strings: add a Builder.ensure_cap() method (#13755)

2023-08-10 21:13:21 +03:00 · 2022-03-18 09:36:53 +01:00
parent 136f39a2d4
commit 8a2d3f6470
2 changed files with 37 additions and 0 deletions
--- a/vlib/strings/builder_test.v
+++ b/vlib/strings/builder_test.v
@ -112,3 +112,18 @@ fn test_write_runes() {
 	x := sb.str()
 	assert x == 'hello world'
 }
+
+fn test_ensure_cap() {
+	mut sb := strings.new_builder(0)
+	assert sb.cap == 0
+	sb.ensure_cap(10)
+	assert sb.cap == 10
+	sb.ensure_cap(10)
+	assert sb.cap == 10
+	sb.ensure_cap(15)
+	assert sb.cap == 15
+	sb.ensure_cap(10)
+	assert sb.cap == 15
+	sb.ensure_cap(-1)
+	assert sb.cap == 15
+}