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Small improvement for testing.expectEqualStrings function #25828

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Small improvement for testing.expectEqualStrings function #25828

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0b587b1
Adding comment to testing.expectEqualStrings
JWPapi Nov 5, 2025
7c056c6
Update testing.zig
JWPapi Nov 12, 2025
a4ffc85
Update testing.zig
JWPapi Nov 12, 2025
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3 changes: 3 additions & 0 deletions lib/std/testing.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -642,6 +642,9 @@ pub fn tmpDir(opts: std.fs.Dir.OpenOptions) TmpDir {
};
}

/// This functions is to be used only in tests. When the two strings are not
/// equal, prints diagnostics to stderr to show exactly how they are not equal,
/// then returns a `error.TestExpectedEqual`.
pub fn expectEqualStrings(expected: []const u8, actual: []const u8) !void {
if (std.mem.indexOfDiff(u8, actual, expected)) |diff_index| {
if (@inComptime()) {
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