From be926c4c8190343435664c99d7c8ae6464eec48f Mon Sep 17 00:00:00 2001
From: midnightconman <midnightconman@gmail.com>
Date: Wed, 8 May 2024 15:09:39 -0700
Subject: [PATCH 1/3] Added string.capitalize

---
 string.libsonnet | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/string.libsonnet b/string.libsonnet
index 6655981..35fbdec 100644
--- a/string.libsonnet
+++ b/string.libsonnet
@@ -12,6 +12,14 @@ local d = import 'github.com/jsonnet-libs/docsonnet/doc-util/main.libsonnet';
   // character and thereby will unlikely be in a valid key by accident. Only when we include it.
   local BelRune = std.char(7),
 
+  '#capitalize':: d.fn(
+    |||
+      `capitalize` will uppercase the first letter of string.
+    |||,
+    [d.arg('str', d.T.string)]
+  ),
+  capitalize(str): std.asciiUpper(str[0]) + std.substr(str, 1, std.length(str) - 1),
+
   '#splitEscape':: d.fn(
     |||
       `split` works the same as `std.split` but with support for escaping the dividing

From c8fdc612a54d73aa6a57dddd108b68117e3c3515 Mon Sep 17 00:00:00 2001
From: midnightconman <midnightconman@gmail.com>
Date: Wed, 8 May 2024 15:13:33 -0700
Subject: [PATCH 2/3] with possible string test

---
 test/string_test.jsonnet | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 test/string_test.jsonnet

diff --git a/test/string_test.jsonnet b/test/string_test.jsonnet
new file mode 100644
index 0000000..43a9435
--- /dev/null
+++ b/test/string_test.jsonnet
@@ -0,0 +1,19 @@
+local xtd = import '../main.libsonnet';
+local test = import 'github.com/jsonnet-libs/testonnet/main.libsonnet';
+
+test.new(std.thisFile)
++ test.case.new(
+  name='empty',
+  test=test.expect.eq(
+    actual=xtd.string.capitalize(''),
+    expected='',
+  )
+)
+
++ test.case.new(
+  name='abc',
+  test=test.expect.eq(
+    actual=xtd.string.capitalize('abc'),
+    expected='Abc',
+  )
+)

From db4613f22de7a88d07cfbe7311bf61aeb72b2ff5 Mon Sep 17 00:00:00 2001
From: midnightconman <midnightconman@gmail.com>
Date: Wed, 8 May 2024 15:30:45 -0700
Subject: [PATCH 3/3] with passing tests

---
 string.libsonnet | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/string.libsonnet b/string.libsonnet
index 35fbdec..4245c6e 100644
--- a/string.libsonnet
+++ b/string.libsonnet
@@ -18,7 +18,8 @@ local d = import 'github.com/jsonnet-libs/docsonnet/doc-util/main.libsonnet';
     |||,
     [d.arg('str', d.T.string)]
   ),
-  capitalize(str): std.asciiUpper(str[0]) + std.substr(str, 1, std.length(str) - 1),
+  capitalize(str): if std.length(str) > 0 then
+    std.asciiUpper(str[0]) + std.substr(str, 1, std.length(str) - 1) else '',
 
   '#splitEscape':: d.fn(
     |||