wip: failure tests

src/unix2db/main.zig

@@ -117,9 +117,7 @@ fn execute(
 fn fail(errc: *ErrCtx, stderr: anytype, err: anytype) u8 {
     stderr.print("ERROR {s}", .{@errorName(err)}) catch {};
     var it = errc.rev();
-    while (it.next()) |msg|
+    while (it.next()) |msg| stderr.print(": {s}", .{msg}) catch {};
-        stderr.print(": {s}", .{msg}) catch {};
-
     stderr.print("\n", .{}) catch {};
     return 1;
 }
@@ -131,12 +129,10 @@ test "invalid argument" {
     const args = &[_][*:0]const u8{"--invalid-argument"};
     var stderr = ArrayList(u8).init(allocator);
     defer stderr.deinit();
-    var stderrw = stderr.writer();
     var stdout = ArrayList(u8).init(allocator);
     defer stdout.deinit();
-    var stdoutw = stdout.writer();
 
-    const exit_code = execute(allocator, stdoutw, stderrw, args[0..]);
+    const exit_code = execute(allocator, stdout.writer(), stderr.writer(), args[0..]);
     try testing.expectEqual(@as(u8, 1), exit_code);
     try testing.expect(mem.startsWith(
         u8,
@@ -145,6 +141,35 @@ test "invalid argument" {
     ));
 }
 
+test "trivial error: missing passwd file" {
+    const allocator = testing.allocator;
+    const args = &[_][*:0]const u8{};
+    var stderr = ArrayList(u8).init(allocator);
+    defer stderr.deinit();
+    var stdout = ArrayList(u8).init(allocator);
+    defer stdout.deinit();
+
+    const exit_code = execute(allocator, stdout.writer(), stderr.writer(), args[0..]);
+    try testing.expectEqual(@as(u8, 1), exit_code);
+    std.debug.print("stderr: '{s}'\n", .{stderr.items});
+    if (true) return error.SkipZigTest;
+    try testing.expect(mem.startsWith(
+        u8,
+        stderr.items,
+        "ERROR: FileNotFound: fubar",
+    ));
+}
+
+test "fail" {
+    var errc = ErrCtx{};
+    var stderr = ArrayList(u8).init(testing.allocator);
+    defer stderr.deinit();
+    var stderrw = stderr.writer();
+    const exit_code = fail(errc.wrapf("got 1", .{}), stderrw, error.NotSure);
+    try testing.expectEqual(exit_code, 1);
+    std.debug.print("stderr: '{s}'\n", .{stderr.items});
+}
+
 test "smoke test" {
     const allocator = testing.allocator;
     var stderr = ArrayList(u8).init(allocator);