templates: Add `humanize` function (#4767)

Co-authored-by: Francis Lavoie <lavofr@gmail.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/modules/caddyhttp/templates/tplcontext_test.go b/modules/caddyhttp/templates/tplcontext_test.go
index 61fc80c..15a369e 100644
--- a/modules/caddyhttp/templates/tplcontext_test.go
+++ b/modules/caddyhttp/templates/tplcontext_test.go
@@ -606,6 +606,55 @@ title = "Welcome"
 
 }
 
+func TestHumanize(t *testing.T) {
+	tplContext := getContextOrFail(t)
+	for i, test := range []struct {
+		format    string
+		inputData string
+		expect    string
+		errorCase bool
+		verifyErr func(actual_string, substring string) bool
+	}{
+		{
+			format:    "size",
+			inputData: "2048000",
+			expect:    "2.0 MB",
+			errorCase: false,
+			verifyErr: strings.Contains,
+		},
+		{
+			format:    "time",
+			inputData: "Fri, 05 May 2022 15:04:05 +0200",
+			expect:    "ago",
+			errorCase: false,
+			verifyErr: strings.HasSuffix,
+		},
+		{
+			format:    "time:2006-Jan-02",
+			inputData: "2022-May-05",
+			expect:    "ago",
+			errorCase: false,
+			verifyErr: strings.HasSuffix,
+		},
+		{
+			format:    "time",
+			inputData: "Fri, 05 May 2022 15:04:05 GMT+0200",
+			expect:    "error:",
+			errorCase: true,
+			verifyErr: strings.HasPrefix,
+		},
+	} {
+		if actual, err := tplContext.funcHumanize(test.format, test.inputData); !test.verifyErr(actual, test.expect) {
+			if !test.errorCase {
+				t.Errorf("Test %d: Expected '%s' but got '%s'", i, test.expect, actual)
+				if err != nil {
+					t.Errorf("Test %d: error: %s", i, err.Error())
+				}
+			}
+		}
+	}
+}
+
 func getContextOrFail(t *testing.T) TemplateContext {
 	tplContext, err := initTestContext()
 	t.Cleanup(func() {