpectedRegex transform a raw string of an expected output into a regex suitable for testing.
+// Some markers like ExpId are available to substitute the appropriate regex for element that can vary randomly.
+func MakeExpectedRegex(input string) string {
+ var substitutes = map[string]string{
+ ExpId: `[0-9a-f]{64}`,
+ ExpHumanId: `[0-9a-f]{7}`,
+ ExpTimestamp: `[0-9]{7,10}`,
+ ExpISO8601: `\d{4}(-\d\d(-\d\d(T\d\d:\d\d(:\d\d)?(\.\d+)?(([+-]\d\d:\d\d)|Z)?)?)?)?`,
+ ExpOrgModeDate: `\d\d\d\d-\d\d-\d\d [[:alpha:]]{3} \d\d:\d\d`,
+ }
+
+ escaped := []rune(regexp.QuoteMeta(input))
+
+ var result strings.Builder
+ var inSubstitute bool
+ var substitute strings.Builder
+
+ result.WriteString("^")
+
+ for i := 0; i < len(escaped); i++ {
+ r := escaped[i]
+ if !inSubstitute && r == '\x07' {
+ substitute.Reset()
+ substitute.WriteRune(r)
+ inSubstitute = true
+ continue
+ }
+ if inSubstitute && r == '\x07' {
+ substitute.WriteRune(r)
+ sub, ok := substitutes[substitute.String()]
+ if !ok {
+ panic("unknown substitute: " + substitute.String())
+ }
+ result.WriteString(sub)
+ inSubstitute = false
+ continue
+ }
+ if inSubstitute {
+ substitute.WriteRune(r)
+ } else {
+ result.WriteRune(r)
+ }
+ }
+
+ result.WriteString("$")
+
+ return result.String()
+}