diamond: Sync tests and generate them with Tera

exercises/practice/diamond/.meta/test_template.tera

@@ -0,0 +1,25 @@
+use diamond::*;
+
+{% for test in cases %}
+#[test]
+#[ignore]
+fn {{ test.description | make_ident }}() {
+    {# 
+      rustfmt will inline array literals under a minimum length
+      For us that means up to letter E
+      We also exclude A to keep it inlined
+    #}
+    {%- if test.input.letter is matching("[B-D]") %}
+    #[rustfmt::skip]
+    {%- endif %}
+    assert_eq!(
+        get_diamond('{{ test.input.letter }}'),
+        vec![
+            {%- for line in test.expected %}
+            "{{ line }}"{% if test.expected | length > 1 %},{% endif %}
+            {%- endfor %}
+        ]
+    );
+}
+{% endfor %}
+

exercises/practice/diamond/.meta/tests.toml

@@ -1,3 +1,25 @@
-# This is an auto-generated file. Regular comments will be removed when this
-# file is regenerated. Regenerating will not touch any manually added keys,
-# so comments can be added in a "comment" key.
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[202fb4cc-6a38-4883-9193-a29d5cb92076]
+description = "Degenerate case with a single 'A' row"
+
+[bd6a6d78-9302-42e9-8f60-ac1461e9abae]
+description = "Degenerate case with no row containing 3 distinct groups of spaces"
+
+[af8efb49-14ed-447f-8944-4cc59ce3fd76]
+description = "Smallest non-degenerate case with odd diamond side length"
+
+[e0c19a95-9888-4d05-86a0-fa81b9e70d1d]
+description = "Smallest non-degenerate case with even diamond side length"
+
+[82ea9aa9-4c0e-442a-b07e-40204e925944]
+description = "Largest possible diamond"

exercises/practice/diamond/tests/diamond.rs

@@ -1,13 +1,13 @@
 use diamond::*;
 
 #[test]
-fn a() {
+fn degenerate_case_with_a_single_a_row() {
     assert_eq!(get_diamond('A'), vec!["A"]);
 }
 
 #[test]
 #[ignore]
-fn b() {
+fn degenerate_case_with_no_row_containing_3_distinct_groups_of_spaces() {
     #[rustfmt::skip]
     assert_eq!(
         get_diamond('B'),
@@ -21,7 +21,7 @@ fn b() {
 
 #[test]
 #[ignore]
-fn c() {
+fn smallest_non_degenerate_case_with_odd_diamond_side_length() {
     #[rustfmt::skip]
     assert_eq!(
         get_diamond('C'),
@@ -37,7 +37,7 @@ fn c() {
 
 #[test]
 #[ignore]
-fn d() {
+fn smallest_non_degenerate_case_with_even_diamond_side_length() {
     #[rustfmt::skip]
     assert_eq!(
         get_diamond('D'),
@@ -55,7 +55,7 @@ fn d() {
 
 #[test]
 #[ignore]
-fn e() {
+fn largest_possible_diamond() {
     assert_eq!(
         get_diamond('Z'),
         vec![