taler-typescript-core

commit 7f8ebf5f5e52d9cfabd50006c9460287c3741d4d
parent c91e188d74a0e91051c822d6107e4653103cd162
Author: Florian Dold <dold@taler.net>
Date:   Tue, 21 Jul 2026 20:10:15 +0200

util: test the substitution default separators the C accepts

Also corrects the nested-name case: the C does not expand the name part, so
${${w}:-x} looks up the literal name and falls back to the default.

Diffstat:
M
packages/taler-util/src/talerconfig.test.ts
 | 
33
+++++++++++++++++++++++++++++++--

1 file changed, 31 insertions(+), 2 deletions(-)
diff --git a/packages/taler-util/src/talerconfig.test.ts b/packages/taler-util/src/talerconfig.test.ts
@@ -62,6 +62,34 @@ test("pathsub", (t) => {
     "http://example.com/a:-b",
   );
 
+  // The C takes the first ":" as introducing the default and merely skips a
+  // following "-" or "=", so all three spellings mean the same thing.
+  for (const expr of ["${x:-blabla}", "${x:=blabla}", "${x:blabla}"]) {
+    assert.strictEqual(
+      pathsub(expr, (v) => d[v]),
+      "blabla",
+      expr,
+    );
+  }
+  assert.strictEqual(
+    pathsub("${x:=a:=b}", (v) => d[v]),
+    "a:=b",
+  );
+  // An empty default expands to the empty string, it is not "no default".
+  assert.strictEqual(
+    pathsub("${x:}", (v) => d[v]),
+    "",
+  );
+  assert.strictEqual(
+    pathsub("${x:-}", (v) => d[v]),
+    "",
+  );
+  // A variable that is set still wins over its default.
+  assert.strictEqual(
+    pathsub("${w:-fallback}", (v) => d[v]),
+    "world",
+  );
+
   // No braces
   assert.strictEqual(
     pathsub("hello $w!", (v) => d[v]),
@@ -95,10 +123,11 @@ test("pathsub", (t) => {
     "hello world!",
   );
 
-  // No variables in variable name part
+  // The name part is not expanded: the C looks up the literal name "${w}",
+  // does not find it, and falls back to the default.
   assert.strictEqual(
     pathsub("hello ${${w}:-x}!", (v) => d[v]),
-    "hello ${${w}:-x}!",
+    "hello x!",
   );
 
   // Missing closing brace