suppress log messages for tests

src/commands/contributions.zig

@@ -247,6 +247,7 @@
 //! decided from the Lot.maturity_date field, not from the file's form.
 
 const std = @import("std");
+const builtin = @import("builtin");
 const zfin = @import("../root.zig");
 const cli = @import("common.zig");
 const git = @import("../git.zig");
@@ -732,7 +733,9 @@ fn loadDividendCredits(
     for (holdings) |h| {
         if (divs.contains(h.symbol)) continue;
         fetchDividendsInto(arena, svc, &divs, h.symbol, fetch_opts) catch |err| {
-            std.log.scoped(.contributions).warn("{s}: dividends unavailable ({t}); a dividend it paid into {s} will count as a contribution", .{ h.symbol, err, h.account });
+            // The degradation test reaches this on purpose and asserts the
+            // outcome instead.
+            if (!builtin.is_test) std.log.scoped(.contributions).warn("{s}: dividends unavailable ({t}); a dividend it paid into {s} will count as a contribution", .{ h.symbol, err, h.account });
         };
     }
     return dividendCredits(arena, holdings, w, &divs);

src/service.zig

@@ -756,7 +756,9 @@ pub const DataService = struct {
             // collapsing it, and do not negative-cache - nothing is
             // wrong with the symbol.
             if (err == DataError.NoApiKey) {
-                log.warn("{s}: {s} unavailable: no API key configured", .{ symbol, @tagName(data_type) });
+                // Tests reach this on purpose - there is no key in the test
+                // environment - and assert the typed error instead.
+                if (!builtin.is_test) log.warn("{s}: {s} unavailable: no API key configured", .{ symbol, @tagName(data_type) });
                 return DataError.NoApiKey;
             }
             // Only NotFound (provider says "this symbol genuinely has