Adding regexp support

Signed-off-by: Dave Henderson <dhenderson@gmail.com>

2 files changed, 38 insertions, 0 deletions

diff --git a/regexp/regexp.go b/regexp/regexp.go
new file mode 100644
index 00000000..8aeaa43c
--- /dev/null
+++ b/regexp/regexp.go
@@ -0,0 +1,15 @@
+package regexp
+
+import stdre "regexp"
+
+// Replace -
+func Replace(expression, replacement, input string) string {
+	re := stdre.MustCompile(expression)
+	return re.ReplaceAllString(input, replacement)
+}
+
+// Match -
+func Match(expression, input string) bool {
+	re := stdre.MustCompile(expression)
+	return re.MatchString(input)
+}
diff --git a/regexp/regexp_test.go b/regexp/regexp_test.go
new file mode 100644
index 00000000..15adccd4
--- /dev/null
+++ b/regexp/regexp_test.go
@@ -0,0 +1,23 @@
+package regexp
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestReplace(t *testing.T) {
+	assert.Equal(t, "-T-T-", Replace("a(x*)b", "T", "-ab-axxb-"))
+	assert.Equal(t, "--xx-", Replace("a(x*)b", "$1", "-ab-axxb-"))
+	assert.Equal(t, "---", Replace("a(x*)b", "$1W", "-ab-axxb-"))
+	assert.Equal(t, "-W-xxW-", Replace("a(x*)b", "${1}W", "-ab-axxb-"))
+
+	assert.Equal(t, "Turing, Alan", Replace("(?P<first>[a-zA-Z]+) (?P<last>[a-zA-Z]+)", "${last}, ${first}", "Alan Turing"))
+}
+
+func TestMatch(t *testing.T) {
+	assert.True(t, Match(`^[a-z]+\[[0-9]+\]$`, "adam[23]"))
+	assert.True(t, Match(`^[a-z]+\[[0-9]+\]$`, "eve[7]"))
+	assert.False(t, Match(`^[a-z]+\[[0-9]+\]$`, "Job[48]"))
+	assert.False(t, Match(`^[a-z]+\[[0-9]+\]$`, "snakey"))
+}