[ty] Add regression test for diagnostic rendering panic

BurntSushi · BurntSushi · commit 6e25cfba2b2f · 2025-06-26T11:12:16.000-04:00
This converts the MRE in #670 into a fixture test for `annotate-snippets`.
diff --git a/crates/ruff_annotate_snippets/tests/fixtures/color/regression_leading_tab_long_line.svg b/crates/ruff_annotate_snippets/tests/fixtures/color/regression_leading_tab_long_line.svg
@@ -0,0 +1,36 @@
+<svg width="1196px" height="128px" xmlns="http://www.w3.org/2000/svg">
+  <style>
+    .fg { fill: #AAAAAA }
+    .bg { background: #000000 }
+    .fg-bright-blue { fill: #5555FF }
+    .fg-bright-red { fill: #FF5555 }
+    .container {
+      padding: 0 10px;
+      line-height: 18px;
+    }
+    .bold { font-weight: bold; }
+    tspan {
+      font: 14px SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;
+      white-space: pre;
+      line-height: 18px;
+    }
+  </style>
+
+  <rect width="100%" height="100%" y="0" rx="4.5" class="bg" />
+
+  <text xml:space="preserve" class="container fg">
+    <tspan x="10px" y="28px"><tspan class="fg-bright-red bold">error[E0308]</tspan><tspan>: </tspan><tspan class="bold">mismatched types</tspan>
+</tspan>
+    <tspan x="10px" y="46px"><tspan> </tspan><tspan class="fg-bright-blue bold">--&gt;</tspan><tspan> $DIR/non-whitespace-trimming.rs:4:6</tspan>
+</tspan>
+    <tspan x="10px" y="64px"><tspan>  </tspan><tspan class="fg-bright-blue bold">|</tspan>
+</tspan>
+    <tspan x="10px" y="82px"><tspan class="fg-bright-blue bold">4 |</tspan><tspan> </tspan><tspan class="fg-bright-blue bold">...</tspan><tspan>   s_data['d_dails'] = bb['contacted'][hostip]['ansible_facts']['ansible_devices']['vda']['vendor'] + " " + bb['contacted'][hostip</tspan><tspan class="fg-bright-blue bold">...</tspan>
+</tspan>
+    <tspan x="10px" y="100px"><tspan class="fg-bright-red bold">^</tspan><tspan> </tspan><tspan class="fg-bright-blue bold">|</tspan><tspan> </tspan><tspan class="fg-bright-red bold">unresolved reference</tspan>
+</tspan>
+    <tspan x="10px" y="118px"><tspan>  </tspan><tspan class="fg-bright-blue bold">|</tspan>
+</tspan>
+  </text>
+
+</svg>
diff --git a/crates/ruff_annotate_snippets/tests/fixtures/color/regression_leading_tab_long_line.toml b/crates/ruff_annotate_snippets/tests/fixtures/color/regression_leading_tab_long_line.toml
@@ -0,0 +1,20 @@
+[message]
+level = "Error"
+id = "E0308"
+title = "mismatched types"
+
+[[message.snippets]]
+source = """
+					s_data['d_dails'] = bb['contacted'][hostip]['ansible_facts']['ansible_devices']['vda']['vendor'] + " " + bb['contacted'][hostip]['an
+"""
+line_start = 4
+origin = "$DIR/non-whitespace-trimming.rs"
+
+[[message.snippets.annotations]]
+label = ""
+level = "Error"
+range = [5, 11]
+
+[renderer]
+# anonymized_line_numbers = true
+color = true
